2,5 mm x 7 mm x 3,5 mm SKF W 639/2.5 R-2ZS deep groove ball bearings cross reference by manufacturer | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| No. | Brand | d | D | B | C | H | d2 | D2 | B1 |
| Z-563933.04.DRGL | FAG | 400 mm | 1 030 mm | 315 mm | 315 mm | - | - | - | 444,5 mm |
| TV2639-1 | KOYO | 26 mm | 38,66 mm | - | 10,4 kN | 2 mm | - | - | - |
| W639/2-2Z | SKF | 2 mm | 6 mm | 3 mm | 0,19 kN | - | – mm | 0,15 mm | - |
| W639/2.5-2ZS | SKF | 2,5 mm | 7 mm | 3,5 mm | 0,221 kN | - | – mm | 0,15 mm | - |
| W639/3-2RS1 | SKF | 3 mm | 8 mm | 4 mm | 0,319 kN | - | – mm | 0,15 mm | - |
| W639/3-2Z | SKF | 3 mm | 8 mm | 4 mm | 0,319 kN | - | – mm | 0,15 mm | - |
| SF4639 | NTN | 230,000 mm | 300,000 mm | 35,000 mm | 35,000 mm | - | - | - | - |
| SF3639 | NTN | 180,000 mm | 259,500 mm | 33,000 mm | 33,000 mm | - | - | - | - |
| SF3639DB | NTN | 180,000 mm | 259,500 mm | 66,000 mm | 66,000 mm | - | - | - | - |
| 1639 | CYSD | 20,638 mm | 50,8 mm | 14,288 mm | 12,84 kN | - | - | - | - |
| 1639-2RS | CYSD | 20,638 mm | 50,8 mm | 14,288 mm | 12,84 kN | - | - | - | - |
| 4 mm x 16 mm x 5 mm ZEN S634-2RS deep groove ball bearings | Series:LM501300; Cone Part Number:LM501349HP; Cup Part Number:LM501310P; Design Units:Imperial; Bearing Weight:0.30 Kg; Cage Type:Stamped Steel; d:41.275 mm; D:73.431 mm; B - Cone Width:19.812 mm; C - Cup Width:14.732 mm; B:19.561 mm; R - Cone Backface To Clear Radius1:3.560 mm; r - Cup Backface To Clear Radius2:0.76 mm; da - Cone Frontface Backing Diameter:46.48 mm; db - Cone Backface Backing Diameter:53.09 mm; Da - Cup Frontface Backing Diameter:71.10 mm; Db - Cup Backface Backing Diameter:67.06 mm; Ab - Cage-Cone Frontface Clearance:1.8 mm; Aa - Cage-Cone Backface Clearance:0.3 mm; a - Effective Center Location3:-3.3 mm; C90 - Dynamic Radial Rating (90 million revolutions)4:4360 lbf; C1 - Dynamic Radial Rating (1 million revolutions)5:16800 lbf; C0 - Static Radial Rating:16700 lbf; Ca90 - Dynamic Thrust Rating (90 million revolutions)6:2980 lbf; K - Factor7:1.46; e - ISO Factor8:0.4; Y - ISO Factor9:1.5; G1 - Heat Generation Factor (Roller-Raceway):23.3; G2 - Heat Generation Factor (Rib-Roller End):13.3; Cg - Geometry Factor:0.0739; |
| 45 mm x 85 mm x 19 mm SKF 6209-2RZTN9/HC5C3WT deep groove ball bearings | Series:LM501300; Cone Part Number:LM501349HP; Cup Part Number:LM501310P; Design Units:Imperial; Bearing Weight:0.30 Kg; Cage Type:Stamped Steel; d:41.275 mm; D:73.431 mm; B - Cone Width:19.812 mm; C - Cup Width:14.732 mm; B:19.561 mm; R - Cone Backface To Clear Radius1:3.560 mm; r - Cup Backface To Clear Radius2:0.76 mm; da - Cone Frontface Backing Diameter:46.48 mm; db - Cone Backface Backing Diameter:53.09 mm; Da - Cup Frontface Backing Diameter:71.10 mm; Db - Cup Backface Backing Diameter:67.06 mm; Ab - Cage-Cone Frontface Clearance:1.8 mm; Aa - Cage-Cone Backface Clearance:0.3 mm; a - Effective Center Location3:-3.3 mm; C90 - Dynamic Radial Rating (90 million revolutions)4:4360 lbf; C1 - Dynamic Radial Rating (1 million revolutions)5:16800 lbf; C0 - Static Radial Rating:16700 lbf; Ca90 - Dynamic Thrust Rating (90 million revolutions)6:2980 lbf; K - Factor7:1.46; e - ISO Factor8:0.4; Y - ISO Factor9:1.5; G1 - Heat Generation Factor (Roller-Raceway):23.3; G2 - Heat Generation Factor (Rib-Roller End):13.3; Cg - Geometry Factor:0.0739; |
