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(30)
OD

12 mm(6)

14 mm(5)

16 mm(6)

19 mm(6)

24 mm(1)

28 mm(6)
Width

2.5 mm(2)

3.5 mm(6)

4 mm(5)

5 mm(4)

6 mm(6)

8 mm(1)

9 mm(6)
Static Load

1064 N(3)

1712 N(3)

1902 N(3)

2550 N(1)

3491 N(3)

3879 N(3)

416 N(3)

462 N(3)

626 N(2)

695 N(3)

958 N(3)

Part Number	Ring Material	ID	OD	Width	Shield Type	Dynamic Load	Static Load	Limited Speed(x1K rpm)
MR148zz	52100 Chrome Steel	8 mm	14 mm	4 mm	Shielded	695 N	309 N	38
SMR148 2rs	440C Stainless Steel	8 mm	14 mm	4 mm	Sealed	626 N	278 N	34.2
MR148 2rs	52100 Chrome Steel	8 mm	14 mm	4 mm	Sealed	695 N	309 N	38
SMR148	440C Stainless Steel	8 mm	14 mm	3.5 mm	Open	626 N	278 N	34.2
MR148	52100 Chrome Steel	8 mm	14 mm	3.5 mm	Open	695 N	309 N	38
SMR128zz	440C Stainless Steel	8 mm	12 mm	3.5 mm	Shielded	416 N	197 N	36
MR128zz	52100 Chrome Steel	8 mm	12 mm	3.5 mm	Shielded	462 N	219 N	40
SMR128 2rs	440C Stainless Steel	8 mm	12 mm	3.5 mm	Sealed	416 N	197 N	36
MR128 2rs	52100 Chrome Steel	8 mm	12 mm	3.5 mm	Sealed	462 N	219 N	40
SMR128	440C Stainless Steel	8 mm	12 mm	2.5 mm	Open	416 N	197 N	36
MR128	52100 Chrome Steel	8 mm	12 mm	2.5 mm	Open	462 N	219 N	40
S698zz	440C Stainless Steel	8 mm	19 mm	6 mm	Shielded	1712 N	661 N	32.4
698zz	52100 Chrome Steel	8 mm	19 mm	6 mm	Shielded	1902 N	734 N	36
S698 2rs	440C Stainless Steel	8 mm	19 mm	6 mm	Sealed	1712 N	661 N	32.4
698 2rs	52100 Chrome Steel	8 mm	19 mm	6 mm	Sealed	1902 N	734 N	36
698	52100 Chrome Steel	8 mm	19 mm	6 mm	Open	1902 N	734 N	36
S698	440C Stainless Steel	8 mm	19 mm	6 mm	Open	1712 N	661 N	32.4
S688zz	440C Stainless Steel	8 mm	16 mm	5 mm	Shielded	958 N	427 N	32.4
688zz	52100 Chrome Steel	8 mm	16 mm	5 mm	Shielded	1064 N	474 N	36
S688 2rs	440C Stainless Steel	8 mm	16 mm	5 mm	Sealed	958 N	427 N	32.4
688 2rs	52100 Chrome Steel	8 mm	16 mm	5 mm	Sealed	1064 N	474 N	36
S688	440C Stainless Steel	8 mm	16 mm	4 mm	Open	958 N	427 N	32.4
688	52100 Chrome Steel	8 mm	16 mm	4 mm	Open	1064 N	474 N	36
S638zz	440C Stainless Steel	8 mm	28 mm	9 mm	Shielded	3491 N	1427 N	25.2
638zz	52100 Chrome Steel	8 mm	28 mm	9 mm	Shielded	3879 N	1586 N	28
S638 2rs	440C Stainless Steel	8 mm	28 mm	9 mm	Sealed	3491 N	1427 N	25.2
638 2rs	52100 Chrome Steel	8 mm	28 mm	9 mm	Sealed	3879 N	1586 N	28
638	52100 Chrome Steel	8 mm	28 mm	9 mm	Open	3879 N	1586 N	28
S638	440C Stainless Steel	8 mm	28 mm	9 mm	Open	3491 N	1427 N	25.2
S628zz	440C Stainless Steel	8 mm	24 mm	8 mm	Shielded	2550 N	1024 N	25.2

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