X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao01.cox.net ([68.230.241.38] verified) by logan.com (CommuniGate Pro SMTP 5.0c2) with ESMTP id 719411 for flyrotary@lancaironline.net; Mon, 12 Sep 2005 15:16:08 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.38; envelope-from=ALVentures@cox.net Received: from BigAl ([68.7.14.39]) by fed1rmmtao01.cox.net (InterMail vM.6.01.05.02 201-2131-123-102-20050715) with ESMTP id <20050912191524.NNZA24420.fed1rmmtao01.cox.net@BigAl> for ; Mon, 12 Sep 2005 15:15:24 -0400 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] FWF Bolts---General Advice Date: Mon, 12 Sep 2005 12:15:33 -0700 Message-ID: <001101c5b7ce$5931a960$6400a8c0@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0012_01C5B793.ACD51B50" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 Importance: Normal In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_0012_01C5B793.ACD51B50 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Subject: [FlyRotary] FWF Bolts---General Advice =20 Is there is benefit to using the flange type bolt heads (stock mazda) instead of using a regular or socket head bolt with the proper washer. I = am ready to mount the redrive and need to purchase bolts for the flexplate. = The local mazda dealer has them in stock but would like to charge me $30 for = the set. Grade 12.9 socket head bolts are less than a $1 each with washer.=20 =20 Any opinions? =20 Bobby =20 Not that they wouldn't work, but grade 12 is going to be quite brittle, = so a lower grade would be better. I'm guessing that the flange head bolts = are forged, and the standard socket head may be machined. The forged head = is stronger because of grain orientation. Someone else may know; but when = I'm guessing I prefer to err on the conservative side and go with the = flanged. You may be able to find the same bolts that the Mazda dealer would sell = you somewhere else (McMaster-Carr?) for considerably less. =20 AL ------=_NextPart_000_0012_01C5B793.ACD51B50 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

Subject: [FlyRotary] FWF Bolts---General Advice

 

Is there is benefit to = using the flange type bolt heads (stock mazda) instead of using a regular or = socket head bolt with the proper washer. I am ready to mount the redrive and need to purchase bolts for the flexplate. The local mazda dealer has them in = stock but would like to charge me $30 for the set. Grade 12.9 socket head bolts = are less than a  $1 each with washer.

 

Any = opinions?

 

Bobby

 

Not that they wouldn’t work, but grade 12 is going to be quite = brittle, so a lower grade would be better.  I’m guessing that the flange = head bolts are forged, and the standard socket head may be machined. =  The forged head is stronger because of grain orientation.  Someone else = may know; but when I’m guessing I prefer to err on the conservative = side and go with the flanged.  You may be able to find the same bolts that = the Mazda dealer would sell you somewhere else (McMaster-Carr?) for = considerably less.

 

AL

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