Drill Sharpener Overview
90˚-135˚ DRILL BIT SHARPENER MR-13B
This 90˚-135˚ Drill Bit Sharpener makes it easy to restore sharp edges. Whether you’re working steel or aluminum, this sharpener ensures your bits stay in top shape. It includes a collet chuck and 11 elastic collets, designed to fit 1/8”, 5/32”, 3/16”, 7/32”, 1/4”, 5/16”, 11/32”, 3/8”, 7/16”, 13/32”, and 1/2” drill bits for smooth operation.
Wheel Types
Polycrystalline cubic boron nitride (CBN) grinding wheel which is ideal for high-speed steel (HSS) & cobalt (HSSCO) drills
Adjustable Angles
Different jobs call for different angles. With an adjustable point angle range from 90° to 135°, you can fine-tune your drill bits to match the material and drilling speed. The built-in positioner pins let you customize the lip relief angle and refine the web style for a sharper, more efficient point. This means less force is needed when drilling, reducing cutting resistance by up to 70%. Plus, it helps prevent material crushing at the drill’s center, making deep hole drilling easier than ever.
a) 118-Degree Angle: This angle is commonly used for drilling into aluminum, brass, and mild steels. It provides a good balance between cutting efficiency and durability, ideal for general-purpose drilling.
b) 135-Degree Angle: Preferred for harder steel or nickel alloys. This angle offers a more aggressive cutting action, reducing the risk of the drill bit slipping or wandering.
c) 90-Degree Angle: Known as a center drill bit, this angle is primarily used for creating starter holes or chamfers. It is commonly employed in metalworking to produce precise center holes for further drilling operations.