Inch Miniature Ball Bearings(open)

Item #	Bore Diameter (d)	Outer Diameter (D)	Min. Radius (rs)	Width (B)	Max. Speed x 1000
Item #	Bore Diameter (d)	Outer Diameter (D)	Min. Radius (rs)	Width (B)	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