Cle-Line C18654 135 Degree Heavy-Duty Parabolic Jobber Length Drill Bit

Cle-Line C18654 135° Jobber Drill Bit

The Cle-Line C18654 is a heavy-duty jobber length drill bit designed for general-purpose metal drilling. It features a 135-degree split point geometry that reduces walking and starts accurately on contact. The high-speed steel construction provides durability for demanding workshop tasks. A titanium nitride coating adds surface hardness and extends cutting life.

Suited for fractional-inch metalwork.

This bit suits machinists and maintenance technicians drilling 7/16 inch holes in steel or alloy materials. The split point design helps operators who need precise hole placement without centre punching. Buyers requiring through-coolant delivery or coolant hole configurations should look at alternative tooling. The non-coolant-through design limits its use in high-volume production environments needing internal lubrication.

7/16 inch capacity with TiN wear resistance

The .4375 decimal equivalent diameter handles standard fractional sizing for bolt clearance and tapping applications. High-speed steel substrate withstands typical jobber length drilling forces in ferrous materials. TiN coating improves heat resistance and reduces friction during extended cutting cycles. The tool reaches its limit in hardened steels or exotic alloys requiring carbide substrates or specialised geometries.