Triumph Twist Drill 060430 Screw Machine Drill Bit 15/32

Product Description

The TRIUMPH TWIST DRILL 060430 is a screw machine length drill bit built for heavy-duty drilling applications in superalloys and other demanding materials. It measures 15/32 inch (0.4688 inches) in diameter with an overall length of 3-5/8 inches and a spiral flute length of 2.125 inches. The bit is manufactured from high speed steel with a coated finish to extend cutting life under hard-use conditions. A 135-degree split point reduces walking on entry and lowers the thrust needed to start a hole. Web thinning with a tapered web configuration further improves cutting efficiency. This bit is part of the T4HD series and is intended for installation by machinists and skilled trades professionals working with precision drilling equipment.

This drill bit is rated for use in screw machine or stub-length drilling setups where reduced bit overhang and improved rigidity are required. Its primary workpiece material rating is superalloy, making it suitable for aerospace, industrial, and heavy fabrication environments where standard bits fall short. The right-hand spiral flute design evacuates chips efficiently during through-hole and blind-hole drilling operations. At 0.78 pounds, it is a single-piece unit packaged individually.

Key Features

• 15/32 inch (0.4688 inches) diameter, sized within the 0.4500 to 0.5000 inch heavy-duty range
• 135-degree split point reduces entry walking and decreases required feed pressure
• Web-thinned, tapered web configuration improves cutting efficiency and chip clearance
• High speed steel construction with coated finish for extended tool life
• Screw machine (stub) length at 3-5/8 inches overall for improved rigidity in close-tolerance work
• Right-hand cut with regular spiral flute - compatible with standard drill press and CNC setups

Compatibility

Designed as a heavy-duty screw machine length drill bit in the T4HD series, suitable for use with standard straight-shank drill chucks on drill presses, CNC machining centers, and portable drilling equipment accepting cylindrical shanks in the 15/32 inch size range.

Installation Notes

This bit is installed by machinists or trades professionals using standard drill chuck equipment. Secure the straight-cylindrical shank firmly in the chuck before operation and verify runout before drilling into workpiece material. No coolant-through capability is present on this bit, so external coolant or cutting fluid should be applied when drilling superalloys or hardened materials to manage heat buildup. Inspect the cutting edges for wear or chipping before each use and replace if the split point or flute geometry is compromised.