W Series Stainless Steel Miniature Bearings

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W Series Stainless Steel Miniature Bearings

The W Series (Miniature Plain) caters to precision micro-engineering tasks where a flange is unnecessary. These stainless steel bearings provide high-speed capabilities and corrosion resistance in a small imperial package. They are commonly found in precision sensors, micro-actuators, and high-end consumer electronics.

Bore diameter
1 mm 1.5 mm 2 mm 2.5 mm 3 mm 4 mm 5 mm 6 mm 7 mm 8 mm 9 mm
Outside diameter
3 mm 4 mm 5 mm 6 mm 7 mm 8 mm 9 mm 10 mm 11 mm 12 mm 13 mm 14 mm 15 mm 16 mm 17 mm 19 mm 20 mm 22 mm 24 mm 26 mm 28 mm 30 mm
Width
1 mm 1.2 mm 1.5 mm 1.6 mm 1.8 mm 2 mm 2.3 mm 2.5 mm 2.6 mm 2.8 mm 3 mm 3.5 mm 4 mm 5 mm 6 mm 7 mm 8 mm 9 mm 10 mm
Seal type
Open Sealed Shielded
Cage material
Chrome Steel Stainless Steel
Limiting speed
16 X 1000 rpm 19 X 1000 rpm 20 X 1000 rpm 22 X 1000 rpm 24 X 1000 rpm 26 X 1000 rpm 28 X 1000 rpm 30 X 1000 rpm 32 X 1000 rpm 34 X 1000 rpm 36 X 1000 rpm 38 X 1000 rpm 40 X 1000 rpm 43 X 1000 rpm 45 X 1000 rpm 48 X 1000 rpm 50 X 1000 rpm 53 X 1000 rpm 56 X 1000 rpm 60 X 1000 rpm 63 X 1000 rpm 67 X 1000 rpm 70 X 1000 rpm 75 X 1000 rpm 80 X 1000 rpm 85 X 1000 rpm 90 X 1000 rpm 95 X 1000 rpm 100 X 1000 rpm 110 X 1000 rpm 120 X 1000 rpm 130 X 1000 rpm 140 X 1000 rpm 150 X 1000 rpm
Radial dynamic load rating
12 lbf 14 lbf 15 lbf 18 lbf 21 lbf 26 lbf 27 lbf 30 lbf 32 lbf 39 lbf 40 lbf 43 lbf 50 lbf 51 lbf 56 lbf 58 lbf 64 lbf 70 lbf 72 lbf 73 lbf 80 lbf 82 lbf 91 lbf 104 lbf 117 lbf 121 lbf 124 lbf 139 lbf 149 lbf 161 lbf 167 lbf 171 lbf 207 lbf 281 lbf 321 lbf 344 lbf 438 lbf 447 lbf 456 lbf 555 lbf 892 lbf 980 lbf
Radial static load rating
3 lbf 4 lbf 6 lbf 8 lbf 10 lbf 11 lbf 12 lbf 13 lbf 14 lbf 15 lbf 16 lbf 19 lbf 20 lbf 21 lbf 23 lbf 25 lbf 26 lbf 31 lbf 32 lbf 33 lbf 40 lbf 43 lbf 50 lbf 53 lbf 55 lbf 56 lbf 58 lbf 60 lbf 67 lbf 75 lbf 82 lbf 102 lbf 132 lbf 142 lbf 175 lbf 183 lbf 187 lbf 198 lbf 209 lbf 252 lbf 441 lbf 522 lbf
Part Number Bore diameter Outside diameter Width For load direction Seal type Ring material Ball material Radial dynamic load rating Radial static load rating Limiting speed
W 619/6-2Z 6 mm 15 mm 5 mm Radial Shielded Stainless Steel Stainless Steel 171 lbf 60 lbf 50 X 1000 rpm
W 619/6 X-2RS1 6 mm 16 mm 5 mm Radial Sealed Stainless Steel Stainless Steel 171 lbf 60 lbf 30 X 1000 rpm
W 619/6 X-2Z 6 mm 16 mm 5 mm Radial Shielded Stainless Steel Stainless Steel 171 lbf 60 lbf 50 X 1000 rpm
W 606 6 mm 17 mm 6 mm Radial Open Stainless Steel Stainless Steel 438 lbf 187 lbf 60 X 1000 rpm
W 606-2RS1 6 mm 17 mm 6 mm Radial Sealed Stainless Steel Stainless Steel 438 lbf 187 lbf 26 X 1000 rpm
