BEARINGDEX
Deep groove ball

6003 bearing

17 mm bore, 35 mm outside diameter, 10 mm width (0.6693 × 1.378 × 0.3937 in).

Cross-reference 6003Decode a full part number

Dimensions

mminch
Bore d170.6693
Outside diameter D351.3780
Width B100.3937

Quick numbers

Pitch diameter dm26.0 mm
Section height (D − d)/29.0 mm
n·dm at 1,800 rpm46,800
n·dm at 3,600 rpm93,600

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

What the number means

6Deep groove ball
0Diameter series 0: extra light. Width series 0 is implied and left off.
03Bore code 03 is a fixed code for 17 mm

How each brand writes it

Same bearing, every maker's notation
VersionSKFFAGNSKNTNKoyoNACHI
Open600360036003600360036003
Shields both sides6003-2Z6003-2ZR6003ZZ6003ZZ6003ZZ6003ZZE
Contact seals both sides6003-2RSH6003-2RSR6003DDU6003LLU6003-2RS6003-2NSE
Contact seals both sides, C36003-2RSH/C36003-2RSR-C36003DDUC36003LLUC36003-2RSC36003-2NSE C3 Verify
Non-contact seals both sides6003-2RSL6003-2BRS Verify6003VV6003LLB6003-2RU Verify6003-2NKE Verify
Shields both sides, C36003-2Z/C36003-2ZR-C36003ZZC36003ZZC36003ZZC36003ZZE C3 Verify