We are offering screw tap grinder , specialize in grinding screw tap. Its precise, easy operation and efficient, also can save large sum of expense for purchasing blade annually. Send you taiwan diamond wheel can be secondary re-used, with accurate angle and long service life. The electrical controlled high-rate dc motor features stable power, strong horsepower, efficient and long service life. Patent product y5b can grind all the front cutting face, also include the front cutting lip. model mr-y5cdiameter m16-m42power 220v250wspeed 4000rpmpoint angle 5-30product size 423130cmweight 27kgstandard equipment grinding wheel :cbn (for hss) 1nine collets: 1314161820 23252830two collet chucks: 3 flutes1 piece; 4 flutes1 pieceoption equipment grinding wheel :sd (for carbide).