US Safety Couplings. Partner for Performance

Transcription

1 US Safety Couplings Partner for Performance

2 Welcome to your system supplier for every aspect of power transmission RINGFEDER POWER TRANSMISSION We say what we mean and mean what we say. We see things from our customers perspective. We are considerate of our employees and their families as well as our environment and the society. RINGFEDER POWER TRANSMISSION is the global market leader in the niche markets of drive technology and is well regarded for its customer-specific, application-oriented solutions that ensure excellent and failure-free operation for its clients. 2

3 Mars Rover: Courtesy NASA/ JPL-Caltech We offer locking devices, couplings, bearing housings and damping technology for OEMs but also for the final customer under our strong brand names RINGFEDER, TSCHAN, HENFEL and GERWAH. Our brand ECOLOC supplies reliable products off the shelf. We not only provide competent advice to our customers on the basis of our 90 years of experience but also develop innovative ideas in cooperation with them. This is part of our aspiration to be a Partner for Performance. Around the power transmission we promise Excellent know-how for our challenging customers Best cost-benefit ratio Short reaction times and a high product availability 3

4 Content 02 Corporate Image Basics 06 Information DXM/E Series 28 Characteristics 30 GERWAH DXM/E-CI 32 GERWAH DXM/E-OI 34 GERWAH DXM/E-KK DXR/L Series 08 Characteristics 10 GERWAH DXR/L-Fl 36 Technical Information 44 Fax Inquiry DXM/C(L) Series 12 Characteristics 14 GERWAH DXM/C-FK 16 GERWAH DXM/C-FI 18 GERWAH DXM/CL-FK 20 GERWAH DXM/CL-FI 47 Product Range RINGFEDER POWER TRANSMISSION DXM/CD Series 22 Characteristics 24 GERWAH DXM/CD-FK 26 GERWAH DXM/CD-FI DXR/B Series and DXR/E Series on request available All technical details and information are non-binding and cannot be used as a basis for legal claims. The user is obligated to determine whether the represented products meet his requirements. We reserve the right at all times to carry out modifications in the interests of technical progress. Upon the issue of this catalogue all previous brochures and questionnaires on the products displayed are no longer valid. 4

5 Series DXR/L Series Page 10 Backlash-free safety coupling with a flange designed for the direct mounting of sprocket wheels, pulleys, gear wheels and similar fittings Page 14 DXM/C(L) Series Backlash-free safety coupling with a flange and ball bearing for the direct mounting of sprocket wheels, pulleys, gear wheels and similar fittings Page 24 DXM/CD Series Backlash-free safety coupling with a flange and robust, double ball bearing for the direct mounting of sprocket wheels, pulleys, gear wheels and similar fittings Designed for higher loads DXM/E Series Page 30 Backlash-free safety coupling, designed to connect two shafts equipped with an elastomeric spider which serves as a torsionally flexible compensation element High damping characteristic Compensation of axial, radial and angular shaft misalignment 5

6 Basics Backlash-free Safety Couplings GERWAH Backlash-free Safety Couplings are precision torque limiters with different functional principles for overloads: Machine and system protection High-speed disengagement within 2-4 msec. Minimal residual friction Process control Accurate adjustment of disengaging torque Signalling of overloads Process accuracy Backlash-free torque transmission Excellent disengagement repeatability after long downtimes Easy handling High dynamic Low mass moment of inertia Specific customer solutions High flexibility through modular design Customers benefit Higher machine availability, increased productivity and profitability Lightweight construction possible, low masses, flexibility and dynamic of the machine are increasing, energy costs are reduced Machine parts can be used optimal because peak loads have no chance No damage by large destructive forces (e.g. in a collision) Long durability, i.e. constant production quality, longer machine operating times, better amortization 6

7 Basics The principle of the spring-loaded form closure as an overload protection Balls detent system - unlatching position Balls detent system - latching position Single position re-engagement Multi position re-engagement Single position re-engagement Multi position re-engagement 7

8 Series DXR/L Single position re-engagement / multi position re-engagement - backlash-free Characteristics Backlash-free safety coupling with a flange for the direct mounting of sprocket wheels, pulleys, gear wheels and similar fittings Advantages Backlash-free transmission of the torque Fast cut-off within 2-4 msec. Signal delivery at overload possible with a proximity switch Compact construction Low moment of inertia Marginal residual friction after disengaging High durability 8

9 Series GERWAH DXR/L-Fl With flange hub inner cone Torque ft-lbs Page 10 9

10 GERWAH DXR/L-Fl with flange hub - inner cone hub Single position re-engagement / multi position re-engagement - backlash-free Dimensions d 1min = Min. bore diameter d 1max = Max. bore diameter A = Max. outer diameter C = Pitch circle diameter D 4 = Outer diameter hub D F = Center diameter K 2 = Clamping length L = Total length L 1 = Length of coupling N = Distance between shift ring and coupling overhang Z = Depth of center value S = Disengagement travel n G1 = Quantity of threads G1 n Sc2 = Quantity of clamping screws D G2 D G1 ; D G2 = Thread T G1 = Depth of thread G1 Dimensions Size d 1 min-max A C D 4 D F K 2 L L 1 N Z S n G1 x D G1 T G1 n Sc2 x D G2 inch inch inch inch inch inch inch inch x M x M x M x M x M x M x M x M x M x M x M x M x M x M x M x M x M x M x M x M16 Ordering example: GERWAH DXR/L-Fl Type Size Bore diameter d 1 ft-lbs Version Functional principle DXR/L-Fl a C Torque range: a, b or c Functional principle: C = Single position re-engagement (360 ) D = Multi position re-engagement ft-lbs = Torque requested 10

