angular contact ball bearings

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angular contact bearings

Angular Contact Bearings,Angular Contact Ball Bearing,Miniature Sealed Contact Roller Bearing - PYC

PYC bearing is a specialized manufacturer of angular contact ball bearing,angular contact bearing,angular contact ball bearings,angular contact bearing,miniature angular contact bearing,sealed angular contact bearing,angular contact roller bearing.

Product Tables

Miniature Angular Contact Bearings Bore sizes 6mm to 9mm

Single Row Angular Contact Bearings Bore sizes 10mm to 300mm

Double Row Angular Contact Bearings

Four-Point Contact Bearings

In addition, you can see the Bearings Tables of our other products here.

 

Manufactured to the same close tolerances as the radial type, but designed with contact angles of 15, 30, and 40 deg to accommodate greater thrust loads.

A common choice, at higher precision levels, for applications such as machine tool spindles where both accuracy and high thrust loads are present. They are typically mounted in pairs, providing thrust capacity in either direction and good rigidity for applications where shaft movement is critical.

Double row assemblies offer shaft rigidity, compactness, and higher radial capacity as well as moderate thrust capacity in both directions.


(A). Single row angular contact ball bearings:

Single row angular contact ball bearings can carry thrust load in one direction only, and should always be adjusted against another bearing which accommodates the opposed thrust load. Single row angular contact ball bearings are no separable.

Spindle bearings are a special design of the single row angular contact ball bearings; they were developed primarily for high-speed work spindles of machine tools. The spindle bearings differ from the angular contact ball bearings by the contact angle, the degree of accuracy, and the type of cage. Spindle bearings are manufactured in series 70 and 72. They are identified by a bearing number commencing with a B.

(B). Double row angular contact ball bearing:

The design of the double row angular contact ball bearing corresponds to two single row angular contact ball bearings arranged back to back. The bearing is capable of carrying high radial loads and thrust loads in both direction. It is particularly suitable for applications calling for high axial rigidity.
 
Double row angular contact ball bearings with unsplit rings are provided with filling slots on one side. The bearings should be mounted in such a way that the main loads are carried by the raceways without filling slot.
Design Attributes
    * Specific geometry of angular contact bearing raceways and shoulders creates ball contact angles that support higher axial loads.
    * Expanded options include special lubricants, cage materials, preloads and coatings for additional corrosion resistance.
 
Applications
Angular contact ball bearings are engineered for use in high-speed, high precision applications for:
    * Agriculture
    * Chemical
    * General industry
    * Utilities

Selecting angular contact ball bearings:

In order to select angular contact ball bearings a few application details have to be known.
a) Minimum and maximum shaft speed
b) Intended method of lubrication, i.e. oil drip mechanism, oil mist, grease only etc
c) Maximum Axial and radial loads
d) Life requirements
e) Shaft dimensions and shaft material
f) Housing dimensions and housing material
g) Contamination possibilities
h) Ambient temperature and local working temperature
i) Maximum shaft deflection / movement

From this information the following can be ascertained.

1) ring sizes and materials and precision
2) cage type
3) ball material
4) contact angle
5) set up, i.e. back to back, face to face, triplex set up etc.
6) complimentary lubricant requirement.
7) preload method (if any) i.e. match ground, spacers, sprung washers etc

Selecting an angular contact bearing for an application can be relatively straight forward. Replacing an angular contact ball bearing with an alternate brand is sometimes more difficult. Switching brands is possible and may well be inevitable at some stage in a machine's life due to original bearing supply problems. Over the years AHR International have specialised in offering alternative angular contact solutions. We only use reputable brands such as RHP Precision, Fafnir, SNFA, SNR, NTN, Barden, FAG, INA, IRB etc. Most of these brands have a high degree of product overlap and it should be possible to find alternate brand matches which are suitable for your application.

Care has to be taken with contact angles, cage materials, ball compliment, precision etc and each customer case is individually assessed.


Here are a few typical questions we are often faced with concerning angular contact bearings.

Can I replace my angular contact with a higher precision?

Yes, but beyond ABEC 7 (ISO P4) this could be an expensive option. Whilst you can increase precision you should never decrease precision as running accuracy could be detrimental to the performance of your machineries.

Can I use a grease instead of oil lubrication?

If your machinery is set up to use an oil drip feed, oil bath or oil mist system then you should NOT change this method of lubrication. Oil systems allow a bearing to achieve higher rpm values. Oil allows for efficient cooling of the bearing and is sometimes used for removal of waste material.

I've heard of sealed angular contact bearings. Can I use these?

Either ask AHR or your OEM. It may be possible but please bear in mind that most sealed angular contact ball bearings have some form of heavy oil or grease lubrication inside which may not be suitable for your application.

Can I use a bearing with a higher or lower contact angle than my existing bearing?

Either ask AHR or your OEM. Whilst increasing the contact angle will give more thrust load capacity it will be at the expense of radial load capacity and shaft speed. It is possible your application could withstand this but consultation should take place before making such a move.

Can I mix single angular contact bearings with match ground bearings?

No, match ground bearings are as the name suggests, had their faces ground to match one or more other bearings. This precision grinding allows this matched ste to be fitted and run with a pre-ground preload.

Can I use a different preload value than the one originally specified on my bearing?

As a rule no you cannot. The preload originally specified is important to your application and changing this to a higher or lower value could have serious consequences to the running accuracy and/or life of your equipment. Although in cases of short supply it is possible to get the bearings re-ground to change their preload but only from lighter to heavier.

Will ceramic balls increase the life of my bearings?

Ceramic balls are primarily used for high speed applications. Their lower mass gives lower centrifugal forces thus higher speed capabilities. Their stability over wide temperature ranges is very high allowing them to work in extreme hot and cold environments.

Can I have a full complement angular contact?

Yes, although high speeds are normally out of the question due to the ball to ball contact, i.e. for a given speed of 50,000 rpm the ball to ball contact speed is 100,000 rpm.

I have a match ground triplex set of bearings and one of the bearings has failed. Can I replace just the failed bearing?

No, as the name suggests these are match ground. If you introduce another bearing which is not ground to suite the others in your applications you could end up with more problems than just a broken bearing! Always replace as a set.

Can I change lurbicant types?

Only under advice from your OEM. Please bear in mind any warantee you may have on your equipment before making any form of modification.

Can I switch cage types?

Most angular contacts have some form of phenolic cage. Their are many cage types and materials avialable and both should not be changed from the original specification.

 


 

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