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Machine Shop and Tool Talk

possible to drill hole through a roller bearing race?


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  #21  
Old 10-23-2013, 06:55:41 AM
sdowney717 sdowney717 is offline
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Default Re: possible to drill hole through a roller bearing race?

I have run this for several hours and no grease leaks from the bearing.
That AC seal, the rubber on the end is made from a standard seal type rubber. When I tested it by spinning it on the pulley shaft end with the drill I could tell it would hold up. I was worried it would be too tight as it created some heat from friction. And the seal lip was mostly unaffected. (idea was to wear it down a little for a better fit and also test it)

Regarding the old seal its surface had completely worn away so no sealing at all and was functioning more like a shielded bearing.

What I wonder is what application that AC seal is actually for? I have a 1994 Roadmaster and it uses those metal type seals for the compressor hose port, but it might use the bigger ones. That seal pack had 2 sizes of this seal.

I had called a pump company Depco pumps and they have rebuilt these old Onan pumps using a new bearing and a new type mechanical seal. There quoted price was $550.

You CAN buy a new water pump seal for these. The exact fit is a PS-163 from US Seal Mfg. and it costs $7
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  #22  
Old 10-27-2013, 01:05:59 PM
Lars Lars is offline
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Default Re: possible to drill hole through a roller bearing race?

Although it sounds like the deed is already done, for your information it is possible to drill through a race or in some cases, even a ball bearing. It is called red point drilling. Create a flat spot on the race, and use a good carbide drill bit, and a drill press in overdrive as fast as it goes. Keep in mind that I have never done less than 3/16 inch in this process. Everything solid and square, start the contact and begin increasing pressure until the heat increases to the point that the race actually begins to penetrate. The shavings will be super hot and sharp as carbide burr grindings. Once the penetration starts, it must continue until through. Otherwise the race rehardens and is difficult to change bit angles and restart. Judgment and consistency is paramount. Nasty burr may develop in the inside.
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  #23  
Old 10-29-2013, 10:44:46 PM
KevinGWeq KevinGWeq is offline
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Default Re: possible to drill hole through a roller bearing race?

I dont know if these would drill a bearing ??

But none the less some pretty impressive bits

http://youtu.be/dTGB9Od0ND0

Kevin
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  #24  
Old 10-30-2013, 10:17:51 AM
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Dick Bauer Dick Bauer is offline
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Default Re: possible to drill hole through a roller bearing race?

Have you thought about drilling the shaft with a cross connector hole between the bearing? Just a thought.
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  #25  
Old 10-31-2013, 03:12:05 PM
Lars Lars is offline
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Default Re: possible to drill hole through a roller bearing race?

I would like to see a center punch faze a bearing race. A cobalt bit will do a good job in a plow bolt. Races can be penetrated with a good masonry bit using red point, but the weak point is the silver solder surface area. A balanced diemaker bit is ideal with or without spirals. Straight shank works fine here.
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Old 10-31-2013, 04:10:37 PM
I like oldstuff I like oldstuff is offline
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Default Re: possible to drill hole through a roller bearing race?

He could always take it apart again and have a hole popped into it with EDM.
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Old 11-03-2013, 08:39:54 PM
Dwayne Oxford Dwayne Oxford is offline
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Default Re: possible to drill hole through a roller bearing race?

You can drill races with masonry bits. Need to grind a small flat to get started and be clamped down in drill press. When the point breaks thru you have to be real judicious on downforce. If you hang it' it'll shatter.
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Old 07-01-2017, 06:34:37 AM
sdowney717 sdowney717 is offline
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Default Re: possible to drill hole through a roller bearing race?

Updating this old bearing repair.
It is still working fine.
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  #29  
Old 07-09-2017, 12:53:18 AM
tdmidget tdmidget is offline
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Default Re: possible to drill hole through a roller bearing race?

So you went through all this crap and annoying everyone to avoid a $7.00 seal?
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Old 07-09-2017, 11:44:58 AM
beezerbill beezerbill is offline
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Default Re: possible to drill hole through a roller bearing race?

So...Almost four years and no problems - sounds like you got it. How much run time and how much time in the water?

On an unrelated question - how do these engines put up with salt water run through them all the time?

I, for one, was not annoyed - always like reading about someone pulling of a successful fix with what's on hand.
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