11 GERWAH DXR/L-Fl with flange hub - inner cone hub Single position re-engagement / multi position re-engagement - backlash-free Z L1 L Technical Data A C DF d1 T A2 = Tightened torque of clamping screw D G2 T KN (a) = Min./Max. adjustment value for T (vers. a) T KN (b) = Min./Max. adjustment value for T (vers. b) T KN (c) = Min./Max. adjustment value for T (vers. c) J = Total moment of inertia n max = Max. rotation speed Gw = Weight DG1 DG2 TG1 S Sectional view Technical Data Size T A2 T KN (a) min-max T KN (b) min-max T KN (c) min-max J n max Gw ft-lbs ft-lbs ft-lbs ft-lbs lbs-in 2 rpm lbs The shaft tolerance must be within the fit tolerance g6 or h7 Metal bellows and servo-insert version available on request 11

12 Series DXM/C(L) Multi position re-engagement / single position re-engagement - backlash-free Characteristics Backlash-free safety coupling with a flange hub and ball bearing for the direct mounting of sprocket wheels, pulleys, gear wheels and similar fittings Advantages Backlash-free transmission of the torque Fast cut-off within 2-4 msec. Signal delivery at overload possible with a proximity switch Compact construction Low moment of inertia Marginal residual friction after disengaging High durability 12

13 Series DXM/C(L) Series GERWAH DXM/C-FK Short hub with flange hub parallel key Torque ft-lbs Page 14 Series GERWAH DXM/C-FI Short hub with flange hub cone hub Torque ft-lbs Page 16 Series GERWAH DXM/CL-FK Long hub with flange hub keyway hub for use in wide driving elements or objects with small diameters Sleeve bearings, needle bearings and ball bearings are additionally suitable to support the driving element on long hubs Torque ft-lbs Page 18 Series GERWAH DXM/CL-FI Long hub with flange hub cone hub for use in wide driving elements or objects with small diameters Sleeve bearings, needle bearings and ball bearings are additionally suitable to support the driving element on long hubs Torque ft-lbs Page 20 13

14 GERWAH DXM/C-FK short hub with flange hub keyway hub Multi position re-engagement / single position re-engagement - backlash-free Dimensions d 1kmin = Min. bore diameter with keyway acc. to DIN d 1kmax = Max. bore diameter with keyway acc. to DIN d 1kmax* = Max. bore diameter with keyway acc. to DIN A = Max. outer diameter C = Pitch circle diameter D 1 = Outer diameter hub D 2 = Outer diameter hub D F = Center diameter L = Total length N = Distance between shift ring and coupling overhang O = Length of shift ring Z = Depth of center value S = Disengagement travel n Sc1 = Quantity of clamping screws D G1 D G1 = Thread T G1 = Depth of thread G1 Dimensions Size d 1k min-max d 1kmax* A C D 1 D 2 D F L N O Z S n Sc1 x D G1 T G1 inch inch inch inch inch inch inch h x M h x M h x M h x M h x M Ordering example: GERWAH DXM/C-FK Type Size Bore diameter d 1k ft-lbs Version Functional principle DXM/C-FK b C Torque range: a,b or c Functional principle: C = Single position re-engagement (360 ) D = Multi position re-engagement (Grid spacing 15 ) ft-lbs = Torque requested 14

15 GERWAH DXM/C-FK short hub with flange hub keyway hub Multi position re-engagement / single position re-engagement - backlash-free L Technical Data Z O N T KN (a) = Min./Max. adjustment value for T (vers. a) T KN (b) = Min./Max. adjustment value for T (vers. b) T KN (c) = Min./Max. adjustment value for T (vers. c) J N = Moment of inertia hub side J F = Moment of inertia on thrust flange side n max = Max. rotation speed Gw = Weight DG1 D1 C DF d1 D2 A TG1 S Sectional view Technical Data Size T KN (a) min-max T KN (b) min-max T KN (c) min-max J N J F n max Gw ft-lbs ft-lbs ft-lbs 10-3 lbs-in lbs-in 2 rpm lbs

