BEARINGDEX
Deep groove ball

6410 bearing

50 mm bore, 130 mm outside diameter, 31 mm width (1.9685 × 5.1181 × 1.2205 in).

Dimensions

mminch
Bore d501.9685
Outside diameter D1305.1181
Width B311.2205

Quick numbers

Pitch diameter dm90.0 mm
Section height (D − d)/240.0 mm
n·dm at 1,800 rpm162,000
n·dm at 3,600 rpm324,000

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

What the number means

6Deep groove ball
4Diameter series 4: heavy. Width series 0 is implied and left off.
10Bore code 10 × 5 = 50 mm

How each brand writes it

Same bearing, every maker's notation
VersionSKFFAGNSKNTNKoyoNACHI
Open641064106410641064106410
Shields both sides6410-2Z6410-2ZR6410ZZ6410ZZ6410ZZ6410ZZE
Contact seals both sides6410-2RSH6410-2RSR6410DDU6410LLU6410-2RS6410-2NSE
Contact seals both sides, C36410-2RSH/C36410-2RSR-C36410DDUC36410LLUC36410-2RSC36410-2NSE C3 Verify
Non-contact seals both sides6410-2RSL6410-2BRS Verify6410VV6410LLB6410-2RU Verify6410-2NKE Verify
Shields both sides, C36410-2Z/C36410-2ZR-C36410ZZC36410ZZC36410ZZC36410ZZE C3 Verify