Value Collection 01188788 No. 78 Hss Jobber Drill Bit

Product Description

The VALUE COLLECTION 01188788 is a No. 78 wire-size jobber-length drill bit ground from high speed steel (HSS) with a black oxide finish. Sized at 0.0160 inches in diameter, it features a 118-degree standard point angle and a regular spiral flute with right-hand cutting action. The tapered web configuration includes web thinning to reduce thrust and improve chip clearance when starting holes. At 0.875 inches overall length with a 0.1875-inch flute length, this bit is suited for precision small-hole drilling in metalworking and light fabrication tasks. Licensed trades and machine operators working in tight-tolerance applications will find this a dependable general-purpose tool.

This drill bit is rated for primary workpiece materials of steel and cast iron, making it appropriate for general-purpose metal drilling in production, maintenance, and repair environments. The straight cylindrical shank accepts standard keyless or keyed drill chucks across benchtop drill presses, hand drills, and CNC applications. No coolant-through capability is provided, so conventional flood or mist coolant applied externally is the standard approach for extended run applications.

Key Features

• No. 78 wire size, 0.0160 inches diameter for precision small-hole work
• 118-degree standard point angle with web thinning for reduced thrust on entry
• High speed steel construction with black oxide coating for corrosion and heat resistance
• Regular spiral flute with right-hand cutting direction
• Straight cylindrical shank fits standard drill chucks without adapters
• General-purpose grade rated for steel and cast iron workpieces

Compatibility

Designed as a general-purpose jobber drill bit for use in standard drill chucks accepting straight-shank bits in the 0.0160-inch diameter range.

Installation Notes

This bit is installed and removed by a licensed machinist or qualified trade technician using a standard keyed or keyless chuck. Secure the workpiece firmly before drilling to prevent walking on entry. For extended runs in steel or cast iron, apply external cutting fluid to manage heat buildup and extend tool life. Inspect the cutting edges for wear before each use, as small-diameter HSS bits are susceptible to breakage when dull or subjected to side loading.