Erbauer Bi-Metal Holesaw 35mm
Why pay more
Just cut 20 holes in 5mm black mild steel and only lost one tooth on this cutter, Iâd say it would cut another 10 or more before it's done. I have been using this type of cutter professionally for over 25 years and this is as good quality as any of the top brands.
Remember though like any cutter you need to look after the teeth, as the pilot drill brakes through don't let the cutter drop onto the work - guide it slowly under control otherwise you will both bend the pilot drill and brake teeth, make sure you don't have too high a cutting speed- swarf turning blue means you are cutting at too high a speed, also use a cutting oil or coolant will prolong the life and help keep the teeth cool. This type of cutter is really meant for metal although you can cut wood etc but don't expect the edge to last if you cut plasterboard and it will go blunt within seconds on brick or other ceramics.
24 Aug 2014