16 GERWAH DXM/C-FI short hub with flange hub inner cone hub Multi position re-engagement / single position re-engagement - backlash-free Dimensions d 1min d 1max A C D 1 D 2 D 4 D F K SH K 2 L L 1 N O Z S = Min. bore diameter = Max. bore diameter = Max. outer diameter = Pitch circle diameter = Outer diameter hub = Outer diameter hub = Outer diameter hub = Center diameter = Wide of srew head = Clamping length = Total length = Length of coupling = Distance between shift ring and coupling overhang = Length of shift ring = Depth of center value = Disengagement travel n Sc1 = Quantity of clamping screws D G1 D G1 ; D G2 = Thread T G1 n Sc2 = Depth of thread G1 = Quantity of clamping screws D G2 Dimensions Size d 1 min-max A C D 1 D 2 D 4 D F K 2 K SH L L 1 N O Z S n Sc1 x D G1 T G1 n Sc2 x D G2 inch inch inch inch inch inch inch inch h x M x M h x M x M h x M x M h x M x M h x M x M6 Ordering example: GERWAH DXM/C-FI Type Size Bore diameter d 1 ft-lbs Version Functional principle DXM/C-FI b C Torque range: a, b or c Functional principle: C = Single position re-engagement (360 ) D = Multi position re-engagement (Grid spacing 15 ) ft-lbs = Torque requested 16

17 GERWAH DXM/C-FI short hub with flange hub inner cone hub Multi position re-engagement / single position re-engagement - backlash-free D1 C DF d1 Z L L1 O N K2 D4 D2 A Technical Data T A2 = Tightened torque of clamping screw D G2 T KN (a) = Min./Max. adjustment value for T (vers. a) T KN (b) = Min./Max. adjustment value for T (vers. b) T KN (c) = Min./Max. adjustment value for T (vers. c) J N = Moment of inertia hub side J F = Moment of inertia on thrust flange side n max = Max. rotation speed Gw = Weight DG1 DG2 TG1 S Sectional view Technical Data Size T A2 T KN (a) min-max T KN (b) min-max T KN (c) min-max J N J F n max Gw ft-lbs ft-lbs ft-lbs ft-lbs 10-3 lbs-in lbs-in 2 rpm lbs

18 GERWAH DXM/CL-FK long hub with flange hub keyway hub Multi position re-engagement / single position re-engagement - backlash-free Dimensions d 1kmin = Min. bore diameter with keyway acc. to DIN d 1kmax = Max. bore diameter with keyway acc. to DIN d 1kmax* = Max. bore diameter with keyway acc. to DIN A = Max. outer diameter C = Pitch circle diameter D 1 = Outer diameter hub D 2 = Outer diameter hub D 3 = Outer diameter hub D F = Center diameter L = Total length L 2 = Length on the hub N = Distance between shift ring and coupling overhang O = Length of shift ring Z = Depth of center value S = Disengagement travel n Sc1 = Quantity of clamping screws D G1 D G1 = Thread T G1 = Depth of thread G1 Dimensions Size d 1k min-max d 1kmax* A C D 1 D 2 D 3 D F L L 2 N O Z S n Sc1 x D G1 T G1 inch inch inch inch inch inch inch h h x M h h x M h h x M h h x M h h x M Ordering example: GERWAH DXM/CL-FK Type Size Bore diameter d 1k ft-lbs Version Functional principle DXM/CL-FK b C Torque range: a, b or c Functional principle: C = Single position re-engagement (360 ) D = Multi position re-engagement (Grid spacing 15 ) ft-lbs = Torque requested 18

19 GERWAH DXM/CL-FK long hub with flange hub keyway hub Multi position re-engagement / single position re-engagement - backlash-free L Z O N Technical Data D1 C DF D3 d1 L2 D2 A T KN (a) = Min./Max. adjustment value for T (vers. a) T KN (b) = Min./Max. adjustment value for T (vers. b) T KN (c) = Min./Max. adjustment value for T at (vers. c) J N = Moment of inertia hub side J F = Moment of inertia on thrust flange side n max = Max. rotation speed Gw = Weight DG1 TG1 S Sectional view Technical Data T KN (a) T KN (b) T KN (c) Size min-max min-max min-max J N J F n max Gw ft-lbs ft-lbs ft-lbs 10-3 lbs-in lbs-in 2 rpm lbs

20 GERWAH DXM/CL-FI long hub with flange hub inner cone hub Multi position re-engagement / single position re-engagement - backlash-free Dimensions d 1min = Min. bore diameter d 1max = Max. bore diameter A = Max. outer diameter C = Pitch circle diameter D 1 = Outer diameter hub D 2 = Outer diameter hub D 3 = Outer diameter hub D 4 = Outer diameter hub D F = Center diameter K 2 = Clamping length L = Total length L 1 = Length of coupling L 2 = Length on the hub N = Distance between shift ring and coupling overhang O = Length of shift ring Z = Depth of center value S = Disengagement travel n G1 = Quantity of threads G1 D G1 ; D G2 = Thread T G1 = Depth of thread G1 n Sc2 = Quantity of clamping screws D G2 Dimensions Size d 1 min-max A C D 1 D 2 D 3 D 4 D F K 2 L L 1 L 2 N O Z S n G1 x D G1 T G1 n Sc2 x D G2 inch inch inch inch inch h h x M x M h h x M x M h h x M x M h h x M x M h h x M x M6 Ordering example: GERWAH DXM/CL-FI Type Size Bore diameter d 1 ft-lbs Version Functional principle DXM/CL-FI b C Torque range: a, b or c Functional principle: C = Single position re-engagement (360 ) D = Multi position re-engagement (Grid spacing 15 ) ft-lbs = Torque requested 20

