Antique Engines and Old Iron
[Home] - [HELP] - [Forums] - [Groups] - [Classified Ads] - [Subscribe] - [Books] - [Sponsors] -

Go Back   SmokStak > SmokStak® Shop Equipment Tools and Techniques > Machine Shop and Tool Talk
Forgot Password? Join Us!

Notices

Machine Shop and Tool Talk Shop Equipment, fabrication, repairs, how to fix it, which tool to use for the job. Machinist shop talk, straight to the point.

Machine Shop and Tool Talk

Best way to make a tortional spring?


this thread has 9 replies and has been viewed 2188 times

Reply
 
Thread Tools Display Modes
  #1  
Old 10-31-2010, 08:09:45 AM
Ram Ram is offline
Registered
 
Join Date: Mar 2005
Location: Virginia Beach, Virginia USA
Posts: 33
Thanks: 4
Thanked 8 Times in 5 Posts
Default Best way to make a tortional spring?

Have an old Wagner repulsion induction motor with springs holding brushes in the brush assembly. One spring is broken in half.

This thing is so old, no NOS can be found and it is not cost effective to have half a dozen springs custom made from a company much less one.

I would like to try making a spring but wanted to ask for tips and suggestions first before ruining any spring wire first.
Reply With Quote
Sponsored Links
  #2  
Old 10-31-2010, 08:29:53 AM
JKWidener's Avatar
JKWidener JKWidener is offline
Registered
 
Join Date: Aug 2006
Location: Alexandria, Indiana USA
Posts: 3,522
Thanks: 1,477
Thanked 2,387 Times in 783 Posts
Default Re: Best way to make a tortional spring?

Go to a motor rebuild shop, im sure another brush spring for a different kind of motor could be used.
Reply With Quote
  #3  
Old 10-31-2010, 09:10:29 AM
Jim Tremble Jim Tremble is offline
Subscriber
 
Join Date: Nov 2004
Location: Washington
Posts: 1,923
Thanks: 4,838
Thanked 737 Times in 372 Posts
Default Re: Best way to make a tortional spring?

Quote:
Originally Posted by Ram View Post

I would like to try making a spring but wanted to ask for tips and suggestions first before ruining any spring wire first.

Try this site. Very helpful on making springs.

Jim


http://home.earthlink.net/~bazillion/glossary.html
Reply With Quote
The Following User Says Thank You to Jim Tremble For This Post:
  #4  
Old 10-31-2010, 03:47:07 PM
Ram Ram is offline
Registered
 
Join Date: Mar 2005
Location: Virginia Beach, Virginia USA
Posts: 33
Thanks: 4
Thanked 8 Times in 5 Posts
Default Re: Best way to make a tortional spring?

Jim, Thanks for the link very good info and safety tips. It sounds do-able. May have to build a small propane fired oven that won't be a big deal though.

JK I have checked so many shops it is not funny. All they can say is the spring is obsolete and they can't get one any more.

Love to find someone with an old Wagner R-I motor that the windings are shot for the springs and brush assy. I'm sure most have made it to the scrap yards by now though.
Reply With Quote
  #5  
Old 10-31-2010, 04:22:28 PM
OTTO-Sawyer's Avatar
OTTO-Sawyer OTTO-Sawyer is offline
Subscriber
 
Join Date: Nov 2008
Location: Scioto Mills, Illinois USA
Posts: 8,968
Thanks: 20,789
Thanked 7,891 Times in 3,753 Posts
Default Re: Best way to make a tortional spring?

Thanks for that link Jim.

No projects going on at the moment, but it could be very handy in the future.
Reply With Quote
  #6  
Old 10-31-2010, 05:22:30 PM
JoeCB JoeCB is offline
Subscriber
 
Join Date: Feb 2008
Location: Farmington Hills, Michigan
Posts: 610
Thanks: 103
Thanked 391 Times in 201 Posts
Default Re: Best way to make a tortional spring?

Ram, Have you considered bending a new spring out of piano wire? This wire is pre hardened/tempered and makes very good quality springs requiring no additional heat treat. Of course a lot depends on the comfiguration that you need.
A picture of the old spring would help.

