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  #1  
Old 07-14-2005, 07:31 PM
DF5152 DF5152 is offline
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Default power hacksaw freebee

Ok i never get anything really good for free so here is my problem I got a small power hacksaw for free no motor and the drive pully was bent. no biggy for those two. Now the reason i think i got it its an old excel unit that uses a cam lever system to slowly let the blade down. this sytem is fagazied beyond my ability to repair it. so my question is will it work with the weight of the arm constantly pushing on the material or will it just ruin Blades?
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  #2  
Old 07-14-2005, 07:39 PM
Franz Franz is offline
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It will work, but blade life will suffer. Normally, a hacksaw lifts the blade clear of the cut on the backstroke to clear chips.

Stovepoker should see this post soon, and he may have either the parts or the manual for the saw, and be able to talk you thru the repair.
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  #3  
Old 07-15-2005, 07:07 AM
stovepoker stovepoker is offline
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Dan, how about a picture, and model/make data, etc?
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  #4  
Old 07-15-2005, 08:02 PM
DF5152 DF5152 is offline
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as soon as i get a chance i will snap a few pictures.

Dan
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  #5  
Old 07-16-2005, 09:27 PM
DF5152 DF5152 is offline
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Default ok here are a few picktures

the unit says excel on the name plate couldnt find a model number..
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New mig on the way
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  #6  
Old 07-16-2005, 09:30 PM
DF5152 DF5152 is offline
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another view
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Lincoln SP170T
ESAB 875 plasma
14" cold chop saw
Dynasty 200DX
O/A setup
New mig on the way
Dan's Page
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  #7  
Old 07-16-2005, 09:32 PM
DF5152 DF5152 is offline
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the little wheel has a spot worn into it and the cam on the big gear is also worn.

Can it be fixed? with it work without the cam mechanism without destroying blades?
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Dynasty 200DX
O/A setup
New mig on the way
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  #8  
Old 07-16-2005, 09:42 PM
Franz Franz is offline
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First, presuming you have the rest of the saw, yes, it can be fixed.
Build the cam and gear back up, file or grind to shape, and put the machine back together.
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  #9  
Old 07-16-2005, 10:02 PM
DF5152 DF5152 is offline
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I have the rest...the one wheel in the picture is no problem to fix its the cam im worried about. how big to bake the lobe? or does it matter? 1/8 inch or bigger?
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  #10  
Old 07-16-2005, 10:14 PM
Franz Franz is offline
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Were I attacking this, I'd go one of 2 ways. Either drill & tap the cam where the lobe was, and insert a round head screw you can adjust to determine the height of the lobe, as you cycle the machine, or take a guess, and overbuild the lobe, then grind it down a few thousanths at a time till you get it where you think it should be.
You could also experiment by inserting various thickness cardboard into the mechanism as a substitute for the cam lobe.
The height certainly isn't criticle it just lifts the blade on the return stroke, and you only need to lift it 1/16 inch.
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