21 GERWAH DXM/CL-FI long hub with flange hub inner cone hub Multi position re-engagement / single position re-engagement - backlash-free L Technical Data D1 C DF D3 d1 Z L2 L1 O N K2 D4 D2 A T A2 = Tightened torque of clamping screw D G2 T KN (a) = Min./Max. adjustment value for T (vers. a) T KN (b) = Min./Max. adjustment value for T (vers. b) T KN (c) = Min./Max. adjustment value for T (vers. c) J N J F n max Gw = Moment of inertia hub side = Moment of inertia on thrust flange side = Max. rotation speed = Weight DG1 DG2 TG1 S Sectional view Technical Data T KN (a) T KN (b) T KN (c) Size T A2 min-max min-max min-max J N J F n max Gw ft-lbs ft-lbs ft-lbs ft-lbs 10-3 lbs-in lbs-in 2 rpm lbs

22 Series DXM/CD double mounted Multi position re-engagement / single position re-engagement - backlash-free Characteristics Backlash-free safety coupling with a flange hub and robust, double ball bearing for the direct mounting of sprocket wheels, pulleys, gear wheels and similar fittings Designed for higher loads Advantages Backlash-free transmission of the torque Fast cut-off within 2-4 msec. Signal delivery at overload possible with a proximity switch Compact construction Low moment of inertia Marginal residual friction after disengaging High durability 22

23 Series DXM/CD double mounted Series GERWAH DXM/CD-FK With flange hub keyway hub Torque ft-lbs Page 24 Series GERWAH DXM/CD-FI With flange hub cone hub Torque ft-lbs Page 26 23

24 GERWAH DXM/CD-FK double mounted; with flange hub keyway hub Multi position re-engagement / single position re-engagement - backlash-free Dimensions d 1kmin = Min. bore diameter with keyway acc. to DIN d 1kmax = Max. bore diameter with keyway acc. to DIN d 1kmax* = Max. bore diameter with keyway acc. to DIN A C D 1 D 2 D F L N O Z S = Max. outer diameter = Pitch circle diameter = Outer diameter hub = Outer diameter hub = Center diameter = Total length = Distance between shift ring and coupling overhang = Length of shift ring = Depth of center value = Disengagement travel n Sc1 = Quantity of clamping screws D G1 D G1 = Thread T G1 = Depth of thread G1 Dimensions Size d 1k min-max d 1kmax* A C D 1 D 2 D F L N O Z S n Sc1 x D G1 T G1 inch inch inch inch inch inch inch h x M h x M h x M h x M h x M Ordering example: GERWAH DXM/CD-FK Type Size Bore diameter d 1k ft-lbs Version Functional principle DXM/CD-FK b C Torque range: a, b or c Functional principle: C = Single position re-engagement (360 ) D = Multi position re-engagement (Grid spacing 15 ) ft-lbs = Torque requested 24

25 GERWAH DXM/CD-FK double mounted; with flange hub keyway hub Multi position re-engagement / single position re-engagement - backlash-free L Technical Data Z O N T KN (a) = Min./Max. adjustment value for T (vers. a) T KN (b) = Min./Max. adjustment value for T (vers. b) T KN (c) = Min./Max. adjustment value for T (vers. c) J N = Moment of inertia hub side J F = Moment of inertia on thrust flange side n max = Max. rotation speed Gw = Weight DG1 D1 C DF d1 D2 A TG1 S Sectional view Technical Data T KN (a) T KN (b) T KN (c) Size min-max min-max min-max J N J F n max Gw ft-lbs ft-lbs ft-lbs 10-3 lbs-in lbs-in 2 rpm lbs

26 GERWAH DXM/CD-FI double mounted; with flange hub cone hub Multi position re-engagement / single position re-engagement - backlash-free Dimensions d 1min d 1max A C D 1 D 2 D 4 D F K 2 L L 1 N O Z S = Min. bore diameter = Max. bore diameter = Max. outer diameter = Pitch circle diameter = Outer diameter hub = Outer diameter hub = Outer diameter hub = Center diameter = Clamping length = Total length = Length of coupling = Distance between shift ring and coupling overhang = Length of shift ring = Depth of center value = Disengagement travel n Sc1 = Quantity of clamping screws D G1 D G1 ; D G2 = Thread T G1 n Sc2 = Depth of thread G1 = Quantity of clamping screws D G2 Dimensions Size d 1 min-max A C D 1 D 2 D 4 D F K 2 L L 1 N O Z S n Sc1 x D G1 T G1 n Sc2 x D G2 inch inch inch inch inch inch inch h x M x M h x M x M h x M x M h x M x M h x M x M6 Ordering example: GERWAH DXM/CD-FI Type Size Bore diameter d 1 ft-lbs Version Functional principle DXM/CD-FI b C Torque range: a, b or c Functional principle: C = Single position re-engagement (360 ) D = Multi position re-engagement (Grid spacing 15 ) ft-lbs = Torque requested 26

