Matework M35 Cobalt Step Drill Bit Set, Four Spiral Flute Step Bit (1/8"-7/8")

FOUR FLUTE STEP DRILL BIT - Ordinary step drills are prone to deflection during cutting, but four Flute step drill are more stable in cutting. The service life is twice as long as that of ordinary step drills, the drilling accuracy is significantly improved, and the cutting speed is faster when drilling, which has a unique effect on stainless steel drilling.
M35 COBALT HSS - M35 cobalt HSS can obtain high hardness (HRC 64-66), high red hardness and high wear resistance through proper heat treatment. Its toughness and bending strength are higher than ordinary high-speed steel, and it is better for hard materials.
TiAlN COATING - As a new coating material in the past two years, TiAlN coating has excellent characteristics such as high hardness, high oxidation temperature, good thermal hardness, strong adhesion, small friction coefficient, and low thermal conductivity.
135°CUTTING ANGLE - The increased angle of the drill tip is more suitable for drilling hard materials than 118°. The larger the included angle, the smaller the self-wear and the larger the stress area.
TIPS - Due to high-speed rotation, the temperature of the drill bit will continue to rise. It is recommended to add cutting oil or spray water to cool down when working continuously, which can effectively improve the service life of the step drill bit.