W 606-2Z 6 mm 17 mm 6 mm Radial Shielded Stainless Steel Stainless Steel 438 lbf 187 lbf 48 X 1000 rpm
W 626 6 mm 19 mm 6 mm Radial Open Stainless Steel Stainless Steel 344 lbf 132 lbf 56 X 1000 rpm
W 626/W64 6 mm 19 mm 6 mm Radial Open Stainless Steel Stainless Steel 344 lbf 132 lbf 56 X 1000 rpm
W 626-2RS1 6 mm 19 mm 6 mm Radial Sealed Stainless Steel Stainless Steel 344 lbf 132 lbf 24 X 1000 rpm
W 626-2RS1/VT378 6 mm 19 mm 6 mm Radial Sealed Stainless Steel Stainless Steel 344 lbf 132 lbf 56 X 1000 rpm
W 626-2RS1/W64 6 mm 19 mm 6 mm Radial Sealed Stainless Steel Stainless Steel 344 lbf 132 lbf 56 X 1000 rpm
W 626-2RS1/W64F 6 mm 19 mm 6 mm Radial Sealed Stainless Steel Stainless Steel 344 lbf 132 lbf 56 X 1000 rpm
W 626-2Z 6 mm 19 mm 6 mm Radial Shielded Stainless Steel Stainless Steel 344 lbf 132 lbf 43 X 1000 rpm
W 636 6 mm 22 mm 7 mm Radial Open Stainless Steel Stainless Steel 447 lbf 175 lbf 48 X 1000 rpm
W 636-2RS1 6 mm 22 mm 7 mm Radial Sealed Stainless Steel Stainless Steel 447 lbf 175 lbf 22 X 1000 rpm
W 636-2Z 6 mm 22 mm 7 mm Radial Shielded Stainless Steel Stainless Steel 447 lbf 175 lbf 38 X 1000 rpm
W 617/7 7 mm 11 mm 2.5 mm Radial Open Stainless Steel Stainless Steel 58 lbf 23 lbf 70 X 1000 rpm
W 627 X 7 mm 13 mm 3 mm Radial Open Stainless Steel Stainless Steel 70 lbf 32 lbf 63 X 1000 rpm
W 618/7 7 mm 14 mm 3.5 mm Radial Open Stainless Steel Stainless Steel 149 lbf 58 lbf 63 X 1000 rpm
W 628/7-2RS1 7 mm 14 mm 5 mm Radial Sealed Stainless Steel Stainless Steel 149 lbf 58 lbf 28 X 1000 rpm
W 628/7-2Z 7 mm 14 mm 5 mm Radial Shielded Stainless Steel Stainless Steel 149 lbf 58 lbf 50 X 1000 rpm
W 619/7 7 mm 17 mm 5 mm Radial Open Stainless Steel Stainless Steel 207 lbf 82 lbf 56 X 1000 rpm
W 619/7-2RS1 7 mm 17 mm 5 mm Radial Sealed Stainless Steel Stainless Steel 207 lbf 82 lbf 26 X 1000 rpm
W 619/7-2Z 7 mm 17 mm 5 mm Radial Shielded Stainless Steel Stainless Steel 207 lbf 82 lbf 45 X 1000 rpm
W 607 7 mm 19 mm 6 mm Radial Open Stainless Steel Stainless Steel 344 lbf 132 lbf 56 X 1000 rpm
W 607-2RS1 7 mm 19 mm 6 mm Radial Sealed Stainless Steel Stainless Steel 344 lbf 132 lbf 24 X 1000 rpm
W 607-2RS1/VT378 7 mm 19 mm 6 mm Radial Sealed Stainless Steel Stainless Steel 344 lbf 132 lbf 56 X 1000 rpm
W 607-2RS1/W64F 7 mm 19 mm 6 mm Radial Sealed Stainless Steel Stainless Steel 344 lbf 132 lbf 56 X 1000 rpm
W 607-2Z 7 mm 19 mm 6 mm Radial Shielded Stainless Steel Stainless Steel 344 lbf 132 lbf 43 X 1000 rpm
W 627 7 mm 22 mm 7 mm Radial Open Stainless Steel Stainless Steel 447 lbf 175 lbf 48 X 1000 rpm
W 627-2RS1 7 mm 22 mm 7 mm Radial Sealed Stainless Steel Stainless Steel 447 lbf 175 lbf 22 X 1000 rpm
W 627-2RS1/VT378 7 mm 22 mm 7 mm Radial Sealed Stainless Steel Stainless Steel 447 lbf 175 lbf 48 X 1000 rpm
