Hi folks,
I have a 4" cast iron wheel which I'm using as a drive wheel for something. It's originally a castor and so is quite imprecise, it features a needle roller bearing which takes a 20mm shaft that is at least 5 degrees off axis. As it happens I want it to be fixed to the shaft too, so...
I hammered the needle bearing out and I'm left with a bore of about 30mm.
I want to bore this out a few more mm to ensure it is aligned properly, then press in a new steel 'hub' which I can bore out to accept a 20mm shaft again.
Because this is going to be a drive wheel and under a fair bit of force at times I'm concerned about ensuring this hub remains put.
My guess is to mechanically link them by drilling and tapping 4 holes around the interface (ie half the thread in the iron, half in the steel) but this will take a while to do and if I'm not accurate will contribute to the already bad balance (which I'll try to rectify later).
If anybody has any better suggestions I'd be interested to hear em
