SPB USA
U.S.A.
SPB USA — 2257 Sarasota Center Blvd. Sarasota, FL 34240
Ph: 941.371.1655 Fx 941.371.1669 Email Us
JAPAN
Sapporo Precision, Inc. - Sapporo, Hokkaido
Kitanihon Seiki Co., Ltd. - Ashibetsu, Hokkaido
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All bearings are available in 52100 Chrome Steel or 440 Stainless Steel.
INCH-SERIES-OPEN-TYPE-cmyk
Dimensional Drawing
Unit of Measure
Items INCH-SERIES-OPEN-TYPE-cmyk
68/0.6
0.0236 Inch (in) Bore Diameter (d) Open Metric Ball Bearing 		INCH-SERIES-OPEN-TYPE-cmyk
681
0.0394 Inch (in) Bore Diameter (d) Open Metric Ball Bearing 		INCH-SERIES-OPEN-TYPE-cmyk
MR31
0.0394 Inch (in) Bore Diameter (d) Open Metric Ball Bearing 		INCH-SERIES-OPEN-TYPE-cmyk
691
0.0394 Inch (in) Bore Diameter (d) Open Metric Ball Bearing 		INCH-SERIES-OPEN-TYPE-cmyk
MR41X
0.0472 Inch (in) Bore Diameter (d) Open Metric Ball Bearing
Bearing Type N/A Metric Bearing
Bore Diameter (d) N/A 0.6 mm0.0236 in N/A 1.0 mm0.0394 in N/A 1.0 mm0.0394 in N/A 1.0 mm0.0394 in N/A 1.2 mm0.0472 in
Outer Diameter (D) N/A 2.5 mm0.0984 in N/A 3.0 mm0.1181 in N/A 3.0 mm0.1181 in N/A 4.0 mm0.1575 in N/A 4.0 mm0.1575 in
Flange Diameter (Df) N/A N/A 3.8 mm0.1496 in N/A N/A 5.0 mm0.1969 in N/A 4.8 mm0.1890 in
Min. Radius (rs) N/A 0.05 mm0.0020 in N/A 0.05 mm0.0020 in N/A 0.05 mm0.0020 in N/A 0.10 mm0.0039 in N/A 0.10 mm0.0039 in
Width (B) N/A 1.0 mm0.0394 in N/A 1.0 mm0.0394 in N/A 1.5 mm0.0591 in N/A 1.6 mm0.0630 in N/A 1.8 mm0.0709 in
Flange Width (Bf) N/A N/A 0.3 mm0.0118 in N/A N/A 0.5 mm0.0197 in N/A 0.4 mm0.0157 in
Seal N/A
Width (B1) N/A N/A N/A N/A N/A 2.5 mm0.0984 in
Flange Width (Bf1) N/A
Load Rating (Cr) N/A 59 N N/A 96 N N/A 96 N N/A 141 N N/A 112 N
Load Rating (Cor) N/A 14 N N/A 25 N N/A 25 N N/A 37 N N/A 33 N
Max. Speed (Grease) x 10001 N/A 128 rpm N/A 117 rpm N/A 117 rpm N/A 105 rpm N/A 105 rpm
Max. Speed (Oil) x 10002 N/A 152 rpm N/A 139 rpm N/A 139 rpm N/A 124 rpm N/A 124 rpm
Cage Type N/A
One-piece steel crown type (W)
Qty Z N/A 5 pcs N/A 6 pcs N/A 6 pcs N/A 5 pcs N/A 7 pcs
Size (Dw) N/A 0.500 mm0.0197 in N/A 0.600 mm0.0236 in N/A 0.600 mm0.0236 in N/A 0.800 mm0.0315 in N/A 0.600 mm0.0236 in
Weight N/A 0.02 grams N/A 0.03 grams N/A 0.04 grams N/A 0.09 grams N/A 0.11 grams
Material N/A 440 Stainless Steel 52100 Chrome Steel
Notes N/A
  • 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.