flyrotary@lancaironline.net Mailing List Archive

Whose PSRU is this? Must not be Tracy's as it has an oil drain? Don't they normally do all the machining on those gear sets BEFORE they harden them to diamond?? Bill B -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Ernest Christley Sent: Tuesday, July 01, 2008 12:55 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: PSRU oil drain jewen@comporium.net wrote: > I would set it up in a mill and cut the hole with a solid carbide center cutting end mill. If you want to drill it, I would start small and step up in size, using cobalt steel bits with TiN or TiALN coating. I would not try to hand drill - either a very sturdy stable drill press or a vertical mill. > Well, the cobalt steel bits with the TiN coating doesn't work. Made the 5/32" bit nice and round. > Joe > > ---- Original message ---- > >> Date: Sun, 29 Jun 2008 22:05:41 -0400 >> From: Ernest Christley <echristley@nc.rr.com> >> Subject: [FlyRotary] PSRU oil drain >> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net> >> >> I've got to put an oil drain in my PSRU. I can put a 1/8" hole in, and >> have it route around the ring gear; but I don't think 1/8" is large >> enough. I started trying to put a 1/4" hole through the ring gear, but >> it seems to be harder than the bits I have. >> >> How does one put a hole in the hardened steel, or is 1/8" large enough. >> >> -- >> >> http://www.ronpaultimeline.com >> >> >> >> -- >> Homepage: http://www.flyrotary.com/ >> Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html >> > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html > > -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html