Hertel 84579697 Jobber Drill 7/32 in Hss Tin 135 Deg

Product Description

The HERTEL 84579697 is a jobber-length drill bit designed for general-purpose holemaking in metal, wood, and composite materials. It is manufactured from high speed steel (HSS) with a titanium nitride (TiN) coating that increases surface hardness and extends tool life in demanding cutting applications. The 135-degree split point reduces the force required to start a hole and resists walking on smooth surfaces without a center punch. At 3.75 inches overall length with a 2.5-inch flute length, this is a standard jobber-series tool suited for use in drill presses, hand drills, and CNC holemaking setups. Installation and use are appropriate for machinists, maintenance technicians, and trade professionals working across HVAC, plumbing, electrical, and general fabrication tasks.

This drill bit covers a 7/32-inch diameter (0.2188 decimal inch), placing it within the 0.2000 to 0.2500 inch size range for jobber-series HSS tooling. It is a heavy-duty grade bit with a tapered web configuration and web-thinned geometry, which improves chip evacuation and reduces thrust in tougher materials. The straight-cylindrical shank fits standard drill chucks without adapters. The right-hand spiral flute and regular helix are appropriate for through-hole and blind-hole applications in ferrous and non-ferrous materials. This bit carries an NAS specification designation, indicating conformance to National Aerospace Standards dimensional requirements.

Key Features

• 7/32 inch (0.2188 inch) diameter with straight-cylindrical shank for direct chuck mounting
• 135-degree split point reduces thrust and prevents bit from walking on contact
• TiN coating increases surface hardness and extends service life compared to uncoated HSS
• Web-thinned, tapered web geometry promotes chip clearance and reduces cutting resistance
• Heavy-duty grade HSS construction rated for demanding holemaking applications
• NAS specification designation confirms dimensional conformance to aerospace standards

Compatibility

Designed as a standard jobber-series replacement or new-purchase drill bit for use in any drill chuck accepting a 7/32-inch straight-cylindrical shank across drill presses, handheld power drills, and compatible CNC toolholders.

Installation Notes

Secure the shank fully in the chuck and verify runout before use. Disengage power and lock out the drill press or tool before changing bits. Use appropriate cutting fluid or lubricant when drilling ferrous metals to reduce heat buildup and prolong coating life. Dispose of worn bits per shop safety procedures; edges are sharp and HSS tools can fracture under lateral load.