sharpening a hole saw

[Alan m]

a few days ago i was drilling a hole with a new hole saw. i drilled a hole in the wall for a extractor fan. there was a stud in the way , the stud was supporting t+g shheting that i didnt want to take down. i ran the holesaw throught the 4inch pipe with an extension. i n it againt a block wall on one side [scared] oops. anyway its as blund as it could be on the out side but sharp on the inside. the set is worn off on the out side
do you think i could sharpen it or is it a write off.

 

[tvgordon]

I'd try to sharpen it. Take a thin grinding wheel and dress it to match the angle of the teeth.  It's much easier than trying to file them.

Tom

 

[John Bates]

If you try sharpening it, you may end up with slightly out of size saw. I would bin it.