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

0.25"(22)

0.3125"(6)

0.375"(2)
OD

0.375"(4)

0.5"(12)

0.625"(6)

0.75"(6)

0.875"(2)
Width

0.125"(6)

0.1562"(6)

0.1875"(4)

0.196"(6)

0.2188"(4)

0.2812"(4)
Static Load

104 lbf(3)

186 lbf(3)

207 lbf(3)

255 lbf(3)

283 lbf(3)

401 lbf(3)

446 lbf(3)

574 lbf(1)

638 lbf(1)

64 lbf(2)

71 lbf(2)

94 lbf(3)

Part Number	Ring Material	ID	OD	Width	Shield Type	Dynamic Load	Static Load	Limited Speed(x1K rpm)
R168 2rs	52100 Chrome Steel	0.25"	0.375"	0.125"	Sealed	71 lbf	31 lbf	48
SR168 2rs	440C Stainless Steel	0.25"	0.375"	0.125"	Sealed	64 lbf	28 lbf	43.2
R168zz	52100 Chrome Steel	0.25"	0.375"	0.125"	Shielded	71 lbf	31 lbf	48
SR168zz	440C Stainless Steel	0.25"	0.375"	0.125"	Shielded	64 lbf	28 lbf	43.2
R188	52100 Chrome Steel	0.25"	0.5"	0.125"	Open	207 lbf	80 lbf	40
SR188	440C Stainless Steel	0.25"	0.5"	0.125"	Open	186 lbf	72 lbf	36
R188 2rs	52100 Chrome Steel	0.25"	0.5"	0.1875"	Sealed	207 lbf	80 lbf	40
SR188 2rs	440C Stainless Steel	0.25"	0.5"	0.1875"	Sealed	186 lbf	72 lbf	36
R188zz	52100 Chrome Steel	0.25"	0.5"	0.1875"	Shielded	207 lbf	80 lbf	40
SR188zz	440C Stainless Steel	0.25"	0.5"	0.1875"	Shielded	186 lbf	72 lbf	36
R4	52100 Chrome Steel	0.25"	0.625"	0.196"	Open	283 lbf	112 lbf	38
SR4	440C Stainless Steel	0.25"	0.625"	0.196"	Open	255 lbf	101 lbf	34.2
R4 2rs	52100 Chrome Steel	0.25"	0.625"	0.196"	Sealed	283 lbf	112 lbf	38
SR4 2rs	440C Stainless Steel	0.25"	0.625"	0.196"	Sealed	255 lbf	101 lbf	34.2
R4A	52100 Chrome Steel	0.25"	0.75"	0.2188"	Open	446 lbf	161 lbf	36
SR4A	440C Stainless Steel	0.25"	0.75"	0.2188"	Open	401 lbf	145 lbf	32.4
R4A 2rs	52100 Chrome Steel	0.25"	0.75"	0.2812"	Sealed	446 lbf	161 lbf	36
SR4A 2rs	440C Stainless Steel	0.25"	0.75"	0.2812"	Sealed	401 lbf	145 lbf	32.4
R4Azz	52100 Chrome Steel	0.25"	0.75"	0.2812"	Shielded	446 lbf	161 lbf	36
SR4Azz	440C Stainless Steel	0.25"	0.75"	0.2812"	Shielded	401 lbf	145 lbf	32.4
R4zz	52100 Chrome Steel	0.25"	0.625"	0.196"	Shielded	283 lbf	112 lbf	38
SR4zz	440C Stainless Steel	0.25"	0.625"	0.196"	Shielded	255 lbf	101 lbf	34.2
R1810	52100 Chrome Steel	0.3125"	0.5"	0.1562"	Open	104 lbf	50 lbf	40
SR1810	440C Stainless Steel	0.3125"	0.5"	0.1562"	Open	94 lbf	45 lbf	36
R1810 2rs	52100 Chrome Steel	0.3125"	0.5"	0.1562"	Sealed	104 lbf	50 lbf	40
SR1810 2rs	440C Stainless Steel	0.3125"	0.5"	0.1562"	Sealed	94 lbf	45 lbf	36
R1810zz	52100 Chrome Steel	0.3125"	0.5"	0.1562"	Shielded	104 lbf	50 lbf	40
SR1810zz	440C Stainless Steel	0.3125"	0.5"	0.1562"	Shielded	94 lbf	45 lbf	36
R6	52100 Chrome Steel	0.375"	0.875"	0.2188"	Open	638 lbf	256 lbf	32
SR6	440C Stainless Steel	0.375"	0.875"	0.2188"	Open	574 lbf	230 lbf	28.8

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