Precision Twist Drill 6000688 Jobber Drill 3.60mm Cobalt

Product Description

The PRECISION TWIST DRILL 6000688 is a cobalt high-speed steel jobber-length drill bit sized at 3.60 mm (0.1417 inches) diameter with a 135-degree split point. The split point geometry reduces walking on entry and lowers thrust force, making it well suited for drilling into steel and other ferrous and non-ferrous materials. An oxide and bronze straw finish provides added surface hardness and mild lubricity. The bit features a web-thinned, tapered web for improved chip evacuation and reduced cutting resistance. Overall length is 2.75 inches with a 1.53-inch regular spiral flute. Licensed machinists, tool-and-die techs, pipefitters, and maintenance mechanics commonly reach for this size when precision hole location and clean entry are required.

This bit is a general-purpose drilling tool appropriate for light to heavy-duty production and maintenance work in metal fabrication shops, mechanical contracting, and field service. It is rated for primary workpiece material categories P, M, K, N, and S under DIN 338 classification, covering carbon steels, alloy steels, cast iron, non-ferrous metals, and heat-resistant alloys. The straight cylindrical shank fits standard drill chucks without an adapter. Maximum recommended drilling depth is 1.54 inches, consistent with the jobber flute-to-diameter ratio of 11xD.

Key Features

• Cobalt HSS construction for elevated heat resistance when drilling hard steels
• 135-degree split point reduces walking and lowers entry thrust force
• Oxide and bronze straw finish adds surface hardness and mild lubricity
• Web-thinned tapered web improves chip evacuation and cutting efficiency
• Regular right-hand spiral flute, 2-flute design for clean chip clearance
• Meets DIN 338 and ANSI standards for jobber-length drill geometry

Compatibility

Designed as a general-purpose jobber drill for use in standard drill chucks accepting a 3.60 mm (0.1417-inch) straight cylindrical shank. Suitable for workpiece material categories P, M, K, N, and S as defined by DIN 338, including carbon and alloy steels, cast iron, aluminum, and heat-resistant alloys.

Installation Notes

Installation and use of this bit is performed by machinists, maintenance mechanics, or trade professionals using a drill press, hand drill, or CNC machine. Secure the straight shank fully in the chuck before operation and confirm the chuck key is removed prior to starting the spindle. Use appropriate cutting fluid or coolant when drilling steel to extend tool life and maintain hole quality. Do not exceed the rated maximum drilling depth of 1.54 inches in a single pass without retracting to clear chips.