Hertel C.40N.3810 Screw Machine Drill Bit 1-1/2 in Hss

Product Description

The HERTEL C.40N.3810 is a screw machine length drill bit designed for general-purpose drilling in metal fabrication, machining, and maintenance applications. Measuring 1.5 inches in diameter with a 7.5-inch overall length, this bit is shorter than a jobber-length drill, providing increased rigidity and reduced deflection in close-clearance setups such as drill presses, turret lathes, and CNC machine tools. The 118-degree point angle is the standard geometry for drilling into mild steel, aluminum, brass, and similar workpiece materials. The bright, uncoated high-speed steel construction suits general shop use where coolant application or manual resharpening is part of routine maintenance.

This drill bit is suited for production machining, job shop work, and maintenance repair operations where a large-diameter, short-length drill is needed. The screw machine length format is commonly specified when spindle clearance is limited or when a stiffer tool setup is required to hold dimensional accuracy. It cuts in the right-hand direction and is appropriate for use in any standard right-hand spindle machine. Metalworking shops, industrial maintenance technicians, and tool-and-die operations are the primary users of this size and style.

Key Features

• 1.5-inch diameter screw machine length format for increased rigidity over jobber-length equivalents
• 118-degree point angle suits general-purpose drilling in mild steel, aluminum, and non-ferrous metals
• High-speed steel construction allows resharpening and tolerates moderate heat buildup
• Bright, uncoated finish compatible with cutting oils and water-soluble coolants
• Right-hand cutting direction fits all standard right-hand spindle machines
• 4.875-inch flute length provides adequate chip evacuation for the full depth of cut

Compatibility

Designed as a general-purpose screw machine length drill bit for use in drill presses, lathes, and CNC machine tools accepting a 1.5-inch shank or requiring a large-diameter short-length drill.

Installation Notes

Installation is performed by qualified machinists or maintenance technicians familiar with large-diameter drilling operations. Secure the bit firmly in an appropriate chuck or collet rated for the shank diameter before operating the spindle. Power down and de-energize the machine completely before changing tooling. Apply appropriate cutting fluid for the workpiece material to extend tool life and improve surface finish.