Fo ew Technology etwok copoation R Insulated eaings MEGAOHM TM Seies
Insulated eaings MEGAOHM TM Seies : Offeing Enhanced Safety and Reliability eaings used in electical equipment such as motos and powe geneatos tend to exhibit electical pitting as a esult of cuent leakage. T's MEGAOHM TM Seies of insulated beaings has been specifically designed to counteact electical pitting. These beaings ae available in both ceamic and esin types suited to a vaiety of applications. The MEGAOHM TM Seies of insulated beaings offes the following unique advantages: Exhibits insulation esistance of at least MΩ at 0 VDC. Available in a wide ange of vaiants with vaious insulating laye mateials, high voltage esistance and shock iunity that accoodate divese use equiements. Compatible with ISO 9, DI 60 and JIS 151 standads. Available in boe diametes anging fom to 160. The Mechanism of Electical Pitting An electical cuent pesent nea a beaing can flow to the inside of the beaing, causing spaks that damage the olling contact suface. This phenomenon is known as "electical pitting." When such spaks fist occu, cicula spots can appea on the olling contact suface (Photo 1). The themal effects of the spaks can cause the metallugical composition and hadness in this poblematic aea to diffe fom those of the suounding nomal aeas, esulting in a white laye, hadened laye and tempeed laye. As a esult, the poblematic aea can eventually develop flaking. Futhemoe, if the electical pitting phenomenon pogesses, a cougation patten (Photo ) can develop that inceases unning noise and vibation. Consequently, the beaing can no longe adequately function. Photo 1 Photo White laye Hadened laye Tempeed laye 1 Photo Fig. 1
Insulated eaings MEGAOHM TM Seies Specifications Ceamic Insulated eaings Resin Insulated eaings Standad type eaing steel Potected type Insulating laye Oute ing Rolling element Inne ing Oute ing Rolling element Inne ing eaing steel Potecting laye Cylindical Rolle eaing Deep Goove all eaing Cylindical Rolle eaing Deep Goove all eaing eaing umbes Ceamic insulated beaings Resin insulated beaings 7MC-60MC Cleaance oe diamete Dimension seies eaing type 7MC: Potected ceamic laye type with high voltage esistance 7MC: Potected ceamic laye type 7MC: Standad type 7MP-U1L1CP6 Toleance Cleaance oe diamete Dimension seies eaing type 7MP: Standad esin type 7MP: Heat-dissipating and ceep-esistant esin type High voltage esistance 7MC 5kV 7MC kv 7MC kv 7MP 5kV 7MP 5kV ote: The insulated beaings MEGAOHM TM Seies includes a ange of high-tempeatue models. Fo technical assistance, contact T Engineeing. Pefomance The vaious featues of the insulated beaings MEGAOHM TM Seies ae suaized below. Choose the configuation that best suits you application. Ceamic Resin Ceamic Rolling Element (efeence) Insulation pefomance Ceep esistance Heat dissipation Shock iunity Pice Excellent omal Poo
Insulated eaings MEGAOHM TM Seies Dimension Tables fo Ceamic Insulated eaings 1 1 D d d d1 D d U Type H Type Cylindical olle beaing Deep goove ball beaing eaing types eaing numbes ounday dimensions d D s min asic load atings Dynamic C Static Co Colla ing numbes ounday dimensions Requied shoulde height Da d d1 1 1s min max min Cylindical olle beaing 7MC (n) -U1 7MC (n) -U1 7MC (n) -U16 7MC (n) -H18 7MC (n) -H0 7MC (n) -H 7MC (n) -U6 7MC (n)-u0 10 15 1 15 0 0 5 9 7 58 65 8 0 158 000 01 000 0 000 99 000 60 000 560 000 665 000 95 000 168 000 000 65 000 5 000 00 000 665 000 5 000 HJ18 HJ0 HJ 15 1 1 117 19 177 0 7 6 0 109 16.5 1. 16.8 1. 