A useful metal-working technique

Discussion in 'Painting, Welding, Bending and Gas Tanks' started by bluegoatwoods, Jan 20, 2014.

  1. bluegoatwoods

    bluegoatwoods Well-Known Member

    I've just about perfected a way of making good, stout brackets for mounting to frame tubes, chainstays, etc.

    I can imagine a number of uses for fastening stuff to the bike. Cargo racks, cable & wire mounts, stuff like that. Here's an example.
    finished bracket.jpg
    I started with a caliper to measure the diameter of the tube with reasonable accuracy. In the example below one of the tubes was 43 millimeters across. After a bit of experimentation, I decided that the length of the arc I was going to make should be 2.2 times the diameter. So in this case I needed 43mm X 2.2 = about 94 mm. But you need more for the 'ears'. About 25 mm each works well. So you need 94 + (25 X 2)= about 145 mm total.

    Now find something round and tough that measures 43mm across.

    Sockets work well
    bracket step 01.jpg
    bracket step 02.jpg
    bracket step 03.jpg
    bracket step 04.jpg

    I wouldn't drill the holes you need for mounting until after the bending. Those spots are liable to be a bit weak and might bend there instead of where you want it to.
     
    mikedabomb, Fabian and cpuaid like this.

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  2. james65

    james65 Member

    Good tip! Thanks
     
    Fabian and bluegoatwoods like this.
  3. cpuaid

    cpuaid Member

    Really good tips. I never would've thought about using a socket to bend metal like that.
     
    Fabian and bluegoatwoods like this.
  4. Zen builder

    Zen builder Member

    I agree with cpuaid, I never would have thought about a socket for a jig. Good idea
     
  5. darwin

    darwin Well-Known Member

    That snout on your vise Blue is made for that, lil heat helps doesn't have to be red hot. In the ole days they called that blacksmithin.
     
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