Hertel 89321533 Screw Machine Drill Bit Size 45 Hss

Product Description

The HERTEL 89321533 is a screw machine length drill bit designed for close-quarters drilling where standard-length bits are too long to operate effectively. Built from high-speed steel (HSS) with a bright, uncoated finish, this bit features a 118-degree standard point angle and a right-hand cutting direction. The overall length is 1.75 inches with a 0.75-inch flute length, making it well-suited for work in tight spaces or on short-travel drill presses and screw machines. Wire size 45 corresponds to a decimal diameter of 0.0820 inches. Two regular spiral flutes provide efficient chip evacuation during drilling operations. Licensed machinists, tool-and-die technicians, and maintenance trades are the primary installers.

This drill bit is intended for general-purpose drilling applications in metalworking, light manufacturing, and maintenance environments. The screw machine length configuration is a standard choice when work-holding setups, fixtures, or machine travel limits make a full-length jobber bit impractical. The 0.0820-inch diameter is commonly used for tapping pilot holes, precision through-holes, and similar small-diameter work in steel, aluminum, brass, and similar materials. No coolant-through capability is present, so conventional flood coolant or cutting oil applied externally is appropriate for extended use in ferrous materials.

Key Features

• Wire size 45 with a decimal diameter of 0.0820 inches for precise small-hole work
• 118-degree standard point angle suitable for general-purpose drilling in a wide range of materials
• Screw machine length at 1.75 inches overall for use in tight spaces and short-travel setups
• High-speed steel construction provides good hardness and wear resistance for metalworking applications
• Right-hand cutting direction with two regular spiral flutes for efficient chip removal
• Bright, uncoated finish — no coating to chip or flake in demanding drilling conditions

Compatibility

Designed as a general-purpose screw machine length drill bit fitting standard straight-shank drill chucks accepting 0.0820-inch diameter shanks, compatible with benchtop drill presses, screw machines, and hand drill drivers used in metalworking and maintenance applications.

Installation Notes

Installation is performed by machinists, toolroom technicians, or maintenance trades familiar with small-diameter drilling. Secure the straight shank firmly in the drill chuck before operation and verify runout is within acceptable limits, as deflection at this diameter can cause breakage. Apply cutting oil or appropriate cutting fluid when drilling ferrous metals to extend tool life and improve hole quality. Replace the bit at the first sign of chatter, oversized holes, or burning, as regrinding a bit of this diameter is not practical in most shop environments.