HobbyKing.com New Products Flash Sale
Closed Thread
Thread Tools
Old Nov 19, 2012, 11:19 AM
Fret for your pilot...
outkast1779's Avatar
Phoenix
Joined Apr 2006
377 Posts
Help!
need help...Motor shaft bent.

Hey Guys. I've got a great motor from Little Screamers of whom is out of business. Its for a 120 ducted fan unit. The problem is I've bent the shaft and can't find another one. 8mm x 135mm. Does anyone know of a professional company that can heat and bend this sucker straight??
outkast1779 is offline Find More Posts by outkast1779
Last edited by outkast1779; Dec 09, 2012 at 11:31 PM. Reason: Got it taken care of
Sign up now
to remove ads between posts
Old Nov 19, 2012, 12:14 PM
DX5e fatal flaw- PM me!!!!
United States, NY, Cortland
Joined Sep 2010
2,839 Posts
You can buy bulk lengths of 8mm shaft, cut to length and file any flats it might need.

Any machine shop that handles small stuff can straighten a shaft with a dial gauge, a pair of V-blocks, and a small press 9or a dang hammer), tough part is finding someone who will do it for less than a new shaft.
CNY_Dave is offline Find More Posts by CNY_Dave
Old Nov 19, 2012, 12:31 PM
Wake up, feel pulse, be happy!
C₄H₁₀'s Avatar
United States, AK, Fairbanks
Joined Aug 2009
12,407 Posts
Buy an 8mm drill blank and add flats/grooves as needed. Don't bother with trying to get it straightened; you can have several new shafts for the price of one straightened one.
C₄H₁₀ is offline Find More Posts by C₄H₁₀
Old Nov 19, 2012, 12:58 PM
Fret for your pilot...
outkast1779's Avatar
Phoenix
Joined Apr 2006
377 Posts
Thanks guys. I'll look to purchase a blank but I don't have access to the tools to cut or groove it. Any ideas on a company that does this kind of work?
outkast1779 is offline Find More Posts by outkast1779
Old Nov 19, 2012, 01:36 PM
Innov8tive's Avatar
Joined Jan 2007
1,730 Posts
I actually have a couple of those motors here at my office that have burnt windings, but the shaft is in perfect shape. Pop me a PM and we can get something for you.
Innov8tive is online now Find More Posts by Innov8tive
Site Sponsor
Old Nov 19, 2012, 01:46 PM
Fret for your pilot...
outkast1779's Avatar
Phoenix
Joined Apr 2006
377 Posts
Quote:
Originally Posted by Innov8tive View Post
I actually have a couple of those motors here at my office that have burnt windings, but the shaft is in perfect shape. Pop me a PM and we can get something for you.
Excellent!
outkast1779 is offline Find More Posts by outkast1779
Old Nov 19, 2012, 10:50 PM
Registered User
Dr Kiwi's Avatar
Chattanooga, Tennessee, United States
Joined May 2003
27,199 Posts
For the long term, consider one of these (or similar) as an invaluable asset: http://www.amazon.com/Dremel-8000-03.../dp/B0000DEZL9
Dr Kiwi is offline Find More Posts by Dr Kiwi
Old Nov 19, 2012, 10:53 PM
Fret for your pilot...
outkast1779's Avatar
Phoenix
Joined Apr 2006
377 Posts
Quote:
Originally Posted by Dr Kiwi View Post
For the long term, consider one of these (or similar) as an invaluable asset: http://www.amazon.com/Dremel-8000-03.../dp/B0000DEZL9
Yeah, I have one of those. But I need absolute precision. Machine shop precision.
outkast1779 is offline Find More Posts by outkast1779
Old Nov 20, 2012, 01:15 AM
Wake up, feel pulse, be happy!
C₄H₁₀'s Avatar
United States, AK, Fairbanks
Joined Aug 2009
12,407 Posts
Quote:
Yeah, I have one of those. But I need absolute precision. Machine shop precision.
A Dremel is plenty precise for cutting flats and grooves in shafts. Even a very sloppy job is much finer than you'll ever notice.
C₄H₁₀ is offline Find More Posts by C₄H₁₀
Old Nov 20, 2012, 11:14 AM
DX5e fatal flaw- PM me!!!!
United States, NY, Cortland
Joined Sep 2010
2,839 Posts
I would feel sketchy about cutting a ring groove with a dremel (folks with steadier hands than me do it though), but a flat does not need much precision at all.
CNY_Dave is offline Find More Posts by CNY_Dave
Old Nov 20, 2012, 12:36 PM
Innov8tive's Avatar
Joined Jan 2007
1,730 Posts
It is pretty easy to cut a ring groove if you do it right. The trick is to put the shaft in an electric drill and have a friend hold it down firmly on a table while the drill spins. I usually mark the shaft with a black permanent market around the area where I intend on making the groove, then use a set of digital calipers locked to the right length to scratch a slight mark through the black marker to show me where to cut. Then you take the Dremel tool with a thin cut-off wheel and run the Dremel very fast. 8 or 9 out of 10 if you have an adjustable model. Then you hold the Dremel with both hands and hold the wheel up against the shaft and cut a groove in the shaft. If you hold he cut-off wheel perfectly perpendicular to the shaft, you get a perfect c-clip groove with nice square sides.

Lucien
Innov8tive is online now Find More Posts by Innov8tive
Site Sponsor
Closed Thread


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion How to fix a bent motor shaft? RockChalkJayhawk Electric Plane Talk 11 Aug 25, 2012 02:09 PM
Discussion bent motor shaft 4mm Rhondas Electric Motor Design and Construction 9 Jul 31, 2012 01:17 PM
Discussion HELP! Bent motor shaft VROOMSTER Electric Plane Talk 17 Jan 13, 2010 02:22 AM
Discussion PLEASE HELP.. Bent motor shaft for Stryker bsampson Flying Wings 8 Jun 20, 2008 03:56 PM
Discussion Bent motor shaft...help Ebolavoodoo Power Systems 3 Apr 29, 2007 02:04 AM