+ or -

[flatheadgary]

could someone tell me what the plus dim would be on the king pin hole on an axle boss if you were to make one for a ford, or chevy or i guess just about any kind. i know i could just measure an axle and pin but, i don't have any right now to measure. i know all the pins for the different cars are all different diameters so i would assume the dim oversize for the pin holes would be about the same. to state this another way, if you make the axle boss' on a lathe, how big would you ream the pin hole out, so the pin would go in like it is supposed to, according to the size of the pin you use.

 

[Tbucit]

.002 or .003 would be fine. It needs to be a good fit but not a drive fit. Just a little more loose than the bushing.

Randall

 

[flatheadgary]

thanks Tbucit, i knew someone would know. this is a great site for the many knowledgable people on it. the reason i wanted to know was, i am going to try and make an axle. i have the lathe and the tube bender and the fish mouth tool. this dim was about the only thing missing. thanks again.

 

[RPM]

A general rule of thumb would be .001 per inch. I make a few king pin bosses for the Ford axles and have made some for the Chevy. I use about .001" bigger than the pin.
I'll drill close to size then use the boring bar to finish the hole.