All MetalShaping

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

Reply
 
Thread Tools Search this Thread Display Modes
  #11  
Old 05-31-2019, 07:59 AM
foamcar foamcar is offline
Member
 
Join Date: Dec 2012
Location: NE Michigan
Posts: 165
Default

Maybe I could do the math, but what thickness hardwood board did you start with? Nice 140 in backgroud(had a 120 for 42 years).
Great project.
Thanks - Phil
__________________
Phil
Reply With Quote
  #12  
Old 05-31-2019, 08:46 AM
rkolenda rkolenda is offline
MetalShaper of the Month Nov. 2009
 
Join Date: May 2009
Location: Rockford,Michigan
Posts: 93
Default

"Maybe I could do the math, but what thickness hardwood board did you start with?"Sorry Phil,I forgot to include the thickness .The disc are cut from a piece of "1x6 " maple,but the actual measurements are .750 inch thick x 5.5 inch wide. Goofy American system for wood sizes.
__________________
Robert
Reply With Quote
  #13  
Old 05-31-2019, 07:32 PM
BTromblay BTromblay is offline
ADMINISTRATOR MetalShaper of the Month August 2018
 
Join Date: Oct 2015
Location: Mukwonago, Wi
Posts: 567
Default

My grinder is a fixed rpm. The maple block I used was thicker, about 1 1/2" so I'm able to use the stock nut.

B
__________________
Bill Tromblay

"A sign of a good machinist, is one who can fix his F$@& Ups" My mentor and friend, Gil Zietz Micro Metric Machine.
Reply With Quote
  #14  
Old 06-01-2019, 05:44 AM
Jerry Jackson Jerry Jackson is offline
Member
 
Join Date: May 2009
Location: San Antonio
Posts: 82
Default

I suggest taking steps to guard against the possibility of shrapnel caused by splitting along the grain. Make the disk from plywood or from two 3/4 inch boards face glued at 90 degrees to each other.

Jerry Jackson
San Antonio
Reply With Quote
  #15  
Old 06-01-2019, 08:14 AM
rkolenda rkolenda is offline
MetalShaper of the Month Nov. 2009
 
Join Date: May 2009
Location: Rockford,Michigan
Posts: 93
Default

Jerry safety is always a concern of mine.When I made my first disc I did not know what to expect so the first time it was used I suited up with a lot of layers of clothes ,face shields and my winter coat just to try it out.I leaned on it hard with no issues.I have wore out several of these discs .I know of stainless steel shrinking disc coming apart due to fractures so the same safety concerns are there also.Inspect your tools before using them is good advise. One of the things I noticed and also like about this wood disc besides not marring up your panel is what it is far less noisy than the shrill sound that a stainless disc makes.As I stated use a good piece of hardwood wood with no knots or splits.
__________________
Robert
Reply With Quote
  #16  
Old 06-01-2019, 12:00 PM
luscten luscten is offline
Member
 
Join Date: May 2012
Location: Breckenridge Texas
Posts: 84
Default

Has anybody use wood disk on 2024t3?
__________________
Randy
Reply With Quote
  #17  
Old 06-01-2019, 08:14 PM
Reno Reno is offline
MetalShaper of the Month May 2020. October 2023
 
Join Date: Nov 2018
Location: Reno, NV
Posts: 331
Default

That is slick Robert.

I had a cutoff from some really nice hardwood plywood so I made one up. I stepped with the Forstner bits for the nut and then from the back for a washer. I had cut it on the bandsaw fairly accurately so it spun with just a little vibration. I shaped it to run true on the belt sander by turning against the belt direction.

IMG_20190601_161147.jpg

IMG_20190601_174431.jpg

IMG_20190601_173213.jpg

Your correct about the lower noise, and no surface marking.
Thanks.
__________________
Eugene
Reply With Quote
  #18  
Old 06-02-2019, 09:04 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

Hi Robert,
You have presented a good technique using the wood disc instead of the metal ones - which make much noise and mark the panels so badly - and which also separate and then go rolling around the shop or neighborhood.
Not a fan of the metal ones for the above reasons.


One thought: temps seem to be 500F to 650F so annealing happens at the shrink point. What do you do with the softness in your panel?


ps - I would NOT use this or any heating method above 300F on 2024T3, as it takes the material below requisite
strength.
__________________
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
  #19  
Old 06-03-2019, 01:41 AM
Stretch Stretch is offline
MetalShaper of the Month Aug 2016, Feb 2017, Sept 2018, Dec 2020, Aug 2022
 
Join Date: Dec 2014
Location: Cornwall, England
Posts: 550
Default

Excellent idea - very useful, thanks for sharing.
Just a thought... has anyone tried it on steel? I'm thinking just for very small shrinks on large panels such as bonnets/doors etc. as a final finish without the usual marking that you get from stainless discs.
Matt
__________________
Matt Keene
www.air-Kraft.com
Reply With Quote
  #20  
Old 06-03-2019, 09:06 AM
Reno Reno is offline
MetalShaper of the Month May 2020. October 2023
 
Join Date: Nov 2018
Location: Reno, NV
Posts: 331
Default

Matt, I tested my disc on the 24 gauge I use for the Willys and it worked great. I'll take a shot of the sample when I get to the shop this morning.
__________________
Eugene
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 Off

Forum Jump

All times are GMT -5. The time now is 03:21 AM.

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