X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sat, 18 Feb 2006 20:40:25 -0500 Message-ID: X-Original-Return-Path: Received: from wind.imbris.com ([216.18.130.7] verified) by logan.com (CommuniGate Pro SMTP 5.0.8) with ESMTPS id 990112 for lml@lancaironline.net; Sat, 18 Feb 2006 10:46:38 -0500 Received-SPF: none receiver=logan.com; client-ip=216.18.130.7; envelope-from=brent@regandesigns.com Received: from [192.168.1.100] (wireless-216-18-135-19.imbris.com [216.18.135.19]) (authenticated bits=0) by wind.imbris.com (8.12.11/8.12.11.S) with ESMTP id k1IFjp0W060397 for ; Sat, 18 Feb 2006 07:45:51 -0800 (PST) (envelope-from brent@regandesigns.com) X-Original-Message-ID: <43F7412B.7010002@regandesigns.com> X-Original-Date: Sat, 18 Feb 2006 07:45:47 -0800 From: Brent Regan User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.2) Gecko/20040804 Netscape/7.2 (ax) X-Accept-Language: en-us, en MIME-Version: 1.0 X-Original-To: Lancair Mailing List Subject: Re: LSE timing sensor change, Mag Gear from E-Mag problem Content-Type: multipart/alternative; boundary="------------040802050203080203040502" This is a multi-part message in MIME format. --------------040802050203080203040502 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Scott, Nasty gear! From the pictures it looks like you got a rough cut gear without the finish grind. Too much metal. You can compare the profile of the bad gear to a good gear by using three pins (similar to thread gauging) and a micrometer. The bad news is that I don't think your investigation is over. How does the mating gear look? Is it worn as well? Was the bad gear hardened? At a minimum you should inspect the replacement gear at 25, 50 and 100 hours. If you send me the bad gear and a good gear I can compare their profiles and hardness in our metrology lab. Until you are sure of the cause of the problem you don't know if the pin is still in the hand grenade. Regards Brent --------------040802050203080203040502 Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: 7bit Scott,
Nasty gear! From the pictures it looks like you got a rough cut gear without the finish grind. Too much metal. You can compare the profile of the bad gear to a good gear by using three pins (similar to thread gauging) and a micrometer.

The bad news is that I don't think your investigation is over. How does the mating gear look? Is it worn as well? Was the bad gear hardened? At a minimum you should inspect the replacement gear at 25, 50 and 100 hours.

If you send me the bad gear and a good gear I can compare their profiles and hardness in our metrology lab.

Until you are sure of the cause of the problem you don't know if the pin is still in the hand grenade.

Regards
Brent
--------------040802050203080203040502--