Triumph Twist Drill 011025 Drill Bit 25/64 Inch Hss

Product Description

The TRIUMPH TWIST DRILL 011025 is a 25/64 inch (0.3906 inch decimal) high speed steel mechanics drill bit designed for general-purpose drilling in a wide range of materials. Built to jobber length with a 5-1/8 inch overall length and a 3-3/4 inch flute length, it delivers consistent performance across typical workshop and field applications. The bright, uncoated finish and web-thinned, tapered web configuration reduce thrust at entry and help clear chips efficiently. A 118-degree standard point angle makes this bit suitable for a broad range of drilling tasks without requiring specialty geometry. Installed by machinists, mechanics, and trade technicians who need reliable hole quality in common materials.

This bit is rated for use in aluminum, aluminum alloy, bronze, and wood. The straight-cylindrical shank seats securely in standard keyed or keyless drill chucks. The right-hand cut and regular spiral flute type make it compatible with conventional drill presses, hand drills, and portable drilling equipment found in HVAC, plumbing, electrical, and general mechanical service environments. Series T1 designation places it in a well-established line of general-purpose jobber-length bits.

Key Features

• 25/64 inch diameter (0.3906 inch decimal) straight-cylindrical shank for standard chuck compatibility
• High speed steel construction for durability across aluminum, bronze, and wood
• 118-degree standard point angle for general-purpose entry without specialty grinding
• Web-thinned, tapered web reduces drilling thrust and improves chip evacuation
• Bright, uncoated finish - no coating buildup to affect tolerances on finish holes
• Jobber length (5-1/8 inch OAL, 3-3/4 inch flute) balances reach and rigidity

Compatibility

Designed for use in aluminum, aluminum alloy, bronze, and wood. Fits any standard drill chuck accepting a straight-cylindrical 25/64 inch shank.

Installation Notes

Secure the shank firmly in the chuck before use and confirm the drill is set to right-hand rotation. Reduce feed pressure when breaking through the back side of the workpiece to avoid tearout or bit deflection. For aluminum and bronze, use appropriate cutting fluid to extend bit life and maintain hole quality. Inspect the cutting edges before each use and replace the bit if chipping or dulling is observed.