Bi-metal hole cutters 19-68 mm, set 7 pcs

GRAPHITE bi-metal holesaws 19-68 mm, set of 7 pieces 56T723 by GRAPHITE with a height of 51 mm (for 19, 29, 33 mm diameters) and 44 mm (for 51, 68 mm diameters) allow drilling to a depth of 38 mm. They are made of HSS and are equipped with 1/2'' x 20 UNF (19, 29 mm), 5/8" x 18 UNF (33, 51, 68 mm) threads. Designed to work in metal, stainless steel (Inox), cast iron, brass, aluminium and wood. GRAPHITE holesaws are recommended to be used with the adapters offered in the kit - 3/8 Hex and 7/16 Hex. Maximum speeds for these tools, vary depending on the material: steel - 460 rpm (for a diameter of 19 mm), 300 rpm (for a diameter of 29 mm), 260 rpm (for a diameter of 33 mm), 170 rpm (for a diameter of 51 mm), 130 rpm (for a diameter of 68 mm); Inox steel - 230 rpm (for a diameter of 19 mm), 300 rpm (for a diameter of 29 mm), 260 rpm (for a diameter of 33 mm), 170 rpm (for a diameter of 51 mm), 130 rpm (for a diameter of 68 mm); Inox steel - 230 rpm (for a diameter of 19 mm)./rpm (for 19 mm diameter), 150 rpm (for 29 mm diameter), 135 rpm (for 33 mm diameter), 85 rpm (for 51 mm diameter), 65 rpm (for 68 mm diameter); aluminium - 690 rpm (for 19 mm diameter), 450 rpm (for 29 mm diameter), 390 rpm (for 33 mm diameter), 255 rpm (for 51 mm diameter), 130 rpm (for 68 mm diameter); stainless steel - 150 rpm (for 33 mm diameter), 150 rpm (for 51 mm diameter), 130 rpm (for 51 mm diameter); stainless steel - 230 rpm (for 19 mm diameter), 150 rpm (for 29 mm diameter), 135 rpm (for 33 mm diameter), 85 rpm (for 51 mm diameter), 65 rpm (for 68 mm diameter); aluminium - 690 rpm (for 19 mm diameter), 450 rpm (for 33 mm diameter), 255 rpm (for 51 mm diameter)/rpm (for diameter 51 mm), 190 rpm (for diameter 68 mm); wood - 680 rpm (for diameter 19 mm), 450 rpm (for diameter 29 mm), 390 rpm (for diameter 33 mm), 200 rpm (for diameter 51 mm), 165 rpm (for diameter 68 mm); cast iron - 300 rpm (for diameter 19 mm), 200 rpm (for diameter 29 mm), 200 rpm (for diameter 33 mm), 200 rpm (for diameter 33 mm), 165 rpm (for diameter 33 mm); cast iron - 300 rpm (for diameter 29 mm), 200 rpm (for diameter 33 mm), 200 rpm (for diameter 33 mm), 200 rpm (for diameter 51 mm), 190 rpm (for diameter 68 mm)./(for 29 mm diameter), 175 rpm (for 33 mm diameter), 115 rpm (for 51 mm diameter), 85 rpm (for 68 mm diameter); brass - 600 rpm (for 19 mm diameter), 400 rpm (for 29 mm diameter), 345 rpm (for 33 mm diameter), 230 rpm (for 51 mm diameter), 165 rpm (for 68 mm diameter). The bi-metal holesaws are designed to be used with a drill or drill/driver.