Register Log In



7 - Skate - Hobby

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")
If used in high precision, high speed machinery (see above), these minute variations can make a difference. The fact is that no matter which of these bearings you use in skates or skate boards, after 5 - 10 minutes of use the tracks won’t just be eccentric, they will become damaged enough to be indistinguishable from one another. Your high priced ABEC 9 bearing might as well be a 50 cent ungraded cheapie.

Previous Skate Index Next

You can purchase online at Bearing Shop Online Online.

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

Hobby and Engineering Supplies lists a smaller range of products and only the most popular items in each range. They also list many additional hobby specific categories.

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 Hobby - Skate

Click Page Banner Below

Top

Other Hobby Pages

Click Page Banner Below

Top

Main Pages

Click Page Banner Below

Top










Top



Freight Rates
Terms and Conditions
Privacy Policy

Bearing Shop Online offers 25249 products in 534 categories including ball bearings, roller bearings, thrust bearings, ceramic and ceramic hybrid bearings, stainless steel bearings, miniature bearings, linear bearings, shafting, oil seals 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.

Bearing Shop Online is part of MBA Group offering a select range from the MBA Group catalogue.

Bearing Shop Online products are not authorised for sale into the USA or Canada due to the reluctance of Australian insurers to provide product liability insurance into those two countries.

Information on this website is Copyright Bearing Shop Online 1997. All rights reserved.