Precision Twist Drill 5997783 Cobalt Jobber Drill Bit

Product Description

The PRECISION TWIST DRILL 5997783 is a wire gauge size 63 cobalt jobber-length drill bit designed for drilling operations in ferrous and non-ferrous metals. It measures 0.0370 inches in diameter and carries a 135-degree split-point geometry with web thinning to reduce walking and lower thrust at entry. The straw oxide finish provides mild lubricity and heat resistance during operation. At 1.5 inches overall length with a 0.625-inch flute length, this is a compact, short-reach bit suited for tight-clearance drilling in production or maintenance applications. It is rated heavy duty and meets ANSI and NAS 907 specifications.

This bit is built for general-purpose drilling in steel and a broad range of workpiece materials including cast iron, non-ferrous metals, and high-temp alloys, corresponding to material codes P, M, K, N, and S. It fits standard drill chucks accepting a 0.0370-inch straight cylindrical shank. Typical users include machinists, maintenance technicians, and fabricators working with precision wire-gauge hole requirements. The bit is sold individually but requires a minimum order of 12 units per the manufacturer packaging structure. It belongs to the R10CO-R15CO-R18CO series.

Key Features

• Cobalt high-speed steel construction for improved heat and wear resistance in hard materials
• 135-degree standard point with web thinning reduces thrust and self-centers on entry
• Straw oxide coating provides surface lubricity and corrosion resistance
• Regular spiral flute with tapered web configuration promotes chip evacuation
• Straight cylindrical shank fits standard keyed and keyless drill chucks
• Meets ANSI and NAS 907 standards for heavy-duty jobber drill applications

Compatibility

Designed as an OEM-style general-purpose replacement or production drill bit for applications requiring a wire gauge size 63 (0.0370-inch diameter) hole. Compatible with any drill press, CNC machine, or hand drill accepting a straight shank at 0.0370 inches in diameter. Workpiece material codes P, M, K, N, and S are supported per manufacturer specification.

Installation Notes

Installation should be performed by a qualified machinist or technician familiar with drill press or CNC setup procedures. Secure the shank fully in the chuck and verify runout before drilling. Ensure the workpiece is clamped firmly to prevent movement during operation. Use appropriate cutting fluid or coolant for the workpiece material to extend tool life, noting that this bit does not have a coolant-through design.