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Tinsmith Avenue For those seeking knowledge on past techniques used by yesteryears tinsmiths. The history of Tinsmith goes back in time farther then this place can travel, but for those who want to explore, please share your findings here.


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  #11  
Old 03-23-2011, 05:13 PM
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John, I would really like to see a closeup or sideview picture of the mold on your brake....always have wondered how those work...and how the material is clamped in etc...I do all my radius work by series of bends....teadius, but does work.
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Old 03-24-2011, 03:38 PM
cactassdupree cactassdupree is offline
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Wink molds

We use some old molds some old timer made years ago. I've made 5 & 6 " half round gutter drip combo for some of the roofs we've done. K style (OG) too. A series of bends? does it leave small kinks in the face? I worked in a shop once that it would do that if u didn't set it up right. U had to kick it slightly and advance the metal little seems like 1/8 at the most each kick. peace dupree
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Old 03-24-2011, 04:15 PM
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Quote:
Originally Posted by cactassdupree View Post
A series of bends? does it leave small kinks in the face?
Most of time I am doing this with 20ga Cold roll and at about 3/32 between bends....made a lot of rocker panels this way and NO....if you bend it just enough where you see it move....thats it.
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Old 03-24-2011, 07:16 PM
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Default nose bar cap

When I need to keep brake marks out of my piece with step braking I set the nose bar back about 1/4" or so and put a u stock over the nose end. This makes for more of a rolled bend without any possible brake marks. I tape it there and lift my leaf in place and lock the leaf rod wire. Then hammer handle away as you pull the workpiece. I try at least a 6" trial piece first to determine the right set up.
Just got my order for some coated .032 and some 20 oz. today for some home projects. Can't wait to start tomorrow.
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Old 03-26-2011, 06:01 AM
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Here's a profile of two forms. The 1/2" part of the form [mold] rests on the leaf of the brake.
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Old 03-26-2011, 06:08 AM
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Sequence of brake's. Notice the spring back.
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  #17  
Old 03-26-2011, 06:20 AM
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Default Doggs

I oil quenched them after bending with heat,so hillbilly heat treat.
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  #18  
Old 03-26-2011, 06:42 AM
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Great pics....Thanks...So you really don't use the apron to bend the radius part...correct ? I also take it that the hold down dogs are to hold the mold on the brake ? I always wondered how this worked...and I see you have your Best friend there to help
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Old 03-26-2011, 07:00 AM
john_galt john_galt is offline
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The doggs work really well, those old timers were smart. For a long part I would take a one
by four to bend the metal over the form. I saw a brake [pic] with an attachment to do this, it was an old one and I think it's in the library on this site, I'll try to find it, Niagara maybe.
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Old 03-26-2011, 07:58 AM
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Default Hold down dogs

Hold down doggs look great. Dog hold down looks great also. I wish I could find some of those old forged doggs they used back in the day. I'll research and see if the maker is still distributing.
Your forms are nice and rounded, I think better than wood, I guess the reason being that maybe wood was used because of cost and ease of fabrication and purpose served. I do remember that we had to remove the apron spacer bar on the front to use at least one of them. Maybe it was the 5/8" one which gave a larger radius than that with the spring-back you mentioned.
I guess since I'm not going for an award in historical trade renovation having to own original wood forms or replicas I think I am going to develop a bar out of nylon or stainless where I can interchange half round stock into it. That way I could just leave it dogged to the leaf and just change the tops.
Also I can have more variety of tops and can substitute wood if needed. I'm also sketching up another brake piece that slips over extended apron hinge pins that I can use to swing another back brake bar to continue another formation after the first bend or to do an inside roll without flipping the piece. I'll do some calculations and show it when I finish.
John thanks much for all of this valuable information and it is a pleasure to actually see all the details of your set up. You really sparked my brain's boiler to fire up and now I'm spinning gears creating all kinds of new forming tools for my brake. I'll post pics when I get there.
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