Series 552, Diamond Dry Hole Saws

Special tooth geometry with regular pitch provides a smoother cut and better chip clearance preventing clogging and heat built up. Teeth are alternate & side set to minimize binding and friction, requiring less feed pressure. Ideal for mild steel (up to 1000 N/mm2 hardness), stainless steel, non-ferrous metals, aluminum, cast iron, copper, zinc. X1 Fast Lock - All in one click. X2 Fast Drill - Fast drilling in all conditions. X3 Fast Bore Enlargement - A unique solution for bore enlargement. X4 Fast Plug Removal - East plug removal in one click. Bimetal Plus 8% Cobalt Premium bi-metal with 8% cobalt provides Xtreme results in performance and up to 50% longer lifetime than the competition. Tooth design Special tooth geometry with regular pitch provides a smoother cut and better chip clearance preventing clogging and heat build-up. Teeth are alternate & side set to minimize binding and friction, requiring less feed pressure. Speed kills! Operating at higher speeds than those recommended will shorten hole saw life and produce very inefficient cutting. Feed pressure: variables in material, work configuration should be considered. Apply sufficient feed pressure to aid good chip removal. Reduce the pressure when the hole saw becomes hot or if teeth start to clog with the material. Insufficient feed pressure will dull tooth points prematurely, but too much pressure can totally destroy teeth. Operating at higher speeds than those recommended will shorten hole saw life and produce very inefficient cutting. Cooling lubricant: Cutting oil serves several purposes when sawing in metals. It cools saw and workpiece, reduces heat and abrasion, which can shorten cutting life, also aids removing sward from the cutting surface. Using a cooling lubricant will extend your hole saw life by 500%. NOTE: All hole saws require an interchangeable Fast Lock™ center drill that allows changing between sizes in seconds without tools. Order center bit is determined by the size diameter of the hole saw. 552-DD1 is for 5/8" to 1-3/16" Diameter saws.   552-DD2 is for 1-1/4" to 3" Diameter saws.