Chicago-latrobe 70313 Drill Bit Letter M 0.2950 in Hss Tin

Product Description

The CHICAGO-LATROBE 70313 is a jobber-length drill bit sized to Letter M, equivalent to 0.2950 inches in decimal. It is manufactured from high speed steel with a titanium nitride (TiN) coating for improved surface hardness and wear resistance. The bit features a 118-degree standard point angle, a two-flute right-hand spiral configuration, and a web-thinned, tapered web for reduced thrust during entry. Overall length is 4.375 inches with a flute length of 3.0625 inches. This is a general-purpose cutting tool suited to production and maintenance drilling operations performed by machinists, millwrights, and trade technicians.

The 70313 is designed for drilling cast iron and steel workpieces in general-purpose applications. The straight-cylindrical shank fits standard three-jaw drill chucks on hand-held drills, drill presses, and CNC machining centers. The regular spiral flute geometry promotes efficient chip evacuation in through-hole and blind-hole applications. This bit is sold individually and is appropriate for both shop and field use where consistent hole sizing to 0.2950 inches is required.

Key Features

• Letter M size, 0.2950 inches decimal equivalent for precise hole sizing
• High speed steel construction with titanium nitride coating for extended tool life
• 118-degree standard point angle with web-thinned, tapered web reduces entry thrust
• Right-hand, two-flute regular spiral promotes clean chip evacuation
• Straight-cylindrical shank compatible with standard drill chucks
• Meets DIN 338 standard for jobber-length drill bit geometry

Compatibility

Designed for use in standard three-jaw drill chucks across hand drills, drill presses, and machining centers that accept a straight-cylindrical shank of 0.2950 inches. Intended for drilling cast iron and steel workpieces as noted in the product specifications.

Installation Notes

Installation and use should be performed by a qualified machinist or trade technician familiar with rotating cutting tools. Secure the shank fully in the chuck and verify runout before drilling. Disconnect power to the machine before changing bits or adjusting chuck position. Do not exceed the rated speed range for the workpiece material and bit diameter, and ensure adequate chip clearance to prevent flute packing.