Chicago-latrobe 69852 Screw Machine Drill Bit Set 21 Pc

Product Description

The CHICAGO-LATROBE 69852 is a 21-piece screw machine length drill bit set engineered for metalworking and multipurpose drilling applications. Built from high speed steel with an oxide finish, the set covers sizes from 1/16 inch to 3/8 inch in 1/64-inch step increments. Each bit features a 135-degree split-point tip that reduces walking on contact and requires no center punch on most surfaces. Right-hand cutting geometry pairs with the straight shank design for use in standard drill chucks. This set is installed and used by machinists, HVAC technicians, plumbers, electricians, and general trade professionals who need consistent, repeatable hole quality in metal stock.

This set is suited for residential and commercial trade work involving metalworking and multipurpose drilling tasks. The screw machine length configuration offers a shorter, more rigid body than jobber-length bits, which improves hole accuracy in tight spaces such as sheet metal enclosures, electrical panels, pipe hangers, and structural brackets. The 1/64-inch size graduation makes it practical for a wide range of pilot, clearance, and finish hole requirements. The 21 bits store in an included metal or plastic case for jobsite organization.

Key Features

• 21-piece set covering 1/16 inch to 3/8 inch in 1/64-inch increments
• 135-degree split-point tip reduces bit walking and improves hole entry accuracy
• High speed steel construction with oxide finish for heat and wear resistance
• Screw machine (stub) length body provides added rigidity over jobber-length bits
• Right-hand cutting, straight shank — fits standard 3-jaw drill chucks
• Meets NAS 907 specification designation for quality and dimensional consistency
• Includes metal or plastic storage case for organized transport and access

Compatibility

Designed for use in standard straight-shank drill chucks on benchtop drill presses, hand drills, and magnetic base drills used in metalworking and general trade applications.

Installation Notes

Screw machine drill bits are installed and used by trade professionals working with metal substrates. Secure the bit fully in the chuck before operation and confirm chuck key is removed. Use appropriate cutting fluid or lubricant when drilling steel to extend bit life and maintain hole quality. Always wear eye protection and secure the workpiece before drilling.