Return-Path: Received: from out005.verizon.net ([206.46.170.143] verified) by logan.com (CommuniGate Pro SMTP 4.1.8) with ESMTP id 3043403 for flyrotary@lancaironline.net; Tue, 24 Feb 2004 11:18:46 -0500 Received: from [65.239.43.96] ([67.227.200.31]) by out005.verizon.net (InterMail vM.5.01.06.06 201-253-122-130-106-20030910) with ESMTP id <20040224161844.SJVQ2677.out005.verizon.net@[65.239.43.96]> for ; Tue, 24 Feb 2004 10:18:44 -0600 Mime-Version: 1.0 X-Sender: res0c5l1@incoming.verizon.net Message-Id: In-Reply-To: References: Date: Tue, 24 Feb 2004 08:20:51 -0800 To: "Rotary motors in aircraft" From: Ken Welter Subject: [FlyRotary] Re: die grinders Content-Type: multipart/alternative; boundary="============_-1134482827==_ma============" X-Authentication-Info: Submitted using SMTP AUTH at out005.verizon.net from [67.227.200.31] at Tue, 24 Feb 2004 10:18:42 -0600 --============_-1134482827==_ma============ Content-Type: text/plain; charset="us-ascii" ; format="flowed" I use a 3/8 inch ball end mill, it is very controllable and wont gouge big chunks out. Ken >You didn't say what size cutter you're using, but Machinery's >handbook says that drilling 1010 carbon >steel requires a drilling speed of ~90 ft./min. By >comparison 60nn aluminum requires 350 ft./min. > >If your burr had a diameter of 1", it would be cutting >3.14" per revolution. The smaller the cutter, the >more RPM you'll need for the optimal speed. > >Dale R. --============_-1134482827==_ma============ Content-Type: text/html; charset="us-ascii" [FlyRotary] Re: die grinders
  I use a 3/8 inch ball end mill, it is very controllable and wont gouge big chunks out. 
 
 Ken


You didn't say what size cutter you're using, but Machinery's handbook says that drilling 1010 carbon
steel requires a drilling speed of ~90 ft./min.  By
comparison 60nn aluminum requires 350 ft./min.

If your burr had a diameter of 1", it would be cutting
3.14" per revolution.  The smaller the cutter, the
more RPM you'll need for the optimal speed.
Dale R.

--============_-1134482827==_ma============--