Value Collection 01220318 31/64 in Hss Jobber Drill Bit

Product Description

The VALUE COLLECTION 01220318 is a left-hand jobber-length drill bit designed for general-purpose metal drilling applications. Built from high-speed steel (HSS) with a bright, uncoated finish, it features a 118-degree standard point angle and a regular spiral flute for efficient chip evacuation. The straight cylindrical shank measures 31/64 inch (0.4844 inch decimal) in diameter, matching the bit diameter for use in standard drill chucks. Web thinning with a tapered web configuration reduces thrust requirements at the point and improves centering performance. This bit is sized at 31/64 inch and carries an overall length of 5.875 inches, making it a standard jobber-length tool suitable for bench drills and hand-held drill equipment.

This drill bit is intended for drilling steel and cast iron in light industrial, maintenance, and fabrication settings. The left-hand cutting direction makes it particularly useful when removing broken fasteners or studs, as the counter-clockwise rotation can back out the damaged hardware during the drilling operation. It is sold individually and suited for machinists, millwrights, and maintenance technicians who require a left-hand HSS jobber drill in this specific size range.

Key Features

• Left-hand cutting direction — ideal for broken bolt and stud extraction
• 118-degree standard point angle with web-thinned, tapered web configuration for reduced thrust
• High-speed steel (HSS) construction for drilling steel and cast iron
• Bright, uncoated finish — no coating to chip or delaminate during use
• Regular spiral flute with 4.375-inch flute length for effective chip clearance
• Straight cylindrical shank at 0.4844 inch diameter fits standard drill chucks

Compatibility

Designed as a general-purpose left-hand jobber drill bit suitable for use in standard drill presses, magnetic drills, and hand-held drill equipment accepting straight-shank bits in the 0.4000 to 0.5000 inch diameter range.

Installation Notes

Left-hand drill bits require a drill press or driver capable of reverse-direction operation. Secure the workpiece firmly before drilling to prevent movement during the counter-clockwise cutting action. Use appropriate cutting fluid when drilling cast iron or hardened steel to extend bit life and reduce heat buildup. Inspect the cutting edges before use and discard the bit if the point shows chipping or excessive wear.