X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from a34-mta02.direcway.com ([66.82.4.91] verified) by logan.com (CommuniGate Pro SMTP 4.3.5) with ESMTP id 1027251 for flyrotary@lancaironline.net; Thu, 30 Jun 2005 12:39:50 -0400 Received-SPF: none receiver=logan.com; client-ip=66.82.4.91; envelope-from=jackbeale@direcpc.com Received: from jack (dpc691916001.direcpc.com [69.19.16.1]) by a34-mta02.direcway.com (iPlanet Messaging Server 5.2 HotFix 1.25 (built Mar 3 2004)) with SMTP id <0IIW00A77OWUS3@a34-mta02.direcway.com> for flyrotary@lancaironline.net; Thu, 30 Jun 2005 12:39:05 -0400 (EDT) Date: Thu, 30 Jun 2005 12:38:29 -0400 From: Jack Beale Subject: Re: [FlyRotary] Re: Machining help needed To: Rotary motors in aircraft Message-id: <006801c57d92$384bdc00$2619050a@jack> MIME-version: 1.0 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 X-Mailer: Microsoft Outlook Express 6.00.2600.0000 Content-type: multipart/alternative; boundary="Boundary_(ID_gNBB6mcx6zVL4cP6ihQBDg)" X-Priority: 3 X-MSMail-priority: Normal References: This is a multi-part message in MIME format. --Boundary_(ID_gNBB6mcx6zVL4cP6ihQBDg) Content-type: text/plain; charset=iso-8859-1 Content-transfer-encoding: 7BIT Jerry, Your local machine tool provider will have "adjustable reamers". You can get one near the size you need and adjust it precisely with an Allen key. You'll need a 0-1" micrometer or vernier to measure the reamer after the adjustment. I used to use an adjustable boring bar to make holes to +- a couple "tenths"... (.0002). It can be done. You have to be patient and "sneak up on it"... Jack -------------------------------------------------------------------------------- ----- Original Message ----- From: Dale Rogers To: Rotary motors in aircraft Sent: Thursday, June 30, 2005 11:02 AM Subject: [FlyRotary] Re: Machining help needed George, I have to disagree with your observation. The boring tool, by itself will not yield a surface appropriate for seating the injector o-ring (and easy removal for service). It will have to be followed by honing or reaming. And most (inexpensive) boring tools are difficult to adjust to +/- 0.001. Jerry's best (& least expensive) bet is to have a standard size reamer ground down to his target size. Regards, Dale R. > From: "George Lendich" > Date: 2005/06/30 Thu AM 02:47:09 EDT > To: "Rotary motors in aircraft" > Subject: [FlyRotary] Re: Machining help needed > > Jerry, > The boring tool should be very accurate - provided your using a mill and > holding the job very securely. > George ( down under) > > > I need to find someone to finish the bores on my injector bosses or > > tell me how to do it. Final i.d.should be .540 to .545 in. The > > bosses are .45 in high and are bored and reamed to .5312. Material is > > 6061. I tried using a boring bar but could not maintain the > > tolerances. I bought adjustable hand reamers but they were not the > > right tool for the job. I considered trying to sand the bore to the > > correct size using a flapper but have not tried it yet. Suggestions? > > Volunteers? Jerry --Boundary_(ID_gNBB6mcx6zVL4cP6ihQBDg) Content-type: text/html; charset=iso-8859-1 Content-transfer-encoding: 7BIT
Jerry,
 
    Your local machine tool provider will have "adjustable reamers".  You can get one near the size you need and adjust it precisely with an Allen key.  You'll need a 0-1" micrometer or vernier to measure the reamer after the adjustment.
 
    I used to use an adjustable boring bar to make holes to +- a couple "tenths"...  (.0002).  It can be done.  You have to be patient and "sneak up on it"...

Jack
 
 

 
----- Original Message -----
Sent: Thursday, June 30, 2005 11:02 AM
Subject: [FlyRotary] Re: Machining help needed

George,

   I have to disagree with your observation.  The boring
tool, by itself will not yield a surface appropriate for
seating the injector o-ring (and easy removal for service). 
It will have to be followed by honing or reaming.  And most
(inexpensive) boring tools are difficult to adjust to +/-
0.001. 

   Jerry's best (& least expensive) bet is to have a standard
size reamer ground down to his target size.

Regards,
Dale R.

> From: "George Lendich" <lendich@optusnet.com.au>
> Date: 2005/06/30 Thu AM 02:47:09 EDT
> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> Subject: [FlyRotary] Re: Machining help needed
>
> Jerry,
> The boring tool should be very accurate - provided your using a mill and
> holding the job very securely.
> George ( down under)
>
> > I need to find someone to finish the bores on my injector bosses or
> > tell me how to do it.   Final i.d.should be .540 to .545 in.    The
> > bosses are .45 in high and are bored and reamed to .5312.  Material is
> > 6061.   I tried using a boring bar but could not maintain the
> > tolerances.  I bought adjustable hand reamers but they were not the
> > right tool for the job.  I considered trying to sand the bore to the
> > correct size using a flapper but have not tried it  yet.  Suggestions?
> > Volunteers?     Jerry
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