X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imo-d05.mx.aol.com ([205.188.157.37] verified) by logan.com (CommuniGate Pro SMTP 5.0c2) with ESMTP id 719685 for flyrotary@lancaironline.net; Mon, 12 Sep 2005 17:52:31 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.188.157.37; envelope-from=WRJJRS@aol.com Received: from WRJJRS@aol.com by imo-d05.mx.aol.com (mail_out_v38_r5.3.) id q.1c9.30c2bbc5 (16100) for ; Mon, 12 Sep 2005 17:51:44 -0400 (EDT) Received: from MBLK-M09 (mblk-m09.mblk.aol.com [64.12.136.42]) by air-id11.mx.aol.com (v107.10) with ESMTP id MAILINID114-3ee44325f86f3d2; Mon, 12 Sep 2005 17:51:43 -0400 Date: Mon, 12 Sep 2005 17:51:43 -0400 Message-Id: <8C785FB4CAAFA26-1668-FDA@MBLK-M09.sysops.aol.com> From: wrjjrs@aol.com References: Received: from 66.127.99.234 by MBLK-M09.sysops.aol.com (64.12.136.42) with HTTP (WebMailUI); Mon, 12 Sep 2005 17:51:43 -0400 X-MB-Message-Source: WebUI X-MB-Message-Type: User In-Reply-To: X-Mailer: AOL WebMail 1.1.0.13964 Subject: Re: [FlyRotary] Re: FWF Bolts---General Advice Content-Type: multipart/alternative; boundary="--------MailBlocks_8C785FB4CAAFA26_1668_F8E_MBLK-M09.sysops.aol.com" MIME-Version: 1.0 To: flyrotary@lancaironline.net X-AOL-IP: 64.12.136.42 X-Spam-Flag: NO ----------MailBlocks_8C785FB4CAAFA26_1668_F8E_MBLK-M09.sysops.aol.com Content-Type: text/plain; charset="us-ascii" Al virtually everything is cold headed now. (forged) Even the cheap stuff. Socket head bolts are cold headed and then case hardened. The same grade should be the same spec, but I would buy from someone I know. Check ARP's website. Bill Jepson -----Original Message----- From: Al Gietzen To: Rotary motors in aircraft Sent: Mon, 12 Sep 2005 12:15:33 -0700 Subject: [FlyRotary] Re: FWF Bolts---General Advice 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 ----------MailBlocks_8C785FB4CAAFA26_1668_F8E_MBLK-M09.sysops.aol.com Content-Type: text/html; charset="us-ascii"
Al virtually everything is cold headed now. (forged) Even the cheap stuff. Socket head bolts are cold headed and then case hardened. The same grade should be the same spec, but I would buy from someone I know. Check ARP's website.
Bill Jepson  
 
-----Original Message-----
From: Al Gietzen <ALVentures@cox.net>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Mon, 12 Sep 2005 12:15:33 -0700
Subject: [FlyRotary] Re: FWF Bolts---General Advice

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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