Dental Bearings

Special Bearings

Miniature Ball Bearings

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Inch Miniature Ball Bearings(open)

Item # Bore Diameter
(d)
Outer Diameter
(D)
Min. Radius
(rs)
Width
(B)
Max. Speed x 1000
Grease Oil
R144 3.175 mm 6.35 mm 0.10 mm 2.38 mm 67 rpm 80 rpm
R2-5 7.938 mm 0.10 mm 2.779 mm 60 rpm 67 rpm
R2-6 9.525 mm 0.15 mm 2.779 mm 53 rpm 63 rpm
R2 9.525 mm 0.30 mm 3.967 mm 56 rpm 67 rpm
R2A 12.7 mm 0.30 mm 4.366 mm 53 rpm 63 rpm
R155 3.967 mm 7.938 mm 0.10 mm 2.779 mm 53 rpm 63 rpm
R156 4.762 mm 7.938 mm 0.10 mm 2.779 mm 53 rpm 63 rpm
R166 9.525 mm 0.10 mm 3.175 mm 50 rpm 60 rpm
R3 12.7 mm 0.30 mm 3.967 mm 43 rpm 53 rpm
R168 6.35 mm 9.525 mm 0.10 mm
3.175 mm 48 rpm 56 rpm
R188 12.7 mm 0.15 mm 3.175 mm 40 rpm 50 rpm
R4 15.875 mm 0.30 mm 4.978 mm 38 rpm 45 rpm
R4A 19.05 mm 0.40 mm 5.558 mm 36rpm 43 rpm
R1810 7.938 mm 12.7 mm 0.15 mm 3.967 mm 40rpm 48 rpm
R6 9.525 mm 22.225 mm 0.40 mm 5.558 mm 32 rpm 38 rpm
Shielded Metric Bearings, Open Metric Bearings , Inch Metric Bearings(Shield)
Miniature Ball Bearings Interchange Table 1, Miniature Ball Bearings Interchange Table 2