Hertel C.E96.S29-2 Screw Machine Drill Bit Set 29pc Hss

Product Description

The HERTEL C.E96.S29-2 is a 29-piece screw machine length drill bit set designed for high-volume drilling in metal fabrication, maintenance, and mechanical trade applications. Each bit is manufactured from high-speed steel (HSS) with a titanium nitride (TiN) coating, which increases surface hardness and extends cutting life compared to uncoated HSS. The 135-degree split-point tip reduces walking on hard or slick surfaces and allows drilling without a center punch in many applications. Bits are sized in 1/64-inch step increments, covering 1/16 inch through 1/2 inch. The set ships in a metal storage case for organized jobsite or shop storage.

Screw machine length bits are shorter than jobber-length bits, providing added rigidity and reduced deflection when drilling in confined spaces or on drill presses and CNC equipment. This set is suited for machinists, millwrights, HVAC technicians, plumbers, and electricians who require consistent, accurate holes in steel, cast iron, aluminum, and similar materials. The compact stub-length profile makes these bits a practical choice for tight-clearance work inside enclosures, panels, and mechanical assemblies.

Key Features

• 29-piece set with 1/64-inch step increments from 1/16 inch to 1/2 inch
• High-speed steel construction with titanium nitride coating for extended tool life
• 135-degree split-point tip reduces bit walking and allows drilling without center punching on most surfaces
• Screw machine (stub) length profile increases rigidity and reduces deflection
• Coolant-through design is not required — compatible with standard dry or light-oil drilling
• Stored in a metal case for organized access and transport

Compatibility

Designed for use in standard drill presses, hand drills, and CNC equipment accepting straight-shank drill bits sized 1/16 inch through 1/2 inch. Suitable for drilling steel, cast iron, aluminum, and similar metals typical in HVAC, plumbing, electrical, and general mechanical service work.

Installation Notes

Secure the bit firmly in the chuck before use and verify the workpiece is clamped or fixtured to prevent movement. Use appropriate cutting fluid or cutting oil when drilling ferrous metals to reduce heat buildup and extend bit life. Inspect each bit for chipping or wear before use — damaged bits should be replaced or resharpened rather than run at reduced speed. Always wear appropriate eye protection when drilling.