abzar jahan boresh , Iran

Cobalt-containing twist drills are made from M35 or M42 high-speed steel. The cobalt percentage in the alloy varies between 5 to 8 percent by weight. This composition maintains a hot hardness of up to 65 HRC. The standard drill diameter ranges from 1 to 20 mm with a +0.0/-0.02 mm tolerance. The standard helix angle of 30 degrees optimizes metal chip evacuation. The drill point is designed with a 135-degree angle for initial penetration into hard steels. These drills perform effectively at cutting speeds of 15 to 30 meters per minute. They are suitable for alloy steels, stainless steel, and cast iron up to 45 HRC hardness.

The drill structure is enhanced by full polishing and a Titanium Nitride TiN coating. This coating reduces friction and increases wear resistance by 300%. Drills with polished flutes efficiently guide chips away from the cutting zone. A shank plating system prevents undesired slipping in the drill chuck. These drills can typically drill to depths up to 10 times their diameter. Tool life in 45 HRC steel is typically over 150 consecutive holes. Operation requires continuous lubrication with oil-based or emulsion coolants. Correct speed and feed selection is key to preventing unwanted work hardening.You can order and buy abzar jahan boresh from Iran by contacting us through whatsaap and email.
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