Chicago-Latrobe 43627 27/64 in 135 Degree Jobber Drill Bit

27/64 in Jobber Drill Bit

This 27/64 inch jobber length drill bit is built for general-purpose drilling in metal, wood and plastic. The high-speed steel body with TiCN coating resists wear and heat during repeated use. A 135 degree split point reduces walking and starts holes cleanly without a centre punch. It suits maintenance technicians, fabricators and DIY users who need a reliable fractional-size bit for everyday tasks.

Suits standard drilling, not coolant-fed work

The split-point geometry and TiCN finish give good chip evacuation and edge life in mild steel, aluminium and composites. Builders who need through-coolant delivery or multiple coolant holes should look elsewhere, as this bit has zero coolant holes and is not designed for high-pressure flood or mist systems. It also lacks specialised geometries for hardened alloys or deep-hole drilling beyond typical jobber reach.

Handles 0.4219 in holes in common materials

The decimal equivalent of 0.4219 inches defines the exact hole size this bit produces. It comfortably drills through sheet metal, structural sections and timber up to the full jobber flute length. In very hard steels or abrasive composites the cutting edges will dull faster than on dedicated carbide tooling, and the absence of coolant holes limits sustained high-speed runs in deep cavities.