Hertel 66694092 No.10 Hss Tin Jobber Drill 135 Split Point

Product Description

The HERTEL 66694092 is a high speed steel jobber-length drill bit sized to No. 10 wire gauge, equal to 0.1935 inches in diameter. It carries a titanium nitride (TiN) coating that increases surface hardness and reduces friction at the cutting edge, extending tool life in general-purpose holemaking applications. The 135-degree split point geometry reduces thrust force and centers the bit without a pilot hole. A tapered web with web thinning further reduces the force needed to initiate the cut. The straight-cylindrical shank measures 0.1935 inches in diameter, fitting standard keyless and keyed drill chucks. This bit is intended for machinists, maintenance technicians, electricians, plumbers, and general contractors performing production or field drilling operations.

This jobber drill is suited for holemaking in ferrous and non-ferrous metals, plastics, and composite materials where a No. 10 wire-gauge hole is required. The regular-spiral, two-flute design provides efficient chip evacuation in typical through-hole and blind-hole applications. The NAS specification designation indicates conformance to a recognized aerospace and industrial standard, making this bit appropriate for both light production and maintenance-repair-operations environments.

Key Features

• No. 10 wire size, 0.1935 inch diameter - matches standard No. 10 clearance and tap-drill requirements
• 135-degree split point with web thinning reduces thrust and self-centers without a center punch
• TiN coating increases surface hardness and extends cutting life compared to uncoated HSS
• Jobber-length overall length of 3-5/8 inches with a 2-7/16 inch flute length for versatile reach
• Right-hand spiral flute with regular helix for consistent chip removal
• Heavy duty grade construction conforming to NAS specification

Compatibility

Designed as a standard jobber-length drill bit for use in any drill press, hand drill, or CNC drilling spindle accepting a 0.1935 inch straight-cylindrical shank. Suitable for general holemaking applications in the 0.1500 to 0.2000 inch decimal inch size range.

Installation Notes

A licensed machinist or qualified tradesperson should secure the shank fully in the chuck before operating. Ensure the machine spindle is at a complete stop before changing or inspecting the bit. Apply appropriate cutting fluid or coolant to the workpiece when drilling hard metals to preserve coating integrity and cutting edge life; note that this bit does not support through-coolant delivery. Follow applicable shop safety standards and wear eye protection at all times during drilling operations.