[ToyMaker]

ABEC stands for Annular Bearing Engineers' Committee. This
committee works to determine the standards for bearings for
the Anti-Friction Bearing Manufacturers Association (AFBMA).

The ABEC scale classifies different accuracy and tolerance
ranges for bearings. The first column of this table lists the five
ratings in the ABEC scale.

 ABEC Ratings   ISO Class
 ABEC1            Class 0
 ABEC3            Class 6
 ABEC5            Class 5
 ABEC7            Class 4
 ABEC9            Class 2

The ABEC rating of a bearing is determined by the following
(for a 608 size bearing):

How close the bore is to 8mm in microns
How close the outer diameter is to 22mm in microns
How close the width is to 7mm in microns
The runout in microns

The second column of the table lists the corresponding tolerance
classes as defined by ISO, the International Organization for
Standardization. Both systems are widely used in the bearing
industry but ABEC has been adopted by skate manufacturers.

Does ABEC affect the speed of your machine?
No. Not unless your table is moving at 330 mph. That's based on
a 608 bearing limiting speed of 32,000 rpm. Only in extremely high
speed applications like ultra high speed motors and precision
measuring instruments can bearings above ABEC 1 affect performance. Regardless of how fast you plan to go, speed is affected first
and foremost by the motors and drives.




robotic regards,

Toymaker
= = = = =
"Our simplest perfection as human beings is simply being human."
- - John M. Kohlenberger

www.wallaceoperation.com

[ironDigit]

Hmmm this seems like very usefull info there toymaker thx.

could some1 fill us in how close the abec's 1 to 9 actually are in microns ?

And maybe even why iso'seem to be mixed from this side

again thx in advance guys.

[ToyMaker]

ironDigit:

I spent a few minutes with Altavista and found this
www.roll-duke.nl/onderhoud.htm
Google abec1 abec2 abec3 or abec-1 abec-2 abec-3 and you will find loads of information (although I never did find a listing of tolerances in microns)


robotic regards,

Tom
= = = = =
"We are born into this world with a body and no name and we leave this world with a name and no body."
- - Dr. Garrett S. Thurston

www.wallaceoperation.com

[ToyMaker]

and the Wikipedia link is:
http://en.wikipedia.org/wiki/ABEC_scale


robotic regards,

Tom
= = = = =
"A city of capital, not a capital city."
- - Edwin G. Burrows and Mike Wallace

www.wallaceoperation.com

[sk8nmike]

The above comment is correct about ABEC ratings on bearings.

Let me give you this from the perspective of an inline skater. Bearings used in Skate Wheels are measured by the ABEC standard from ABEC 1 to 9. For the average 150 lbs recreational skater ABEC 5 bearings are find, they roll smooth and easy. As this same skater progressed into Fitness skating they would want to move to abec 6 or 7 as the 5's would not roll well at the higher speeds, again the same skater competing in a race would want ABEC 9 or higher bearings to eliminate as much friction as possible (most pro skaters will not put oil in their bearings as this adds friction).

[RICHARD ZASTROW]

ABEC 9 is the highest grade and VERY $$$$$$$$$$$$$

Dick Z