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Old 11-18-2010, 02:11 PM   #1
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Bearing Identification


I am in need of about four flat idler pulleys. They are no longer available and I have searched extensivly! All have bad bearings that are sandwiched between the pulley halves. I removed the rivets and found the ball bearings have no identification numbers.
They are 1.575" OD by .500" thk. and the ID is 3/8" that a 3/8 bolt passes through.
What do you call a bearing like this that doesn't have a precision ID?

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Old 11-18-2010, 02:17 PM   #2
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Bearing Identification


Do you have a "motion industries" local to you? I use them for work all the time. Just take the bearing in, they measure it with calipers and find me a substitute. www.motionindustries.com

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Old 11-18-2010, 06:59 PM   #3
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Bearing Identification


Sounds like a very common bearing. Should not be a problem to find.
Try this catalogue. It will help you figure out which type of bearing and then which actual bearing you need.

http://www.ntn.ca/products.htm

Seems most bearings are metric sized. Are you certain there are no numbers on the side of the race or the seal?
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Last edited by joed; 11-18-2010 at 07:26 PM. Reason: forgot to add link
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Old 11-18-2010, 09:17 PM   #4
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Bearing Identification


Quote:
Originally Posted by joed View Post
Sounds like a very common bearing. Should not be a problem to find.
Try this catalogue. It will help you figure out which type of bearing and then which actual bearing you need.

http://www.ntn.ca/products.htm

Seems most bearings are metric sized. Are you certain there are no numbers on the side of the race or the seal?
I have worked with many different type bearings, these are the only ones that don't have a number anywhere. The inner race is 3/8" and is not insrted. I checked with a magnifying glass and strong light. I think some changes must be made in order to use other flat pulleys.
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Old 11-18-2010, 09:54 PM   #5
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Bearing Identification


Metric OD and inch ID, does not sound like I standard bearing to me. My guess is that the idler pulley manufacturer had those made up special for him. Is the width of the bearing 1/2" or 12mm ? A 6203-2Z ( 40mm OD by 17mm ID x 12mm wide will be readily available, but you would have to bush the ID
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Old 11-19-2010, 11:26 AM   #6
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Bearing Identification


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Metric OD and inch ID, does not sound like I standard bearing to me. My guess is that the idler pulley manufacturer had those made up special for him. Is the width of the bearing 1/2" or 12mm ? A 6203-2Z ( 40mm OD by 17mm ID x 12mm wide will be readily available, but you would have to bush the ID
I think I'd just use a larger bolt instead of a bushing.

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