Return-Path: Sender: (Marvin Kaye) To: flyrotary@lancaironline.net Date: Mon, 23 Feb 2004 20:12:18 -0500 Message-ID: X-Original-Return-Path: Received: from fed1mtao08.cox.net ([68.6.19.123] verified) by logan.com (CommuniGate Pro SMTP 4.1.8) with ESMTP id 3042520 for flyrotary@lancaironline.net; Mon, 23 Feb 2004 19:35:59 -0500 Received: from smtp.west.cox.net ([172.18.180.57]) by fed1mtao08.cox.net (InterMail vM.5.01.06.08 201-253-122-130-108-20031117) with SMTP id <20040224003558.ISTZ5081.fed1mtao08.cox.net@smtp.west.cox.net> for ; Mon, 23 Feb 2004 19:35:58 -0500 From: Dale Rogers X-Original-To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] die grinders X-Original-Date: Mon, 23 Feb 2004 19:35:59 -0500 MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="----=____1077582959024_f9LZjasda6" X-Original-Message-Id: <20040224003558.ISTZ5081.fed1mtao08.cox.net@smtp.west.cox.net> This is a multi-part message in MIME format. ------=____1077582959024_f9LZjasda6 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit 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. > > From: "kevin lane" > Date: 2004/02/23 Mon PM 05:31:12 EST > To: "Rotary motors in aircraft" > Subject: [FlyRotary] die grinders > > despite already building a -6a I still have problems with the die grinder. I have yet to figure out what makes it jump around and what makes it cut nicely. I am using the very open tooth die that won't clog up when cutting AL. what is the correct feed direction, speed, etc... I should be trying? > Kevin Lane Portland, OR > e-mail-> n3773@comcast.net > web-> http://home.comcast.net/~n3773 > (browse w/ internet explorer) > ------=____1077582959024_f9LZjasda6 Content-Type: text/html; name="reply" Content-Disposition: inline; filename="reply"

despite already building a -6a I still have problems with the die grinder. I have yet to figure out what makes it jump around and what makes it cut nicely. I am using the very open tooth die that won't clog up when cutting AL. what is the correct feed direction, speed, etc... I should be trying?

Kevin Lane Portland, OR
e-mail-> n3773@comcast.net
web-> http://home.comcast.net/~n3773
(browse w/ internet explorer)

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