Joe B
Reply With Quote
  #7  
Old 10-31-2010, 06:47:06 PM
Ram Ram is offline
Registered
 
Join Date: Mar 2005
Location: Virginia Beach, Virginia USA
Posts: 33
Thanks: 4
Thanked 8 Times in 5 Posts
Default Re: Best way to make a tortional spring?

Quote:
Originally Posted by Joe Brincat View Post
Ram, Have you considered bending a new spring out of piano wire?
Joe B
That is what I want to use. Assuming "Music wire" is the same as "Piano wire".

Pictures below.
Attached Thumbnails
Click image for larger version

Name:	BrokenSpring.jpg
Views:	98
Size:	41.2 KB
ID:	91391   Click image for larger version

Name:	GoodSpring.jpg
Views:	98
Size:	56.8 KB
ID:	91392  
Reply With Quote
  #8  
Old 10-31-2010, 06:47:38 PM
Jim Tremble Jim Tremble is offline
Subscriber
 
Join Date: Nov 2004
Location: Washington
Posts: 1,923
Thanks: 4,838
Thanked 737 Times in 372 Posts
Default Re: Best way to make a tortional spring?

Joe

All of the springs I have made required heating after completion. All were made of piano wire. It relaxes the stress of bending. 500* for 1 to 1-1/2 hours and let cool in the oven. I just use an old electric stove oven in the shop.

Also, the mandrel that you wind the spring on, has to be 1/3 smaller OR 2/3 the size of the desired ID of the spring that you are making. The new spring will unwind a bit when you are done. All of this is explained on the website.

Jim

Last edited by Jim Tremble; 11-01-2010 at 10:44:16 AM.
Reply With Quote
The Following User Says Thank You to Jim Tremble For This Post:
  #9  
Old 11-01-2010, 10:03:49 AM
JoeCB JoeCB is offline
Subscriber
 
Join Date: Feb 2008
Location: Farmington Hills, Michigan
Posts: 610
Thanks: 103
Thanked 391 Times in 201 Posts
Default Re: Best way to make a tortional spring?

Jim, I can understand the concept behind the 500 degree stress relief. that temp would not soften the wire as a normal carbon spring would have been tempered at a higher temp like around 750 or so.
However I question the need for any heat treatment after cold forming a piano wire spring. I have made many springs from wire as heavy as 1/8 " and never had a problem. Perhaps the 500* degree treatment would make a BETTER spring.
Joe B

As for the needed torsion spring... I would start with a proper size extension spring and uncoil to form the straight arms. Looks like this is a low stress application.. should work OK
Reply With Quote
The Following User Says Thank You to JoeCB For This Post:
  #10  
Old 11-14-2010, 09:14:57 PM
Monte Stock
Guest
 
Posts: n/a
Default Re: Best way to make a tortional spring?

I'm not trying to sound like a smart a$$ but have you tried a hardware store. The kind that has all the little bins. That looks like you could modify something that would work. Let us know what you do. I run into this problem from time to time and always interested in better ways.
Reply With Quote
Reply

Bookmarks


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

F o r u m Jump

Similar Threads Chosen at Random
Thread Thread Starter F o r u m Replies Last Post
What make is this one? BobM Hit & Miss Gas Engine Discussion 5 02-16-2008 12:06:47 PM
What make is this? Brian Manning Antique Steel Wheel Tractors - Old Iron Lugs and Cleats 8 08-30-2006 05:20:19 PM
did they make? Chuck R Machine Shop and Tool Talk 2 05-12-2006 08:07:15 PM
What make is this? Brian Manning Steam Stationary Engines, Traction Engines 7 02-14-2005 01:11:49 PM
What make??? Jim Sherman Hit & Miss Gas Engine Discussion 4 01-23-2005 11:32:46 PM


Use "Ctrl" mouse wheel to change screen size.
All times are GMT -4. The time now is 12:21:25 AM.

Smokstak and Enginads site search!


All use is subject to our TERMS OF SERVICE
SMOKSTAK® is a Registered Trade Mark - A Community of Antique Engine Enthusiasts
Copyright © 2000 - 2019 by Harry Matthews P.O. Box 5612 - Sarasota, FL 34277