Oil impregnated bearings - UK Vintage Radio Repair and Restoration Discussion Forum

Tim · 11th Mar 2009, 11:56 am

Hi gang
I have a couple of things with motors either running slow or not running at all, unless they are given some oil. I presume these use are brass(or bronze) oil impregnated bearings(no balls visible).
I believe I can restore these bearings by immersing them in hot oil.
What sort of oil is suitable(3 in one, engine oil?) and approx how long should they bathe? (Never before attempted!!

)
Thanks
Tim

Mods please move if in wrong section.

AlanBeckett · 11th Mar 2009, 12:09 pm

See https://www.vintage-radio.net/forum/...ad.php?t=37877

Tim · 11th Mar 2009, 7:44 pm

Thanks!!
I'll have a go with machine oil. i suppose something like white spirit could be used to wash out.

AlanBeckett · 11th Mar 2009, 7:56 pm

Tim,
Yes, I would think so, although if the pores are clogged up with grease or old polymerised oil, it may not do much good. I didn't totally agree with the previous thread when it said the bush should be removed and then washed etc. These bushes are actually made slightly oversize. They achieve their 'working' size when they're pressed into the correct sized hole. The snag is you can only do it once. On the other hand I don't expect the stresses on it in a record player are very high so it probably won't make much difference if you do take it out. I'd be inclined to put a drop of Loctite on the outide when I put it back.
Alan

kalee20 · 11th Mar 2009, 8:08 pm

Quote:

Originally Posted by AlanBeckett

I'd be inclined to put a drop of Loctite on the outide when I put it back.
Alan

But not if it's a spherical, self-aligning bearing!

AlanBeckett · 11th Mar 2009, 8:34 pm

But then it wouldn't be pressed in would it? They're normally held in place with a hemispherical collar.

kalee20 · 11th Mar 2009, 8:42 pm

Ah! Yes. Sintered sleeve bearings, press-fitted into a precision hole, rather than a sintered spherical bearing held in its housing with a press-fitted diaphragm-type spring!

AlanBeckett · 11th Mar 2009, 10:11 pm

Indeed!

11th Mar 2009, 11:56 am	#1
Tim Dekatron Join Date: Jan 2003 Location: Bradford on Avon, Wiltshire, UK. Posts: 3,310	Oil impregnated bearings Hi gang I have a couple of things with motors either running slow or not running at all, unless they are given some oil. I presume these use are brass(or bronze) oil impregnated bearings(no balls visible). I believe I can restore these bearings by immersing them in hot oil. What sort of oil is suitable(3 in one, engine oil?) and approx how long should they bathe? (Never before attempted!!) Thanks Tim Mods please move if in wrong section. __________________ "Nothing is as dangerous as being too modern;one is apt to grow old fashioned quite suddenly."

11th Mar 2009, 12:09 pm	#2
AlanBeckett Rest in Peace Join Date: Dec 2008 Location: Burton upon Trent, East Staffordshire, UK. Posts: 1,686	Re: Oil impregnated bearings See https://www.vintage-radio.net/forum/...ad.php?t=37877

11th Mar 2009, 7:44 pm	#3
Tim Dekatron Join Date: Jan 2003 Location: Bradford on Avon, Wiltshire, UK. Posts: 3,310	Re: Oil impregnated bearings Thanks!! I'll have a go with machine oil. i suppose something like white spirit could be used to wash out. __________________ "Nothing is as dangerous as being too modern;one is apt to grow old fashioned quite suddenly."

11th Mar 2009, 7:56 pm	#4
AlanBeckett Rest in Peace Join Date: Dec 2008 Location: Burton upon Trent, East Staffordshire, UK. Posts: 1,686	Re: Oil impregnated bearings Tim, Yes, I would think so, although if the pores are clogged up with grease or old polymerised oil, it may not do much good. I didn't totally agree with the previous thread when it said the bush should be removed and then washed etc. These bushes are actually made slightly oversize. They achieve their 'working' size when they're pressed into the correct sized hole. The snag is you can only do it once. On the other hand I don't expect the stresses on it in a record player are very high so it probably won't make much difference if you do take it out. I'd be inclined to put a drop of Loctite on the outide when I put it back. Alan

11th Mar 2009, 8:34 pm	#6
AlanBeckett Rest in Peace Join Date: Dec 2008 Location: Burton upon Trent, East Staffordshire, UK. Posts: 1,686	Re: Oil impregnated bearings But then it wouldn't be pressed in would it? They're normally held in place with a hemispherical collar.

11th Mar 2009, 8:42 pm	#7
kalee20 Dekatron Join Date: Feb 2007 Location: Lynton, N. Devon, UK. Posts: 7,088	Re: Oil impregnated bearings Ah! Yes. Sintered sleeve bearings, press-fitted into a precision hole, rather than a sintered spherical bearing held in its housing with a press-fitted diaphragm-type spring!

11th Mar 2009, 10:11 pm	#8
AlanBeckett Rest in Peace Join Date: Dec 2008 Location: Burton upon Trent, East Staffordshire, UK. Posts: 1,686	Re: Oil impregnated bearings Indeed!