21300 Series Spherical Roller Bearings

21300 series spherical roller bearings are compact self-aligning bearings for heavy radial loads. They tolerate shaft misalignment and shaft deflection. We supply complete sizes with ready stock and OEM service, ideal for mining, gearbox and construction machinery.

Classification :

Spherical Roller Bearings

Keywords :

Spherical Roller Bearings 213xx,213xx self-aligning spherical roller bearings,Double-Row Spherical Roller Bearings,213xx heavy-duty spherical roller bearings

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21300 Spherical Roller Bearings

The 21300 series spherical roller bearing is double row spherical roller bearing, built for heavy radial load and moderate axial load. It features self‑aligning ability to tolerate shaft deflection and misalignment.

Our factory supplies full sizes of 21300 spherical roller bearings with sufficient stock. OEM service is available for bulk importers and distributors.

Dimensions of 21300 Series Spherical Roller Bearings

Model	Bore(mm)	Outer Diameter(mm)	Width(mm)	Dynamic Load(kN)	Static Load(kN)
21304	20	52	15	47.2	44.8
21305	25	62	17	62.2	58.5
21306	30	72	19	81.2	77.2
21307	35	80	21	94.8	90.5
21308	40	90	23	112	108
21309	45	100	25	140	132
21310	50	110	27	160	158
21311	55	120	29	190	188
21312	60	130	31	218	222
21313	65	140	33	252	260

Product Features

Self‑aligning Property

Compensate shaft misalignment and elastic deformation.

Heavy Load Capacity

Double roller structure supports heavy radial and axial load.

Wide Application

Fit for mining, crusher, fan, gearbox and construction equipment.

Flexible Supply

Ready stock for standard sizes, OEM & custom packaging available.

Application Scenarios

Mining & Crushing Equipment

Rock crushers, vibrating screens, mining conveyors under heavy shock load.

Industrial Gearboxes

Speed reducers, transmission gear units with shaft deflection.

Fans & Blowers

Large industrial fans, blowers with vibration and shaft misalignment.

Construction Machinery

Excavators, mixers and heavy construction mechanical assemblies.

Our Advantages for Bulk Importers & Distributors

10+ Years Bearing Factory

Professional Chinese manufacturer with stable production capacity.

Full Size Ready Stock

Complete stock of standard 21300 bearings, fast bulk shipment.

Strict Quality Control

Full inspection before packing to guarantee consistent quality.

OEM & Custom Service

Custom marking, export packaging to support your brand business.

Frequently Asked Questions

What are 21300 series spherical roller bearings mainly used for?

21300 series spherical roller bearings are compact‑width self‑aligning roller bearings for heavy‑load equipment, widely used for mining crushers, industrial gearboxes, fans and construction machinery with shaft deflection and misalignment.

What does suffix K mean on 21300K spherical roller bearing?

Suffix K stands for 1:12 tapered inner bore. 21300K spherical roller bearings work with adapter sleeves for easy mounting and dismounting on smooth shafts.

What is W33 feature on 21300 spherical roller bearing?

W33 means outer ring with circumferential grease groove and 3 lubrication holes. It allows on‑site regreasing without disassembling 21300 spherical roller bearings for 24‑hour continuous‑running heavy‑duty machines.

What is the difference between 21300 and 22300 spherical roller bearings?

21300 series features narrower width for limited installation space; 22300 series has wider cross‑section to accept heavier radial shock loads.

What is your MOQ and lead‑time for bulk 21300 spherical roller bearing orders?

Most standard 21300 spherical roller bearings are in stock. Small bulk orders can ship within 7‑10 working days. Contact us for exact MOQ and sea‑air freight quotation.

Get Factory Wholesale Price

Send your bearing model and quantity to us, we will reply promptly.

Category Overview

Spherical Roller Bearings are double-row, self-aligning rolling bearings with barrel-shaped rollers and a spherical outer raceway. They are specially designed to accommodate heavy radial loads, impact loads, and moderate axial loads, while automatically compensating for shaft deflection and mounting misalignment.With exceptional rigidity, durability, and low maintenance requirements, they are widely used in heavy industrial machinery operating under severe conditions.

Our Series Breakdown

We offer a complete range of spherical roller bearing series to meet different load, size and application needs:

Series	Features	Typical Applications
222 Series	Compact design, medium load capacity, good self-aligning performance	General heavy machinery, reducers, fans, pumps
223 Series	Enhanced load capacity, wider cross-section, strong shock resistance	Crushers, vibrating screens, conveyors, mining equipment
230 Series	Low cross-section, high stiffness, suitable for restricted radial space	Large gearboxes, paper machines, industrial transmission
240 Series	Extra wide cross-section, ultra-heavy load capacity, long service life	Large-scale crushers, mills, metallurgical equipment
231 Series	High load, large size, good axial load resistance	Heavy reducers, rolling mills, large fans
241 Series	Super heavy-duty, large dimensions, high reliability	Metallurgical machinery, mining equipment, large crushers

Core Advantages

Excellent self-aligning ability to compensate shaft misalignment
Extremely high radial and impact load capacity
Stable operation under harsh conditions
Good sealing and lubrication performance
Long service life and low maintenance cost

Typical Applications

Widely used in mining machinery, crushing equipment, vibrating screens, reducers, cement machinery, metallurgical equipment, papermaking machinery, conveyors, and other heavy-duty industrial equipment.

PRODUCT TESTING

Bearing Forging

Bearing Annealing

Turning Process

Quenching

Bearing Assembly

Bearing Clearance Testing

Grease injection

Bearing Marking

Spherical Roller Bearings