Product features：1. TW-60/80 large drill grinding machine is used to grind drill bits with a diameter of 3-60/80mm. It has compact structure, convenient adjustment, simple operation, safety, reliability, durability, multiple use and stable operation; This machine is equipped with two sets of precision drill clamps and one set of clamping jaws, which are flexible and simple adjustment structure, so that its grinding range can meet the general requirements for grinding large and small drills, and can also meet the requirements for grinding drills with different back angles, sharp angles, chip grooves, horizontal edges, ladders, and double edge milling cutters and their back angles. 2. Material of grinding bit: high speed steel/hard composite steel 3. Diameter of grinding bit: 3-60mm/3-80mm 4. Type of grinding bit: ordinary fried dough twist drill, step drill, impact drill group drill, etc. 5. Parts of grinding bit: main cutting edge, horizontal edge, top angle, back angle, chip slot can be opened, and the top angle can be adjusted in a large range. Time required for grinding a 40mm drill bit: about 2-3 minutes 6. Standard configuration: two sets of M3-M60 large clamps, one set of tools, A piece of grinding wheel