Chicago-Latrobe 44954 135° Cobalt Jobber Drill Bit .2770

Chicago-Latrobe 44954 Cobalt Jobber Bit

This Chicago-Latrobe 44954 drill bit is a cobalt jobber-length tool built for drilling hard metals such as stainless steel and high-strength alloys. Its split-point tip reduces walking and starts holes cleanly without a centre punch. The 135-degree point angle improves penetration in tough materials. Machinists and maintenance technicians choose it for precision work in production and repair environments.

Upgrading from standard high-speed steel bits

Cobalt construction resists heat and wear far better than general-purpose high-speed steel, so the bit holds its edge longer in abrasive or work-hardening metals. The TiAlN coating further reduces friction and extends life when cutting difficult alloys. The jump is worth it when drill changes slow the job or when hole quality suffers from rapid dulling. For occasional soft-metal drilling the extra performance may not be needed.

Letter size J with .2770 decimal equivalent

The bit is letter size J, giving a .2770 inch decimal equivalent suited to specific tap-drill and clearance-hole charts. Jobber length provides standard reach and flute capacity for typical through-hole and blind-hole depths. Cobalt material and split-point geometry handle high cutting temperatures without losing hardness. Non-coolant-through design limits use to applications where external cooling or peck drilling can manage chip evacuation.