drilling shift knobs, then fixing them, then drilling them again....

I have a McPhail shift knob that I drilled long ago and screwed it up. Now, I have this knob with a gian hole in it that I want to use. What's the best way to fill the hole, then drill it again. Also, what do you insert into the knob for it to screw onto the shifter?

Thanks HAMBers....

 

Drill your screwed up hole even bigger, and tap it. Then make a bushing that screws into the large hole, with a smaller tapped hole in it to fit your lever.

 

could have a machinist make a threaded bung to epoxy into the oversized hole

 

Well, I'm not sure that I can make the hole any bigger... When I originally drilled the hole, the inside of the knob was almost like powder. There was no way I could tap it, so I enlarged the hole to try to fill it with something and "implant" a nut in there. Didn't work. I think I may have killed a really cool knob. Can I use some type of plaster to fill the hole?

 

jb weld, or similar. then drill and tap the epoxy

 

epoxying your bung sounds like the sure thing to me
and yes i understand how that sounds so shut up

 

JD weld is awesome. Hardens like steel.

 

I made a shift knob out of an old pool ball recently. At the hardware store I found a threaded br*** bushing thing with the right 5/16" co**** threads on the inside, and large wood screw type threads on the outside. It's made for woodworking projects where you want to have reliable metal threads in something made of wood. It has two notches so you can use a large screwdriver to screw it into a large hole in wood.

I put a piece of tape on the back side of the bushing, and filled it with candle wax that I dripped off a lit candle. Then I drilled a hole in the pool ball just a hair under the O.D. of the br*** bushing. Then I mixed up some J.B. Weld epoxy and slathered it all over the outside of the threads of the bushing and inside the hole in the pool ball. Then I screwed the bushing into the pool ball. When the epoxy was hard, I used a toothpick to dig the wax out of the threads and cleaned it up with a bottoming tap. Then just spun it onto the shifter with a lock nut underneath to keep it aligned where I wanted it.

 

JB weld We used to patch drums on ready mix trucks with it. Boss was cheap. It will harden enough to drill.

 

Stick Epoxy ive used it on steering wheels and genuine 8-ball knobs and had no problem, never had to paint it though

 

is the hole bigger than 16mm? gennie shifter knobs are 16mm with an aluminum insert that comes in a number of different in side threads.

 

Thanks for that. You just brightened my day a ton!!

 

Big Mac:

If you pay for the Postage to and from I will fix that for you . No Prob.

Will send you a PM......

 

I had an 8 ball shifter knob that used to spin on the shifter, so i filled the hole with areldite(not sure if spelling is correct) and stuck it on the shifter. Only problem is, it's kinda permanant.

 

I like the way you think, why didn't I think of that