Hertel 74132135 Size 16 Cobalt Screw Machine Drill Bit

Product Description

The HERTEL 74132135 is a screw machine length drill bit designed for high-speed metal drilling in tight-clearance applications where a shorter overall length provides better rigidity and control. Built from cobalt steel and finished with a TiAlN coating, this bit handles hard and abrasive workpiece materials including stainless steel, hardened alloys, and heat-resistant superalloys. The 135-degree split point starts on contact without a center punch, reducing walking and improving hole location accuracy. At 2.1875 inches overall length with a 1.125-inch flute length, this is a compact tool suited for production and maintenance machining environments. It is installed and operated by machinists, toolroom technicians, and maintenance professionals.

This bit is used in screw machine setups, drill presses, CNC machining centers, and hand-held power drilling applications where a stubby, rigid tool is preferred over jobber-length geometry. The straight cylindrical shank fits standard drill chucks across a wide range of machine tool spindles. Its wire gauge size 16 designation corresponds to a decimal diameter of 0.1770 inches, placing it in the 0.1500 to 0.2000 inch size range. It is well suited for repetitive hole production in metal fabrication, maintenance repair, and toolroom operations.

Key Features

• Cobalt steel construction for elevated heat and wear resistance in hard-material drilling
• TiAlN coating extends tool life and reduces friction at high cutting temperatures
• 135-degree split point eliminates center-punching and reduces thrust force
• Web-thinned parallel web geometry improves chip evacuation and reduces cutting resistance
• Screw machine length body provides superior rigidity over jobber-length bits in the same diameter
• Right-hand spiral flute with straight cylindrical shank fits standard drill chucks without adapters

Compatibility

Designed as a screw machine length replacement or production drill bit for any drill press, turret lathe, CNC machining center, or hand-held drill accepting a straight cylindrical shank in the 0.1770-inch diameter class.

Installation Notes

A licensed machinist or qualified maintenance technician should install this bit into a properly rated drill chuck, confirming the shank seats fully and the chuck is tightened to specification before operation. Always power down and lock out the machine spindle before changing tooling. Use appropriate cutting fluid or coolant for the workpiece material being drilled, noting that this bit does not support through-coolant delivery. Inspect the cutting edges and coating condition before each use and replace the bit if chipping or coating breakdown is observed.