Skim 390mm discs

[el_ringo]

I've only had good experiences with disk cutting (one side at a time), even with floating bells and up to 405mm. I have access to an old (from the 60's or 70's) lathe that used to belong to a school. Accuracy is within 0.002mm on the outer edge of the finished surface. So far I've worked on RS6 C5 365mm, RS6 C6 390mm, S6 C7 400mm, MTM RS6 C6 upgrade 405mm.

Where are you based buddy?

Shop, I tried a few of those places near me and the reply was a no. One said they can only do Vauxhalls and the other maxed out at 320mm. Ill try a few more places next week.

[Jultsu]

I've only had good experiences with disk cutting (one side at a time), even with floating bells and up to 405mm. I have access to an old (from the 60's or 70's) lathe that used to belong to a school. Accuracy is within 0.002mm on the outer edge of the finished surface. So far I've worked on RS6 C5 365mm, RS6 C6 390mm, S6 C7 400mm, MTM RS6 C6 upgrade 405mm.

Where are you based buddy?

Finland, sorry.

[spurtle]

My advice: if you're going to skim, then get it done on the car by Procut or whoever. I had my previous discs milled (off the car) by someone with a reputation for getting these things right. All the tolerances were spot on, tested both when mounted by the bell and the outside rim ... but the end result was terrible judder (with new pads etc).

Wasted a bunch of time sorting that out. New discs and all was solved.

[el_ringo]

Thank buddy,

I have managed to get someone locale who will do the on the car style one and will report back at the end of the week with the results.

R

[el_ringo]

Skimmed with a pro cut lathe.

[spurtle]

Looks pretty ... initial results? My rear discs could do with sprucing up so if your results are good I will follow suit...

[SuprSi]

Enjoy!

Spurtle, I did mine recently, it takes a few hundred miles to wear the disc smooth (ie wear off the lathe marks), the brakes felt good during this period, but after that and giving it a really good b road thrashing to bed the pads in they were silky smooth at any speed. I'd definitely recommend it, and its probably the cheapest thing I've had to do to the car!

[el_ringo]

Yeah, much better now it has been done.

[jangol]

Where did you get it done? Think I need mine doing..

[el_ringo]

http://andyturnermotorengineering.co.uk/

[bam_bam]

Why are all the good mechanics a billion miles from London?

[el_ringo]

https://www.youtube.com/watch?v=S1PMvyVdy-g