Double row angular contact ball bearing

Double-row angular contact ball bearing technology overview

A double row angular contact ball bearing uses a design with two rows of steel balls arranged symmetrically, which can simultaneously withstand radial and axial forces. Its unique structure gives it higher rigidity and load capacity, and is particularly suitable for industrial scenarios with strict requirements on operating accuracy and load-bearing performance. Compared with single-row models, the double-row design significantly improves the overall performance of the bearing, especially under high-speed operating conditions.

Core performance advantages

Compound load bearing capacity

The synergistic effect of the double-row steel balls can simultaneously cope with radial and axial composite stresses, and the load capacity is increased by more than 40% compared with single-row bearings.

Precision operation characteristics

The optimized contact angle design ensures low-friction operation and excellent temperature rise control, meeting the micron-level tolerance requirements of precision equipment.

Long-term and durable design

Uniform load distribution reduces local wear, and with high-quality steel and heat treatment processes, the service life is extended by 30%-50%.

Versatile adaptability

Standardized sizes cover a wide range of working conditions and support customized sealing solutions (contact/non-contact sealing).

Technical parameters of typical models

Key parameter explanation

Dynamic/static load ratio: reflects the safety margin of the bearing in the rotating and stationary state

Compact design: small volume to achieve high load bearing, optimize equipment space utilization

Common brands

SKF Double-row angular contact ball bearing
NSK Double-row angular contact ball bearing
FAG Double-row angular contact ball bearing
INA Double-row angular contact ball bearing
KOYO Double-row angular contact ball bearing
TIMKEN Double-row angular contact ball bearing
NACHI Double-row angular contact ball bearing
NTN Double-row angular contact ball bearing

Key application areas

High-end equipment manufacturing

The five-axis linkage machine tool spindle adopts P4-level precision bearings to ensure 0.001mm machining accuracy

New energy vehicles

The drive motor bearings must meet a speed of more than 20,000 rpm and withstand the axial electromagnetic force of the motor

Clean energy equipment

The design life of the wind turbine main shaft bearing is 200,000 hours, adapting to the extremely cold environment of -40℃

Aerospace

The helicopter transmission system bearings are treated with special lubrication to achieve stable operation at 200℃

Intelligent robots

The collaborative robot joint module adopts an ultra-quiet design with an operating noise of less than 45dB

Technical questions and answers

Q1 What are the core advantages compared to single-row bearings?
The double-row structure has an axial rigidity increase of more than 60%, and the bidirectional thrust load capacity has doubled, which is particularly suitable for working conditions with axial movement.

Q2 Extreme operating temperature?
The standard type is suitable for the range of -30℃~120℃, and the use of fully synthetic grease can be extended to -50℃~180℃ (such as aerospace-specific models).

Q3 Key factors for selection?
Need to focus on verification:

Equivalent dynamic load calculation (Fr+Fa composite formula)

Relationship between limiting speed and dmN value

Lubrication method and relubrication cycle

Q4 Maintenance points?

Check the grease status every 2000 hours of operation

Use a laser alignment instrument to ensure that the installation eccentricity is less than 0.02mm

The vibration monitoring warning value is set to 4.5mm/s

If you have any questions, please see our Angular contact ball bearings Catalog for answer, and if you have futher questions, please seek for our sales representatives for help!