00.9 5.9 68.9 Deep goove ball beaing 7MC (n) -611 7MC (n) -61 7MC (n) -616 7MC (n) -6 7MC (n) -60 7MC (n) -60 55 60 10 10 10 60 0 9 1 9 55 5 65 71 0 8 000 1 000 07 000 176 000 7 000 5 000 5 000 86 0 185 000 168 000 8 000 111 119 7 57 0 10.5 11.6.7 5.6 0. 75.9 otes : Fo beaing cleaances and cage types, contact T Engineeing. The beaing numbes listed hee efe to cuent poducts. Fo beaings with othe numbes, contact T Engineeing. Requied shoulde height 7MCn 7MC: Potected ceamic laye type with high voltage esistance 7MC: Potected ceamic laye type 7MC: Standad type Da
Insulated eaings MEGAOHM TM Seies Dimension Tables fo Resin Insulated eaings 1 D d D d Cylindical olle beaing Deep goove ball beaing eaing types eaing numbes ounday dimensions asic load atings Requied shoulde Dynamic Static height Da d D s min C Co max Cylindical olle beaing 7MP-UP08 7MP-UP10 7MP-U1 7MP-U1 7MP-U15 7MP-U15 7MP-U16 7MP-U17 7MP-U1017 7MP-U19 7MP-U0 0 75 75 85 85 95 15 10 160 10 1 18 0 5 5 7 9 8 1.1 1.1 1.1 0 8 000 8 0 158 000 166 000 1 000 01 000 16 000 7 0 166 000 18 000 000 51 000 95 000 168 000 195 000 05 000 000 19 000 95 0 195 000 17 000 7.5 8.5 117 19 1 19 11 169 Deep goove ball beaing 7MP-610 7MP-611 7MP-61 7MP-61 7MP-615 7MP-616 7MP-617 7MP-618 7MP-619 7MP-619 7MP-60 7MP-6 7MP-600 55 60 75 85 95 95 10 10 10 1 00 15 0 5 7 9 1 5 5 9 8 5 7 5 6 000 71 0 8 000 10 000 66 000 1 000 8 0 1 000 109 000 15 000 17 000 05 000 16 000 8 0 5 000 5 000 68 000 9 0 86 0 6 000 107 000 8 000 119 000 11 000 179 000 16 000 101 111 119 19 1 11 177 187 0 7 1 otes : Fo beaing cleaances and cage types, contact T Engineeing. The beaing numbes listed hee efe to cuent poducts. Fo beaings with othe numbes, contact T Engineeing. Available only with a 7MP pefix.
Insulated eaings MEGAOHM TM Seies Typical Applications Electic Motos The insulated beaings MEGAOHM TM Seies is widely used in the taction motos of ailway cas. The unique knowledge and expeience T has gained fom moto applications in ailways- whee safety is the o. 1 pioity- have contibuted to the geatly impoved eliability of geneal-pupose motos. Taction motos Powe Geneatos The insulated beaings MEGAOHM TM Seies is also used in wind powe geneation systems, which ae one solution to enegy issues such as the pevention of global waming. These beaings contibute to the impoved eliability of eco-fiendly wind powe geneation systems. Geneato unit 5
Insulated eaings MEGAOHM TM Seies Opeating Pecautions To avoid an accident o failue esulting fom damage to insulated beaings, caefully obseve the following. eve dop an insulated beaing o stike it diectly with a hae duing installation (Illustations 1 and ). Do not use an insulated beaing if a defect is visible on the suface (Illustation ) o it has an unusual appeaance. Attaching an electical conducto to an insulated beaing can lowe the beaing s insulation esistance. To pevent cuent flow fom the side faces of a beaing, stictly obseve the mounting dimensions given in the dimension tables fo equied shoulde height. Poviding appoximately 15 of elief (illustated at ight) at the entance to the housing will facilitate assembly. Fo DC motos such as those used in ailway cas, eath-gound the shaft duing a voltage esistance test. 0.5 minimum 10 15 Relief at entance of housing boe Excessive shock can damage the insulating laye, possibly esulting in electical pitting. Electical pitting can in tun damage the beaing, leading to abnomal beaing pefomance and possible faulty opeation o failue. Illustation 1 Illustation Illustation 6