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carisbrook1
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Join Date: Mar 2016
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Bearing Speeds

03/21/2016 11:30 AM

Hi Guys.

At what rpm does a bearing become classified as high speed?
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PWSlack
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#1

Re: Bearing Speeds

03/21/2016 11:36 AM

That is a good question to ask a bearing manufacturer's Technical Helpline.

CR4 does not offer training in the use of the telephone.

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carisbrook1
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#4
In reply to #1

Re: Bearing Speeds

03/21/2016 11:55 AM

I would hope it could improve you sarcastic comment though
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Doorman
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#5
In reply to #4

Re: Bearing Speeds

03/21/2016 12:30 PM

"I would hope it could improve you sarcastic comment though"

I doubt CR4 could improve on the comment, whether deemed sarcastic or not.

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lyn
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#7
In reply to #4

Re: Bearing Speeds

03/21/2016 1:08 PM

You came here and asked an elementary question that could have been easily answered by a simple search, or as PWSlack suggested a phone call.

Or both.
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adreasler
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#10
In reply to #4

Re: Bearing Speeds

03/22/2016 9:45 AM

I'm afraid these forums work very well for 'improving' sarcasm; those who are here long enough have their sarcastic abilities honed to a fine, cutting edge.

It's not your fault, you're new here, and you're just one flake. One snowflake can do very little, but when you get many snowflakes together, they become a mass of snow that can crush even the most sturdily built Alpine house.

Those of us who have been here a while have lived through many 'crushed houses,' and some have taken to constantly 'sweeping off the roof' to try and prevent the next one.

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lyn
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#2

Re: Bearing Speeds

03/21/2016 11:44 AM

Google is an excellent resource for this type of question.

Comparison of Bearings - University of Utah
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SolarEagle
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#3

Re: Bearing Speeds

03/21/2016 11:50 AM

Depends on the size...."Anything higher than 3,000 fpm is considered highspeed."

"Keep in mind, however, that low linear speed does not necessarily mean low angular speed. As Fig. 1 shows, a low-speed bearing with a pitch line diameter of less than 1.9 inches can rotate as fast as 1,000 rpm. If, on the other hand, the pitch line diameter is much larger - say, 65 inches - the bearing is considered a low-speed bearing only when the angular speed is less than 30 rpm."

http://www.kaydonbearings.com/downloads/whitepapers/Kaydon-LowSpeedAppsWP.pdf

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dkwarner
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#13
In reply to #3

Re: Bearing Speeds

03/22/2016 11:53 AM

That is so much more appropriate than the previous sarcasm! GA!

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Tornado
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#6

Re: Bearing Speeds

03/21/2016 12:49 PM

Whenever some salesperson wants to call it that.

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Bayes
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#8

Re: Bearing Speeds

03/21/2016 2:20 PM

This doesn't directly answer your question (I think the answer to your question is "it depends on a number of factors...") however it might offer some useful background information:

http://insights.globalspec.com/article/1288/ball-bearings-specifications-and-selection-criteria-for-engineers
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PWSlack
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#9

Re: Bearing Speeds

03/22/2016 9:15 AM

Seen on a label attached to a condom dispensing machine in the Engineering Building at a UK university: "Not to be used above 400rpm".

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adreasler
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#11
In reply to #9

Re: Bearing Speeds

03/22/2016 9:48 AM

I'm not sure what's more disturbing, having one that could move that fast, or having one that ROTATES.

Either way, effin OW!

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PWSlack
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#12
In reply to #11

Re: Bearing Speeds

03/22/2016 10:08 AM

Quite.

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Users who posted comments:

adreasler (2); Bayes (1); carisbrook1 (1); dkwarner (1); Doorman (1); lyn (2); PWSlack (3); SolarEagle (1); Tornado (1)

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