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Old 12-28-2019, 09:58 PM   #21
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Thumbs up Re: Pilot Bearing Question

Originally Posted by Patrick L. View Post
While most vehicles use a bushing for a pilot 'bearing', most Model As use a ball bearing. I have seen a couple old Fords with a bushing though. A properly oiled oil-lite bushing would work just fine. As you mention, some extra clearance would be necessary.
Mine has a bushing, wasn't aware that they had bearings at one time.
Building a '29 Speedster, the hard way...
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Old 12-29-2019, 11:57 AM   #22
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Default Re: Pilot Bearing Question

Here's what they look like:
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Play it again Sam.
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Old 12-30-2019, 12:58 PM   #23
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Default Re: Pilot Bearing Question

Werner, we have a company called "speedy sleeve." They make hard alloy thin wall sleeves that can be installed with a press fit and/or locktite. Made just for repair of worn surfaces. Somewhere in Germany there must be something like that. I made my own thick wall sleeve to repair my input shaft after turning it down to an under size. The radial load is minimal and the speed differential is also slight and momentary. just needs a good shiny surface with clearance.
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Old 12-30-2019, 02:15 PM   #24
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Default Re: Pilot Bearing Question

Speedy sleeves are primarily for worn seal surfaces.

Most of the shafts I've had repaired for the helicopter transmissions were surface ground on the worn journal then plated back up with hard chrome or Chromalloy. The shaft then went through a relief process to prevent hydrogen embrittlement. It was then surface ground back to its original dimension. This was all a very expensive process but the cost of a new shaft was a lot more. The cost of an input drive shaft for a Model A is likely less than those type of repairs at around $225 US. I guess it depends on how long a person wants to keep running the parts. No matter what, it will cost time or money. I think I'd look for an undrilled phosphor bronze bushing blank and cut it to fit the worn stub. The bronze bushings last better than a lot of folks give them credit for and they won't gall.
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