Chicago-latrobe 44417 Jobber Drill Bit 17/64 in Left Hand Hss

Product Description

The CHICAGO-LATROBE 44417 is a jobber-length drill bit designed for left-hand cutting applications in ferrous materials. Built from high speed steel with a bright uncoated finish, it measures 17/64 inch (0.2656 inch decimal) in diameter with a 118-degree standard point angle. The 4-1/8 inch overall length and regular spiral flute geometry make it a general-purpose tool suited for production drilling and maintenance shops. A web-thinned, tapered web design reduces thrust and improves chip evacuation. Licensed HVAC, plumbing, mechanical, and general trade technicians reach for left-hand bits when drilling out broken fasteners, since the cutting direction often backs the fastener out during drilling.

The 44417 is intended for drilling into cast iron and steel in general-purpose trade and industrial environments. Its straight-cylindrical shank seats cleanly in standard keyed or keyless drill chucks. The 2-7/8 inch flute length provides adequate chip clearance for typical through-hole and blind-hole work in the 17/64 inch size range. This bit is sold individually and is appropriate for both bench-drill and hand-drill applications where a left-hand spiral is required.

Key Features

• Left-hand cutting direction — ideal for backing out broken bolts and studs during drilling
• High speed steel construction for durability in cast iron and steel
• 118-degree standard point angle with web-thinned, tapered web for reduced thrust
• Bright uncoated finish — no coating to flake or delaminate under heat
• Regular spiral flute with 2-7/8 inch flute length promotes consistent chip evacuation
• Straight-cylindrical shank fits standard drill chucks without adapters

Compatibility

Designed as a general-purpose left-hand jobber-length drill bit for use in any standard drill chuck accepting a straight-cylindrical shank in the 17/64 inch diameter range. Primary workpiece materials are cast iron and steel.

Installation Notes

Left-hand drill bits are installed in a drill or drill press set to reverse rotation. Ensure the chuck is fully tightened and the workpiece is secured before beginning. Eye protection and appropriate work-holding are required when drilling metal. Cutting fluid is recommended when drilling steel to extend tool life and maintain dimensional accuracy.