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Thread: Braze Repair on DoAll Saw

  1. #1
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    Braze Repair on DoAll Saw

    In the process of moving my DoAll saw we put too much force on the table and broke the cast iron table bracket. When we inspected the bracket we could see that it was repaired by brazing in the past. The first picture shows the saw with the table askew due to the broken bracket.

    1. DoAll Saw
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    If you look carefully at the following picture you can see the new crack next to the old repair.

    2. Crack and previous repair
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    For the next two pictures I have removed half of the casting, so that you can see the cracked face as well as the previous repair.

    3. Cracked face
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    4. Cracked face and previous repair
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    The first step was to vee out the crack.

    5. Crack veed out
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    Smith Oxyacetylene Torch
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    Lincoln SP-250 MIG Welder
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    16" DuAll Saw
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  3. #2
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    Re: Braze Repair on DoAll Saw

    I mounted the bracket in the table to hold all of the pieces in the correct orientation.

    6. Bracket in place for brazing
    Name:  6. Bracket in place for brazing.jpg
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    My friend John used one of my Oxyacetylene torches to preheat the casting to 900° F.

    7. Preheating with one torch
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    I used a second Oxyacetylene torch to braze the joint. I used the Lincoln pre-coated brazing rods that I picked up from Lowes. I like the pre-coated rods because it avoids stopping the brazing process to continually dip the rods into the flux can.

    8. Crack brazed
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    I covered the brazed joint with kitty litter and let it cool off overnight.

    9. Cover area with Kitty litter to cool slowly
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    I used a brass wire wheel to clean up the joint. Here are three pictures of the brazed joint cleaned up.

    10. Inside of brazed joint
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    Smith Oxyacetylene Torch
    Miller Dynasty 200DX
    Lincoln SP-250 MIG Welder
    Clausing/Coldchester 15" Lathe
    16" DuAll Saw
    15" Drill Press
    7" x 9" Swivel Head Horizontal Band Saw
    20 Ton Arbor Press
    Bridgeport
    Lincoln LE 31 MP & Lincoln 210 MP

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  5. #3
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    Re: Braze Repair on DoAll Saw

    11. Outside of brazed joint
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    12. Entire bracket repaired
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    I decided to paint the saw. The first step was to Dual Action sand the saw to blend the paint chips. I didn't bother to use primer surfacer to make the surface completely flat.

    13. Saw DA sanded
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    Here is a picture of the saw before painting for comparison

    14. Saw before painting
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    Here is a picture of the saw after I primed it.

    15. Saw primed
    Name:  15. Saw primed.jpg
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    Smith Oxyacetylene Torch
    Miller Dynasty 200DX
    Lincoln SP-250 MIG Welder
    Clausing/Coldchester 15" Lathe
    16" DuAll Saw
    15" Drill Press
    7" x 9" Swivel Head Horizontal Band Saw
    20 Ton Arbor Press
    Bridgeport
    Lincoln LE 31 MP & Lincoln 210 MP

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  7. #4
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    Re: Braze Repair on DoAll Saw

    Here is a picture of the saw painted.

    16. Saw painted
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    My friend John was in a GM plant downriver and noticed them scrapping a similar saw that was caught in a flood. He asked them to send him the selection dial for my saw, which the did. I don't typically use the selection dial, but it dresses up the saw.

    17. Close up of Job selector dial
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    This saw was built in the 40's so it is older than I. It still works fine including the blade welder, but it can only weld carbon steel blades not bi-metal.

    -Don
    Smith Oxyacetylene Torch
    Miller Dynasty 200DX
    Lincoln SP-250 MIG Welder
    Clausing/Coldchester 15" Lathe
    16" DuAll Saw
    15" Drill Press
    7" x 9" Swivel Head Horizontal Band Saw
    20 Ton Arbor Press
    Bridgeport
    Lincoln LE 31 MP & Lincoln 210 MP

  8. #5
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    Re: Braze Repair on DoAll Saw

    Looks like an excellent repair

    Saw looks great! I like the additional side piece - looks really nice there.

    I haven't learned to oxy braze yet, just tig brazing so far.
    Dave J.

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  10. #6
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    Re: Braze Repair on DoAll Saw

    Looks good


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  11. #7
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    Re: Braze Repair on DoAll Saw

    Good on you for resurrecting old iron. Looks good, wish I could braze like that.
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  12. #8
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    Re: Braze Repair on DoAll Saw

    That is a beautiful job.

  13. #9
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    Re: Braze Repair on DoAll Saw

    Thats some nice lookin work right there...good to save old stuff it seen a lot of work in its day and looks like it will see a lot more...older stuff works better most of the time and is simpler and easier to use anyway

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  15. #10
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    Re: Braze Repair on DoAll Saw

    Quote Originally Posted by Popeye an old miner View Post
    .older stuff works better most of the time and is simpler and easier to use anyway
    Truer words may never have been spoken before.
    Old stuff rocks!

