Thread: Flywheel machining

Hi All,

Looks like I'm off to the company that does Surface Grinding in the morning,

Thank you all for your input

Cheers Jeff

Originally Posted by outback jeff

Thanks Mick, when i said mill thats what i meant (Surface Ground)



Pommy mechanic mate at work has told me that they only ever did them on a Lathe back in the UK.
Cheers Jeff

They possibly didn't have a grinder available. There are many different ways to do things if you have to.

Cheers, Mick.

Any competent fitter-machinist should achieve a near mirror finish with a lathe.

Hi
Could use a tool post grinder on a decent lathe and get excellent results inthe right hands if surface grinder not available.
With a standard cutter in a lathe it would chatter if some points on flywheel had hardened in use.

Regards
James

Originally Posted by zwitter

Hi
Could use a tool post grinder on a decent lathe and get excellent results inthe right hands if surface grinder not available.
With a standard cutter in a lathe it would chatter if some points on flywheel had hardened in use.

Regards
James

If the flywheel is cast iron, there will be a work-hardened skin on the surface. Chatter occurs if you are not taking a deep enough cut, that is, you are trying to cut in the work hardened zone, not in the soft iron underneath. Or if the setup is not sufficiently rigid.

I have noticed motor mechanical types, not machinists, using brake and flywheel lathes who seem afraid to take a deep cut. They think this will extend the component life and/or the life of the tungsten carbide inserts. False economy. The inserts will damage more easily if trying to cut the hard skin and not the soft cheese underneath.

Question. Is it really neccessary??? Replaced my clutch about 8yrs ago and about 180k. didn't machine the flywheel. Also don't machine discs when changing pads. Have never had problems? Is it a myth that it is required?

cheers

Originally Posted by luke68

Question. Is it really neccessary??? Replaced my clutch about 8yrs ago and about 180k. didn't machine the flywheel. Also don't machine discs when changing pads. Have never had problems? Is it a myth that it is required?

cheers

Hi Luke, I was told by the place where I bought the new clutch from that if the flywheel wasn't machined then it would not be covered by warranty if anything went wrong.

Cheers Jeff

Hi All,

I took the flywheel to my local engine re-builders/machine shop yesterday where it is being surface ground, cost me a grand total of $80.
Thanks to all for your tips/advice.

Cheers Jeff