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Search verified bearing designations and technical parameters across SKF, FAG, INA, TIMKEN, NSK, KOYO, IKO, NACHI and NTN.

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Designation Brand Category Inside dmm Outside Dmm Width Bmm

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ABEC equivalent (radial ball bearings)Understand the mapping and its limits →

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Bearing designation

Closure group

Brand

TIMKEN21FAG12SKF12KOYO3NSK2

Product family

Radial srb21Spherical roller bearings13Spherical roller bearings2Adapter assembles1Withdrawal sleeves1

Detailed product type

Spherical roller bearings38Spherical roller bearing with relubrication features4Spherical roller bearing with tapered bore and relubrication features4Spherical roller bearing for low-speed applications, with relubrication features2Spherical roller bearing for low-speed applications, with tapered bore and relubrication features2

Bearing dimensions

Minimum and maximum (mm)

Inside d

Outside D

Width B

Height H

Technical attributes

Series

EX26851212221212

Sealing2RS vs ZZ selection guide →

Open21Without12

Internal clearance

CN6C34C3 (Group 3) — Internal clearance larger than CN4CN (Group N) — Normal internal clearance4C4 (Group 4) — Internal clearance larger than C33C22C2 (Group 2) — Internal clearance smaller than CN1C41Special1

Precision class

Normal2

Cage

Steel cage16Sheet metal12JPA — Sheet metal cage7Brass cage5M — Brass Cage5Pressed steel2

Lubricant

None12

Performance

Dynamic load ≥ kN

Static load ≥ kN

Limit speed ≥ r/min

Mass ≤ kg

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