THE RIGHT MIX OF BUSINESS AND PLEASURE
HobbyParts Closures - Bearings - Technical Information
Bearing Closures (Seals / Shields)
Seals and shields are situated between the inner and outer rings of the bearing. The purpose of seals and shields are to protect the inside of the bearing from contaminants and to help prevent the leakage of lubricant from the bearing.
Shields are made from steel or stainless steel. Shields do not contact the inner ring of the bearing and therefore do not increase the running torque. Shields can be either crimped into the inside of the outer race (type ZZ) or held in the outer race by circlips (type ZZS). The ZZS type are removable to allow inspection and maintenance of the bearing. RMB Filmoseal is a type of shield which utilises a film of lubricant between the inner race and the specially designed shield to more effectively exclude contaminants.
Seals are usually made from nitrile. Seals are either contact (type 2RS) or non-contact (type 2RU). Contact type seals which are secured within the outer race and contact the inner race greatly increase start up and running torque, thereby reducing running speed. They also provide a very effective method of excluding contaminants and retaining the bearing lubricant. Non contact seals have minimal contact with the inner race. They provide very effective sealing whilst allowing the bearings to operate at higher speed than contact sealed types. Standard Nitrile seals have a maximum recommended temperature of 100o Celsius (212o fahrenheit). Some bearings are also available with PTFE seals offering very effective sealing whilst minimising torque. PTFE seals can operate at temperatures up to 300o Celsius (572o fahrenheit). Note however that whilst the seals can withstand these temperatures the bearing itself will need special treatment if it is to be used at any temperature greater than those shown in our materials section. For special orders, Viton seals may also be available (temperatures up to 230o Celsius (446o fahrenheit).
Viton seals may also be available for special orders. Viton seals can withstand temperatures up to 230o Celsius (446o fahrenheit). Viton seals are usually used with Stainless Steel bearings and a high temperature grease (such as Mobiltemp SHC32 100) to ensure maximum performance. However, the temperature range of the viton seal extends well beyond the recommended temperature range of the Stainless Steel bearing material, so operating temperature will be restricted to that of the bearing material.
 |
 |
 |
Open |
Sealed |
Shielded |
Log in and start browsing the HES Online Store.
H.E. Supplies Main Pages
Home
Catalogues Index
Catalogue A-Z Online
Catalogues A-Z PDF
Charity
Contact Us
Dental Bearings
Freight Rates
Hobby Information
Home
Information Sheets
Mailorder
Online Catalogue
Online Catalogue - Accessories
Online Catalogue - Batteries
Online Catalogue - Boats
Online Catalogue - Cars
Online Catalogue - Car Parts
Online Catalogue - Engines
Online Catalogue - Engine Parts
Online Catalogue - Games
Online Catalogue - Helicopters
Online Catalogue - Heli Parts
Online Catalogue - Materials
Online Catalogue - Planes
Order Specially Quoted Parts
Payment Options
Quick Guides
Search
Technical Information
Terms and Conditions of Sale
Recommended Links
Couplings Information
eParcel Tracking
Express International Tracking
Jokes and Trivia
Logan City Radio Controlled Car Club
Materials Information
Miniature Bearings Australia
Ondrives UK
Rino UK
Shafting Information
Small Parts and Bearings Online
Stainless Selection
Tingalpa Model Aero Club
TNT Freight Tracking
Unfair Contracts
Wikipedia
Windows to The Universe
World Time
Technical Index
Product Technical Information
Balls |
Bearings |
Couplings |
Pins |
Shafting |
Timing Belts and Pulleys |
Other Technical Information
Basic Information Sheets |
Catalogues |
Glossary of Technical Terms |
Links to Further Information |
Materials Information |
Measurement Conversions |
Skate Bearing FAQ |
Technical Information Sheets |
Tables and information on this web site should be read as a general guide only. The relevant standards should be consulted to ensure accuracy
There are no further parts to this document.
Site Summary:
H.E. Supplies (Hobby Engineering Supplies) offers thousands of products including remote controlled cars, planes, boats, and helicopters. We stock spare parts for remote controlled models. Our range includes the popular Solarbotics solar model kits and spares. We also distribute the full range of miniature engineering products from Miniature Bearings Australia. This range includes small bearings, timing pulleys, timing belts, seals, o-rings, gears and more. Also available from our store in Mansfield Queensland are a full range of lubricants, adhesives, kites, balsa wood and plastic rod and sheet materials. See our Online Catalogue for more information. Our main business is handled from our sales counter and showroom at 186 Wecker Road Mansfield, Queensland, Australia, but we also sell by phone, fax, online and mail order. We offer all of our hobby parts through our online store and some of the more popular MBA items. If you would like to purchase other MBA items online, Small Parts and Bearings offer the full range in their online catalogue.Using the links at the top of this page you will find extensive information including catalogues (Products and Store link), technical data, and other product specific information.
© Copyright H.E. Supplies Pty Ltd 2008. All rights reserved.