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

8 mm (0.3150 in)(30)
OD

14 mm (0.5512 in)(1)

16 mm (0.6299 in)(6)

19 mm (0.7480 in)(6)

22 mm (0.8661 in)(5)

24 mm (0.9449 in)(6)

28 mm (1.1024 in)(6)
Width

4 mm (0.1575 in)(3)

5 mm (0.1969 in)(4)

6 mm (0.2362 in)(6)

7 mm (0.2756 in)(5)

8 mm (0.3150 in)(6)

9 mm (0.3543 in)(6)
Static Load

1064 N(3)

1712 N(3)

1902 N(3)

2519 N(2)

2550 N(3)

2799 N(3)

2833 N(3)

3491 N(3)

3879 N(3)

695 N(1)

958 N(3)

Part Number	Ring Material	ID	OD	Width	Shield Type	Dynamic Load	Static Load	Limited Speed(x1K rpm)
628zz	52100 Chrome Steel	8 mm (0.3150 in)	24 mm (0.9449 in)	8 mm (0.3150 in)	Shielded	2833 N	1138 N	28
S628 2rs	440C Stainless Steel	8 mm (0.3150 in)	24 mm (0.9449 in)	8 mm (0.3150 in)	Sealed	2550 N	1024 N	25.2
628 2rs	52100 Chrome Steel	8 mm (0.3150 in)	24 mm (0.9449 in)	8 mm (0.3150 in)	Sealed	2833 N	1138 N	28
S628	440C Stainless Steel	8 mm (0.3150 in)	24 mm (0.9449 in)	8 mm (0.3150 in)	Open	2550 N	1024 N	25.2
628	52100 Chrome Steel	8 mm (0.3150 in)	24 mm (0.9449 in)	8 mm (0.3150 in)	Open	2833 N	1138 N	28
S608zz	440C Stainless Steel	8 mm (0.3150 in)	22 mm (0.8661 in)	7 mm (0.2756 in)	Shielded	2519 N	993 N	30.6
608zz	52100 Chrome Steel	8 mm (0.3150 in)	22 mm (0.8661 in)	7 mm (0.2756 in)	Shielded	2799 N	1103 N	34
S608 2rs	440C Stainless Steel	8 mm (0.3150 in)	22 mm (0.8661 in)	7 mm (0.2756 in)	Sealed	2519 N	993 N	30.6
608 2rs	52100 Chrome Steel	8 mm (0.3150 in)	22 mm (0.8661 in)	7 mm (0.2756 in)	Sealed	2799 N	1103 N	34
608	52100 Chrome Steel	8 mm (0.3150 in)	22 mm (0.8661 in)	7 mm (0.2756 in)	Open	2799 N	1103 N	34
S688	440C Stainless Steel	8 mm (0.3150 in)	16 mm (0.6299 in)	4 mm (0.1575 in)	Open	958 N	427 N	32.4
688	52100 Chrome Steel	8 mm (0.3150 in)	16 mm (0.6299 in)	4 mm (0.1575 in)	Open	1064 N	474 N	36
S638zz	440C Stainless Steel	8 mm (0.3150 in)	28 mm (1.1024 in)	9 mm (0.3543 in)	Shielded	3491 N	1427 N	25.2
638zz	52100 Chrome Steel	8 mm (0.3150 in)	28 mm (1.1024 in)	9 mm (0.3543 in)	Shielded	3879 N	1586 N	28
S638 2rs	440C Stainless Steel	8 mm (0.3150 in)	28 mm (1.1024 in)	9 mm (0.3543 in)	Sealed	3491 N	1427 N	25.2
638 2rs	52100 Chrome Steel	8 mm (0.3150 in)	28 mm (1.1024 in)	9 mm (0.3543 in)	Sealed	3879 N	1586 N	28
638	52100 Chrome Steel	8 mm (0.3150 in)	28 mm (1.1024 in)	9 mm (0.3543 in)	Open	3879 N	1586 N	28
S638	440C Stainless Steel	8 mm (0.3150 in)	28 mm (1.1024 in)	9 mm (0.3543 in)	Open	3491 N	1427 N	25.2
S628zz	440C Stainless Steel	8 mm (0.3150 in)	24 mm (0.9449 in)	8 mm (0.3150 in)	Shielded	2550 N	1024 N	25.2
698zz	52100 Chrome Steel	8 mm (0.3150 in)	19 mm (0.7480 in)	6 mm (0.2362 in)	Shielded	1902 N	734 N	36
S698 2rs	440C Stainless Steel	8 mm (0.3150 in)	19 mm (0.7480 in)	6 mm (0.2362 in)	Sealed	1712 N	661 N	32.4
698 2rs	52100 Chrome Steel	8 mm (0.3150 in)	19 mm (0.7480 in)	6 mm (0.2362 in)	Sealed	1902 N	734 N	36
698	52100 Chrome Steel	8 mm (0.3150 in)	19 mm (0.7480 in)	6 mm (0.2362 in)	Open	1902 N	734 N	36
S698	440C Stainless Steel	8 mm (0.3150 in)	19 mm (0.7480 in)	6 mm (0.2362 in)	Open	1712 N	661 N	32.4
S688zz	440C Stainless Steel	8 mm (0.3150 in)	16 mm (0.6299 in)	5 mm (0.1969 in)	Shielded	958 N	427 N	32.4
688zz	52100 Chrome Steel	8 mm (0.3150 in)	16 mm (0.6299 in)	5 mm (0.1969 in)	Shielded	1064 N	474 N	36
S688 2rs	440C Stainless Steel	8 mm (0.3150 in)	16 mm (0.6299 in)	5 mm (0.1969 in)	Sealed	958 N	427 N	32.4
688 2rs	52100 Chrome Steel	8 mm (0.3150 in)	16 mm (0.6299 in)	5 mm (0.1969 in)	Sealed	1064 N	474 N	36
S698zz	440C Stainless Steel	8 mm (0.3150 in)	19 mm (0.7480 in)	6 mm (0.2362 in)	Shielded	1712 N	661 N	32.4
MR148 2rs	52100 Chrome Steel	8 mm (0.3150 in)	14 mm (0.5512 in)	4 mm (0.1575 in)	Sealed	695 N	309 N	38

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