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  17. #11
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    Re: Braze Repair on DoAll Saw

    Good looking repair and shop. Should last another 80 years at least
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  19. #12
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    Re: Braze Repair on DoAll Saw

    I Love repairs like this. Nice work !.
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  20. #13
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    Re: Braze Repair on DoAll Saw

    Job selector dial makes all the difference..... Looks great.
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  21. #14
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    Re: Braze Repair on DoAll Saw

    Don, you should give it a try with welding bi-metal blades. The toolroom where I used to work had WWWII tagged DoAll bandsaws! We would weld both high carbon & Bi-Metal blades on them. Great job on the saw!

  22. #15
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    Re: Braze Repair on DoAll Saw

    If they were scrapping the same saw, did you try to get the table arm off it? Just in case yours gets broken again?
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  23. #16
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    Re: Braze Repair on DoAll Saw

    I'd guess the original repair wasn't heated and/or slow cooled enough because the new crack appeared right next to the braze.

  24. #17
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    Re: Braze Repair on DoAll Saw

    Maybe he shoulda G'mawed it

  25. #18
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    Re: Braze Repair on DoAll Saw

    Quote Originally Posted by MinnesotaDave View Post
    Looks like an excellent repair
    Saw looks great! I like the additional side piece - looks really nice there.
    I haven't learned to oxy braze yet, just tig brazing so far.
    I agree that the job selector makes the saw look complete.

    Quote Originally Posted by ljmelius View Post
    Looks good
    Thanks

    Quote Originally Posted by Popeye an old miner View Post
    Thats some nice lookin work right there...good to save old stuff it seen a lot of work in its day and looks like it will see a lot more...older stuff works better most of the time and is simpler and easier to use anyway
    I like old stuff as well. When I got rid of my Putnam 1890 lathe I found a good home for it.

    1. Old 1890 Putnam Lathe
    Name:  1. Old 1890 Putnam Lathe.jpg
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    Quote Originally Posted by BluCllrPlt View Post
    Good looking repair and shop. Should last another 80 years at least
    Or at least it will outlast me.

    Quote Originally Posted by geezer View Post
    Good on you for resurrecting old iron. Looks good, wish I could braze like that.
    I see that you are located in the Midwest. If you are ever in Michigan stop by and we can play with brazing.

    Quote Originally Posted by farmersammm View Post
    That is a beautiful job.
    Thanks.

    Quote Originally Posted by flushcut View Post
    "Older stuff works better most of the time and is simpler and easier to use anyway." Truer words may never have been spoken before. Old stuff rocks!
    I have stayed away from CNC and concentrated on manual machines because I wanted to learn the craft from the bottom up.

    Quote Originally Posted by Rondo View Post
    I Love repairs like this. Nice work !.
    Thanks.

    Quote Originally Posted by John T View Post
    Job selector dial makes all the difference..... Looks great.
    I agree.

    Quote Originally Posted by JJW View Post
    Don, you should give it a try with welding bi-metal blades. The toolroom where I used to work had WWWII tagged DoAll bandsaws! We would weld both high carbon & Bi-Metal blades on them. Great job on the saw!
    I might give it a try. The problem is pushing the anneal button the correct amount. Too much and the blade is soft and fails due to fatigue. Too little and the blade cools too fast and is brittle and fails immediately.

    Quote Originally Posted by bead-boy View Post
    If they were scrapping the same saw, did you try to get the table arm off it? Just in case yours gets broken again?
    The problem is timing. My friend found the selection dial about six years ago and I broke the bracket this year.

    Quote Originally Posted by Welder Dave View Post
    I'd guess the original repair wasn't heated and/or slow cooled enough because the new crack appeared right next to the braze.
    I believe that this bracket failure was due to abuse. If you look carefully the second failure occurred near but not on the edge of the first braze repair. If the saw was never abused then neither repair would be necessary.

    Quote Originally Posted by farmersammm View Post
    Maybe he shoulda G'mawed it
    If all else fails MIG it, but it would be nasty welding over the previous braze.


    Thanks,
    -Don
    Smith Oxyacetylene Torch
    Miller Dynasty 200DX
    Lincoln SP-250 MIG Welder
    Clausing/Coldchester 15" Lathe
    16" DuAll Saw
    15" Drill Press
    7" x 9" Swivel Head Horizontal Band Saw
    20 Ton Arbor Press
    Bridgeport
    Lincoln LE 31 MP & Lincoln 210 MP

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  27. #19
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    Re: Braze Repair on DoAll Saw

    Pic. #2 showed the crack at the edge of the braze. I agree it was from abuse or it got dropped.

  28. #20
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    Re: Braze Repair on DoAll Saw

    The original braze job looked to me like it never fully wetted in leaving basically a cold joint. I have an old, old, old vise that my dad had, & got it from his dad, it's probably a hundred years old, anyway the moveable jaw was broken off, & grandad had brazed it back on sometime before my dad got it, it's been through HELL since we mounted it, the jaws are in reasonable alignment and its super strong. You can see how well the brazing flowed in and bonded, it's really a beautiful job.
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  30. #21
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    Re: Braze Repair on DoAll Saw

    Great repair. I have an old drill press some one gave me because the arm on the table had broken in two from being dropped. I repaired it the same way 25 years ago and still going strong.

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