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HobbyParts 7 - Skate - Hobby Information
Skate Bearings - Question 7
What are the Abec grades of bearings available. How different are the grades?
You don't need anything higher than ABEC 1 for skating applications. The precision grade only tells us how close the tolerances are (ie, how close the bearing is to the stated size). There are many other factors relating to the quality of a bearing that will have more impact on your skating experience than the ABEC Grade of the bearing. But if you are still curious - here are the grades...
From Lowest to Highest
- ABEC 1 Approximately equal to ISO P0
- ABEC 3 Approximately equal to ISO P6
- ABEC 5 Approximately equal to ISO P5
- ABEC 7 Approximately equal to ISO P4
- ABEC 9 Approximately equal to ISO P2
There are a number of factors covered by the ABEC grades, but to give you an idea we will just examine one of these factors - the eccentricity (out of roundness) of the track in the inner ring. For an ABEC 1 (lowest grade) bearing, the maximum eccentricity allowable is 0.0075 mm (0.000295"). This is quite precise - more than precise enough for skates and skateboards. The figures for other grades are
- ABEC3: 0.005 mm (0.000197")
- ABEC5: 0.0035 mm (0.000138")
- ABEC7: 0.0025 mm (0.000098")
- ABEC9: 0.0012 mm (0.000047")
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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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