BEARINGDEX
Deep groove ball

6217 bearing

85 mm bore, 150 mm outside diameter, 28 mm width (3.3465 × 5.9055 × 1.1024 in).

Dimensions

mminch
Bore d853.3465
Outside diameter D1505.9055
Width B281.1024

Quick numbers

Pitch diameter dm117.5 mm
Section height (D − d)/232.5 mm
n·dm at 1,800 rpm211,500
n·dm at 3,600 rpm423,000

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

What the number means

6Deep groove ball
2Diameter series 2: light. Width series 0 is implied and left off.
17Bore code 17 × 5 = 85 mm

How each brand writes it

Same bearing, every maker's notation
VersionSKFFAGNSKNTNKoyoNACHI
Open621762176217621762176217
Shields both sides6217-2Z6217-2ZR6217ZZ6217ZZ6217ZZ6217ZZE
Contact seals both sides6217-2RSH6217-2RSR6217DDU6217LLU6217-2RS6217-2NSE
Contact seals both sides, C36217-2RSH/C36217-2RSR-C36217DDUC36217LLUC36217-2RSC36217-2NSE C3 Verify
Non-contact seals both sides6217-2RSL6217-2BRS Verify6217VV6217LLB6217-2RU Verify6217-2NKE Verify
Shields both sides, C36217-2Z/C36217-2ZR-C36217ZZC36217ZZC36217ZZC36217ZZE C3 Verify

Same size, different bearing

These share the 85 × 150 × 28 mm envelope but carry load differently. They aren't drop-in swaps.