BEARINGDEX
Deep groove ball, thin section

6806 bearing

30 mm bore, 42 mm outside diameter, 7 mm width (1.1811 × 1.6535 × 0.2756 in). SKF numbers it 61806.

Cross-reference 6806Decode a full part number

Dimensions

mminch
Bore d301.1811
Outside diameter D421.6535
Width B70.2756

Quick numbers

Pitch diameter dm36.0 mm
Section height (D − d)/26.0 mm
n·dm at 1,800 rpm64,800
n·dm at 3,600 rpm129,600

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

What the number means

6Deep groove ball, thin section
8Diameter series 8: thin section. Width series 0 is implied and left off.
06Bore code 06 × 5 = 30 mm

How each brand writes it

Same bearing, every maker's notation
VersionSKFFAGNSKNTNKoyoNACHI
Open6180668066806680668066806
Shields both sides61806-2Z6806-2ZR6806ZZ6806ZZ6806ZZ6806ZZE
Contact seals both sides61806-2RSH6806-2RSR6806DDU6806LLU6806-2RS6806-2NSE
Contact seals both sides, C361806-2RSH/C36806-2RSR-C36806DDUC36806LLUC36806-2RSC36806-2NSE C3 Verify
Non-contact seals both sides61806-2RSL6806-2BRS Verify6806VV6806LLB6806-2RU Verify6806-2NKE Verify
Shields both sides, C361806-2Z/C36806-2ZR-C36806ZZC36806ZZC36806ZZC36806ZZE C3 Verify