| 130 mm x 200 mm x 22 mm NTN 16026 deep groove ball bearings | Series:LM501300; Cone Part Number:LM501349HP; Cup Part Number:LM501310P; Design Units:Imperial; Bearing Weight:0.30 Kg; Cage Type:Stamped Steel; d:41.275 mm; D:73.431 mm; B - Cone Width:19.812 mm; C - Cup Width:14.732 mm; B:19.561 mm; R - Cone Backface To Clear Radius1:3.560 mm; r - Cup Backface To Clear Radius2:0.76 mm; da - Cone Frontface Backing Diameter:46.48 mm; db - Cone Backface Backing Diameter:53.09 mm; Da - Cup Frontface Backing Diameter:71.10 mm; Db - Cup Backface Backing Diameter:67.06 mm; Ab - Cage-Cone Frontface Clearance:1.8 mm; Aa - Cage-Cone Backface Clearance:0.3 mm; a - Effective Center Location3:-3.3 mm; C90 - Dynamic Radial Rating (90 million revolutions)4:4360 lbf; C1 - Dynamic Radial Rating (1 million revolutions)5:16800 lbf; C0 - Static Radial Rating:16700 lbf; Ca90 - Dynamic Thrust Rating (90 million revolutions)6:2980 lbf; K - Factor7:1.46; e - ISO Factor8:0.4; Y - ISO Factor9:1.5; G1 - Heat Generation Factor (Roller-Raceway):23.3; G2 - Heat Generation Factor (Rib-Roller End):13.3; Cg - Geometry Factor:0.0739; |
| 28 mm x 78 mm x 20 mm NTN SC0690V1 deep groove ball bearings | Series:LM501300; Cone Part Number:LM501349HP; Cup Part Number:LM501310P; Design Units:Imperial; Bearing Weight:0.30 Kg; Cage Type:Stamped Steel; d:41.275 mm; D:73.431 mm; B - Cone Width:19.812 mm; C - Cup Width:14.732 mm; B:19.561 mm; R - Cone Backface To Clear Radius1:3.560 mm; r - Cup Backface To Clear Radius2:0.76 mm; da - Cone Frontface Backing Diameter:46.48 mm; db - Cone Backface Backing Diameter:53.09 mm; Da - Cup Frontface Backing Diameter:71.10 mm; Db - Cup Backface Backing Diameter:67.06 mm; Ab - Cage-Cone Frontface Clearance:1.8 mm; Aa - Cage-Cone Backface Clearance:0.3 mm; a - Effective Center Location3:-3.3 mm; C90 - Dynamic Radial Rating (90 million revolutions)4:4360 lbf; C1 - Dynamic Radial Rating (1 million revolutions)5:16800 lbf; C0 - Static Radial Rating:16700 lbf; Ca90 - Dynamic Thrust Rating (90 million revolutions)6:2980 lbf; K - Factor7:1.46; e - ISO Factor8:0.4; Y - ISO Factor9:1.5; G1 - Heat Generation Factor (Roller-Raceway):23.3; G2 - Heat Generation Factor (Rib-Roller End):13.3; Cg - Geometry Factor:0.0739; |
| 45 mm x 75 mm x 16 mm ZEN S6009 deep groove ball bearings | Series:LM501300; Cone Part Number:LM501349HP; Cup Part Number:LM501310P; Design Units:Imperial; Bearing Weight:0.30 Kg; Cage Type:Stamped Steel; d:41.275 mm; D:73.431 mm; B - Cone Width:19.812 mm; C - Cup Width:14.732 mm; B:19.561 mm; R - Cone Backface To Clear Radius1:3.560 mm; r - Cup Backface To Clear Radius2:0.76 mm; da - Cone Frontface Backing Diameter:46.48 mm; db - Cone Backface Backing Diameter:53.09 mm; Da - Cup Frontface