Precision Angular Contact Ball Bearings
TEDIN manufactures angular contact ball bearings for machine tool spindles, high-speed motors and industrial equipment, with matched sets and custom options for OEM requirements.
Angular Contact Ball Bearings for Combined Loads
Angular contact ball bearings support combined radial and axial loads. Single-row designs support axial loads in one direction, while paired arrangements can provide axial support in both directions. For precision machine tool spindles and other industrial equipment, selection depends on contact angle, bearing arrangement, preload, speed and lubrication.
Angular Contact Ball Bearing Series & Configurations
Explore 718, 719, 70 and 72 series alongside matched sets, double-row designs, four-point contact bearings and double direction thrust configurations. Visit each category for specifications and selection guidance.
718 Series Angular Contact Ball Bearings
Ultra-light cross-section for compact bearing arrangements where radial installation space is limited.
View 718 Series
719 Series Angular Contact Ball Bearings
Light cross-section for precision spindle arrangements. Speed and stiffness depend on internal design and preload.
View 719 Series
70 Series Angular Contact Ball Bearings
A larger cross-section than 719 at the same bore, providing options for balancing installation space and load capacity.
View 70 Series
72 Series Angular Contact Ball Bearings
A larger cross-section than 70 at the same bore, generally offering higher load capacity with more installation space.
View 72 Series
Matched Angular Contact Ball Bearings
Matched sets for DB, DF or DT mounting. Universally matchable options are available subject to compatibility and specified preload or clearance.
View Matched Sets
Double Row Angular Contact Ball Bearings
Two ball rows in one bearing provide combined radial and bidirectional axial support in a compact axial space.
View Double Row Bearings
QJ Series Four Point Contact Ball Bearings
Designed primarily for axial loads in both directions. Combined-load suitability depends on the axial-to-radial load relationship and bearing design.
View QJ Series
Double Direction Thrust Angular Contact Ball Bearings
Precision bidirectional axial support for machine tool spindles. Typically used with separate radial bearings for rigid axial positioning.
View Thrust BearingsCross-Section Size Comparison
Compare 718, 719, 70 and 72 series at the same bore diameter to evaluate installation space and bearing size.
Select by Space and Load
At the same bore diameter, cross-sections generally increase from 718 through 719 and 70 to 72 series. Smaller sections save installation space, while larger sections generally offer greater load capacity.
Confirm the selected model's dimensions and load ratings. Speed and stiffness also depend on contact angle, internal design, preload and lubrication.
Compare DB, DF and DT Bearing Arrangements
Compare the main differences in load support and stiffness. Universal matching allows compatible bearings to be assembled in DB, DF or DT arrangements.
| Key Difference |
DB Back-to-Back |
DF Face-to-Face |
DT Tandem |
Universal Matching Pairing Capability |
|---|---|---|---|---|
| Contact Lines | Spread outward. | Meet inward. | Run in the same direction. | Follow the chosen arrangement. |
| Axial Load Support | Both directions. | Both directions. | One direction; shares load between bearings. | Follows DB, DF or DT mounting. |
| Resistance to Tilting | Generally higher than DF. | Generally lower than DB. | Depends on the complete support layout. | Follows the chosen arrangement. |
| Alignment | Needs accurate alignment. | More tolerant of slight misalignment than DB. | Needs accurate alignment for load sharing. | Same requirements as the chosen arrangement. |
| Main Selection Reason | Greater moment stiffness. | Bidirectional axial support with some alignment tolerance. | Greater axial capacity in one direction. | Flexible assembly of compatible bearings. |
Load support: DB, DF and DT arrangements also support radial loads. DT needs opposing support for reverse axial loads. DF is not self-aligning.
Matching and preload: Universal matching is not a separate mounting arrangement or unrestricted random pairing. Confirm bearing compatibility and the specified preload or clearance. Operating preload can change with temperature, fits and mounting conditions.
Materials, Cages & Bearing Suffixes
Bearing Rings & Rolling Elements
Bearing Steel
GCr15 or GCr15SiMn bearing steel, selected by bearing size and design, provides wear resistance and fatigue strength.
Hybrid Ceramic Option
Steel rings with silicon nitride (Si3N4) balls. Lighter rolling elements reduce centrifugal loading and can support higher-speed operation.
Cage Options
Machined Brass
A strong cage option for applications requiring durability and suitable temperature resistance.
Phenolic Resin
A lightweight cage option commonly used in high-speed precision spindle bearings.
Common Bearing Suffixes
Quick reference only. Codes vary by manufacturer and bearing series.
| Category | Suffix | Common Meaning |
|---|---|---|
| Contact Angle | C | 15° contact angle. |
| AC | 25° contact angle. | |
| B | 40° contact angle. | |
| Cage Material | M | Machined brass cage. |
| TYN / P | Polyamide cage in some designation systems. | |
| TR / T | Phenolic resin cage in some designation systems. | |
| Pairing & Arrangement | DB | Back-to-back arrangement. |
| DF | Face-to-face arrangement. | |
| DT | Tandem arrangement. | |
| SU / DU | Universal matching codes in some catalogs; confirm set type and preload. | |
| Precision Class | P5 | ISO tolerance class 5. |
| P4 | ISO tolerance class 4; tighter than P5. | |
| P2 | ISO tolerance class 2; tighter than P4. |
Before ordering: Confirm available materials, cage options and the complete bearing designation against the TEDIN product specification or drawing. Similar suffixes do not guarantee equivalent bearings.
