Classical Series Timing Belts
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- Suzan Collins
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1 Classical Series Timing s Classical Series Timing s are manufacture in 5 pitch sizes, X (/5), ( 3 / ), H ( / ), XH ( / ) an XXH ( / 4 ). Stanar stock lengths an withs are shown below, the XH an XXH Series being available to orer. lthough in many esigns Classical s have been replace by the new Parabolic s they are still preffere on some rives ue to lower cost, larger selection stock belts an pulleys an their suitability for low torque high spee applications. Special Construction s s for special applications can be prouce to orer in minimum batch sizes. nti- Static s: s conforming to BS 0 Stanar can be provie on all stanar belt sizes. These belts are for applications where static ischarges must be avoie, such as chemical plants, mines an oil refineries. High Temperature s: or applications in confine areas with elevate temperatures, these belts can operate at up to C. Oil Resistance s: or areas where belts coul be subject to frequent contact with lubricating oils. Stanar Stock Timing Sizes X Series - / 5 ength Coe X X X X X 9X X X X 0X X X 0X X X X X X X 0X X 00X 0X X X X Polychloroprene Backing ength o / 4 Wie 3/ Wie Cat. o Wt.gms Cat. o Wt.gms X 0 X 0 X 0 X 0 X 0 9X 0 X 0 X 0 X 0 0X 0 X 0 X 0 0X 0 X 0 X 0 X 0 X 0 X 0 X 0 0X 0 X 0 00X 0 0X 0 X 0 X 0 X 0 Polychloroprene ylon acing X 03 X 03 X 03 X 03 X 03 9X 03 X 03 X 03 X 03 0X 03 X 03 X 03 0X 03 X 03 X 03 X 03 X 03 X 03 X 03 0X 03 X 03 00X 03 0X 03 X 03 X 03 X 03 Tension ember Timing Construction The classical timing belt consists of four components. Cable Tension ember: continuous helically woun glass fibre cable is the loa carrying element at the heart of the belt. This tension member provies the belt with enormous tensile strength with a high level of flexibility. Polychloroprene Backing: thin, strong, wear resistant polychloroprene rubber sleeve is bone to the tension cable to provie a flexible protection. Polychloroprene : oule integral with the polychloroprene backing, mae of moerately har, shear resistant rubber compoun, the teeth are accurately forme an precisely space pulley engagement. ylon acing: tough, wear resistant nylon uck, with low coefficient of friction, protects the wearing surface of the teeth in the same manner as case harening protects the surface of steel. s with a combination of these features can also be offere. Groun Back s: ll belts supplie by Cross an orse have groun backs an uniform tension member to ensure smooth running. or very sensitive rives the belt thickness tolerance can be tightene from the stanar ± 0.6 to ± 0. (Class ) or even ± 0.5 (Class ). These belts provie improve accuracy of rive on positioning applications. Other an Withs of s: s can also be provie in pitch X, / inch pitch XH an / 4 inch pitch XXH, for replacement purposes. Withs up to moul turn (approx 0) can be supplie. The belts are stanar construction stock length an with sizes. Other pitches, withs, an special constructions can be supplie to orer. Special Constructions inclue: Groun-back s, Static Conuctive, Oil Resistant, High Temperature Resistant an Double Sie Construction. or further etails contact Cross & orse Technical Department. ength Coe 0X X X X X 0X X X 6X X 3X 36X 0X 3X 3X X 4X 0X 4X 3X 39X 4X 5X 0X X ength o / 4 Wie 3/ Wie Cat. o Wt.gms Cat. o Wt.gms 0X 0 X 0 X 0 X 0 X 0 0X 0 X 0 X 0 6X 0 X 0 3X 0 36X 0 0X 0 3X 0 3X 0 X 0 4X 0 0X 0 4X 0 3X 0 39X 0 4X 0 5X 0 0X 0 X X 03 X 03 X 03 X 03 X 03 0X 03 X 03 X 03 6X 03 X 03 3X 03 36X 03 0X 03 3X 03 3X 03 X 03 4X 03 0X 03 4X 03 3X 03 39X 03 4X 03 5X 03 0X 03 X T e l a x sale o ssmo rse. com 9 IDEX BCK EXT