27 GERWAH DXM/CD-FI double mounted; with flange hub cone hub Multi position re-engagement / single position re-engagement - backlash-free L Technical Data L1 D1 C DF d1 Z O N D4 D2 A T A2 = Tightened torque of clamping screw D G2 T KN (a) = Min./Max. adjustment value for T (vers. a) T KN (b) = Min./Max. adjustment value for T (vers. b) T KN (c) = Min./Max. adjustment value for T (vers. c) J N = Moment of inertia hub side J F = Moment of inertia on thrust flange side n max = Max. rotation speed Gw = Weight K2 DG1 DG2 TG1 S Sectional view Technical Data Size T A2 T KN (a) min-max T KN (b) min-max T KN (c) min-max J N J F n max Gw ft-lbs ft-lbs ft-lbs ft-lbs 10-3 lbs-in lbs-in 2 rpm lbs

28 Series DXM/E Multi position re-engagement / single position re-engagement - backlash-free Characteristics Safety coupling, two-shaft version with an elastomeric spider as a flexible compensation element High damping characteristic Compensation of axial, radial and angular shaft misalignment Advantages Backlash-free transmission of the torque Fast cut-off within 2-4 msec. Signal delivery at overload possible with a proximity switch Compact construction Low moment of inertia Marginal residual friction after disengaging High durability 28

29 Series DXM/E Series GERWAH DXM/E-CI With clamping hub - cone hub for easy assembly / disassembly Torque ft-lbs Page 30 Series GERWAH DXM/E-OI With shrink disc hub cone hub Torque ft-lbs Page 32 Series GERWAH DXM/E-KK With keyway hub - keyway hub Torque ft-lbs Page 34 29

30 GERWAH DXM/E-CI elastomeric spider with clamping hub inner cone hub Multi position re-engagement / single position re-engagement - backlash-free Dimensions d 1,2min = Min. bore diameter d 1,2max = Max. bore diameter A = Max. outer diameter D 1 = Outer diameter hub D 2 = Outer diameter hub D 3 = Outer diameter hub D 4 = Outer diameter hub E 2 = Max. rack length of shaft l = Distance between center screw hole and hub end K 2 = Clamping length L = Total length L 1 = Length of coupling L 2 = Length on the hub N = Distance between shift ring and coupling overhang O = Length of shift ring S = Disengagement travel n Sc1 = Quantity of clamping screws D G1 D G1 ; D G2 = Thread n Sc2 = Quantity of clamping screws D G2 Dimensions Size d 1 min-max d 2 min-max A D 1 D 2 D 3 D 4 E 2 I K 2 L L 1 L 2 N O S n Sc1 x D G1 n Sc2 x D G2 inch x M6 6 x M x M8 6 x M x M8 8 x M x M8 8 x M x M12 12 x M6 Ordering example: GERWAH DXM/E-Cl Type Size Bore diameter d 1 Bore diameter d 2 ft-lbs Version Functional principle DXM/E-CI b C Torque range: a, b or c Functional principle: C = Single position re-engagement (360 ) D = Multi position re-engagement (Grid spacing 15 ) ft-lbs = Torque requested 30

31 GERWAH DXM/E-CI elastomeric spider with clamping hub inner cone hub Multi position re-engagement / single position re-engagement - backlash-free Technical Data L D1 D3 d1 DG1 L2 L1 O N E2 K2 d2 D4 D2 A DG2 T A1 = Tightened torque of clamping screw D G1 T A2 = Tightened torque of clamping screw D G2 T KN (a) = Min./Max. adjustment value for T (vers. a) T KN (b) = Min./Max. adjustment value for T (vers. b) T KN (c) = Min./Max. adjustment value for T (vers. c) Ka = Max. permissible axial misalignment Kr = Max. approved misalignment radial with elastomer 92ShA/98ShA Kw = Max. approved misalignment angular with elastomer 92ShA/98ShA J N = Moment of inertia hub side J F = Moment of inertia on thrust flange side n max = Max. rotation speed Gw = Weight l S Sectional view Technical Data T KN (a) T KN (b) T KN (c) ΔKr ΔKw Size T A1 T A2 min-max min-max min-max ΔKa (92ShA) (98ShA) (92ShA) (98ShA) J N J F n max Gw ft-lbs ft-lbs ft-lbs ft-lbs ft-lbs inch inch inch 10-3 lbs-in lbs-in 2 rpm lbs

32 GERWAH DXM/E-OI elastomeric spider with outer cone hub inner cone hub Multi position re-engagement / single position re-engagement - backlash-free Dimensions d 1,2min d 1,2max A D 1 D 2 D 3 D 4 E 2 K 2 L L 1 L 2 N O S = Min. bore diameter = Max. bore diameter = Max. outer diameter = Outer diameter hub = Outer diameter hub = Outer diameter hub = Outer diameter hub = Max. rack length of shaft = Clamping length = Total length = Length of coupling = Length on the hub = Distance between shift ring and coupling overhang = Length of shift ring = Disengagement travel n Sc1 = Quantity of clamping screws D G1 D G1 ; D G2 = Thread n Sc2 = Quantity of clamping screws D G2 Dimensions Size d 1 min-max d 2 min-max A D 1 D 2 D 3 D 4 E 2 K 2 L L 1 L 2 N O S n Sc1 x D G1 n Sc2 x D G2 inch x M5 6 x M x M5 6 x M x M5 8 x M x M8 8 x M x M10 8 x M6 Ordering example: GERWAH DXM/E-OI Type Size Bore diameter d 1 Bore diameter d 2 ft-lbs Version Functional principle DXM/E-OI b C Torque range: a, b or c Functional principle: C = Single position re-engagement (360 ) D = Multi position re-engagement (Grid spacing 15 ) ft-lbs = Torque requested 32

