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Repairing Band saw Blades

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ozzie46:



     
    I tore some teeth off of my 4 x6 band saw and really didn't want to go buy another one as I had 3 broken blades in the shop. While perusing DrJs' Site,


http://dr-john.org/

  he showed how he repaired his saw blades so I copied the idea.

   I grabbed some angle iron and milled a step on it and then milled a cut out in it. The step is to butt the blade up against and the cut out is so you can heat the blade.

 

  I mounted the angle in a vise and then used my belt sander to grind a scarf joint on the broken ends after they had been ground square. the scarf joint is about 1/8" wide.

  I then used miniature vice grip pliers to hold the blade to the angle iron with the joint over the cutout area. I fluxed the joint and then cut a piece of silver solder and laid in on the joint. Then I heated it till the solder flowed through the joint.

   This is the torch I used. It uses lighter butane as fuel.

 

   This what it looked like after cleaning up with a dremel with a drum sander on it.
    Be careful and don't take to much off. Just get to real close to the original blade thickness.

   

   I tried it out on the bolt that ripped the teeth off the other blade and it work flawlessly.

   Thank you DrJ.


  If you have broken blades don't throw them out try this. If I can do it you can to as I am really a novice when it comes to silver soldering.


   Ron

 

atwatterkent:
Here's another example of the same solution using a piece of 4" chanel with a slot for 1/4"-3/8" and the other side takes 1/2"-3/4" blades. The gap is 1" wide and 1/2" deep.:



I use this jig to demonstrate blade repair in the local for the local jr. college machine shop classes.

ozzie46:



   Very nice jig.  Thanks for sharing it.

   Ron

Bernd:
Unfortnatly that saw blade in the first pic isn't going to work to well.  :clap:

Anybody spot why?

Nice work on that jig by the way. Very clean. :thumbup:

Bernd

ozzie46:


   I didn't at first, but I do now. Bacards and forards.    :lol: :lol: :lol:

  Ron

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