Hertel 61699823 Screw Machine Drill Bit No. 27 Hss

Product Description

The HERTEL 61699823 is a screw machine length drill bit ground to a 118-degree standard point angle and manufactured from high-speed steel with an oxide finish. Screw machine length bits are shorter than jobber-length bits, providing added rigidity and reduced deflection in tight workholding setups, drill presses, and screw machine applications. This bit cuts No. 27 wire gauge diameter, which equals 0.1440 inches, making it a common choice for tapping pilot holes, clearance drilling, and precision metalworking operations. Two spiral flutes evacuate chips efficiently during the cut. The straight-cylindrical shank seats securely in standard drill chucks and collets.

This bit is suited for general-purpose drilling in metal fabrication shops, machine shops, and maintenance environments. The screw machine length format works well in drill presses, CNC turret setups, and hand-held power tools where a shorter bit length improves stability and tool life. The oxide coating provides light corrosion resistance during storage and handling. Right-hand cutting direction is standard for conventional drill press and hand-drill operation.

Key Features

• No. 27 wire size diameter: 0.1440 inches for precise pilot and clearance hole sizing
• 118-degree standard point angle suits general-purpose drilling in steel, aluminum, and similar materials
• High-speed steel construction resists heat buildup during moderate-speed drilling
• Oxide finish provides light corrosion resistance
• Short screw machine length reduces deflection and improves rigidity versus jobber-length bits
• Straight-cylindrical shank compatible with standard drill chucks and collets

Compatibility

Designed as a general-purpose screw machine length drill bit conforming to ANSI specification, compatible with standard drill chucks and collets accepting a straight-cylindrical shank at 0.1440 inch diameter.

Installation Notes

Install and remove this bit only with the drill press or power tool fully powered off and the chuck key removed from the chuck. Secure the shank fully into the chuck or collet before operation to prevent slippage. Cutting speed and feed rate should be appropriate for the workpiece material; consult published speed-and-feed tables for high-speed steel bits in the target material. Wear appropriate eye protection whenever drilling operations are in progress.