What method will you be using to hold the couplings onto the shafts and have you any possibility of balancing after assembly?
regards Mark Rand RTFM
What method will you be using to hold the couplings onto the shafts and have you any possibility of balancing after assembly?
regards Mark Rand RTFM
Mark,
Couplings are retained on the shaft with 2 or 4 (depending on power level) m4 socket cap screws.
Regards, Paul
Hi Paul,
please forgive my ignorance of probably accepted machining principles. my friend is the machinist, but I am looking for ideas etc that will lighten his load It seems I am trying to do a Similar thing to yourself but at lower Speeds 10,000 to 20,000 rpm with 10 cm diameter x 1.2cm discs initially made from nylon ( to check feasibility) then machined aluminium. I am still at the ideas phase. though will prob start work In next week or so.looking to push fit discs to a couple of old graupner turbo 820s with max rpm 24000.or poss use a prop adapter.
I am very interested in how your project turned out,
how you balanced your discs/was this necessary? (i assume so with 50k rpm) what's the diameter of your discs
I am especially interested in how you fixed the discs to the shaft/geometry of your discs/were they solid discs etc
you mention socket cap screws are these better than grub screws
or any experience that you have had with your project
this is what I am trying to build ( initially 2 Contra rotating discs)
AndyL
friend
I followed the advice given in this thread: ream at low rpm, feed in the reamer and when it bottoms out, switch off the machine and then withdraw the reamer. This now gives perfectly acceptable results on most motors, except for those with shafts which are very undersized - many thanks everyone!
I also found that a new, sharp reamer seems to ream a smaller hole than an older, not-so-sharp reamer. You can order any size reamer you want, I found this very useful site:
Socket set screws are just grub screws that you tighten with a hex driver instead of a screwdriver - same thing, different driver.
Paul
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