Metric 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

3 mm (0.1181 in)(23)

4 mm (0.1575 in)(7)
OD

12 mm (0.4724 in)(2)

13 mm (0.5118 in)(5)

6 mm (0.2362 in)(6)

7 mm (0.2756 in)(3)

8 mm (0.3150 in)(8)

9 mm (0.3543 in)(6)
Width

2 mm (0.0787 in)(2)

2.5 mm (0.0984 in)(8)

3 mm (0.1181 in)(9)

4 mm (0.1575 in)(6)

5 mm (0.1969 in)(5)
Static Load

1106 N(3)

160 N(3)

178 N(3)

238 N(1)

264 N(2)

302 N(3)

336 N(3)

427 N(1)

436 N(3)

474 N(1)

485 N(3)

733 N(1)

814 N(1)

995 N(2)

Part Number	Ring Material	ID	OD	Width	Shield Type	Dynamic Load	Static Load	Limited Speed(x1K rpm)
693	52100 Chrome Steel	3 mm (0.1181 in)	8 mm (0.3150 in)	3 mm (0.1181 in)	Open	474 N	144 N	60
S693	440C Stainless Steel	3 mm (0.1181 in)	8 mm (0.3150 in)	3 mm (0.1181 in)	Open	427 N	130 N	54
683zz	52100 Chrome Steel	3 mm (0.1181 in)	7 mm (0.2756 in)	3 mm (0.1181 in)	Shielded	264 N	90 N	63
S683zz	440C Stainless Steel	3 mm (0.1181 in)	7 mm (0.2756 in)	3 mm (0.1181 in)	Shielded	238 N	81 N	56.7
683 2rs	52100 Chrome Steel	3 mm (0.1181 in)	7 mm (0.2756 in)	3 mm (0.1181 in)	Sealed	264 N	90 N	63
MR83 2rs	52100 Chrome Steel	3 mm (0.1181 in)	8 mm (0.3150 in)	3 mm (0.1181 in)	Sealed	336 N	113 N	60
SMR83 2rs	440C Stainless Steel	3 mm (0.1181 in)	8 mm (0.3150 in)	3 mm (0.1181 in)	Sealed	302 N	102 N	54
MR83	52100 Chrome Steel	3 mm (0.1181 in)	8 mm (0.3150 in)	2.5 mm (0.0984 in)	Open	336 N	113 N	60
SMR83	440C Stainless Steel	3 mm (0.1181 in)	8 mm (0.3150 in)	2.5 mm (0.0984 in)	Open	302 N	102 N	54
MR63zz	52100 Chrome Steel	3 mm (0.1181 in)	6 mm (0.2362 in)	2.5 mm (0.0984 in)	Shielded	178 N	59 N	71
SMR63zz	440C Stainless Steel	3 mm (0.1181 in)	6 mm (0.2362 in)	2.5 mm (0.0984 in)	Shielded	160 N	53 N	63.9
MR63 2rs	52100 Chrome Steel	3 mm (0.1181 in)	6 mm (0.2362 in)	2.5 mm (0.0984 in)	Sealed	178 N	59 N	71
SMR63 2rs	440C Stainless Steel	3 mm (0.1181 in)	6 mm (0.2362 in)	2.5 mm (0.0984 in)	Sealed	160 N	53 N	63.9
MR63	52100 Chrome Steel	3 mm (0.1181 in)	6 mm (0.2362 in)	2 mm (0.0787 in)	Open	178 N	59 N	71
SMR63	440C Stainless Steel	3 mm (0.1181 in)	6 mm (0.2362 in)	2 mm (0.0787 in)	Open	160 N	53 N	63.9
604	52100 Chrome Steel	4 mm (0.1575 in)	12 mm (0.4724 in)	4 mm (0.1575 in)	Open	814 N	280 N	48
MR93zz	52100 Chrome Steel	3 mm (0.1181 in)	9 mm (0.3543 in)	4 mm (0.1575 in)	Shielded	485 N	151 N	56
SMR93zz	440C Stainless Steel	3 mm (0.1181 in)	9 mm (0.3543 in)	4 mm (0.1575 in)	Shielded	436 N	136 N	50.4
MR93 2rs	52100 Chrome Steel	3 mm (0.1181 in)	9 mm (0.3543 in)	4 mm (0.1575 in)	Sealed	485 N	151 N	56
SMR93 2rs	440C Stainless Steel	3 mm (0.1181 in)	9 mm (0.3543 in)	4 mm (0.1575 in)	Sealed	436 N	136 N	50.4
MR93	52100 Chrome Steel	3 mm (0.1181 in)	9 mm (0.3543 in)	2.5 mm (0.0984 in)	Open	485 N	151 N	56
SMR93	440C Stainless Steel	3 mm (0.1181 in)	9 mm (0.3543 in)	2.5 mm (0.0984 in)	Open	436 N	136 N	50.4
MR83zz	52100 Chrome Steel	3 mm (0.1181 in)	8 mm (0.3150 in)	3 mm (0.1181 in)	Shielded	336 N	113 N	60
SMR83zz	440C Stainless Steel	3 mm (0.1181 in)	8 mm (0.3150 in)	3 mm (0.1181 in)	Shielded	302 N	102 N	54
S604	440C Stainless Steel	4 mm (0.1575 in)	12 mm (0.4724 in)	4 mm (0.1575 in)	Open	733 N	252 N	43.2
624zz	52100 Chrome Steel	4 mm (0.1575 in)	13 mm (0.5118 in)	5 mm (0.1969 in)	Shielded	1106 N	390 N	40
S624 2rs	440C Stainless Steel	4 mm (0.1575 in)	13 mm (0.5118 in)	5 mm (0.1969 in)	Sealed	995 N	351 N	36
624 2rs	52100 Chrome Steel	4 mm (0.1575 in)	13 mm (0.5118 in)	5 mm (0.1969 in)	Sealed	1106 N	390 N	40
S624	440C Stainless Steel	4 mm (0.1575 in)	13 mm (0.5118 in)	5 mm (0.1969 in)	Open	995 N	351 N	36
624	52100 Chrome Steel	4 mm (0.1575 in)	13 mm (0.5118 in)	5 mm (0.1969 in)	Open	1106 N	390 N	40

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