Hertel 2386076 Screw Machine Drill Bit 31/64 in Hss

Product Description

The HERTEL 2386076 is a screw machine length drill bit designed for high-production drilling in metal, plastic, and similar materials. Built from high-speed steel with an oxide finish, this bit measures 31/64 inches (0.4844 inches decimal) in diameter and features a 135-degree split point that reduces walking and cutting resistance at the start of the hole. The shortened screw machine length body — 3-11/16 inches overall — provides added rigidity compared to jobber-length bits, making it well suited for drill press and CNC turret work where overhang must be minimized. A web-thinned, parallel-web construction further reduces thrust requirements during cutting.

This bit is a standard choice in machine shops, fabrication facilities, and production environments where consistent hole quality and bit longevity are priorities. The straight-cylindrical shank fits standard drill chucks without modification. Its heavy-duty grade rating makes it appropriate for repetitive drilling cycles in ferrous and non-ferrous metals. Licensed machinists, toolroom technicians, and production floor operators are the typical end users. It is also used in plumbing, HVAC, and electrical rough-in work where drilling through structural steel or heavy-gauge sheet metal is required.

Key Features

• 31/64 inch diameter (0.4844 inches decimal) for precise hole sizing
• 135-degree split point reduces bit walking and lowers entry thrust
• Web-thinned, parallel-web design decreases cutting resistance
• High-speed steel construction with oxide coating for heat and wear resistance
• Screw machine length body (3-11/16 inches OAL) adds rigidity over jobber-length alternatives
• Right-hand spiral flute with straight-cylindrical shank for universal chuck compatibility

Compatibility

Designed as an OEM-style replacement or direct-use screw machine drill bit for standard drill chucks accepting a straight-cylindrical shank in the 0.4500 to 0.5000 inch diameter range.

Installation Notes

Installation should be performed by a qualified machinist or trade technician. Secure the straight-cylindrical shank fully in the drill chuck and verify runout before beginning a drilling cycle. Always power down or de-energize the machine tool before changing bits. Follow applicable OSHA and shop-floor safety standards for rotating tooling, including proper workpiece clamping and appropriate cutting fluid application for the material being drilled.