BEARINGDEX
Deep groove ball, miniature

609 bearing

9 mm bore, 24 mm outside diameter, 7 mm width (0.3543 × 0.9449 × 0.2756 in).

Cross-reference 609Decode a full part number

Dimensions

mminch
Bore d90.3543
Outside diameter D240.9449
Width B70.2756

Quick numbers

Pitch diameter dm16.5 mm
Section height (D − d)/27.5 mm
n·dm at 1,800 rpm29,700
n·dm at 3,600 rpm59,400

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

What the number means

6Deep groove ball
0Diameter series 0: extra light
9Single digit: bore is 9 mm, written directly

How each brand writes it

Same bearing, every maker's notation
VersionSKFFAGNSKNTNKoyoNACHI
Open609609609609609609
Shields both sides609-2Z609-2ZR609ZZ609ZZ609ZZ609ZZE
Contact seals both sides609-2RSH609-2RSR609DDU609LLU609-2RS609-2NSE
Contact seals both sides, C3609-2RSH/C3609-2RSR-C3609DDUC3609LLUC3609-2RSC3609-2NSE C3 Verify
Non-contact seals both sides609-2RSL609-2BRS Verify609VV609LLB609-2RU Verify609-2NKE Verify
Shields both sides, C3609-2Z/C3609-2ZR-C3609ZZC3609ZZC3609ZZC3609ZZE C3 Verify