Groves saw teeth snapped while setting
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Welcome! / Forums / General Woodworking Discussions / Tools and Tool Maintenance/Restoration / Groves saw teeth snapped while setting
I was setting a couple of saws today (first time doing this).
Both saws had been sharpened and were cutting okay but jamming in the kerf after going down about 1/2″ to 3/4″ and they had absolutely no set in them as far as I could see or feel.
I used a Record 77 saw set plier.
First saw was a Warranted Superior backsaw that I got for £5 on Ebay, It was formatted as 13 PPI and I set the pliers to the maximum setting which is 12 PPI.
This saw set okay and afterwards it cuts significantly better than before and goes right down until the back reaches the workpiece.
Next I tied to set my Dad’s old Grove dovetail saw (probably was his Dad’s as well so I reckon its at least 100 years old).
It was formatted at 11 PPI and I kept the pliers at the maximum 12 PPI.
Several of the teeth fractured straight across near the root with an audible crack and looks like brittle fracture. Maybe the steel has become stressed or work-hardened from too much setting over its lifespan? (I’m not a metallurgist so that’s a guess)
So it looks like I’ll need to file down the teeth and re-cut the saw but before I go to all that effort I would appreciate any thoughts on whether the same problem will recur after I’ve done that or would the brittleness only be confined to the existing teeth rather than extending into the saw plate?