Article by: JSR & MEGA Tech
The latest innovation of drill bits from MOLDINO, providing the drilling to become easier and faster in only a single drilling. The work pieces are more accurate and precise, suitable for molding industry that needs drill bits that can drill through objects with the hardness value of up to 55HRC or higher.
Carbide Oil Hole Non Step Borer H for High Hardness Material is a new series of carbide drills with internal oil hole designed specially for materials with high hardness.
The geometry of the cutting edge has been designed with a s-x thinning and low helix side flutes for a smooth and better chip evacuation. This is especially important when making a deep hole where the approach is very narrow and air coolant cannot access the deep cavity.
While drilling on hardened steel with hardness over 55 HRC, a very high heat is generated and this could damage the cutting edge. Moreover, the tool has to be operated at a low cutting speed to ensure that the cutting edge is not damaged. The cutting-edge geometry plays a critical role while machining materials with high hardness.
During machining, the heat generated is carried out by the chips, keeping the surface relatively cooler. This is possible only if the chips do not get stuck or coiled around the tip. The special tip geometry as well as the side flute design helps with the smooth flow of the chips. In addition, the drill comes with internal coolant which support the better flow of chips from the bottom. With this innovative geometry, step drilling can be avoided while also ensuring higher cutting speeds with less vibrations.
The newly developed geometry on the NSBH drill comes with ATH coating which is very strong. The coating layer effectively protects the carbide substrate and the cutting edge. The ATH coating is MOLDINO’s newly developed coating technology which has improved oxidation resistance that enables longer tool life with higher cutting efficiency on high hardened materials up to 70 HRC.
The NSBH-ATH guarantees an unmatched performance while drilling on hardened materials.
Distinctive Features of NSBH-ATH
• High toughness and cutting-edge strength for high-hardened steels.
• Smooth removal of chips by special flute shape.
Application range
• Carbon steel / Alloy steel
• Tool steel
• Pre-hardened steel
• Harden steel 45-55 HRC
• Harden steel 55-65 HRC
• Harden steel 65-72 HRC
Distinctive point of ATH Coating
• Hardness and oxidation resistance of TH coatings is further improved. Enables longer life and higher efficient when cutting high-hardness materials. (Si nano composite coating with finer crystal particles)
• Exhibits amazing performance when cutting high-hardness materials (55HRC or higher) Cold-worked die steel, HSS, tool steel.
• Long life for both dry cutting and wet cutting