Steve Braverman Posted April 7, 2009 Share Posted April 7, 2009 Has anyone done this? I need to make a small, round gas pedal for my father's 1925 Franklin. I have an original to copy. It has a nut molded into the rubber. Link to comment Share on other sites More sharing options...
Restorer32 Posted April 7, 2009 Share Posted April 7, 2009 Try Devcon liquid rubber , available from McMaster-Carr. Bubbles are the enemy. Link to comment Share on other sites More sharing options...
Friartuck Posted April 7, 2009 Share Posted April 7, 2009 Devcon 80 has a Shore A hardness rating of 80 (comparible to the heel of a shoe) is actually in the urethane family, and molds quite nicely. There is also an additive available if you want to make the mixture softer. Mix the two part Devcon 80 by weight (grams scale on a digital postal scale (77:23) works well. It's also available from Grainger.Chris Link to comment Share on other sites More sharing options...
Guest imported_Joe Kieliszek Posted April 9, 2009 Share Posted April 9, 2009 Hello,Not only bubbles, but pot life (about 10 minutes after fullymixed) becomes an issue- especially if you are trying tomake something in a fully enclosed mold. Locating and retaininga metal part within a molded piece also has to thought about,as the urethane does not bond to metal. Solving these issuesis half the fun though; with some trial & error, you canget really neat results.Thanks,Joe Link to comment Share on other sites More sharing options...
gundog99 Posted April 10, 2009 Share Posted April 10, 2009 Devcon, used to list a metal to rubber bonding primer which worked very well.When using Devcon, for goodness sake weargloves ,if you get any on your skin, it's next to impossible to remove. Link to comment Share on other sites More sharing options...
ex98thdrill Posted April 14, 2009 Share Posted April 14, 2009 Are you going to drive the car or show the car??If you're going to point judge, you might want to see if Junley Acuff does gas pedals. I know Hunley can do running boards to factory specs, he may do pedals as well. Link to comment Share on other sites More sharing options...
HarryJ Posted April 15, 2009 Share Posted April 15, 2009 Steve,,,,,Thanks for this post. I am preparing to replicate some rubber parts for a restoration I am doing. I hope one of the guys with some experience in this restoration technology will respond with a detailed demo. Link to comment Share on other sites More sharing options...
hddennis Posted April 15, 2009 Share Posted April 15, 2009 Steve & Harry, I don't know if this will help or not but if you search around on here there are various casting videos for rubber, silicone and resin and some have supply sources.Try Here: Howard Dennis Link to comment Share on other sites More sharing options...
HarryJ Posted April 30, 2009 Share Posted April 30, 2009 hddennis.............thanx, this is most interesting! Link to comment Share on other sites More sharing options...
keiser31 Posted April 30, 2009 Share Posted April 30, 2009 A friend near me made motorcycle turn signal lenses using the very same method, but with very hard plastic. When he showed one of them to me he threw it onto the concrete floor as hard as he could...not a chip or scratch...I was VERY impressed. Link to comment Share on other sites More sharing options...
hddennis Posted April 30, 2009 Share Posted April 30, 2009 Harry, glad you enjoyed it. Here's another I stumbled across on a model making site and wondered if it could be upscaled to replicate obsolete distributor capshttp://www.5bears.com/casting.htmHoward Dennis Link to comment Share on other sites More sharing options...
Mark Gregory Posted February 2, 2018 Share Posted February 2, 2018 Just checking anything better than this product out there ? Or is Devcon still good to use . Link to comment Share on other sites More sharing options...
Friartuck Posted February 2, 2018 Share Posted February 2, 2018 Yes, Devcon is still a good product to cast rubber. This article tells of one project, the rubber pieces that keep a door from rattling. http://www.secondchancegarage.com/public4/door-bumper-1.cfm Link to comment Share on other sites More sharing options...
Durant Mike Posted February 2, 2018 Share Posted February 2, 2018 In 1928 certain Durant models used a rubber motor mount to lessen vibration. I need to make or cast some of these from my originals. Wasn't aware of this product and with a hardness around 80 probably would be good. My other choice was to just buy the rubber blocks from McMaster Carr and cut them to fit. Might have to look into this. Anybody know of anyone that does this that I can send my original rubber pieces to? Link to comment Share on other sites More sharing options...
Spinneyhill Posted February 2, 2018 Share Posted February 2, 2018 (edited) Many years ago, Bill (William A.) Cannon published "How to Cast Small Metal and Rubber Parts" as an A5 size book, 168 pp. He will be familiar to not-so-young Studebaker enthusiasts. If you can get it into a vacuum chamber you will find it easier to remove the air bubbles before it sets with them in. I am planning on using the vacuum packing pump in the kitchen. Edited February 2, 2018 by Spinneyhill (see edit history) Link to comment Share on other sites More sharing options...
Curti Posted February 3, 2018 Share Posted February 3, 2018 A vacuum chamber will pull the bubbles to the surface. Not all bubbles escape prior to the product setting up. Pressure is the way to go. Ask the Shrock brothers how they do it. Link to comment Share on other sites More sharing options...
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