Precision Ball Bearings | 618/619 & 718/719 Series

Comprehensive Range of Rolling Mill Bearings

Featured Rolling Mill Bearing Models

Our product line includes various bearing types optimized for cold rolling, hot rolling, and other mill applications. Each model is crafted to deliver high radial and axial load capacity, ensuring reliable performance in harsh environments.

Angular Contact Ball Bearings 718 / 719 Series

CHG manufactures 718 and 719 series angular contact ball bearings for high-speed, high-precision applications. Custom bearing solutions available.

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Deep Groove Ball Bearings 618 / 619 Series

Explore CHG 618 and 619 series deep groove ball bearings for high-speed and precision applications. OEM customization and technical support available.

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ADVANTAGES

Why Choose CHG Precision Ball Bearings

P5/P4 Precision Options

Precision grades such as P5 and P4 can be reviewed according to bearing size, speed and application requirements.

Large-Bore Manufacturing

CHG supports large-bore precision ball bearings and non-standard dimensions based on bearing number or drawing.

Preload & Matching Options

Angular contact bearings can be reviewed for contact angle, preload and DB, DF or DT matched arrangements.

Inspection & Traceability

Dimensional, running accuracy and material inspection records can be provided according to order requirements.

Application

Applications of CHG Precision Ball Bearings

High-Precision Machine Tools

For spindles and rotary axes requiring low runout, high rigidity and stable high-speed operation.

Precision Rotary Tables

For indexing and positioning systems requiring repeatable motion and controlled radial and axial accuracy.

Industrial Automation Equipment

For servo mechanisms and automated production systems requiring low vibration and reliable positioning.

Medical Imaging Equipment

For CT, scanning and diagnostic systems requiring smooth rotation, low noise and consistent accuracy.

Optical, Radar & Positioning Systems

For stabilized platforms and tracking mechanisms requiring low friction and precise motion.

Aerospace & Satellite Systems

For pointing, scanning and actuation mechanisms where accuracy, weight and reliability are critical.

High-Speed Motors & Test Rigs

For high-speed shafts and test equipment requiring controlled heat generation and stable rotation.

Semiconductor & Inspection Equipment

For precision stages and inspection mechanisms requiring low vibration and repeatable positioning.

Customization

Custom Precision Ball Bearing Solutions

Custom by Bearing Number or Series

Send the existing bearing number or specify the 618, 619, 718 or 719 series. CHG will review the design and replacement requirements.

Custom by Drawing and Dimensions

Send ID, OD, width and 2D or PDF drawings. CHG will review dimensions, internal structure and production feasibility.

Custom by Precision & Matching Requirements

Specify P5/P4, runout, clearance or preload, contact angle, DB/DF/DT arrangement, speed and lubrication requirements.

Custom by Application Conditions

Send equipment type, radial and axial load, speed, temperature, rigidity, installation fit and required service life for engineering review.

FAQs

Precision Ball Bearings FAQs

What precision ball bearings does CHG manufacture?

CHG manufactures precision deep groove ball bearings in 618 and 619 series, and precision angular contact ball bearings in 718 and 719 series. Large-bore and custom designs can be reviewed.

Can CHG provide matched angular contact bearing sets?

Yes. Depending on the model and application, DB, DF and DT arrangements, contact angle and preload can be reviewed for matched pairs or sets.

Can CHG provide inspection records?

Yes. Dimensional inspection, running accuracy, material certificates, product photos and packing photos can be provided according to order requirements.

What precision grades are available?

Precision grades such as P5 and P4 can be reviewed according to bearing size, design and application. Please state the required accuracy class or radial and axial runout.

Can internal clearance or preload be customized?

Yes. Please provide speed, radial and axial load, temperature, lubrication, fits and rigidity requirements so the suitable clearance or preload can be evaluated.

What information is needed for a quotation?

Please send the bearing number or series, ID / OD / width, precision class, clearance or preload, pairing arrangement, speed, load, application and quantity. A drawing is helpful for custom designs.

Need Precision Ball Bearings for Your Application?

Send your bearing number, series, dimensions and technical requirements. CHG will review accuracy, preload or clearance, matching arrangement and application conditions before quotation.

Large-bore 618, 619, 718 and 719 series options
P5/P4 precision, clearance and preload requirements can be reviewed
Engineering support for contact angle, matched sets, speed and lubrication
We typically respond within 24 hours on working days

Get a quick quote

We typically confirm within 24 hours.

Precision Ball Bearings for High-Accuracy Motion Systems