Backing Diameter:71.10 mm; Db - Cup Backface Backing Diameter:67.06 mm; Ab - Cage-Cone Frontface Clearance:1.8 mm; Aa - Cage-Cone Backface Clearance:0.3 mm; a - Effective Center Location3:-3.3 mm; C90 - Dynamic Radial Rating (90 million revolutions)4:4360 lbf; C1 - Dynamic Radial Rating (1 million revolutions)5:16800 lbf; C0 - Static Radial Rating:16700 lbf; Ca90 - Dynamic Thrust Rating (90 million revolutions)6:2980 lbf; K - Factor7:1.46; e - ISO Factor8:0.4; Y - ISO Factor9:1.5; G1 - Heat Generation Factor (Roller-Raceway):23.3; G2 - Heat Generation Factor (Rib-Roller End):13.3; Cg - Geometry Factor:0.0739; |
| 4 mm x 9 mm x 2,5 mm ISO FL618/4 deep groove ball bearings | Series:LM501300; Cone Part Number:LM501349HP; Cup Part Number:LM501310P; Design Units:Imperial; Bearing Weight:0.30 Kg; Cage Type:Stamped Steel; d:41.275 mm; D:73.431 mm; B - Cone Width:19.812 mm; C - Cup Width:14.732 mm; B:19.561 mm; R - Cone Backface To Clear Radius1:3.560 mm; r - Cup Backface To Clear Radius2:0.76 mm; da - Cone Frontface Backing Diameter:46.48 mm; db - Cone Backface Backing Diameter:53.09 mm; Da - Cup Frontface Backing Diameter:71.10 mm; Db - Cup Backface Backing Diameter:67.06 mm; Ab - Cage-Cone Frontface Clearance:1.8 mm; Aa - Cage-Cone Backface Clearance:0.3 mm; a - Effective Center Location3:-3.3 mm; C90 - Dynamic Radial Rating (90 million revolutions)4:4360 lbf; C1 - Dynamic Radial Rating (1 million revolutions)5:16800 lbf; C0 - Static Radial Rating:16700 lbf; Ca90 - Dynamic Thrust Rating (90 million revolutions)6:2980 lbf; K - Factor7:1.46; e - ISO Factor8:0.4; Y - ISO Factor9:1.5; G1 - Heat Generation Factor (Roller-Raceway):23.3; G2 - Heat Generation Factor (Rib-Roller End):13.3; Cg - Geometry Factor:0.0739; |
| 10 inch x 273,05 mm x 9,525 mm INA CSXC100 deep groove ball bearings | Series:LM501300; Cone Part Number:LM501349HP; Cup Part Number:LM501310P; Design Units:Imperial; Bearing Weight:0.30 Kg; Cage Type:Stamped Steel; d:41.275 mm; D:73.431 mm; B - Cone Width:19.812 mm; C - Cup Width:14.732 mm; B:19.561 mm; R - Cone Backface To Clear Radius1:3.560 mm; r - Cup Backface To Clear Radius2:0.76 mm; da - Cone Frontface Backing Diameter:46.48 mm; db - Cone Backface Backing Diameter:53.09 mm; Da - Cup Frontface Backing Diameter:71.10 mm; Db - Cup Backface Backing Diameter:67.06 mm; Ab - Cage-Cone Frontface Clearance:1.8 mm; Aa - Cage-Cone Backface Clearance:0.3 mm; a - Effective Center Location3:-3.3 mm; C90 - Dynamic Radial Rating (90 million revolutions)4:4360 lbf; C1 - Dynamic Radial Rating (1 million revolutions)5:16800 lbf; C0 - Static Radial Rating:16700 lbf; Ca90 - Dynamic Thrust Rating (90 million revolutions)6:2980 lbf; K - Factor7:1.46; e - ISO Factor8:0.4; Y - ISO Factor9:1.5; G1 - Heat Generation Factor (Roller-Raceway):23.3; G2 - Heat Generation Factor (Rib-Roller End):13.3; Cg - Geometry Factor:0.0739; |
