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Anonymous Poster

Formula for Journal Bearing Clearance

01/18/2009 2:48 PM

Is there any formula can be used to obtain bearing clearance as function of shaft dia.,speed, operating temperature,etc.

for gas turbine, the bearing clearance is 0.016 inch for 8 inch shaft diameter. what is the equation been used to calculate this value.

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nick name
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#1

Re: formula for journal bearing clearance

01/18/2009 7:30 PM

c= 0.2% d in this particular case.

There are a lot of docs on google about the subject have a look
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The Prof
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#2

Re: formula for journal bearing clearance

01/18/2009 8:08 PM

As my journeyman on the "spoorweg" used to say, A thou per inch and one for the journal, 2 if it's little.

He also kept telling me that there were 3 ways to do things, the right way, the wrong way and the railway. The newly installed pyrometers for measuring the babbit temperature prior to pouring the bearings were ignored, he used wooden slivers from tomato boxes, dipped them into the molten metal and if the edges just charred black he would pour. What an artisan he was.

I have sent you an email with some more information taken from the Tribology Handbook - Michael J Neale - recommended reading.

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dhayanandhan
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#6
In reply to #2

Re: formula for journal bearing clearance

02/10/2017 11:55 AM

Dear Mr. The Prof

In this thread "Formula for Journal Bearing Clearance" you have responded as follows:

"I have sent you an email with some more information taken from the Tribology Handbook - Michael J Neale - recommended reading"

Pl. post the same message through PERSONAL MESSAGING option where in you can send the mail. I am eager to know/learn/read the same.

Thanks,

DHAYANANDHAN.S
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The Prof
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#3

Re: formula for journal bearing clearance

01/18/2009 8:09 PM

Ooops! If you register I will send you the information, I can not send to "Guest".

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dhayanandhan
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#7
In reply to #3

Re: formula for journal bearing clearance

02/10/2017 12:05 PM

Dear Mr. The Prof,

I am not guest and I am a CR4 MEMER for the past 9 years. I have sent a mail to you through the Personal Messaging option.

Pl. send your reply through the Personal Messaging option.

DHAYANANDHAN.S
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sb
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#4

Re: formula for journal bearing clearance

01/18/2009 11:13 PM

The journal bearing clearances depend on the factore you mantiond along with a few others like journal length, load, vibration, oil characteristics, flow rate etc,

For my ex-organisation, dedicated (in house) softwares are there (I know the existence but being used and developed by our design group so can not be of help there)

However in net one link may be of help - you can buy it if you need-

www.hexagon.de/lg2_e.htm

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dhayanandhan
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#5

Re: formula for journal bearing clearance

02/10/2017 11:44 AM

Dear Friend,

The Bearing Clearance - It is generally 1 Thou per Inch of the shaft dia.

Further pl. open and read the following links which will give more information on this topic.

1. http://www.mahle-aftermarket.com/media/local-media-north-america/pdfs/cl77-1-205r.pdf

2. http://machinedesign.com/mechanical-drives/understanding-bearing-internal-clearance

3. http://www.astbearings.com/ball-bearings-radial-play.html

DHAYANANDHAN.S
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