How to Select Angular Contact Ball Bearings
Start with load and speed, then confirm the arrangement, precision class and preload for your application.
Contact Angle
Balance axial load capacity with operating speed.
15°: Often selected for high speed.
25°: Balances speed and axial support.
40°: Favors higher axial capacity.
Arrangement
Choose by axial load direction and moment stiffness.
DB: Greater resistance to tilting.
DF: More tolerance of slight misalignment.
DT: Shares axial load in one direction.
Precision Class
Match bearing tolerances to your accuracy requirements.
P5: Precision industrial applications.
P4: Common for precision machine tool spindles.
P2: Tighter tolerances for demanding accuracy.
Preload & Matching
Balance stiffness with friction and heat generation.
Light preload: Often preferred for higher speed.
Higher preload: Increases stiffness but may increase heat.
Matched bearings: Confirm compatibility and specified preload.
Need Help with Bearing Selection?
Share your bearing model or drawing, operating speed, radial and axial loads, and lubrication method. TEDIN can help review suitable bearings and matched sets.
Factory Customization & Quality Control
From drawing review to final inspection, TEDIN supports custom angular contact bearing orders with clearly defined manufacturing and acceptance requirements.
Drawing & Requirement Review
Share your drawing, bearing designation and application requirements. Key tolerances, interfaces and acceptance criteria can be reviewed before production.
Custom Manufacturing Support
For non-standard and OEM orders, TEDIN can review manufacturing feasibility and confirm the agreed specification, order quantity and delivery requirements.
Inspection & Quality Control
Dimensional accuracy and running accuracy are checked against the applicable product requirements. Confirm any additional inspection or documentation needs when placing your order.
Related Technical Support
Review angular contact ball bearing arrangements, contact angle selection and matching requirements before specifying or replacing bearings.
DB, DF & DT Bearing Arrangement Guide
Compare load directions, moment stiffness and mounting requirements for back-to-back, face-to-face and tandem arrangements.
Read Guide →
Contact Angle Selection Guide
Review how 15°, 25° and 40° contact angles influence radial and axial load support, stiffness and speed capability.
Read Guide →
Bearing Matching & Replacement Guide
Check pairing compatibility, designated matched sets and assembly requirements before selecting replacement bearings.
Read Guide →Frequently Asked Questions
Practical answers on bearing compatibility, lubrication, installation and operating performance.
How do angular contact bearings differ from deep groove ball bearings?
Deep groove ball bearings primarily carry radial loads and can also support axial loads in both directions. Angular contact ball bearings are designed for combined radial and axial loads, with axial capacity influenced by the contact angle. They are often selected when axial stiffness and controlled bearing preload are important.
Can a single angular contact ball bearing carry axial loads in both directions?
A conventional single-row angular contact ball bearing primarily supports axial load in one direction. Applications with reversing axial loads generally need an opposing bearing or a suitable paired arrangement. Double-row angular contact bearings can support axial loads in both directions, subject to their design and load ratings.
Can I pair bearings from different manufacturers or replace only one bearing in a set?
Do not assume compatibility based on dimensions or similar suffixes alone. Contact angle, tolerances, face offsets and preload specifications may differ. For a factory-matched set, replacing the complete set is generally preferable. Individual replacement should only be considered after confirming matching requirements and the condition of the remaining bearings.
Is grease or oil-air lubrication better for high-speed operation?
Neither method is best for every application. Suitable grease can provide effective lubrication within the bearing's specified operating limits. Oil-air lubrication may be appropriate when higher speeds require a controlled oil supply and reduced lubricant churning. Selection depends on bearing size, speed, preload, temperature and the lubrication system; no single speed-factor threshold applies to all bearings.
What can cause excessive temperature rise after installation?
Possible causes include excessive preload, unsuitable fits, misalignment, too much or too little lubricant, contamination and an inadequate run-in procedure. Thermal expansion can also change operating preload. If temperature rises abnormally, stop and investigate the installation and lubrication conditions before continuing operation.
What should I check when installing a matched bearing set?
Follow the specified arrangement and the manufacturer's matching marks. Check shaft and housing fits, shoulder squareness, cleanliness and the specified clamping procedure. Apply mounting force to the ring being fitted, not through the rolling elements. Complete the recommended run-in procedure and monitor temperature and vibration before full-speed operation.
Explore More Bearing Solutions
Explore other bearing types for heavy loads, rigid shaft support and precision rotary motion.
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YRT Turntable Bearings
For rotary tables and indexing units carrying radial, bidirectional axial and moment loads.
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Crossed Roller Bearings
For robotic joints and precision rotary mechanisms where mounting space and stiffness are critical.
Explore Crossed Roller Bearings →Need Help Selecting Angular Contact Ball Bearings?
Send your bearing model or dimensions, operating speed, radial and axial loads, and any requirements for contact angle, accuracy, preload or bearing arrangement. TEDIN can review your application and recommend a suitable bearing configuration.