2 Classical Series Timing s Stanar Stock Timing Sizes H Series - / ength Coe H H 0H 3H 3H 3H 0H 0H 0H 5H 0H 5H 0H 6H 6H 0H H H 0H H 0H 0H 00H 0H H H H 00H H ength Series - 3/ o ength Coe ength H 0 H 0 0H 0 3H 0 3H 0 3H 0 0H 0 0H 0 0H 0 5H 0 0H 0 5H 0 0H 0 6H 0 6H 0 0H 0 H 0 H 0 0H 0 H 0 0H 0 0H 0 00H 0 0H 0 H 0 H 0 H 0 00H 0 H 0 o / Wie 3 /4 Wie Wie Cat. o. Wt. gms. Cat. o. Wt. gms. Cat. o. Wt. gms H H 0H 3H 3H 3H 0H 0H 0H 5H 0H 5H 0H 6H 6H 0H H H 0H H 0H 0H 00H 0H H H H 00H H H H 0H 3H 3H 3H 0H 0H 0H 5H 0H 5H 0H 6H 6H 0H H H 0H H 0H 0H 00H 0H H H H 00H H / Wie Wie / Wie Wie 3 Wie Cat. o. Wt. gms. Cat. o. Wt. gms. Cat. o. Wt. gms. Cat. o. Wt. gms. Cat. o. Wt. gms. H 00 H 00 0H 00 3H 00 3H 00 3H 00 0H 00 0H 00 0H 00 5H 00 0H 00 5H 00 0H 00 6H 00 6H 00 0H 00 H 00 H 00 0H 00 H 00 0H 00 0H 00 00H 00 0H 00 H 00 H 00 H 00 00H 00 H H 0 H 0 0H 0 3H 0 3H 0 3H 0 0H 0 0H 0 0H 0 5H 0 0H 0 5H 0 0H 0 6H 0 6H 0 0H 0 H 0 H 0 0H 0 H 0 0H 0 0H 0 00H 0 0H 0 H 0 H 0 H 0 00H 0 H 0 The belts are stanar construction stock length an with sizes. Other pitches, withs, an special constructions can be supplie to orer. Special Constructions inclue: Groun-back s, Static Conuctive, Oil Resistant, High Temperature Resistant. or further etails contact Cross & orse Technical Department. Stanar s to XH an XXH formats can be supplie on short elivery time. Open Ene Classical Series s Open ene classical belts are available all sizes of classical belts for application on reciprocating rives, etc. ll belts operate on stanar pulleys an can be secure by clamping plates (page ) Cat. o With o. /etre Wt/etre gms St. ength X0E X03E X03E 0E 0E E H0E H0E HE X0 X03 X H0 H0 H m m m m m m m m m T e l a x sale o ssmo rse. com IDEX BCK EXT
3 Classical Series Timing s Double Sie Classical s Construction of these belts same as stanar Classical s, but with teeth on both sies of the belt. Both faces of belt have nylon facing for wear resistance. These belts enable riving of pulleys by both sies of belt. X Series Double Sie s - / 5 ength Coe X X 0X X X X X X X 0X X 00X 0X X X X 0X X X X ength o /4 Wie 3 / Wie Cat. o. Wt. gms. Cat. o. Wt. gms. Series Double Sie s - 3 / ength Coe ength o H Series Double Sie s - / ength Coe H H 0H 3H 3H 3H 0H 0H 0H 5H 0H 5H 0H 6H 6H 0H H H 0H H 0H 0H 00H 0H H H H 00H H ength X0DD X0DD 0X0DD X0DD X0DD X0DD X0DD X0DD X0DD 0X0DD X0DD 00X0DD 0X0DD X0DD X0DD X0DD 0X0DD X0DD X0DD X0DD o H0DD H0DD 0H0DD 3H0DD 3H0DD 3H0DD 0H0DD 0H0DD 0H0DD 5H0DD 0H0DD 5H0DD 0H0DD 6H0DD 6H0DD 0H0DD H0DD H0DD 0H0DD H0DD 0H0DD 0H0DD 00H0DD 0H0DD H0DD H0DD H0DD 00H0DD H0DD X0DD X03DD 0X03DD X03DD X03DD X03DD X03DD X03DD X03DD 0X03DD X03DD 00X03DD 0X03DD X03DD X03DD X03DD 0X03DD X03DD X03DD X03DD / Wie 3 /4 Wie Wie Cat. o. Wt. gms. Cat. o. Wt. gms. Cat. o. Wt. gms. 40DD 0DD DD 30DD 0DD 00DD 0DD 0DD 0DD 50DD 0DD 50DD 00DD 0DD 30DD 0DD 30DD 50DD 4DD 00DD 00DD 00DD 50DD 00DD 00DD 0DD 0DD HDD HDD 0HDD 3HDD 3HDD 3HDD 0HDD 0HDD 0HDD 5HDD 0HDD 5HDD 0HDD 6HDD 6HDD 0HDD HDD HDD 0HDD HDD 0HDD 0HDD 00HDD 0HDD HDD HDD HDD 00HDD HDD ength Coe X 0X X X 6X X 3X 36X 0X 3X 3X X 4X 0X 4X 3X 39X 4X 5X 0X 40DD 0DD DD 30DD 0DD 00DD 0DD 0DD 0DD 50DD 0DD 