| 55,5625 mm x 120 mm x 65 mm SNR UK213+H-35 deep groove ball bearings | Series:LM501300; Cone Part Number:LM501349HP; Cup Part Number:LM501310P; Design Units:Imperial; Bearing Weight:0.30 Kg; Cage Type:Stamped Steel; d:41.275 mm; D:73.431 mm; B - Cone Width:19.812 mm; C - Cup Width:14.732 mm; B:19.561 mm; R - Cone Backface To Clear Radius1:3.560 mm; r - Cup Backface To Clear Radius2:0.76 mm; da - Cone Frontface Backing Diameter:46.48 mm; db - Cone Backface Backing Diameter:53.09 mm; Da - Cup Frontface Backing Diameter:71.10 mm; Db - Cup Backface Backing Diameter:67.06 mm; Ab - Cage-Cone Frontface Clearance:1.8 mm; Aa - Cage-Cone Backface Clearance:0.3 mm; a - Effective Center Location3:-3.3 mm; C90 - Dynamic Radial Rating (90 million revolutions)4:4360 lbf; C1 - Dynamic Radial Rating (1 million revolutions)5:16800 lbf; C0 - Static Radial Rating:16700 lbf; Ca90 - Dynamic Thrust Rating (90 million revolutions)6:2980 lbf; K - Factor7:1.46; e - ISO Factor8:0.4; Y - ISO Factor9:1.5; G1 - Heat Generation Factor (Roller-Raceway):23.3; G2 - Heat Generation Factor (Rib-Roller End):13.3; Cg - Geometry Factor:0.0739; |
| 3,967 mm x 7,938 mm x 2,779 mm ISO R155 deep groove ball bearings | Series:LM501300; Cone Part Number:LM501349HP; Cup Part Number:LM501310P; Design Units:Imperial; Bearing Weight:0.30 Kg; Cage Type:Stamped Steel; d:41.275 mm; D:73.431 mm; B - Cone Width:19.812 mm; C - Cup Width:14.732 mm; B:19.561 mm; R - Cone Backface To Clear Radius1:3.560 mm; r - Cup Backface To Clear Radius2:0.76 mm; da - Cone Frontface Backing Diameter:46.48 mm; db - Cone Backface Backing Diameter:53.09 mm; Da - Cup Frontface Backing Diameter:71.10 mm; Db - Cup Backface Backing Diameter:67.06 mm; Ab - Cage-Cone Frontface Clearance:1.8 mm; Aa - Cage-Cone Backface Clearance:0.3 mm; a - Effective Center Location3:-3.3 mm; C90 - Dynamic Radial Rating (90 million revolutions)4:4360 lbf; C1 - Dynamic Radial Rating (1 million revolutions)5:16800 lbf; C0 - Static Radial Rating:16700 lbf; Ca90 - Dynamic Thrust Rating (90 million revolutions)6:2980 lbf; K - Factor7:1.46; e - ISO Factor8:0.4; Y - ISO Factor9:1.5; G1 - Heat Generation Factor (Roller-Raceway):23.3; G2 - Heat Generation Factor (Rib-Roller End):13.3; Cg - Geometry Factor:0.0739; |
| 70 mm x 110 mm x 20 mm Fersa 6014 deep groove ball bearings | Series:LM501300; Cone Part Number:LM501349HP; Cup Part Number:LM501310P; Design Units:Imperial; Bearing Weight:0.30 Kg; Cage Type:Stamped Steel; d:41.275 mm; D:73.431 mm; B - Cone Width:19.812 mm; C - Cup Width:14.732 mm; B:19.561 mm; R - Cone Backface To Clear Radius1:3.560 mm; r - Cup Backface To Clear Radius2:0.76 mm; da - Cone Frontface Backing Diameter:46.48 mm; db - Cone Backface Backing Diameter:53.09 mm; Da - Cup Frontface Backing Diameter:71.10 mm; Db - Cup Backface Backing Diameter:67.06 mm; Ab - Cage-Cone Frontface Clearance:1.8 mm; Aa - Cage-Cone Backface Clearance:0.3 mm; a - Effective Center Location3:-3.3 mm; C90 - Dynamic Radial Rating (90 million revolutions)4:4360 lbf; C1 - Dynamic Radial Rating (1 million revolutions)5:16800 lbf; C0 - Static Radial Rating:16700 lbf; Ca90 - Dynamic Thrust Rating (90 million revolutions)6:2980 lbf; K - Factor7:1.46; e - ISO Factor8:0.4; Y - ISO Factor9:1.5; G1 - Heat Generation Factor (Roller-Raceway):23.3; G2 - Heat Generation Factor (Rib-Roller End):13.3; Cg - Geometry Factor:0.0739; |
