Best Method of machining a Brake rotor to a smaller diameter?
Best Method of machining a Brake rotor to a smaller diameter?
(OP)
Hello All,
I am in the process of converting my 1978 Honda CB750K Motorcycle to dual front discs. I am using 1977 CB750F2 forks and calipers. I have jumped the first hurdle and determined how much I need to move the K rotors out to match the plane of the F's, but now I face a diameter dilemma.The K rotors are 295mm in dia., while the F ones are 275mm. I am trying to decide between fabricating a relocation bracket for the calipers, or trimming the rotors down. If I cut the rotors down, would a lathe be the best? or a mill? All I know about the metal of the rotors is that it is stainless steel, I do not know the grade. Thickness is 6mm.
Thanks for any info!
Chris
I am in the process of converting my 1978 Honda CB750K Motorcycle to dual front discs. I am using 1977 CB750F2 forks and calipers. I have jumped the first hurdle and determined how much I need to move the K rotors out to match the plane of the F's, but now I face a diameter dilemma.The K rotors are 295mm in dia., while the F ones are 275mm. I am trying to decide between fabricating a relocation bracket for the calipers, or trimming the rotors down. If I cut the rotors down, would a lathe be the best? or a mill? All I know about the metal of the rotors is that it is stainless steel, I do not know the grade. Thickness is 6mm.
Thanks for any info!
Chris






RE: Best Method of machining a Brake rotor to a smaller diameter?
If I were doing this, I would use a lathe. At 6mm thickness, you may want to have some sort of backup plate to stiffen it up a little bit, depending on how you chuck it up. Be sure to check runout in both directions, otherwise you won't be happy with the result.
Happy Turning,
Fegenbush
RE: Best Method of machining a Brake rotor to a smaller diameter?
It is better to have enough ideas for some of them to be wrong, than to be always right by having no ideas at all.