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Old 02-19-2022, 09:42 AM
sfm1951 sfm1951 is offline
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Default Raduis brake

I m building a radius brake and needs some help. I have alot of it figured out, but I have some questions on the adjuster mounting of the bearing. I'm going to use a take up bearing for the raising , lowering , and the height adjustment( thanks Metal Manny) the question does anybody have any clear pictures of the adjuster to do this? I think the adjuster take up bearing would have to be mounted at an angle to compensate for the different size radius bars ( 1" 2" 3" etc. ) am I correct that the bearing would have to be stepped back at an angle to to keep the radius bar centered over the follow bar to be kept in position to make the radius of the bend for the follow bar to form it? If I m correct in my thinking the bearing would have to set at an angle to compensate for the difference In radius bar size. Thanks in advance, Steve
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Old 02-19-2022, 04:38 PM
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racer-john racer-john is offline
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Default Raduis brake

Steve, I am a little confused here, are we talking sheet metal or tubing here?
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Old 02-19-2022, 06:27 PM
sfm1951 sfm1951 is offline
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Default Radius brake

For sheetmetal drive shaft tunnels, rolled belly pans, and other parts
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Old 02-19-2022, 09:37 PM
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racer-john racer-john is offline
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Default Raduis brake

Thanks for the clarification, Steve.
I built one just using a pipe of suitable size with three tabs welded on and bolted to the original upper clamp bar. [to make a rolled rocker panel].
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Old 02-22-2022, 08:00 AM
sfm1951 sfm1951 is offline
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Default Radius brake

I 've done that on smaller parts. I don't know if that will give me a nice smooth bend at 180 degrees. Being the tunnel will be probably 5 feet long I don't know if I could do that by myself. Or if I have enough lead in my butt to do it anymore with 16 gauge it might be a struggle. Steve
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Old 02-24-2022, 12:38 PM
metal manny metal manny is offline
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Hi Steve, here's a rough conceptual sketch that might be helpful?
Basically you'd have to insert a short tube section into the take-up bearing inner race to hold the lever operating the forming roller so that when the axle shaft for the radius roller is removed, the lever stays in position on its bearings. This isn't vital but would make changing radius rollers much easier when threading the axle through the assembly. Obviously, the axle would be threaded into the tube of the take-up, then into the centre of the radius roller, out the other side and into the other tube in the second take-up.
The forming roller is slid up and down the lever handle on the two flange bearings on inside of lever and locked off on two clamping brackets on outside of said lever. This is simple arrangement and you might prefer adding screw adjusters here, but not necessary IMO.

Naturally, you'll need to do your own drawings to check clearances between the the fixed parts and the maximum and minimum radius roller you envisage ever having need of?
Anyways, good luck and keep us posted on how your build progresses

Radius brake.jpg
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Last edited by galooph; 02-25-2022 at 03:27 AM.
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