| 17 mm x 35 mm x 10 mm KOYO 3NC6003HT4 GF deep groove ball bearings | Series:LM501300; Cone Part Number:LM501349HP; Cup Part Number:LM501310P; Design Units:Imperial; Bearing Weight:0.30 Kg; Cage Type:Stamped Steel; d:41.275 mm; D:73.431 mm; B - Cone Width:19.812 mm; C - Cup Width:14.732 mm; B:19.561 mm; R - Cone Backface To Clear Radius1:3.560 mm; r - Cup Backface To Clear Radius2:0.76 mm; da - Cone Frontface Backing Diameter:46.48 mm; db - Cone Backface Backing Diameter:53.09 mm; Da - Cup Frontface Backing Diameter:71.10 mm; Db - Cup Backface Backing Diameter:67.06 mm; Ab - Cage-Cone Frontface Clearance:1.8 mm; Aa - Cage-Cone Backface Clearance:0.3 mm; a - Effective Center Location3:-3.3 mm; C90 - Dynamic Radial Rating (90 million revolutions)4:4360 lbf; C1 - Dynamic Radial Rating (1 million revolutions)5:16800 lbf; C0 - Static Radial Rating:16700 lbf; Ca90 - Dynamic Thrust Rating (90 million revolutions)6:2980 lbf; K - Factor7:1.46; e - ISO Factor8:0.4; Y - ISO Factor9:1.5; G1 - Heat Generation Factor (Roller-Raceway):23.3; G2 - Heat Generation Factor (Rib-Roller End):13.3; Cg - Geometry Factor:0.0739; |
| 45 mm x 100 mm x 25 mm NTN 6309LLB deep groove ball bearings | Series:LM501300; Cone Part Number:LM501349HP; Cup Part Number:LM501310P; Design Units:Imperial; Bearing Weight:0.30 Kg; Cage Type:Stamped Steel; d:41.275 mm; D:73.431 mm; B - Cone Width:19.812 mm; C - Cup Width:14.732 mm; B:19.561 mm; R - Cone Backface To Clear Radius1:3.560 mm; r - Cup Backface To Clear Radius2:0.76 mm; da - Cone Frontface Backing Diameter:46.48 mm; db - Cone Backface Backing Diameter:53.09 mm; Da - Cup Frontface Backing Diameter:71.10 mm; Db - Cup Backface Backing Diameter:67.06 mm; Ab - Cage-Cone Frontface Clearance:1.8 mm; Aa - Cage-Cone Backface Clearance:0.3 mm; a - Effective Center Location3:-3.3 mm; C90 - Dynamic Radial Rating (90 million revolutions)4:4360 lbf; C1 - Dynamic Radial Rating (1 million revolutions)5:16800 lbf; C0 - Static Radial Rating:16700 lbf; Ca90 - Dynamic Thrust Rating (90 million revolutions)6:2980 lbf; K - Factor7:1.46; e - ISO Factor8:0.4; Y - ISO Factor9:1.5; G1 - Heat Generation Factor (Roller-Raceway):23.3; G2 - Heat Generation Factor (Rib-Roller End):13.3; Cg - Geometry Factor:0.0739; |
| 25 mm x 68 mm x 12 mm NTN 3TM-SC05B31CS37 deep groove ball bearings | Series:LM501300; Cone Part Number:LM501349HP; Cup Part Number:LM501310P; Design Units:Imperial; Bearing Weight:0.30 Kg; Cage Type:Stamped Steel; d:41.275 mm; D:73.431 mm; B - Cone Width:19.812 mm; C - Cup Width:14.732 mm; B:19.561 mm; R - Cone Backface To Clear Radius1:3.560 mm; r - Cup Backface To Clear Radius2:0.76 mm; da - Cone Frontface Backing Diameter:46.48 mm; db - Cone Backface Backing Diameter:53.09 mm; Da - Cup Frontface Backing Diameter:71.10 mm; Db - Cup Backface Backing Diameter:67.06 mm; Ab - Cage-Cone Frontface Clearance:1.8 mm; Aa - Cage-Cone