Import -22377-B Jobber Drill Bit 7/16 Inches Hss

Product Description

The IMPORT -22377-B is a high speed steel (HSS) jobber-length drill bit ground to a 118-degree standard point angle. It carries a bright, uncoated finish and measures 5.5 inches overall with a 4.0625-inch flute length. The straight cylindrical shank diameter matches the drill diameter at 0.4375 inches, making it compatible with standard drill chucks. A right-hand, regular spiral flute evacuates chips efficiently during through-hole and blind-hole operations. The web is thinned and tapered to reduce thrust and improve centering. This is a general-purpose bit suited for production and maintenance drilling tasks performed by machinists, pipefitters, HVAC technicians, and general trade professionals.

The -22377-B is rated as a general-purpose bit with aluminum and non-ferrous metals listed as the primary workpiece material. It is well-suited for drilling copper tubing brackets, aluminum enclosures, and similar non-ferrous components encountered in HVAC, plumbing, and electrical rough-in work. The 7/16-inch diameter is a commonly specified size for bolt clearance holes and conduit knockout work. Coolant-through capability is not available on this model; flood or mist cooling applied externally is acceptable practice on harder non-ferrous stock.

Key Features

• 7/16 inches (0.4375 inches) drill diameter with matching straight shank for secure chuck grip
• 118-degree standard point angle with web-thinned, tapered web for reduced entry thrust
• High speed steel construction rated for general-purpose use in aluminum and non-ferrous materials
• Bright, uncoated finish — no coating buildup to affect hole tolerance over tool life
• Regular spiral flute, 4.0625 inches long, promotes consistent chip evacuation
• Right-hand cutting direction, compatible with standard clockwise-rotation drill equipment

Compatibility

Designed as a general-purpose jobber drill bit for use with any standard drill press, hand drill, or CNC drilling equipment fitted with a chuck accepting a 0.4375-inch straight shank.

Installation Notes

This drill bit is installed and operated by machinists, pipefitters, electricians, and other trade professionals using standard drill equipment. Always secure the workpiece before drilling and operate at a spindle speed appropriate for the workpiece material and bit diameter. Inspect the cutting edges before each use and remove from service if chipping or burning is observed. No coolant-through path is present; apply external cutting fluid when drilling harder non-ferrous alloys to extend tool life.