Triumph Twist Drill 060427 Screw Machine Drill Bit 27/64 in

Product Description

The TRIUMPH TWIST DRILL 060427 is a screw machine length (stub) drill bit engineered for heavy-duty drilling in metal and industrial materials. Built from high-speed steel with an oxide coating for added surface hardness and corrosion resistance, it features a 135-degree split point that reduces walking on entry and lowers the thrust needed to start a hole. The web-thinned, tapered-web design keeps cutting forces manageable throughout the full 2-inch spiral flute length. Right-hand cutting with a straight cylindrical shank, this bit fits standard drill chucks without modification. It is part of the T4HD series, which is rated for heavy-duty production and maintenance use.

This bit is suited for machinists, maintenance technicians, and fabricators working on short-reach drilling applications where a stub-length bit provides added rigidity and reduced deflection compared to jobber-length drills. The screw machine length format is common in drill press, CNC, and manual machining operations where close-tolerance hole location matters. The 27/64-inch diameter and 3-3/8-inch overall length make it a practical choice for clearance holes, stepped drilling, and pre-tap operations in steel, cast iron, aluminum, and similar materials.

Key Features

• High-speed steel construction rated for heavy-duty drilling applications
• Oxide coating improves surface hardness and provides basic corrosion resistance
• 135-degree split point reduces bit walking and cutting entry thrust
• Web-thinned, tapered-web geometry lowers cutting resistance throughout the flute
• Stub screw machine length adds rigidity and minimizes deflection
• Straight cylindrical shank fits standard 3-jaw and keyless drill chucks

Compatibility

Designed as a direct-fit replacement or standard addition for any drill press, CNC machining center, or hand drill using a straight-shank chuck sized to accept a 27/64-inch diameter bit.

Installation Notes

This bit is installed and serviced by machinists, tool-and-die technicians, and maintenance professionals. Always power down and lock out the machine before changing bits. Seat the shank fully and evenly in the chuck before tightening to prevent runout. Use appropriate cutting fluid for the workpiece material to extend bit life and maintain hole quality.