33 GERWAH DXM/E-OI elastomeric spider with outer cone hub inner cone hub Multi position re-engagement / single position re-engagement - backlash-free Technical Data L L 2 L 1 O N T A1 = Tightened torque of clamping screw D G1 D1 D3 d1 DG1 E 2 K 2 d2 D4 D2 A D G2 T A2 = Tightened torque of clamping screw D G2 T KN (a) = Min./Max. adjustment value for T (vers. a) T KN (b) = Min./Max. adjustment value for T (vers. b) T KN (c) = Min./Max. adjustment value for T (vers. c) Ka = Max. permissible axial misalignment Kr = Max. approved misalignment radial with elastomer 92ShA/98ShA Kw = Max. approved misalignment angular with elastomer 92ShA/98ShA J N = Moment of inertia on hub side J F = Moment of inertia on thrust flange side n max = Max. rotation speed Gw = Weight S Sectional view Technical Data T KN (a) T KN (b) T KN (c) ΔKr ΔKw Size T A1 T A2 min-max min-max min-max ΔKa (92ShA) (98ShA) (92ShA) (98ShA) J N J F n max Gw ft-lbs ft-lbs ft-lbs ft-lbs ft-lbs inch inch inch 10-3 lbs-in lbs-in 2 rpm lbs

34 GERWAH DXM/E-KK elastomeric spider with keyway hub keyway hub Multi position re-engagement / single position re-engagement - backlash-free Dimensions d 1,2kmin = Min. bore diameter with keyway acc. to DIN d 1,2kmax = Max. bore diameter with keyway acc. to DIN d 2kmax* = Max. bore diameter with keyway acc. to DIN A = Max. outer diameter D 1 = Outer diameter hub D 2 = Outer diameter hub D 3 = Outer diameter hub E 2 = Max. rack length of shaft L = Total length L 1 = Length of coupling L 2 = Length on the hub N = Distance between shift ring and coupling overhang O = Length of shift ring S = Disengagement travel n Sc1 = Quantity of clamping screws D G1 D G1 = Thread Dimensions Size d 1k min-max d 2k min-max d 2kmax* A D 1 D 2 D 3 E 2 L L 1 L 2 N O S n Sc1 x D G1 inch inch inch inch inch inch inch inch x M x M x M x M x M8 Ordering example: GERWAH DXM/E-KK Type Size Bore diameter d 1k Bore diameter d 2k ft-lbs Version Functional principle DXM/E-KK b C Torque range: a, b or c Functional principle: C = Single position re-engagement (360 ) D = Multi position re-engagement (Grid spacing 15 ) ft-lbs = Torque requested 34

35 GERWAH DXM/E-KK elastomeric spider with keyway hub keyway hub Multi position re-engagement / single position re-engagement - backlash-free Technical Data D1 D3 d1 L2 L L1 O N E2 d2 D2 A T A1 = Tightened torque of clamping screw D G1 T KN (a) = Min./Max. adjustment value for T (vers. a) T KN (b) = Min./Max. adjustment value for T (vers. b) T KN (c) = Min./Max. adjustment value for T (vers. c) Ka = Max. permissible axial misalignment Kr = Max. approved misalignment radial with elastomer 92ShA/98ShA Kw = Max. approved misalignment angular with elastomer 92ShA/98ShA J N = Moment of inertia hub side J F = Moment of inertia on thrust flange side n max = Max. rotation speed Gw = Weight DG1 S Sectional view Technical Data T KN (a) T KN (b) T KN (c) ΔKr ΔKw Size T A1 min-max min-max min-max ΔKa (92ShA) (98ShA) (92ShA) (98ShA) J N J F n max Gw ft-lbs ft-lbs ft-lbs ft-lbs inch inch inch 10-3 lbs-in lbs-in 2 rpm lbs

