Precision Twist Drill 5997606 Screw Machine Drill Bit

Product Description

The PRECISION TWIST DRILL 5997606 is a screw machine length drill bit designed for high-performance drilling in metal fabrication and machining applications. Built from high speed steel with a bright/uncoated finish, this bit features a 135-degree split point for accurate positioning and reduced walking on entry. The parabolic flute geometry promotes efficient chip evacuation, especially in deeper holes. At 17/32 inch (0.5313 inches) in diameter with an overall length of 3-7/8 inches, this stub-length bit is well-suited for work in tight setups, drill presses, and CNC turret operations. A licensed machinist or tooling technician will typically install and run this bit.

This drill bit is intended for drilling cast iron and steel workpieces in production machining environments. Its screw machine (stub) length provides increased rigidity compared to jobber-length bits, reducing deflection during high-feed drilling cycles. The straight-cylindrical shank is compatible with standard drill chucks and collet holders. The 3xD flute-to-diameter ratio and tapered web configuration support consistent performance across repetitive drilling operations in both manual and CNC setups.

Key Features

• 17/32 inch (0.5313 inches) diameter with stubby screw machine length for added rigidity
• 135-degree split point reduces entry thrust and prevents bit walking
• Parabolic flute design improves chip flow and reduces heat buildup
• Web-thinned, tapered web configuration for lower cutting resistance
• High speed steel construction handles cast iron and steel workpieces
• Bright/uncoated finish; ANSI standard compliant

Compatibility

Designed as a replacement-style screw machine length drill bit for use in standard drill chucks and collet holders accepting a straight-cylindrical shank in the 0.5000 to 0.6000 inch diameter range.

Installation Notes

Installation and use of this drill bit should be performed by a qualified machinist or tooling technician familiar with drill press, turret, or CNC machining operations. Ensure the machine is fully powered down and the spindle is locked before changing tooling. Secure the shank fully in the chuck or collet to the correct engagement depth before operation. Always wear appropriate eye protection and follow applicable ANSI machining safety standards.