BEARINGDEX
Deep groove ball, miniature

635 bearing

5 mm bore, 19 mm outside diameter, 6 mm width (0.1969 × 0.748 × 0.2362 in).

Cross-reference 635Decode a full part number

Dimensions

mminch
Bore d50.1969
Outside diameter D190.7480
Width B60.2362

Quick numbers

Pitch diameter dm12.0 mm
Section height (D − d)/27.0 mm
n·dm at 1,800 rpm21,600
n·dm at 3,600 rpm43,200

Compare against the maker's limiting speed. Speed calculator · L10 life

What the number means

6Deep groove ball
3Diameter series 3: medium
5Single digit: bore is 5 mm, written directly

How each brand writes it

Same bearing, every maker's notation
VersionSKFFAGNSKNTNKoyoNACHI
Open635635635635635635
Shields both sides635-2Z635-2ZR635ZZ635ZZ635ZZ635ZZE
Contact seals both sides635-2RSH635-2RSR635DDU635LLU635-2RS635-2NSE
Contact seals both sides, C3635-2RSH/C3635-2RSR-C3635DDUC3635LLUC3635-2RSC3635-2NSE C3 Verify
Non-contact seals both sides635-2RSL635-2BRS Verify635VV635LLB635-2RU Verify635-2NKE Verify
Shields both sides, C3635-2Z/C3635-2ZR-C3635ZZC3635ZZC3635ZZC3635ZZE C3 Verify