Received-SPF: pass
 receiver=logan.com; client-ip=208.104.2.25; envelope-from=jewen@comporium.net
From: <jewen@comporium.net>
Subject: Re: [FlyRotary] PSRU oil drain
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Message-Id: <20080629230954.BUY50634@ms2.comporium.net>
Date: Sun, 29 Jun 2008 23:09:54 -0400 (EDT)

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.

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