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

0.15625"(4)

0.1875"(24)

0.25"(2)
OD

0.3125"(10)

0.375"(8)

0.5"(6)

0.625"(6)
Width

0.1094"(2)

0.125"(16)

0.1562"(2)

0.196"(10)
Static Load

122 lbf(3)

136 lbf(3)

224 lbf(3)

249 lbf(3)

255 lbf(2)

283 lbf(2)

300 lbf(1)

333 lbf(1)

62 lbf(5)

64 lbf(1)

69 lbf(5)

71 lbf(1)

Part Number	Ring Material	ID	OD	Width	Shield Type	Dynamic Load	Static Load	Limited Speed(x1K rpm)
R155 2rs	52100 Chrome Steel	0.15625"	0.3125"	0.125"	Sealed	69 lbf	27 lbf	53
SR155 2rs	440C Stainless Steel	0.15625"	0.3125"	0.125"	Sealed	62 lbf	24 lbf	47.7
R155zz	52100 Chrome Steel	0.15625"	0.3125"	0.125"	Shielded	69 lbf	27 lbf	53
SR155zz	440C Stainless Steel	0.15625"	0.3125"	0.125"	Shielded	62 lbf	24 lbf	47.7
R156	52100 Chrome Steel	0.1875"	0.3125"	0.1094"	Open	69 lbf	27 lbf	53
SR156	440C Stainless Steel	0.1875"	0.3125"	0.1094"	Open	62 lbf	24 lbf	47.7
R156 2rs	52100 Chrome Steel	0.1875"	0.3125"	0.125"	Sealed	69 lbf	27 lbf	53
SR156 2rs	440C Stainless Steel	0.1875"	0.3125"	0.125"	Sealed	62 lbf	24 lbf	47.7
R156zz	52100 Chrome Steel	0.1875"	0.3125"	0.125"	Shielded	69 lbf	27 lbf	53
SR156zz	440C Stainless Steel	0.1875"	0.3125"	0.125"	Shielded	62 lbf	24 lbf	47.7
R166	52100 Chrome Steel	0.1875"	0.375"	0.125"	Open	136 lbf	49 lbf	50
SR166	440C Stainless Steel	0.1875"	0.375"	0.125"	Open	122 lbf	44 lbf	45
R166 2rs	52100 Chrome Steel	0.1875"	0.375"	0.125"	Sealed	136 lbf	49 lbf	50
SR166 2rs	440C Stainless Steel	0.1875"	0.375"	0.125"	Sealed	122 lbf	44 lbf	45
R166zz	52100 Chrome Steel	0.1875"	0.375"	0.125"	Shielded	136 lbf	49 lbf	50
SR166zz	440C Stainless Steel	0.1875"	0.375"	0.125"	Shielded	122 lbf	44 lbf	45
R3	52100 Chrome Steel	0.1875"	0.5"	0.1562"	Open	249 lbf	88 lbf	43
SR3	440C Stainless Steel	0.1875"	0.5"	0.1562"	Open	224 lbf	79 lbf	38.7
R3 2rs	52100 Chrome Steel	0.1875"	0.5"	0.196"	Sealed	249 lbf	88 lbf	43
SR3 2rs	440C Stainless Steel	0.1875"	0.5"	0.196"	Sealed	224 lbf	79 lbf	38.7
R3A	52100 Chrome Steel	0.1875"	0.625"	0.196"	Open	283 lbf	112 lbf	38
SR3A	440C Stainless Steel	0.1875"	0.625"	0.196"	Open	255 lbf	101 lbf	34.2
R3A 2rs	52100 Chrome Steel	0.1875"	0.625"	0.196"	Open	333 lbf	131 lbf	38
SR3A 2rs	440C Stainless Steel	0.1875"	0.625"	0.196"	Open	300 lbf	118 lbf	34.2
R3Azz	52100 Chrome Steel	0.1875"	0.625"	0.196"	Shielded	283 lbf	112 lbf	38
SR3Azz	440C Stainless Steel	0.1875"	0.625"	0.196"	Shielded	255 lbf	101 lbf	34.2
R3zz	52100 Chrome Steel	0.1875"	0.5"	0.196"	Shielded	249 lbf	88 lbf	43
SR3zz	440C Stainless Steel	0.1875"	0.5"	0.196"	Shielded	224 lbf	79 lbf	38.7
R168	52100 Chrome Steel	0.25"	0.375"	0.125"	Open	71 lbf	31 lbf	48
SR168	440C Stainless Steel	0.25"	0.375"	0.125"	Open	64 lbf	28 lbf	43.2

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