50DD 00DD 0DD 30DD 0DD 30DD 50DD 4DD 00DD 00DD 00DD 50DD 00DD 00DD 0DD 0DD ength HDD HDD 0HDD 3HDD 3HDD 3HDD 0HDD 0HDD 0HDD 5HDD 0HDD 5HDD 0HDD 6HDD 6HDD 0HDD HDD HDD 0HDD HDD 0HDD 0HDD 00HDD 0HDD HDD HDD HDD 00HDD HDD DD DD DD 3DD DD 0DD DD DD DD 5DD DD 5DD 0DD DD 3DD DD 3DD 5DD 4DD 0DD 0DD 0DD 5DD 0DD 0DD DD DD / Wie Wie / Wie Wie 3 Wie Cat. o. Wt. gms. Cat. o. Wt. gms. Cat. o. Wt. gms. Cat. o. Wt. gms. Cat. o. Wt. gms o /4 Wie 3 / Wie Cat. o. Wt. gms. Cat. o. Wt. gms. X0DD 0X0DD X0DD X0DD 6X0DD X0DD 3X0DD 36X0DD 0X0DD 3X0DD 3X0DD X0DD 4X0DD 0X0DD 4X0DD 3X0DD 39X0DD 4X0DD 5X0DD 0X0DD H00DD H00DD 0H00DD 3H00DD 3H00DD 3H00DD 0H00DD 0H00DD 0H00DD 5H00DD 0H00DD 5H00DD 0H00DD 6H00DD 6H00DD 0H00DD H00DD H00DD 0H00DD H00DD 0H00DD 0H00DD 00H00DD 0H00DD H00DD H00DD H00DD 00H00DD H00DD X03DD 0X03DD X03DD X03DD 6X03DD X03DD 3X03DD 36X03DD 0X03DD 3X03DD 3X03DD X03DD 4X03DD 0X03DD 4X03DD 3X03DD 39X03DD 4X03DD 5X03DD 0X03DD H0DD H0DD 0H0DD 3H0DD 3H0DD 3H0DD 0H0DD 0H0DD 0H0DD 5H0DD 0H0DD 5H0DD 0H0DD 6H0DD 6H0DD 0H0DD H0DD H0DD 0H0DD H0DD 0H0DD 0H0DD 00H0DD 0H0DD H0DD H0DD H0DD 00H0DD H0DD T e l a x sale o ssmo rse. com 3 IDEX BCK EXT
4 Classical Timing s Classical Timing s have evenly space grooves cut in their periphery, to make correct, positive engagement with the mating teeth of the belt. Cross & orse pulleys are manufacture with involute groove form to enable the teeth to enter an leave the pulley with negligible friction an minimum backlash. s are available in a number of stock withs an large selection of numbers of teeth to provie maximum versatility in rive selection. s for 3/ pitch, an / pitch H, rives are available with pilot bore for reworking to customers requirements or with taper bush for the complete off the shelf rive. ll pulleys are precision manufacture to close tolerances to ensure concentric running, an it is important when reworking stock pulleys to accurately locate on the outsie iameter to maintain concentricity. s of non-stanar withs or numbers of teeth can be supplie to orer, or alternately teeth can be cut on customers blanks. ll pulleys are manufacture in goo quality steel except for larger pulleys where cast iron is use (/5 pitch X are also available in aluminium. Generally pulleys up to teeth are supplie with two flanges to retain the timing belt. These flanges are accurately machine, presse onto the pulley boies an retaine by spin rivetting. Dimensions over an between flanges for stanar pulleys are inicate below. The imension over the flanges is generally the same as recoene with of tooth for unflange pulleys. E Catalogue o. X03 X03 X03 3X03 X03 5X03 6X03 X03 X03 X03 0X03 X03 X03 4X03 6X03 X03 X03 X03 X03 X03 X03 X03 X03 X03 X03 X03 X03 X03 X03 Size With Ref. With E min. o. /5 s for 3 / Wie s. Ref. X03 (/5 ) X X03 3/..3 Stanar s for X (/5 pitch) s Dia. 0 /.3.0 in. ax. (3/ ) (/ ) H 0 3/ H.0.0 H /.0.0 s available in both steel an aluminium. or steel a C to part number, for aluminium a. ll imensions in Outsie lange With ength Hub H Rim 6 H pprox T e l a x sale o ssmo rse. com IDEX BCK EXT
