Accupro 10359 Jobber Drill Bit Wire 21 Solid Carbide

Product Description

The ACCUPRO 10359 is a solid carbide jobber length drill bit sized to wire gauge number 21, with a decimal equivalent of 0.1590 inches. It features a 150-degree drill point angle and a three-flute spiral configuration with right-hand cutting direction. The bright, uncoated finish preserves the base carbide surface without added coating layers. At 2.5 inches overall length with a 1-inch flute length, this bit is designed for precision hole-making in metalworking, machining, and fabrication environments. It is installed and operated by machinists, tool and die makers, and skilled trade professionals working with CNC equipment or handheld precision drilling setups.

This drill bit suits applications requiring tight tolerances in small-diameter through-hole drilling. The solid carbide construction handles harder workpiece materials where high-speed steel bits lose edge retention. The regular spiral type and straight cylindrical shank make it compatible with standard drill chucks and collet holders commonly found in machine shops, production lines, and toolroom settings. Its 5xD flute-to-diameter ratio supports chip evacuation in short-to-moderate depth holes.

Key Features

• Wire size number 21, decimal equivalent 0.1590 inches
• Solid carbide construction for extended edge retention in hard materials
• 150-degree drill point angle for reduced thrust and accurate entry
• Three-flute spiral design improves chip clearance over two-flute configurations
• Bright, uncoated finish — no coating variability affecting hole diameter
• Straight cylindrical shank fits standard chucks and collet holders

Compatibility

Designed as a standard jobber length drill bit with a straight cylindrical shank conforming to ANSI specification, compatible with drill chucks and collet systems accepting a 0.1590-inch diameter shank in both manual and CNC drilling applications.

Installation Notes

This bit is installed by machinists and trade professionals using drill presses, milling machines, or CNC machining centers. Ensure the spindle is fully stopped and the machine is powered down before changing bits. Secure the straight cylindrical shank fully within the chuck or collet to the appropriate engagement depth before tightening. Solid carbide is brittle — avoid side loading, interrupted cuts beyond the bit's rated capability, or dropping the bit on hard surfaces.