Precision Twist Drill 6000101 Spotting Drill 1/4 in Hss

Product Description

The PRECISION TWIST DRILL 6000101 is a 90-degree spotting drill ground from high speed steel and designed to create accurate starter holes for twist drills, reamers, and other cutting tools. With a 1/4-inch cutting diameter and a 4-inch overall length, this single-ended drill establishes precise center points without walking, reducing runout on subsequent drilling operations. The bright, uncoated finish is suitable for general-purpose work in steel, aluminum, cast iron, and similar workpiece materials. Machinists and tool-and-die professionals use spotting drills in manual mills, CNC machining centers, and drill presses wherever hole location accuracy is critical.

The 6000101 belongs to the PRECISION TWIST DRILL SPR-90 series, which covers 90-degree point angle spotting drills in a range of diameters. The 90-degree included angle matches the geometry of most standard jobber-length twist drills, allowing clean transition from the spot to the through-hole without an oversized chamfer. Typical applications include production machining, toolroom work, and prototype fabrication where tight positional tolerances are required. The straight cylindrical shank seats directly in standard collets, end-mill holders, or drill chucks without requiring special tooling.

Key Features

• 90-degree drill point angle matches standard twist-drill geometry for accurate hole starting
• 1/4-inch cutting diameter with 0.2500-inch decimal equivalent for precise tool selection
• High speed steel construction provides good wear resistance across a broad range of workpiece materials
• Bright, uncoated finish allows easy visual inspection of cutting edges and is compatible with most cutting fluids
• Spiral flute, two-flute design promotes chip clearance during spotting operations
• Straight cylindrical shank fits standard collets and drill chucks without adapters

Compatibility

Designed as a general-purpose spotting drill for use in manual mills, CNC machining centers, and drill presses accepting a 1/4-inch straight shank. Part of the PRECISION TWIST DRILL SPR-90 series.

Installation Notes

Spotting drills are installed by machinists and toolroom technicians. Secure the shank in a collet, drill chuck, or end-mill holder with adequate clamping length before running the spindle. Power down and lock out the machine before changing tooling. Use appropriate cutting fluid for the workpiece material and inspect cutting edges for wear or chipping before each use.