Value Collection 01188770 No. 77 Hss Jobber Drill Bit

Product Description

The VALUE COLLECTION 01188770 is a No. 77 wire-gauge jobber drill bit ground from high speed steel (HSS) with a black oxide finish. It is designed for general-purpose drilling in steel and cast iron. The bit measures 0.875 inches in overall length with a 0.1875-inch flute length and a 0.0180-inch diameter. The 118-degree standard point angle suits a wide range of common drilling applications in metal fabrication, maintenance, and repair work. The oxide coating provides a basic level of lubricity and corrosion resistance during use. Installation is performed by machinists, maintenance technicians, and trade professionals working with small-diameter precision holes.

This bit is suited for applications requiring small-diameter, precise holes in ferrous materials such as mild steel and cast iron. The right-hand spiral flute with regular spiral geometry clears chips efficiently during drilling. Typical use cases include tapping pilot holes, instrument and electrical panel work, and general bench or machine drilling where wire-gauge sizing is specified. The straight cylindrical shank fits standard drill chucks across bench drills, drill presses, and hand drills.

Key Features

• No. 77 wire size — 0.0180-inch diameter for precision small-hole work
• 118-degree standard point angle for general-purpose use in steel and cast iron
• High speed steel construction with black oxide coating for durability and lubricity
• Right-hand cut with regular spiral flute geometry for efficient chip evacuation
• Web-thinned tapered web reduces thrust requirements at the cutting edge
• Straight cylindrical shank fits standard drill chucks without adapters

Compatibility

Designed as a general-purpose wire-gauge jobber drill bit for use in standard drill chucks accepting a 0.0180-inch straight shank, compatible with bench drills, drill presses, and hand-held drilling equipment configured for small-diameter bits.

Installation Notes

Secure the straight shank firmly in the drill chuck before operation and verify runout is within acceptable limits for the diameter. When drilling steel or cast iron, use a cutting fluid or light machine oil to extend bit life and improve hole quality. Work at appropriate spindle speeds for the 0.0180-inch diameter — small-diameter bits require higher RPM than larger bits to maintain proper surface footage. Inspect the bit for chipping or wear before each use, as small-diameter HSS bits are susceptible to breakage under side load or excessive feed pressure.