Inch Standard

Miniature bearings are sometimes referred to as instrument bearings and are used in applications as varied as gyros, anemometers, flow meters, miniature gearboxes, small motors and radio controlled models. Miniature ball bearings can be open or shielded, which helps prevent dirt from entering and lubricant from leaking out, and unflanged or flanged for easier plate mounting. Some miniature ball bearing options feature extended inner rings to help fit certain locking devices when a press fit is not possible

FILTERS

ID

0.04" (1.0160 mm)(2)

0.04688" (1.1908 mm)(4)

0.05556" (1.4112 mm)(4)

0.07813" (1.9845 mm)(6)

0.09375" (2.3813 mm)(7)

0.125" (3.1750 mm)(1)

0.15625" (3.9688 mm)(6)
OD

0.125" (3.1750 mm)(2)

0.15625" (3.9688 mm)(4)

0.1875" (4.7625 mm)(5)

0.25" (6.3500 mm)(6)

0.3125" (7.9375 mm)(12)

0.375" (9.5250 mm)(1)
Width

0.0469" (1.1913 mm)(2)

0.0625" (1.5875 mm)(3)

0.0781" (1.9837 mm)(2)

0.0937" (2.3800 mm)(4)

0.1094" (2.7788 mm)(6)

0.125" (3.1750 mm)(4)

0.1406" (3.5712 mm)(8)

0.1562" (3.9675 mm)(1)
Static Load

106 lbf(3)

109 lbf(1)

18 lbf(1)

19 lbf(2)

20 lbf(1)

21 lbf(2)

36 lbf(1)

40 lbf(2)

44 lbf(2)

49 lbf(3)

54 lbf(3)

62 lbf(3)

69 lbf(3)

95 lbf(3)

