All bearings are available in 52100 Chrome Steel or 440 Stainless Steel.
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metric-thin-section-open-CMYK

0.3937 Inch (in) Bore Diameter (d) Open Extra Thin Metric Ball Bearing
metric-thin-section-open-CMYK

0.3937 Inch (in) Bore Diameter (d) Open Extra Thin Metric Ball Bearing
metric-thin-section-open-CMYK

0.3937 Inch (in) Bore Diameter (d) Open Extra Thin Metric Ball Bearing
metric-thin-section-open-CMYK

0.3937 Inch (in) Bore Diameter (d) Open Extra Thin Metric Ball Bearing
metric-thin-section-open-CMYK

0.4724 Inch (in) Bore Diameter (d) Open Extra Thin Metric Ball Bearing
Bearing Type N/A Extra Thin Metric Bearing
Bore Diameter (d) N/A 10 mm0.3937 in N/A 10 mm0.3937 in N/A 10 mm0.3937 in N/A 10 mm0.3937 in N/A 12 mm0.4724 in
Outer Diameter (D) N/A 15.0 mm0.5906 in N/A 19.0 mm0.7480 in N/A 19.0 mm0.7480 in N/A 22 mm0.8661 in N/A 18.0 mm0.7087 in
Flange Diameter (Df) N/A 16.5 mm0.6496 in N/A 21.0 mm0.8268 in N/A 21.0 mm0.8268 in N/A 25.0 mm0.9843 in N/A 19.5 mm0.7677 in
Min. Radius (rs) N/A 0.15 mm0.0059 in N/A 0.30 mm0.0118 in N/A 0.30 mm0.0118 in N/A 0.30 mm0.0118 in N/A 0.20 mm0.0079 in
Width (B) N/A 3.0 mm0.1181 in N/A 5.0 mm0.1969 in N/A 7.0 mm0.2756 in N/A 6.0 mm0.2362 in N/A 4.0 mm0.1575 in
Flange Width (Bf) N/A 0.8 mm0.0315 in N/A 1.0 mm0.0394 in N/A 1.5 mm0.0591 in N/A 1.5 mm0.0591 in N/A 0.8 mm0.0315 in
Seal N/A N/A 2RS 2RU N/A 2RS 2RU N/A 2RS 2RU N/A 2RS TTS
Load Rating (Cr) N/A 857 N N/A 1720 N N/A 1720 N N/A 2700 N N/A 928 N
Load Rating (Cor) N/A 435 N N/A 840 N N/A 840 N N/A 1270 N N/A 532 N
Max. Speed (Grease) x 10001 N/A 15 rpm N/A 34 rpm N/A 34 rpm N/A 31 rpm N/A 13 rpm
Max. Speed (Oil) x 10002 N/A 17 rpm N/A 40 rpm N/A 40 rpm N/A 37 rpm N/A 15 rpm
Cage Type
N/A
One-piece steel crown type (W)
 		N/A
One-piece nylon crown type (TW)

Two-pieces steel ribbon type (J)
 		N/A
One-piece nylon crown type (TW)

Two-pieces steel ribbon type (J)
 		N/A
Two-pieces steel ribbon type (J)
 		N/A
One-piece steel crown type (W)
Qty Z N/A 11 pcs N/A 10 pcs N/A 10 pcs N/A 9 pcs N/A 13 pcs
Size (Dw) N/A 1.588 mm0.0625 in N/A 2.381 mm0.0937 in N/A 2.381 mm0.0937 in N/A 3.175 mm0.1250 in N/A 1.588 mm0.0625 in
Material N/A 440 Stainless Steel 52100 Chrome Steel
Notes N/A Note for Min. Radius (rs) - Not according to JIS B 1521. N/A Open type bearings have shield/seal grooves. N/A Open type bearings have shield/seal grooves. N/A Open type bearings have shield/seal grooves. N/A Open type bearings have shield/seal grooves.
  • 1 Applicable only for open, single Z, ZZ, single RU and 2RU types in inner ring rotating conditions. Max. speeds for the contact rubber seal(s) types will be around 50-60 % of above values.
  • 2 Applicable only for open, single Z, ZZ, single RU and 2RU types in inner ring rotating conditions. Max. speeds for the contact rubber seal(s) types will be around 50-60 % of above values.