Hertel 61698353 Screw Machine Drill Bit 43/64 in Hss

Product Description

The HERTEL 61698353 is a screw machine length drill bit designed for general-purpose drilling in metal, plastic, and similar materials. Built from high-speed steel with an oxide finish, it delivers consistent performance in production and maintenance environments. The 118-degree standard point provides reliable center-starting geometry across a wide range of workpiece materials. At 0.6719 inches in decimal diameter (43/64 inches fractional), this bit fits applications where a shorter-than-jobber-length tool reduces deflection and improves rigidity. Machinists, tool-and-die tradespeople, and maintenance mechanics are the primary users of this style of drill.

Screw machine length drill bits are commonly used in drill presses, CNC machining centers, turret lathes, and automatic screw machines where a compact overall length improves stiffness and positional accuracy. The 61698353 has an overall length of 4.625 inches and a flute length of 2.875 inches, making it suited for shallow-to-moderate-depth holes where tool overhang must be minimized. The straight cylindrical shank accepts standard drill chucks without requiring collets or special toolholding.

Key Features

• High-speed steel construction rated for general-purpose cutting across ferrous and non-ferrous materials
• Oxide coating reduces friction and provides basic corrosion resistance during storage and use
• 118-degree standard point angle for self-starting cuts on flat and curved surfaces
• Screw machine (stub) length at 4.625 inches overall reduces deflection versus jobber-length alternatives
• Right-hand spiral flutes with regular helix evacuate chips efficiently in typical through and blind-hole drilling
• Straight cylindrical shank fits standard drill chucks without additional toolholding hardware

Compatibility

Designed as a general-purpose screw machine length drill bit compatible with any drill press, machining center, lathe turret, or hand drill equipped with a chuck sized to accept a straight cylindrical shank at 43/64 inch diameter.

Installation Notes

De-energize and lock out all power to the machine before changing tooling. Verify chuck jaws are clean and undamaged before seating the shank, and tighten the chuck key at all three positions for even clamping pressure. Always wear appropriate eye protection and ensure workpiece fixturing is secure before starting the spindle. Consult applicable ANSI B11 machine tool safety standards for setup and operating requirements.