Is there any benefit to variable TPI hacksaw blades where there the TPI varies from one end to the other?
I only see potential caveats:
- it might cause problems or how inconvenient it is to have only a few inches of the same TPI on a blade
- the quality and ease of cut with full strokes
- how severe issues are when cutting thin stock and you run into the coarse TPI section of the blade
One vendor's website claims:
... Tri-Cut Hacksaw Blades ... have a unique design with 3 teeth sizes on 1 blade. They feature 32 teeth/inch up front for quick starts, 24 teeth/inch in the middle and 18 teeth/inch on the end for fast and smooth conventional cutting. These hacksaw blades are ideal for general-purpose cutting.