36 Technical Information The principle of the spring-loaded form closure as an overload protection GERWAH Backlash-free Safety Couplings work as spring-loaded positive couplings. The special ball guide guarantees a totally backlash-free transmission of the torque in both directions of rotation. The couplings are therefore especially suitable for use in speed and direction-controlled drives in conjunction with a closed control loop. Constant loading of the balls guarantees high system stiffness, which is important especially for modern servo drives. At the same time the roller or ball guides guarantee high reliability and switching frequencies when used with high dynamic servo drives. In the event of an overload the balls move out of the guides. This results in an axial movement, which activates a proximity switch or limit switch that immediately makes contact to switch off the drive. To avoid damage to the safety coupling, the drive must be switched off immediately after an overload. GERWAH Backlash-free Safety Couplings were developed for especially dynamic drives operated under constantly changing directions of rotation and under high acceleration. The safety couplings exclusively work with specially selected disc springs with a pronounced degressive characteristic. This advantage guarantees shortest switching times (2 4 msec.) and a low residual torque, less than 5% in a disengaged state. The coupling disengages immediately when the disengagement torque is exceeded. The torque drops immediately to a small residual value, typically 2 to 5%. The switching work of our couplings corresponds to only a fraction of that of conventional safety couplings with progressive characteristic. This is a decisive advantage because even ultra-short surges in speed are rendered harmless by the safety coupling. Conventional Progressive characteristic Degressive characteristic Switching power As = f (x1) x S S = Disengaging travel S S 36

37 Technical Information Engaged T T max Degressive characteristic Disengaging travel T min Disengaged Dimensioning The load limits of our backlash-free safety couplings were determined in extensive series of tests. Two torque ranges are specified for every size. Optimal dimensioning from a technical and pricewise point of view is therefore possible. The cut-out torque defined by the user should lie approximately in the middle of the coupling s specified torque range. This allows correction of the cut-out torque, e.g. during commissioning. T (Torque) A Torque of disengagement B Torque of disengagement C Torque of disengagement Normal operating sector t (Time) 37

38 Technical Information Even large destructive forces have no chance! When determining the disengaging torque of the safety coupling, short peaks of torque of the drive assembly as well as of the machine need to be taken into account. GERWAH Safety Couplings have been developed for rapid interruption. We recommend paying special attention to the motor characteristics regarding the maximal acceleration torque. When using dynamic drives (servo motors), e.g. machine tools, we suggest to consider the influence of the moments of inertia. Since the acceleration torque in both positive and negative direction is usually much higher than the nominal moment, the sizing of the safety coupling and the disengaging torque level needs to be based on the maximum acceleration torque. T (Torque) Occuring max. driving torque Demolish high level forces are avoid Adjusted disengaging torque Normal operating range Residual torque (disengaged) t (period) JMot = Moment of inertia of motor JMasch = Moment of inertia of machine Tmax TA K = Max. acceleration torque = Cut-off (disengaging torque) of coupling = Load or impact factor A load/impact factor of K = 1,5-2 should be applied to servo drives in machine tools. A higher load factor should be used for extreme applications. For couplings on highly dynamic drives the following dimensioning values have proven reliable. Generally, the following equation applies. K K K = 1.5 (regular movements) = 2 (irregular movements) = (shock loads) TA = K Tmax JMasch JMot JMasch = [Nm] 38

39 Technical Information Functional principle, synchronizing engagement The special indentation geometry for the balls only allows the coupling to resume operation after an overload in a particular position, e.g. after 360. This system is used wherever synchronization after an overload is essential, e.g. for feeding equipment, for transfer stations, for automation systems. Adjusted torque of disengagement Operating torque Single position re-engagement T [Torque] t [Time] Functional principle, continuous engagement The indentation geometry for the balls is continuous. After an overload the safety coupling can resume operation in various positions. This system is used wherever synchronization after an overload is of no importance. Adjusted torque of disengagement Operating torque Multi position re-engagement T [Torque] t [Time] Functional principle activation, single position re-engagement coupling When the chosen limit is exceeded, the drive end and the output end will be separated automatically by the activation mechanism until the coupling re-engages. The re-engagement can be done by a re-engagement device or manually at the 360 angular position only after the overload has been removed. 39

40 Technical Information Functional principle activation re-engagement coupling Proximity sensor as mechanical limit switch When the chosen limit is exceeded, the drive end and the output end will be separated automatically by the activation mechanism until the coupling re-engages. The re-engagement can be done by a re-engagement device or manually at any angular position only after the overload has been removed. Functional principle interlocking coupling The interlocking system is equipped with a limit switch which signals overloads without interrupting the transmission of the torque when the chosen maximum torque is exceeded. Possible mechanical limit switch principles for all series. GERWAH Backlash-free Safety Couplings produce an axial movement (disengaging travel) of the outer cover or the ring in the event of an overload (see figure). This disengaging motion allows a proximity sensor or a mechanical limit switch to switch off the drive and simultaneously delivers an acoustical or optical signal. Backlash-free safety couplings are designed to allow direct mounting of a non-contact proximity switch or mechanical limit switch. T [Torque] Max. transmissible torque Opening function Adjusted torque of disengagement Operating torque t [Time] Forward direction / Disengaging travel S = approx. 1,2-2 mm 40

41 Technical Information Possible mechanical limit switch principles S S S 0,1mm S 0,1 mm 0,5 mm min. 1,5 mm max. 0,5 mm min. 1,5 mm max. Principle with mechanical limit switch Principle with proximity sensor Principle with outside proximity sensor Electrical schematics M 3 Schematic for the mechanical limit switch M 3 Schematic for the (exterior) proximity sensor Limit switch dimensions O12 16 Cable length 2m O CH PG = = O4, VAC/15A 24 VDC/6A IP-54 12, PG , VDC/6A IP-54 8O PG , VDC/6A IP-54 8O

