Bi-Metal Hole Saw 145Mm (5-45/64") M42 Hss (High Speed Steel) Hole Saw Drill Bit Cutter For Wood Plastic Metal Sheet Plasterboard

The bi-metal hole saw combines high-speed steel and cobalt. The hole saw body is made of superior grade M42 high-speed steel, which has excellent hardness, wear resistance, and heat resistance. The cutting edges or teeth are made of a cobalt alloy, which further enhances hardness and heat resistance. The sprayed coating resists rust and corrosion. Sharp toothed edges allow for smooth, fast and easy cuts. Bi-metal hole saws have larger numbers of cutting edges than carbide hole saws, ensuring faster cutting. Side grooves or chip holes facilitate chip removal and prevent clogging, and allow coolant or lubricant to reach the cutting area, extending tool life and cutting efficiency. The hole saw can create round holes in wood, plastic, plasterboard, steel, aluminum, plywood, PVC, fiberboard, metal sheet. Suitable for various applications such as door locks, hinges, cabinets, pipes, electrical conduits, junction boxes. Used with bench drills, drill presses, electric hand drill, cordless drill, etc.. The power of hand electric drill needs to be greater than 750W. The cutting material must be fixed well, and it must be at a 90 degree angle with the hole opener. Do not use on impact drills. Before drilling, clamp or secure the workpiece firmly, and mark the center point of the hole. For larger diameter hole saws, it is recommended to start with a guide hole. Apply an appropriate lubricant according to the material being drilled (for example, oil for metal, water for wood). Use proper speed and pressure and always wear appropriate safety gear.