About Us Brands Contact FAQ Freight Payments Products Search Site Counter Sales Technical More Links...

Massive Hobby Parts Sellout!

Hobbyparts.com.au is selling off all hobby specific items at extremely reduced pricing. Please browse the website for special pricing on all items. Small Parts and Bearings will be taking over any non deleted ranges.


Speed - Bearings - Technical
Hobby and Engineering Supplies

Bearing Speed / Limiting Speed

Limiting speed is the speed at which a bearing can operate at light loads and normal operating conditions without failing prematurely. It is a guide only. Application speeds can vary greatly.

Bearings in dental handpieces often run at speeds of up to 3 times their limiting speed, however they are not expected to last as long as bearings in less demanding applications.

Published limiting speeds apply to applications involving a rotating shaft. Speeds for applications involving a rotating housing can be up 30% lower.

Many factors combine to affect the attainable speed and expected life of a bearing. Factors affecting speed and life include ...

Load

The limiting speed of a bearing is based on lightly loaded running conditions. Increasing the load will adversely affect the attainable speed and/or bearing life. An increase in either load or speed may sometimes be compensated by a decrease in the other resulting in a similar life expectancy.

It is important to note that a deep groove radial ball bearing should not be subjected to undue axial loads, and axial type bearings (such as angular contact or thrust bearings) should not be subjected to undue radial loads.

Vibration

Vibration can be a major factor in bearing failure by causing brinelling or flaking of the races. If your bearings are operating under vibratory conditions you will not be able to achieve the same speeds that you could under perfectly smooth conditions. Attempting to increase speeds under vibratory conditions will quickly lead to bearing failure.

Lubrication

Lubrication is a major consideration with regards to bearing speed. We list a limiting speed for both standard oil and standard grease lubrication in our datasheets which are available by contacting our sales department.

Oil lubrication generally achieves higher speeds than grease lubrication. Increasing lubricant viscosity will reduce the permissible speed, whilst decreasing the viscosity will increase the permissible speed. Oil mists are used for very high speed applications. Use of silicone based oils and greases requires lower speed.

Cage Type

Often, the first part of a bearing to fail under high speed is the cage. The use of a synthetic cage designed for high speed helps to correct this. Synthetic cages are made from a variety of material including nylon, polyamide and phenolic. Our datasheets show the limiting speed allowing for each bearings cage type. These are available by contacting our sales department by email.

Temperature and Clearance

Low or high temperatures can adversely affect bearing life. Low temperatures can cause components to become brittle and lubricants to harden. High temperatures can cause parts to bind due to expansion and lubricants to melt and evacuate the bearing. These effects can be somewhat controlled by use of an adequate high or low temperature lubricant and purchasing bearings with increased internal clearance to allow for expansion.

Moisture and Contaminants

Strict cleanliness is essential to the correct functioning of bearings. Bearings requiring contact with excessive moisture or even lubrication by water should be made from 316 stainless steel, acetal or even full ceramic. These materials are only suitable for low speeds and loads.

Mounting

Correct mounting is essential to the correct running of the bearing. A poorly aligned assembly, or incorrect housing/shaft tolerances will result in slower attainable speeds and premature failure. Incorrect housing/shaft tolerances can result in a lessening of the bearing internal clearance.

Precision

The use of higher precision may be suggested if the bearing is to run at speeds above the standard limiting speed. Hobby and Engineering Supplies limiting speeds are already adjusted to take consideration of this effect.

Closures

Contact seals reduce the speed capabilities of a bearing. Hobby and Engineering Supplies limiting speeds are already adjusted to take consideration of this effect.

You can find many types of bearings in the Hobby and Engineering Supplies Bearings Online Catalogue pages.


For a huge range of bearings online please visit the Bearing Shop Online Website.

The Small Parts and Bearings has a much larger range of engineering supplies.

For the best range of miniature and small bearings please try the Miniature Bearings Australia website. Miniature Bearings Australia also list a large variety of miniature engineering products.



Other pages related to Technical - Bearings

Click Page Banner Below

Top

Other Technical Pages

Click Page Banner Below

Top

Main Pages

Click Page Banner Below

Top





Top



PRODUCTS

Accessories Adhesives Balsa Batteries Bearings Automotive Books Bottles and Cans Brushless Motor Be... Cable Ties Carburettor Parts Castors Circlips Cloth Clutches Collars Collectibles Dental Handpiece P... Disk Cleaning Machine Dubro Accessories Educational Projects Electrical Wire Engineering and Ho... Epoxies Fishing Reel Parts Foam Food Processor Parts Fuel Gadgets Games Amusement Games General Gearbox Parts Hobby Accessories Hobby Gears Hobby Motors Hobby Servo Motors Hobby Shafting Hobby Wheels Jigsaws Jockey Wheel Thrus...

Paypal Accepted
Paypal
Secure Checkout
See PAYMENTS


Kites Knobs Pointer Leads and Connectors Lifting Chain Lights Lubricants General... MRI Table Bearings Magnets Bar Model Car Kits Model Jet Turbine ... Model Personnel Model Planes and H... Modelling Accessories Modelling Paints Nuts Nuts Lock Oil Seals Oils Specialised Parts Boxes Plastic Plywood Power Adaptors Power Tool Parts Pulleys Grooved Pushbike Bearings RC Aircraft Parts RC Bike Parts RC Boat Parts RC Boats and Acces... RC Car Parts RC Engine Parts RC Filters RC Helicopter Parts RC Nitro Accessories RC Nitro Engine Ac... RC Nitro Engine Parts RC Propellers and ... RC Quadcopter Parts Radio Equipment Resins

Visa Card Accepted
Visa
Secure Checkout


Robotic Bases Robotic Servo Motors Rod Ends Screws Screws Self Tapping Seals and Sealing Sets Sheet Shock Absorbers Soldering Spare Parts Special Effects Li... Speed Controllers Spinners Sporting Spray Paint Steam Engine Parts Steam Engines Surplus Stock Swimming Pool Bear... Switches Tape Throwing Planes Tools Bits Tools Cutting Tools General Purpose Tools Pullers Tools Screw Drivers Tube and Tubing Vacuum Cleaner Belts Washers Finishing Wheels RC Plane Wheels and Tyres R...

Site Summary

Freight Rates
Terms and Conditions
Privacy Policy

Hobby and Engineering Supplies offers 2322 products in 238 categories including spare parts for remote control cars, assortment kits, kites, styrene, depron, ceramic and ceramic hybrid bearings, bearings, tools, belts and adhesives - see the full listing in the Online Catalogue. We have excellent Freight Rates within Australia and worldwide. We offer a choice of delivery with a signature required, or cheaper options with no signature required. The no signature required options are at the customer’s risk once the goods leave our store.

Using the links throughout this site you will find extensive information including catalogues, technical data, and other product specific information. We sell our products worldwide through our online store and our overseas freight rates are competitive for fully traceable courier delivery.

Hobby and Engineering Supplies is part of MBA Group offering a select range from the MBA Group catalogue.

Information on this website is Copyright Hobby and Engineering Supplies 1997. All rights reserved.