Cleveland C70369 Screw Machine Drill Bit Set 21 Pc

Product Description

The CLEVELAND C70369 is a 21-piece screw machine length drill bit set built for metalworking and general-purpose drilling in trade and industrial environments. Each bit is manufactured from high-speed steel with a bright, uncoated finish and a 135-degree split-point tip that self-centers on contact, reducing the need for a center punch and minimizing walking on hard surfaces. The straight shank design is compatible with standard drill chucks. Cutting direction is right-hand. This set covers a size range of 1/16 inch to 3/8 inch in 1/64-inch step increments across 21 bits, providing a full working range for common hole sizes in sheet metal, structural steel, and multipurpose applications.

Screw machine length bits are shorter than jobber-length bits, which increases rigidity and reduces deflection during drilling. This makes them well-suited for use in drill presses, CNC machines, and handheld drills where precision and bit stability matter. The set meets NAS 907 specification, making it appropriate for aerospace-adjacent and heavy-duty metalworking environments. Machinists, maintenance technicians, pipefitters, and millwrights commonly use screw machine length sets for repetitive production drilling and tight-clearance work. The 21 bits are stored in a metal or plastic case for organized jobsite or shop use.

Key Features

• 135-degree split-point tip self-centers and reduces walking on hard material
• High-speed steel construction rated for heavy-duty metalworking
• Screw machine length for increased rigidity and reduced deflection
• 1/64-inch step increments from 1/16 inch to 3/8 inch — 21 sizes total
• Straight shank fits standard drill chucks
• Meets NAS 907 specification
• Includes metal or plastic storage case

Compatibility

Designed for use in standard straight-shank drill chucks on drill presses, CNC drilling machines, and handheld drills; suitable for metalworking and multipurpose drilling applications requiring screw machine length bits in the 1/16 inch to 3/8 inch size range.

Installation Notes

Secure the bit firmly in the drill chuck before operation and verify chuck key is removed prior to starting the tool. Use appropriate cutting fluid or coolant when drilling ferrous metals to extend bit life, even though these bits do not have through-coolant capability. Wear appropriate PPE including eye protection when operating drilling equipment. Inspect bits for wear or chipping before each use and replace any bit that shows damage to avoid workpiece or tool hazards.