42 Technical Information Misalignments Ka axial radial Kr angular Kw Fig.1 Shaft alignment Figure 1 shows the types of misalignment. Prior to mounting the coupling, both the coupling and the shafts must be aligned. The precision in aligning the shafts will determine the amount of reserves the coupling offers for compensation of misalignment occurring during operation. Well aligned shafts prolongue the life cycle of the coupling and help reducing the noise level of the drive. When more than one type of misalignment occur at once, each single type of misalignment must not reach the maximal value. Instead, they have to be balanced (see figure 2). Assembly Clean and degrease shaft ends and coupling bores and check tolerances. The max. clearance between shaft and hubs must not exceed inch. Slide coupling hubs onto shaft ends, check axial installation dimensions and tighten locking screws according to the tightening torque values shown in the technical data pages. Removal Loosen locking screws. When necessary, use the push-off threads to loosen the backlash-free connection. Should the shaft/hub connection not come loose, it is removable with a few steps. Please ask us for a detailed installation instruction or download from our website! 42

43 Technical Information Kw angular misalignment (%) Kr radial misalignment (%) % 25 % 0 % 20 75% Ka axial misalignment (%) Fig. 2 Metal Bellows Couplings Servo-Insert Couplings Size Bellows Misalignment Misalignments axial radial angular short/long DKa DKr DKw inch Degree 30 4 / / / / / / / / / / / / / / / / / / / / / / / / Misalignment Size Elastomer spider Shore scale Misalignments axial DKa radial DKr angular DKw inch Degree A A A A A

44 Fax Inquiry On this page please explain the planned application of a GERWAH Safety Coupling and we will propose our solution. Please send this page to: RINGFEDER POWER TRANSMISSION USA CORPORATION FAX: Application Planned use of the coupling (machine, machine group or plant): 2. Type of attachment (please tick/check) Clamping hub Flange mount Cone hub Outer cone Expanding hub Acc. customer request Hub with set screw 3. Dimensions Length (Inches) Bore D 1 (Inches) Keyway hub Outer diameter (Inches) Bore D 2 (Inches) Keyway hub 4. Shaft misalignment 5. Drive Axial (Inches) Radial (Inches) Angular (Degree) Drive power P = HP Input speed n = rpm Nominal torque of the drive Mt nom = lb-in Peak torque of the drive Mt maxx = lb-in Disengagement moment requested lb-in 6. Estimated demands Series Project Repair Number of items/p.a. 7. Environmental influences Temperature in the area of the coupling Temp = F Special materials (e.g. stainless steel) Are there any impacts on the load side? No Slight Medium Heavy Other, special influences 8. Mass moment of inertia 9. Target price On the drive side J A = lb-in 2 On the driven side J L = lb-in 2 $/ Each Please send your offer to: Company Attention Address Phone Fax 44

45 Notes 45

46 RINGFEDER POWER TRANSMISSION Locking Devices Locking Assemblies Locking Assemblies for bending moments Locking Assemblies Stainless steel Locking Elements Shrink Discs Flange Couplings Damping Technology Friction Springs DEFORM plus DEFORM plus R Couplings Torsionally Flexible Couplings Torsionally Flexible Couplings Torsionally Flexible Couplings Torsionally Rigid Gear Couplings Torsionally Rigid Barrel Coupling Couplings with variable Stiffness 46

47 Partner for Performance Couplings Flexible Couplings Henflex Hydrodynamic Couplings Henfluid Hydrodynamic Couplings with variable speed Bearing Housings Remark: HENFEL products are only available in South America and selected markets. Bearing Housings Couplings Metal Bellows Couplings Servo-Insert Couplings Safety Couplings Line Shafts Torsionally Rigid Disc Couplings 47

48 RINGFEDER POWER TRANSMISSION GMBH Werner-Heisenberg-Straße 18, D Groß-Umstadt, Germany Phone: +49 (0) Fax: +49 (0) RINGFEDER POWER TRANSMISSION TSCHAN GMBH Zweibrücker Strasse 104, D Neunkirchen, Germany Phone: +49 (0) Fax: +49 (0) RINGFEDER POWER TRANSMISSION USA CORPORATION 165 Carver Avenue, Westwood, NJ 07675, USA Toll Free: Phone: Fax: HENFEL INDÚSTRIA METALÚRGICA LTDA. Av. Major Hilário Tavares Pinheiro, 3447 Cer Jaboticabal - SP - Brazil Phone: Fax: vendas@henfel.com.br RINGFEDER POWER TRANSMISSION INDIA PRIVATE LIMITED Plot No. 4, Door No. 220, Mount - Poonamallee Road, Kattupakkam, Chennai , India Phone: +91 (0) Fax: +91 (0) sales.india@ringfeder.com KUNSHAN RINGFEDER POWER TRANSMISSION COMPANY LIMITED No. 10 Dexin Road, Zhangpu Town , Kunshan, China Phone: +86 (0) Fax: +86 (0) sales.china@ringfeder.com RINGFEDER POWER TRANSMISSION