W 627-2Z 7 mm 22 mm 7 mm Radial Shielded Stainless Steel Stainless Steel 447 lbf 175 lbf 38 X 1000 rpm
W 627/7-2Z 7 mm 22 mm 7 mm Radial Shielded Stainless Steel Stainless Steel 447 lbf 175 lbf 48 X 1000 rpm
W 637 7 mm 26 mm 9 mm Radial Open Stainless Steel Stainless Steel 892 lbf 441 lbf 40 X 1000 rpm
W 637-2RS1 7 mm 26 mm 9 mm Radial Sealed Stainless Steel Stainless Steel 892 lbf 441 lbf 19 X 1000 rpm
W 637-2Z 7 mm 26 mm 9 mm Radial Shielded Stainless Steel Stainless Steel 892 lbf 441 lbf 32 X 1000 rpm
W 617/8 8 mm 12 mm 2.5 mm Radial Open Stainless Steel Stainless Steel 70 lbf 31 lbf 63 X 1000 rpm
W 637/8-2Z 8 mm 12 mm 3.5 mm Radial Shielded Stainless Steel Stainless Steel 70 lbf 31 lbf 53 X 1000 rpm
W 637/8 X 8 mm 14 mm 3.5 mm Radial Open Stainless Steel Stainless Steel 104 lbf 43 lbf 60 X 1000 rpm
W 618/8 8 mm 16 mm 4 mm Radial Open Stainless Steel Stainless Steel 161 lbf 67 lbf 56 X 1000 rpm
W 618/8-2Z 8 mm 16 mm 4 mm Radial Shielded Stainless Steel Stainless Steel 161 lbf 67 lbf 45 X 1000 rpm
W 628/8-2RS1 8 mm 16 mm 5 mm Radial Sealed Stainless Steel Stainless Steel 161 lbf 67 lbf 26 X 1000 rpm
W 628/8-2Z 8 mm 16 mm 5 mm Radial Shielded Stainless Steel Stainless Steel 161 lbf 67 lbf 45 X 1000 rpm
W 628/8-2Z/VT378 8 mm 16 mm 5 mm Radial Shielded Stainless Steel Stainless Steel 161 lbf 67 lbf 45 X 1000 rpm
W 638/8-2Z 8 mm 16 mm 6 mm Radial Shielded Stainless Steel Stainless Steel 161 lbf 67 lbf 45 X 1000 rpm
W 619/8 8 mm 19 mm 6 mm Radial Open Stainless Steel Stainless Steel 281 lbf 102 lbf 53 X 1000 rpm
W 619/8-2RS1 8 mm 19 mm 6 mm Radial Sealed Stainless Steel Stainless Steel 281 lbf 102 lbf 24 X 1000 rpm
W 619/8-2Z 8 mm 19 mm 6 mm Radial Shielded Stainless Steel Stainless Steel 281 lbf 102 lbf 43 X 1000 rpm
W 608 8 mm 22 mm 7 mm Radial Open Stainless Steel Stainless Steel 447 lbf 175 lbf 48 X 1000 rpm
W 608/W64 8 mm 22 mm 7 mm Radial Open Stainless Steel Stainless Steel 447 lbf 175 lbf 48 X 1000 rpm
W 608-2RS1 8 mm 22 mm 7 mm Radial Sealed Stainless Steel Stainless Steel 447 lbf 175 lbf 22 X 1000 rpm
W 608-2RS1/VP311 8 mm 22 mm 7 mm Radial Sealed Stainless Steel Stainless Steel 447 lbf 175 lbf 22 X 1000 rpm
W 608-2RS1/R799 8 mm 22 mm 7 mm Radial Sealed Stainless Steel Stainless Steel 447 lbf 175 lbf 48 X 1000 rpm
W 608-2RS1/W64 8 mm 22 mm 7 mm Radial Sealed Stainless Steel Stainless Steel 447 lbf 175 lbf 48 X 1000 rpm
W 608-2RS1/W64F 8 mm 22 mm 7 mm Radial Sealed Stainless Steel Stainless Steel 447 lbf 175 lbf 48 X 1000 rpm
W 608-2Z 8 mm 22 mm 7 mm Radial Shielded Stainless Steel Stainless Steel 447 lbf 175 lbf 38 X 1000 rpm
W 608-2Z/R799 8 mm 22 mm 7 mm Radial Shielded Stainless Steel Stainless Steel 447 lbf 175 lbf 48 X 1000 rpm
W 608-2Z/VT811 8 mm 22 mm 7 mm Radial Shielded Stainless Steel Stainless Steel 447 lbf 175 lbf 48 X 1000 rpm
