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Surfacing

Chris Cramer

Chris Cramer

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For the pair of shears I'm working on, I'm trying to find the best technique to level both blades flush with each other for them to cut properly. I tried using my forge and my 20 ton hydraulic press but the surface is not left flat. I do have a backing plate attached to my belt grinder but that requires me to run the blade across the belt horizontally which is hard to get even, and I don't have a surface grinder.
 
I would suggest using a milling machine. I resharpened and faced the shear cutting edges on my ironworker in the mill.
High speed steel needs a carbide tool, and cut slowly.
 
I'm no expert, but I don't think they are planar flat. I've mistakenly misinterpreted slight air gap as bent, but I think that is a prerequisite.

go to about 2:40


about 3:30
 
PeterT said:
I'm no expert, but I don't think they are planar flat. I've mistakenly misinterpreted slight air gap as bent, but I think that is a prerequisite.
Click to expand...

I'm no expert either, but I agree. Even my best scissors have very slight arc in both blades. But the ground shear edge is straight.
 
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