5 Plain s for Series Timing s Catalogue o. o. 3/ s for / wie s. Ref. 0 P0 P P30 P0 P50 P60 P0 P0 P0 P00 P P0 P30 P40 P0 P60 P0 P0 P0 P0 P0 P0 P0 P0 P0 P0 P0 P / s for 3/ 4 wie s. Ref. 0 P0 P P30 P0 P50 P60 P0 P0 P0 P00 P P0 P30 P40 P0 P60 P0 P0 P0 P0 P0 P0 P0 P0 P0 P0 P0 P / s for wie s. Ref. P P P3 P P5 P6 P P P P0 P P P3 P4 P P6 P P P P P P P P P P P P in. ax Outsie lange With ength Hub Rim pprox s The types referre to in tables are as rawings below. Suffix inicates pulley has flanges. below iviing line in tables are manufacture in cast iron. St. s can be reworke to customers bore an keyway requirements. aterial: Steel aterial: Cast Iron Webs have lightening holes aterial: Cast Iron Webs have lightening holes T e l a x sale o ssmo rse. com ll imensions in. Other sizes of s can be supplie on short elivery. ll s can be supplie finish bore an keywaye. Parallel bore pulleys can be machine an fitte with bearings for iler pulleys. When using pulleys as insie ilers it is recoene that number of teeth of iler shoul be more than that of smaller rive pulley. 33 IDEX BCK EXT
6 Plain s for H Series Timing s s The pulley types referre to in tables are as rawings below. The suffix inicates pulley has flanges. s below iviing line in tables are in Cast iron, an of spoke esign. St. s can be reworke to customers bore an keyway. aterial: Steel aterial: Cast Iron aterial: Cast Iron Catalogue o. PH P6H PH PH P0H PH PH P4H P6H PH PH PH PH PH PH PH PH PH PH PH PH o. Dia. / s for Wie s. Ref. H / s for / Wie s. Ref. H PH P6H PH PH P0H PH PH P4H P6H PH PH PH PH PH PH PH PH PH PH PH PH / s for Wie s. Ref. H00 PH00 P6H00 PH00 PH00 P0H00 PH00 PH00 P4H00 P6H00 PH00 PH00 PH00 PH00 PH00 PH00 PH00 PH00 PH00 PH00 PH00 PH / s for 3 Wie s. Ref. H0 PH0 P6H0 PH0 PH0 P0H0 PH0 PH0 P4H0 P6H0 PH0 PH0 PH0 PH0 PH0 PH0 PH0 PH0 PH0 PH0 PH0 PH in ax Other sizes of s can be supplie on short elivery. ll s can be supplie finish bore an keywaye. Outsie lange With ength Hub Rim pprox ll imensions in. T e l a x sale o ssmo rse. com IDEX BCK EXT
7 Taper s for Series Timing s Catalogue o o. 3 / s for / wie s. Ref / s for 3 / 4 wie s. Ref / s for wie s. Ref Taper Bush Size ax Outsie lange ll imensions in. or Taper Bush imensions refer page. With s types referre to in tables are as rawings below. The suffix inicates pulley has flanges. s below iviing line in tables are manufacture in cast iron. s, & when in cast iron have lightening holes. Installation Correct an accurate installation of Timing Drives is essential. alignment an shaft parallelism is very important as misalignment of the rive will cause unequal loaing across the belt with an ege wear of belt on flanges. alignment can be checke by placing a straight ege against the outsie ege of the pulleys an ajusting so contact mae evenly across both pulleys. The shaft shoul be locate within a rigi framework, as any istortion uner loa coul result in a reuction of centre istance which will cause jumping of belt on pulley teeth. If ilers are use they must be locke firmly into position after correct belt tensioning. Refer to page for aitional information on rive installation. ength Hub Rim pprox / T e l a x sale o ssmo rse. com IDEX BCK EXT
8 IDEX BCK EXT T e l a x sale o ssmo rse. com Taper s for H Series Timing s 6H H H 0H H H 3H 4H H 6H H H H H H H H H H H H H H Catalogue o. o. Taper Bush Size ax Outsie lange With ength Hub Rim / s for wie s. Ref. H pprox / s for / wie s. Ref. H H H 0H H H 3H 4H H 6H H H H H H H H H H H H H H / s for wie s. Ref. H00 H00 H00 0H00 H00 H00 3H00 4H00 H00 6H00 H00 H00 H00 H00 H00 H00 H00 H00 H00 H00 H00 H00 H / s for 3 wie s. Ref. H0 0H0 H0 H0 3H0 4H0 H0 6H0 H0 H0 H0 H0 H0 H0 H0 H0 H0 H0 H0 H ll imensions in. or etails of Taper Bushes refer to page. s / / / 3
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