X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imo-d04.mx.aol.com ([205.188.157.36] verified) by logan.com (CommuniGate Pro SMTP 5.2.10) with ESMTP id 3306420 for flyrotary@lancaironline.net; Tue, 18 Nov 2008 16:32:01 -0500 Received: from WRJJRS@aol.com by imo-d04.mx.aol.com (mail_out_v39.1.) id q.d0c.408f7c61 (37540) for ; Tue, 18 Nov 2008 16:31:53 -0500 (EST) Received: from smtprly-da03.mx.aol.com (smtprly-da03.mx.aol.com [205.188.249.146]) by cia-mb02.mx.aol.com (v121_r4.6) with ESMTP id MAILCIAMB021-5bbb4923344024; Tue, 18 Nov 2008 16:31:53 -0500 Received: from webmail-dd01 (webmail-dd01.webmail.aol.com [205.188.104.1]) by smtprly-da03.mx.aol.com (v121_r4.6) with ESMTP id MAILSMTPRLYDA032-5bbb4923344024; Tue, 18 Nov 2008 16:31:44 -0500 References: To: flyrotary@lancaironline.net Subject: Re: [FlyRotary] bolt depth Date: Tue, 18 Nov 2008 16:31:44 -0500 X-AOL-IP: 66.253.96.220 In-Reply-To: X-MB-Message-Source: WebUI MIME-Version: 1.0 From: wrjjrs@aol.com X-MB-Message-Type: User Content-Type: multipart/alternative; boundary="--------MB_8CB17DC30158FD8_BA4_24BE_webmail-dd01.sysops.aol.com" X-Mailer: AOL Webmail 39997-STANDARD Received: from 66.253.96.220 by webmail-dd01.sysops.aol.com (205.188.104.1) with HTTP (WebMailUI); Tue, 18 Nov 2008 16:31:44 -0500 Message-Id: <8CB17DC30132D7C-BA4-1213@webmail-dd01.sysops.aol.com> X-Spam-Flag:NO ----------MB_8CB17DC30158FD8_BA4_24BE_webmail-dd01.sysops.aol.com Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii" Kevin, Depending on the thread and bolt size the accepted depth is 1-1/2 to 2 bolt diameters. If it is going on your plane an application of locktite or safety wire is also in order. Bill Jepson -----Original Message----- From: kevin lane To: Rotary motors in aircraft Sent: Tue, 18 Nov 2008 12:40 pm Subject: [FlyRotary] bolt depth I am bolting homemade parts to my block and wanted to know any rule of thumb for how deep a bolt has to be.? does an 8mm bolt need 8mm of thread depth??? a certain number of threads?? are socket head bolts as strong as hex, at least for the intake/exhaust manifolds??? when do I use lock washers??? I always wondered why Lycoming engine case?halves never had lockwashers and used std (not fine)threads.(at least mine came that way)??? kevin?? n3773@comcast.net ----------MB_8CB17DC30158FD8_BA4_24BE_webmail-dd01.sysops.aol.com Content-Transfer-Encoding: 7bit Content-Type: text/html; charset="us-ascii" Kevin,
Depending on the thread and bolt size the accepted depth is 1-1/2 to 2 bolt diameters. If it is going on your plane an application of locktite or safety wire is also in order.
Bill Jepson


-----Original Message-----
From: kevin lane <n3773@comcast.net>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Tue, 18 Nov 2008 12:40 pm
Subject: [FlyRotary] bolt depth

I am bolting homemade parts to my block and wanted to know any rule of thumb for how deep a bolt has to be.  does an 8mm bolt need 8mm of thread depth?   a certain number of threads?  are socket head bolts as strong as hex, at least for the intake/exhaust manifolds?   when do I use lock washers?   I always wondered why Lycoming engine case halves never had lockwashers and used std (not fine)threads.(at least mine came that way)    kevin   n3773@comcast.net
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