Backface Clearance:0.3 mm; a - Effective Center Location3:-3.3 mm; C90 - Dynamic Radial Rating (90 million revolutions)4:4360 lbf; C1 - Dynamic Radial Rating (1 million revolutions)5:16800 lbf; C0 - Static Radial Rating:16700 lbf; Ca90 - Dynamic Thrust Rating (90 million revolutions)6:2980 lbf; K - Factor7:1.46; e - ISO Factor8:0.4; Y - ISO Factor9:1.5; G1 - Heat Generation Factor (Roller-Raceway):23.3; G2 - Heat Generation Factor (Rib-Roller End):13.3; Cg - Geometry Factor:0.0739; |
| 30 mm x 62 mm x 38,1 mm SKF YAR206-2RF deep groove ball bearings | Series:LM501300; Cone Part Number:LM501349HP; Cup Part Number:LM501310P; Design Units:Imperial; Bearing Weight:0.30 Kg; Cage Type:Stamped Steel; d:41.275 mm; D:73.431 mm; B - Cone Width:19.812 mm; C - Cup Width:14.732 mm; B:19.561 mm; R - Cone Backface To Clear Radius1:3.560 mm; r - Cup Backface To Clear Radius2:0.76 mm; da - Cone Frontface Backing Diameter:46.48 mm; db - Cone Backface Backing Diameter:53.09 mm; Da - Cup Frontface Backing Diameter:71.10 mm; Db - Cup Backface Backing Diameter:67.06 mm; Ab - Cage-Cone Frontface Clearance:1.8 mm; Aa - Cage-Cone Backface Clearance:0.3 mm; a - Effective Center Location3:-3.3 mm; C90 - Dynamic Radial Rating (90 million revolutions)4:4360 lbf; C1 - Dynamic Radial Rating (1 million revolutions)5:16800 lbf; C0 - Static Radial Rating:16700 lbf; Ca90 - Dynamic Thrust Rating (90 million revolutions)6:2980 lbf; K - Factor7:1.46; e - ISO Factor8:0.4; Y - ISO Factor9:1.5; G1 - Heat Generation Factor (Roller-Raceway):23.3; G2 - Heat Generation Factor (Rib-Roller End):13.3; Cg - Geometry Factor:0.0739; |
2,5 mm x 7 mm x 3,5 mm SKF W 639/2.5 R-2ZS deep groove ball bearings Video
W 639/2.5 R-2ZS - SKF
Deep groove ball bearings
Deep groove ball bearings - W 639/2.5 R-2ZS - SKF
d, 2.5, mm. D, 7, mm. B, 3.5, mm. d1, ≈, 3.85, mm. D2, ≈, 6.2, mm. D3, 8.5, mm. C, 0.9, mm. r1,2, min. 0.15, mm. Abutment dimensions. da, min. 3.7, mm. da, max
SKF W 639/2.5 R-2ZS - ball bearings，roller bearings
SKF W 639/2.5 R-2ZS Deep groove ball bearings, Dimensionsd 2.5mmD 7mmB 3.5mmd1≈3.85mmD2≈6.2mmD3 8.5mmC 0.9mmr1,2min.0.15mmAbutment
W 639/2.5-2ZS - SKF bearing
Model Number: W 639/2.5-2ZS; Inner Diameter：2.5mm Outer Diameter：7mm Width：3.5mm; Reference speed:80000 r/min Limiting speed:160000 r/min
W 639/2.5 R-2ZS | Online Catalog | Bearings | Products | NOC
Deep groove ball bearings. Single row, without filling slot. Complete. SKF W 639/2.5 R-2ZS, W-639/2.5-R-2ZS, W639/2.5R-2ZS, W63925R2ZS
Excellent Quality | SKF W 639/2.5 R-2ZS Bearing | SKF Bearings
As SKF bearing distributor, BEST Bearings have SKF W 639/2.5 R-2ZS in stock. If you want to confirm some technical details before you order, just need to send
Bearing W 639/2.5 R-2ZS (SKF) | Size and Specification
Deep groove ball bearings W 639/2.5 R-2ZS dimensions and specification
2,5 mm x 7 mm x 3,5 mm 2,5 mm x 7 mm x 3,5 mm SKF W 639
What are the types of 2,5 mm x 7 mm x 3,5 mm 2,5 mm x 7 mm x 3,5 mm SKF W 639/2.5 R-2ZS deep groove ball bearings 2,5 mm x 7 mm x 3,5 mm ?