Part Number	Ring Material	ID	OD	Width	Shield Type	Dynamic Load	Static Load	Limited Speed(x1K rpm)
SR155zz	440C Stainless Steel	0.15625" (3.9688 mm)	0.3125" (7.9375 mm)	0.125" (3.1750 mm)	Shielded	62 lbf	24 lbf	47.7
R155zz	52100 Chrome Steel	0.15625" (3.9688 mm)	0.3125" (7.9375 mm)	0.125" (3.1750 mm)	Shielded	69 lbf	27 lbf	53
SR155 2rs	440C Stainless Steel	0.15625" (3.9688 mm)	0.3125" (7.9375 mm)	0.125" (3.1750 mm)	Sealed	62 lbf	24 lbf	47.7
R155 2rs	52100 Chrome Steel	0.15625" (3.9688 mm)	0.3125" (7.9375 mm)	0.125" (3.1750 mm)	Sealed	69 lbf	27 lbf	53
SR155	440C Stainless Steel	0.15625" (3.9688 mm)	0.3125" (7.9375 mm)	0.1094" (2.7788 mm)	Open	62 lbf	24 lbf	47.7
R155	52100 Chrome Steel	0.15625" (3.9688 mm)	0.3125" (7.9375 mm)	0.1094" (2.7788 mm)	Open	69 lbf	27 lbf	53
SR2zz	440C Stainless Steel	0.125" (3.1750 mm)	0.375" (9.5250 mm)	0.1562" (3.9675 mm)	Shielded	109 lbf	35 lbf	50.4
R09	52100 Chrome Steel	0.04" (1.0160 mm)	0.125" (3.1750 mm)	0.0469" (1.1913 mm)	Open	20 lbf	5 lbf	130
SR09	440C Stainless Steel	0.04" (1.0160 mm)	0.125" (3.1750 mm)	0.0469" (1.1913 mm)	Open	18 lbf	4 lbf	117
R0	52100 Chrome Steel	0.04688" (1.1908 mm)	0.15625" (3.9688 mm)	0.0625" (1.5875 mm)	Open	21 lbf	6 lbf	110
SR0	440C Stainless Steel	0.04688" (1.1908 mm)	0.15625" (3.9688 mm)	0.0625" (1.5875 mm)	Open	19 lbf	5 lbf	99
R0zz	52100 Chrome Steel	0.04688" (1.1908 mm)	0.15625" (3.9688 mm)	0.0937" (2.3800 mm)	Shielded	21 lbf	6 lbf	110
SR0zz	440C Stainless Steel	0.04688" (1.1908 mm)	0.15625" (3.9688 mm)	0.0937" (2.3800 mm)	Shielded	19 lbf	5 lbf	99
R1	52100 Chrome Steel	0.05556" (1.4112 mm)	0.1875" (4.7625 mm)	0.0781" (1.9837 mm)	Open	44 lbf	12 lbf	90
SR1	440C Stainless Steel	0.05556" (1.4112 mm)	0.1875" (4.7625 mm)	0.0781" (1.9837 mm)	Open	40 lbf	11 lbf	81
R1zz	52100 Chrome Steel	0.05556" (1.4112 mm)	0.1875" (4.7625 mm)	0.1094" (2.7788 mm)	Shielded	44 lbf	12 lbf	90
SR1zz	440C Stainless Steel	0.05556" (1.4112 mm)	0.1875" (4.7625 mm)	0.1094" (2.7788 mm)	Shielded	40 lbf	11 lbf	81
R1-4	52100 Chrome Steel	0.07813" (1.9845 mm)	0.25" (6.3500 mm)	0.0937" (2.3800 mm)	Open	54 lbf	17 lbf	67
SR1-4	440C Stainless Steel	0.07813" (1.9845 mm)	0.25" (6.3500 mm)	0.0937" (2.3800 mm)	Open	49 lbf	15 lbf	60.3
R1-4 2rs	52100 Chrome Steel	0.07813" (1.9845 mm)	0.25" (6.3500 mm)	0.1406" (3.5712 mm)	Sealed	54 lbf	17 lbf	67
SR1-4 2rs	440C Stainless Steel	0.07813" (1.9845 mm)	0.25" (6.3500 mm)	0.1406" (3.5712 mm)	Sealed	49 lbf	15 lbf	60.3
R1-4zz	52100 Chrome Steel	0.07813" (1.9845 mm)	0.25" (6.3500 mm)	0.1406" (3.5712 mm)	Shielded	54 lbf	17 lbf	67
SR1-4zz	440C Stainless Steel	0.07813" (1.9845 mm)	0.25" (6.3500 mm)	0.1406" (3.5712 mm)	Shielded	49 lbf	15 lbf	60.3
R1-5	52100 Chrome Steel	0.09375" (2.3813 mm)	0.3125" (7.9375 mm)	0.1094" (2.7788 mm)	Open	106 lbf	32 lbf	60
SR1-5	440C Stainless Steel	0.09375" (2.3813 mm)	0.3125" (7.9375 mm)	0.1094" (2.7788 mm)	Open	95 lbf	29 lbf	54
R1-5 2rs	52100 Chrome Steel	0.09375" (2.3813 mm)	0.3125" (7.9375 mm)	0.1406" (3.5712 mm)	Sealed	106 lbf	32 lbf	60
SR1-5 2rs	440C Stainless Steel	0.09375" (2.3813 mm)	0.3125" (7.9375 mm)	0.1406" (3.5712 mm)	Sealed	95 lbf	29 lbf	54
R1-5zz	52100 Chrome Steel	0.09375" (2.3813 mm)	0.3125" (7.9375 mm)	0.1406" (3.5712 mm)	Shielded	106 lbf	32 lbf	60
SR1-5zz	440C Stainless Steel	0.09375" (2.3813 mm)	0.3125" (7.9375 mm)	0.1406" (3.5712 mm)	Shielded	95 lbf	29 lbf	54
R133	52100 Chrome Steel	0.09375" (2.3813 mm)	0.1875" (4.7625 mm)	0.0625" (1.5875 mm)	Open	36 lbf	11 lbf	80

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