Hertel 2386290 Screw Machine Drill Bit Size 22 Hss

Product Description

The HERTEL 2386290 is a screw machine length drill bit designed for high-speed, close-tolerance drilling in metalworking applications. Built from high-speed steel with an oxide finish, it runs a Size 22 wire gauge diameter of 0.1570 inches and an overall length of 2.125 inches. The 135-degree split point and web-thinned geometry reduce walking at entry and lower the thrust required to start the cut. The shortened screw machine length provides added rigidity compared to jobber-length bits, making it well-suited for production drilling in lathes, drill presses, and screw machines where chatter and deflection must be controlled.

This bit is used in precision metalworking environments where wire-gauge size drills are specified on engineering drawings. The 1.0625-inch spiral flute length handles typical stock thicknesses encountered in screw machine work, turret lathe operations, and manual drill press setups. The straight-cylindrical shank seats securely in standard chucks and collets. Right-hand cutting direction matches conventional drilling spindle rotation. The oxide coating provides a mild level of lubricity and corrosion resistance for general-purpose ferrous and non-ferrous stock.

Key Features

• Size 22 wire gauge diameter — 0.1570 inches for precise hole sizing to specification
• 135-degree split point with web thinning reduces entry thrust and minimizes bit walking
• Screw machine length (2.125 inches OAL) adds rigidity over jobber-length equivalents
• High-speed steel construction handles intermittent and continuous drilling on steel, aluminum, and similar materials
• Oxide finish provides light lubricity and corrosion resistance during storage and use
• Straight-cylindrical shank fits standard drill chucks and collets without modification

Compatibility

Designed as an OEM-style replacement or direct substitute for wire-gauge screw machine drill bits in the 0.1500 to 0.2000 inch decimal inch range, compatible with standard drill chucks and collet systems accepting a 0.1570-inch straight shank.

Installation Notes

Installation is performed by machining professionals and toolroom technicians in lathe, screw machine, and drill press setups. Secure the shank fully into the chuck or collet and verify concentricity before running the spindle. Always power down and lock out the machine before changing tooling. Follow shop-standard feeds and speeds for the workpiece material and consult applicable OSHA machine guarding requirements when operating drilling equipment.