Hertel 74148826 Screw Machine Drill Bit 0.1575 in Carbide

Product Description

The HERTEL 74148826 is a solid carbide screw machine length drill bit designed for precision drilling in hard and abrasive workpiece materials. It measures 0.1575 inches (4.00 mm) in diameter with an overall length of 2.125 inches and a flute length of 1.0625 inches. The 135-degree split point reduces walking and thrust at entry, while the web-thinned, parallel web construction improves chip evacuation and cutting efficiency. The slow spiral flute geometry is optimized for materials that produce short, brittle chips. Weighing 0.02 pounds, this bit is suited for use in CNC machines, drill presses, and manual machining applications where tight tolerances are required.

This drill bit is intended for drilling cast iron, nickel alloys, stainless steel, titanium alloys, and tool steel. The screw machine length format provides increased rigidity compared to jobber-length bits, making it well suited for short-reach, high-precision applications on machining centers and turret lathes. The straight cylindrical shank allows direct chucking in standard drill chucks and collet holders. This bit is a practical choice for machinists and tool-and-die professionals working with difficult-to-machine alloys.

Key Features

• Solid carbide construction for hardness and wear resistance in abrasive materials
• 135-degree split point reduces entry thrust and minimizes bit walking
• Web-thinned parallel web improves chip flow and reduces cutting force
• Slow spiral flute geometry optimized for cast iron, stainless steel, and titanium alloys
• Bright/uncoated finish suitable for applications where coating is not required
• Diameter tolerance of +0.0000 to -0.0005 inches for consistent, precise hole sizing

Compatibility

Designed as a screw machine length replacement drill bit for use in standard drill chucks and collet holders on CNC machining centers, turret lathes, and drill presses. Primary workpiece materials include cast iron, nickel alloy, stainless steel, titanium alloy, and tool steel.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or tooling professionals. Ensure the machine spindle is fully stopped and the tool holder is properly secured before inserting or removing the bit. Verify chuck or collet runout is within acceptable limits to protect the carbide shank from side-load fracture. Solid carbide tooling is brittle and should not be used in setups with excessive vibration or interrupted cuts without verifying suitability.