Hey thanks Ernest, you shouldn’t have to do that, but I won’t stop you …
I’ve ordered two long bits, 5/32” and 3/16” for inside diameter … the outside diameter you could double-check with any housing, but 3/8” is a pretty close tolerance fit.
Jeff Whaley
100 Manion Rd,
RR#2 Carp, Ontario, Canada
K0A 1L0
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From:
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Ernest Christley <echristley@att.net>
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Subject:
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Re: [FlyRotary] Re: Broken Tension Bolt ... update
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Date:
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Tue, 11 Jan 2011 13:07:28 -0500
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To:
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Rotary motors in aircraft <flyrotary@lancaironline.net>
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Ernest Christley wrote:
Jeff, send me a couple of measurements and I'll turn a collar that you can use as a guide to center the drill bit. The inside diameter would be the diameter of your bit. The outside would be
the size of the hole.
From: Jeff Whaley
Sent: Tuesday, January 11, 2011 12:52 PM
To: 'Rotary motors in aircraft'
Subject: RE: Broken Tension Bolt ... update
So far no luck at getting the broken tension bolt threaded end out of the front casting. With help from Cary Beazley, we were able to back out the broken part a little bit with just pressure and mating the two surfaces together, until
it jammed and would come no further. Not having (or knowing about) LH drill bits at the time, we decided to RH drill a pilot hole for an easy-out. Drilling the hole was no problem but getting it centered was, so it’s drilled off-center and the broken piece
is now probably bottomed out in the casting. The easy-out is simply not latching onto the bolt. We’re going to borrow a bore scope to get a better look. After that I’ll have to make a long center-punch and try to make a new (centered) pilot hole with the
long LH drill bits on-order (see link) … hopefully they’ll grab onto the part and extract it, otherwise it will be an engine tear-down, which I dread at any time but at -10C it’s no fun at all.
http://www.icscuttingtools.com/catalog/page_110.pdf
Jeff Whaley