Gallery, Projects and General > How do I??

Turning a bearing

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kayzed1:
I do like that, i have one or six very old engines running around with very odd bearings in them...but haho they are still on the road.
Lyn.

vintageandclassicrepairs:
Hi All,
Thanks for the kind words. they are needed !!!
Every part I turn to needs work  :bang:
The aim is to get the flywheels and conrods central in the cases with about 5 thou end clearance
The original bearing housing is approx 20.6mm (13/16in.) and the new bearing is 18mm wide
so a spacer is needed, I am trying to see if I can fit a custom seal into this spacer, maybe move the bearing 1mm towards the flywheels to gain some space in the housing?
The original setup was a tin hat that held a felt washer, 4 screws hold it to the outside of the engine

I'm just in from measuring up the different parts, the width between the case bearing housings is  0.240in more than the width of the flywheel assembly,
The old bush I removed today has a 0.090in. thick thrust face, A thin shim was fitted between it and the flywheel (forgot to measure it!)
I have a new bush turned up but needed to do the measurement's to calculate the thrust collar thickness before parting it off,
A good sleep and things might look better tomorrow !!
John

vtsteam:
Would there likely be enough miles on it again to ever replace the bearing, in the coming era of autonomous vehicles? And if there were that much wear, won't there still be people with lathes and brains to fix it again? Hmmmm. Maybe I shouldn't ask...... :wack:

Nice job of work!  :beer:

Pete49:
Going from what I see lathes will only be seen in museums and brains?? well maybe rent them out once more than motor functions are needed  :)

vintageandclassicrepairs:
Hi All,

--- Quote ---Would there likely be enough miles on it again to ever replace the bearing
--- End quote ---

The bronze bush on the timing side of the engine was either the original or when replaced they managed to use the original hole for the dowel pin that prevents the bush from turning in the housing, (almost impossible to do and not recommended)
I have machined the bush, cut the oil grooves and fitted it to the case,
I do not have a suitable pilot to fit the expanding reamer that will line ream the bush to the roller bearing, the bush bore will not be a "standard" size, I need to machine one up as time is pressing
Honing to size might be preferred to reaming, but this would need special tooling (that I do not have)

The engine and motorcycle are being prepared for the 2018 USA Motorcycle Cannonball event
It will cover almost 4000 miles from Portland Maine to Portland Oregon
Average daily mileage approx 350
This is a fairly serious ask of 95 year old mechanical components,
It will be put together with the best available parts and attention to detail that I can achieve

John

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