Topic: Turning motorcycle rotors (non-drilled)

[754]

 Mark I am running a Chin Hung lathe, the next size up & bigger, are marketed as Kingston lathes.

 The tailstock method, I use constantly for short run 2nd op turning, or I drill/tap end of arbor and use bolt/washer to draw it up tight (not for 1 pce though) Does'nt everybody do that.??

 The toolholder I want to try is 1 inch plate (sorta triangular) that clamps in the 4 way.. it has a groove that the disc fits into & the ends have 2 slots for brazed tools. Held by setscrews. Adjusting them is the trick, but I think i have that solved.

 Turning, my lowest speed is 35, but it still picks up chatter, or wants to. I finally solved it thru necessity, I use my jog button, simply restart it before it comes to a stop, over and over and over.. takes a while..

 I did not space the caliper but you can do this by changing the rounded washer insert or shimming it.

 I am trying to find a way I can do this and provide the service at an affordable cost. I asked 2 guys I know about renting time on flywheel grinders, but they want to do it for me.. no money in that.. thay tend to charge thick, by the cut..

[Markcb750]

I sold and installed Kingston Lathes prior to Monarch, a good lathe, I have several on board USN ships through careful manipulation of the defense purchasing specifications.  

I always routed disk like parts to a chuck equipped lathe, a little longer to set up sometimes but I felt it gave us good parts.  We all go with what we are taught, self or other.


The speed problem is the key to cutting stainless, you might find an insert that would allow a lower chip load therefore reduced loading on the setup/tooling. Might allow you to run without jogging.  

Do you have a four jaw chuck you can clamp on the OD, you would need to nake some special tooling to locate from the mounting surface to reduce set up time in the long term, but for cutting development just an indicator to establish cutting plane as the jaws are tightened.

I have three spare rotors, I might visit my friend Nelson and see what I can do.  Bet he tells me to quit fn about and grind it on his old Blanchard.

[Mille44]

Wow! You guys sure know how to information overload a guy... 

... so I'm taking it that it cant be done on a regular automotive lathe....

[Markcb750]

Wow! You guys sure know how to information overload a guy... 

... so I'm taking it that it cant be done on a regular automotive lathe....

no.


But an engine lathe would work just fine. (If you have the right tooling. )

[754]

Mark, back in  86 I went lathe shopping, I knew I would have the money within a year.. I really liked the the MAZAK, but the dealer I liked had the Kingstons, and the smaller Chin Hung..

 In 87, I ended up with the HS 1700.. which is 16 " swing and 67 in between centres. It had a few features I really liked ..like the hardened cross slide and the ability to cut quite a wide variety if both metric & standard threads without changing  gears. It has served me well and is not a high hours machine,,

 Keep in mind though, if you can drill with HSS , you can probably turn it too.. I know its not always ideal, but I know I can grind a tool from a blank..

 The tool I built (not yet tried) , weighd 4 lbs, fits in the 4 way,  is 1.25 thick.. might work.....