W 628 8 mm 24 mm 8 mm Radial Open Stainless Steel Stainless Steel 555 lbf 252 lbf 45 X 1000 rpm
W 628-2RS1 8 mm 24 mm 8 mm Radial Sealed Stainless Steel Stainless Steel 555 lbf 252 lbf 20 X 1000 rpm
W 628-2Z 8 mm 24 mm 8 mm Radial Shielded Stainless Steel Stainless Steel 555 lbf 252 lbf 36 X 1000 rpm
W 628/4-2Z 8 mm 24 mm 8 mm Radial Shielded Stainless Steel Stainless Steel 555 lbf 252 lbf 45 X 1000 rpm
W 638 8 mm 28 mm 9 mm Radial Open Stainless Steel Stainless Steel 892 lbf 441 lbf 40 X 1000 rpm
W 638-2RS1 8 mm 28 mm 9 mm Radial Sealed Stainless Steel Stainless Steel 892 lbf 441 lbf 19 X 1000 rpm
W 638-2Z 8 mm 28 mm 9 mm Radial Shielded Stainless Steel Stainless Steel 892 lbf 441 lbf 32 X 1000 rpm
W 617/9 9 mm 14 mm 3 mm Radial Open Stainless Steel Stainless Steel 117 lbf 53 lbf 60 X 1000 rpm
W 618/9 9 mm 17 mm 4 mm Radial Open Stainless Steel Stainless Steel 171 lbf 75 lbf 53 X 1000 rpm
W 628/9-2RS1 9 mm 17 mm 5 mm Radial Sealed Stainless Steel Stainless Steel 171 lbf 75 lbf 24 X 1000 rpm
W 628/9-2Z 9 mm 17 mm 5 mm Radial Shielded Stainless Steel Stainless Steel 171 lbf 75 lbf 43 X 1000 rpm
W 638/9-2Z 9 mm 17 mm 6 mm Radial Shielded Stainless Steel Stainless Steel 171 lbf 75 lbf 43 X 1000 rpm
W 619/9 9 mm 20 mm 6 mm Radial Open Stainless Steel Stainless Steel 438 lbf 209 lbf 50 X 1000 rpm
W 619/9-2RS1 9 mm 20 mm 6 mm Radial Sealed Stainless Steel Stainless Steel 438 lbf 209 lbf 22 X 1000 rpm
W 619/9-2Z 9 mm 20 mm 6 mm Radial Shielded Stainless Steel Stainless Steel 438 lbf 209 lbf 40 X 1000 rpm
W 619/9-Z/W64 9 mm 20 mm 6 mm Radial Shielded Stainless Steel Stainless Steel 438 lbf 209 lbf 50 X 1000 rpm
W 609 9 mm 24 mm 7 mm Radial Open Stainless Steel Stainless Steel 456 lbf 183 lbf 43 X 1000 rpm
W 609-2RS1 9 mm 24 mm 7 mm Radial Sealed Stainless Steel Stainless Steel 456 lbf 183 lbf 20 X 1000 rpm
W 609-2RS1/VT378 9 mm 24 mm 7 mm Radial Sealed Stainless Steel Stainless Steel 456 lbf 183 lbf 43 X 1000 rpm
W 609-2Z 9 mm 24 mm 7 mm Radial Shielded Stainless Steel Stainless Steel 456 lbf 183 lbf 36 X 1000 rpm
W 629 9 mm 26 mm 8 mm Radial Open Stainless Steel Stainless Steel 892 lbf 441 lbf 40 X 1000 rpm
W 629-2RS1 9 mm 26 mm 8 mm Radial Sealed Stainless Steel Stainless Steel 892 lbf 441 lbf 19 X 1000 rpm
W 629-2Z 9 mm 26 mm 8 mm Radial Shielded Stainless Steel Stainless Steel 892 lbf 441 lbf 32 X 1000 rpm
W 639 9 mm 30 mm 10 mm Radial Open Stainless Steel Stainless Steel 980 lbf 522 lbf 36 X 1000 rpm
W 639-2RS1 9 mm 30 mm 10 mm Radial Sealed Stainless Steel Stainless Steel 980 lbf 522 lbf 16 X 1000 rpm
W 639-2Z 9 mm 30 mm 10 mm Radial Shielded Stainless Steel Stainless Steel 980 lbf 522 lbf 30 X 1000 rpm
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