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Silver metal spherical roller bearing with tapered bore, 55mm inner diameter 120mm outer diameter 29mm width

ZIBOO

ZIBOO NTN 21311 K Spherical Roller Bearing 55x120x29mm

SKU CH-PV59-HV7E2

Spherical roller bearing with 55 mm bore, 120 mm outer diameter and 29 mm width

  • Spherical roller design handles heavy radial and axial loads
  • Tapered bore (suffix K) allows easy mounting on adapter sleeves
  • Precise 55 mm bore, 120 mm outer diameter, 29 mm width fits standard housings
  • NTN manufacturing ensures reliable performance in demanding applications

NTN 21311 K Spherical Roller Bearing

The NTN 21311 K is a spherical roller bearing with a 55 mm bore, 120 mm outer diameter and 29 mm width. It suits electricians and maintenance teams who need to replace worn bearings in motors, gearboxes or conveyor rollers where misalignment occurs.

Tapered bore limits direct mounting

The K suffix marks a 1:12 tapered bore that requires an adapter sleeve or withdrawal sleeve for shaft location. Without the correct sleeve the bearing cannot be secured, so buyers who need a straight bore or who lack sleeve tooling should choose a different variant.

How it compares

Measured against everything we stock in Electrical Trade Tools & Kits, at today’s prices. Recalculated every night.

Price $34.99
Cheaper than about 84% of the 5,006 comparable items (median $95.99).

Specifications

Product
Brand nameZIBOO
Model nameNTN 21311 K

Questions about this item

Which size of the ZIBOO NTN 21311 K bearing matches my shaft and housing?

The bearing has a 55 mm bore, 120 mm outside diameter and 29 mm width, so choose it when those three dimensions fit your application.

What does the 21311 K designation tell me about performance in a machine?

It identifies a spherical roller bearing with a 1:12 tapered bore for adapter-sleeve mounting, suited to heavy radial loads and moderate axial loads in either direction.

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