HobbyParts 12 - Skate - Hobby Information

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HobbyParts 12 - Skate - Hobby Information

Skate Bearings - Question 12

I have read something about a skate's wheels spinning faster than an Indy Car, and they even "prove" it with a mathematical formula - Is this true?

Yes. A skates wheels can easily get up to 2-3 times the RPM (revolutions per minute) of an Indy Car wheels. We will bet that what you read did not mention that this is still well within the capabilities of the 608 bearing. Speed is not one of the problems faced by skate bearings - lack of lubrication, contamination, moisture and the unavoidable shock loads associated with skating are the biggest problems. Be very wary of anyone trying to tell you that Skating is a high speed application for a bearing - it isn't.

An example of how non technically minded these marketing people are is that the "Indy Car Formula" that we were supplied with shows forward momentum being the product of the Radius of the Wheel and RPM. It only takes a little logic to realise that one turn of a wheel does not move the skate forward by the distance of its radius but rather by its circumference. However, using this incorrect formula in the above analogy will still get you the relationship of the skate wheel speed to that of the Indy Car. Whilst the formula is incorrect, the analogy is still correct - albeit irrelevant.

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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.

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