Spigot bush question ?

[Dr_evil]

My input shaft pilot tip is a 19/32nds (.590") now I cant seem to find a bearing to fit this.....so would it be possible to use a 15mm oilite bushing and either ream it out or would the input actually be closer to the .590" at 14.8mm and mean that I can actually use the 15mm with no problem ?

I know this is a vernier job really but I don't have one on me! And if it is indeed bang on the 19/32nds what kind of size do I need to order as in what is the usual clearance between pilot wall and bearing wall ?

 

[Thor1950]

Chunk of phosphorus bronze make it your self

 

[Thor1950]

not another thread in your build. couldn't keep in 1 as it would be easier to follow?

 

[jamesmartin]

you could use a bush, it only shaft only tuns in it when clutch is depressed ,2 thou ish

 

[Dr_evil]

Yes but thor thats not the question I'm asking what clearance I'd need top put in if I was to make it or buy an off the shelf one from a shop

I can get hold of a 15mm internal one and ream it out by .1mm or then again I could 15.88mm internal bore and use that which would give me a bit of leeway either side but I'm not sure just how tight it wants to be!

 

[easye1]

OK, do I read this right?
your shaft dia in within 0.2 mm of being a size for size fit?

would your bearing be a tight fit in the end of the crankshaft ?
thinking if it Is, then it may crush down a bit on bore dia ?

time you soak the bearing in a bit of oil (try ep140) the thicker the better,
before fitting, then It`ll be nice....

but as ever, tis only my opinion...

 

[Dr_evil]

you could use a bush, it only shaft only tuns in it when clutch is depressed ,2 thou ish

Sorry I did mean bush, I've been reading too many american pages to do with the gearbox :doh: they call them pilot bearings or bushings depending on the site

2 thou is a lot less than the 15.88 in that case, looks like I'd be better off reaming out one in that case and just trying to get it to a snug fit

 

[Thor1950]

Sorry I did mean bush, I've been reading too many american pages to do with the gearbox :doh: they call them pilot bearings or bushings depending on the site

2 thou is a lot less than the 15.88 in that case, looks like I'd be better off reaming out one in that case and just trying to get it to a snug fit

slip fit, should be able to slide on by hand, need a little space for oil/grease when fitting, don't want dry fit

 

[Dr_evil]

well the 15.88 one would give me .4mm either side of the pilot tip or 15.75 thou which seems a bit too much ?

 

[jamesmartin]

well the 15.88 one would give me .4mm either side of the pilot tip or 15.75 thou which seems a bit too much ?

ideally it is

 

[jamesmartin]

Sorry I did mean bush, I've been reading too many american pages to do with the gearbox :doh: they call them pilot bearings or bushings depending on the site

2 thou is a lot less than the 15.88 in that case, looks like I'd be better off reaming out one in that case and just trying to get it to a snug fit

a good few engines do use bearings not bushes

 

[Dr_evil]

ideally it is

Hmm, I could fit the 15.88 and then a speedi sleeve on the shaft in order to get it up a couple of thou so its a better fit ?

 

[Dr_evil]

OK, do I read this right?
your shaft dia in within 0.2 mm of being a size for size fit?

would your bearing be a tight fit in the end of the crankshaft ?
thinking if it Is, then it may crush down a bit on bore dia ?

time you soak the bearing in a bit of oil (try ep140) the thicker the better,
before fitting, then It`ll be nice....

but as ever, tis only my poinion...

The shaft is 15.08 (apparently) I need to put a vernier on this to make sure that it is definitely 19/32nds and not .590 as .590 would make it a perfect fit for the 15mm bushing!

If it is the 19/32nds that'd be 15.08mm and I'd have to ream out a 15mm bush and try to get it right, the crankshaft is being modified to fit the bushing anyway as theres currently no hole in the back so a 15mm deep hole will be drilled for whatever bushing I buy

The problem is I cant find a bushing that'll fit so it seems to be a case of best fit

 

[jamesmartin]

Hmm, I could fit the 15.88 and then a speedi sleeve on the shaft in order to get it up a couple of thou so its a better fit ?

unusual but possible ,its to maintain input shafts alignment when clutch is depressed and clutch plate could move ,as if it moved out when you released clutch it would be transmitting torque misaligned and effect on teeth plus bearing ,when clutch isnt depressed theres no force on bush so may well be ok

 

[Dr_evil]

unusual but possible ,its to maintain input shafts alignment when clutch is depressed and clutch plate could move ,as if it moved out when you released clutch it would be transmitting torque misaligned and effect on teeth plus bearing ,when clutch isnt depressed theres no force on bush so may well be ok

Hmm, will see if I can get a vernier on it then and hope its a .590 if not I'll have to make a custom bush up from the sounds of things

 

[jamesmartin]

Hmm, will see if I can get a vernier on it then and hope its a .590 if not I'll have to make a custom bush up from the sounds of things

i would

 

[Dr_evil]

Found a site in the states that sells them!


Pilot Bushing


Be a long wait to get it here though :/ was wanting to get the crank machined to fit it this week!



EDIT: Like Fcuk I'm paying $35 to ship a spigot bush via Fedex! What the hell

 

[Thor1950]

Found a site in the states that sells them!


Pilot Bushing


Be a long wait to get it here though :/ was wanting to get the crank machined to fit it this week!



EDIT: Like Fcuk I'm paying $35 to ship a spigot bush via Fedex! What the hell

I know a guy that could ship it for about $20 approx or less and about 5-6 days

 

[Dr_evil]

I know a guy that could ship it for about $20 approx or less and about 5-6 days

Its cool, I've ordered my entire clutch set up now so its on the way!

Shipping and import came to about $200 which wasn't so bad on a $450 order went with a Centreforce Dual friction 12" clutch

 

[Thor1950]

Its cool, I've ordered my entire clutch set up now so its on the way!

Shipping and import came to about $200 which wasn't so bad on a $450 order went with a Centreforce Dual friction 12" clutch

That is a high performance, high HP clutch system. That Cadillac does not meet the requirements of high hp, and your series is defo not a high performance vehicle