All MetalShaping

Go Back   All MetalShaping > General Metal Shaping Discussion > Basic questions and answers
  Today's Posts Posts for Last 7 Days Posts for Last 14 Days  

Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 11-10-2020, 12:37 PM
Steve Hackel Steve Hackel is offline
Member
 
Join Date: Sep 2011
Location: Midlothian Ill
Posts: 67
Default Lubricating a shrinking disc

Honestly, must be getting old and can't remember... Working on the fenders for my model A' and it's been years since I pulled out the shrinking disc for the multitude of dents on these fenders. What have you used as a lubricant for the disc, and I'm getting an excessive amount of Galling and marks from the disc.
I currently have one of Wray Schelin's flat discs, and several of the ribbed designs from Scott Knight , so I just need a bit of direction to get my head back on straight. Thanks, Steve
__________________
Steve Hackel
Reply With Quote
  #2  
Old 11-10-2020, 03:33 PM
latoracing latoracing is offline
Member
 
Join Date: Dec 2013
Location: North Carolina
Posts: 33
Default

I have been using soapy water with decent results. There is minor galling and I keep the disc clean.
__________________
Mike

I have never made anything, I just modify the things around me into useful items with abilities that were GIVEN to me.
Reply With Quote
  #3  
Old 11-10-2020, 04:39 PM
John Buchtenkirch John Buchtenkirch is offline
MetalShaper of the Month October 2012
 
Join Date: Jul 2009
Location: Glen Cove, Long Island
Posts: 1,675
Default

Bar soap, Ivory to be exact. ~ John Buchtenkirch
__________________
John
Reply With Quote
  #4  
Old 11-10-2020, 05:58 PM
Chris_Hamilton Chris_Hamilton is offline
Member
 
Join Date: Jan 2013
Location: Southisde Virginia
Posts: 329
Default

Beeswax also works well.
__________________
Chris (trying to be the best me I can be)
Reply With Quote
  #5  
Old 11-11-2020, 01:21 AM
Brzeczyszczykiewicz Brzeczyszczykiewicz is offline
Member
 
Join Date: Sep 2017
Location: Poland
Posts: 174
Default

Greasy soap with tallow. Such as is used for spinning.
__________________
In the morning I was convinced that this was the only solution.

Witold
https://photos.app.goo.gl/VTz6ETWQhnKyqUQYA
https://www.youtube.com/watch?v=hzcKlFjOAoE
http://forum.poziome.pl/index.php?topic=1989.0
Reply With Quote
  #6  
Old 11-11-2020, 02:04 PM
dwmh dwmh is offline
MetalShaper of the Month May 2018, July 2022
 
Join Date: Aug 2015
Location: Nr Oxford UK
Posts: 659
Default

I seem to remember that Wray covers the area with a broad magic marker which acts as lubricant.
__________________
David Hamer
Reply With Quote
  #7  
Old 11-14-2020, 08:00 PM
Rick Mullin Rick Mullin is offline
Member
 
Join Date: Mar 2012
Location: Malvern,PA
Posts: 157
Default

I use a bar of Ivory soap also. A single swipe in the area is all you need. Perhaps more important is the need to keep the disk clean and a light polish with 320. I put some 320 on my 3 inch angle grinder and buff the surface of the disc. I have both flat and rippled discs and this works on both styles. I prefer the Sunchaser disc on aluminum and steel. If the surface of a steel panel gets burnished, I lightly buff the surface with 220. A burnished surface will be very difficult to continue shrinking with a disc.
__________________
Rick
Reply With Quote
  #8  
Old 11-19-2020, 01:52 PM
crystallographic crystallographic is offline
MetalShaper of the Month October '14 , April '16, July 2020, Jan 2023
 
Join Date: Dec 2010
Location: Western Sierra Nevadas, Badger Hill, CA
Posts: 4,388
Default

Quote:
Originally Posted by Rick Mullin View Post
I use a bar of Ivory soap also. A single swipe in the area is all you need. Perhaps more important is the need to keep the disk clean and a light polish with 320. I put some 320 on my 3 inch angle grinder and buff the surface of the disc. I have both flat and rippled discs and this works on both styles. I prefer the Sunchaser disc on aluminum and steel. If the surface of a steel panel gets burnished, I lightly buff the surface with 220. A burnished surface will be very difficult to continue shrinking with a disc.

Ivory soap flakes - also used in pressing/drawing operations, and mixed with another oil.

Old school. Good school.
__________________
Kent

http://www.tinmantech.com

"All it takes is a little practical experience to blow the he!! out of a perfectly good theory." --- Lloyd Rosenquist, charter member AWS, 1919.
Reply With Quote
  #9  
Old 11-20-2020, 12:40 AM
Steve Hackel Steve Hackel is offline
Member
 
Join Date: Sep 2011
Location: Midlothian Ill
Posts: 67
Default

An up date on my request for information..... Thanks !

I tried band saw blade lubricant (tallow ?) , grease, Ivory soap,
and straight paraffin wax used for treating hands and sometimes making expensive scented candles - and the winner is - PARAFFIN WAX !!!!!
The paraffin actually reduced the noise considerably, there was visibly less scratches and galling , and overall it was cleaner to use.

My only concern is that it does take more effort / pressure on the disc in order to create enough heat to cause the shrinking to take place.
__________________
Steve Hackel
Reply With Quote
  #10  
Old 11-20-2020, 01:56 PM
Rick Mullin Rick Mullin is offline
Member
 
Join Date: Mar 2012
Location: Malvern,PA
Posts: 157
Default

Paraffin was one of the things that I tried early on. It was too much lubricant. The key to success is all about a polished disc. As soon as there is any deposit on the disc, it will worsen exponentially and transmit to the surface you are shrinking. If polished (320 grit) it only takes a small strike of Ivory.
__________________
Rick
Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 On

Forum Jump

All times are GMT -5. The time now is 03:07 PM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.