Import -20912-10 Mechanics Drill Bit 1/4 in 135 Deg Hss

Product Description

The IMPORT -20912-10 is a mechanics-length high-speed steel drill bit designed for general-purpose drilling in metal and hard materials. It measures 1/4 inch (0.2500 inch decimal) in diameter with a 3-1/2 inch overall length and a 2 inch flute length. The 135-degree split point reduces walking on entry and requires no center punch on most surfaces. The oxide finish provides a basic level of surface hardness and heat resistance. This bit is installed by machinists, maintenance techs, and HVAC or plumbing tradespeople who drill sheet metal, structural steel, or equipment panels in the field or shop.

This drill bit is suited for drilling carbon steel, cast iron, high alloy steel, high tensile strength alloy, stainless steel, and general steel stock. The mechanics-length body offers a shorter, stiffer profile compared to jobber-length bits, making it well suited for confined-space drilling or applications where bit deflection is a concern. The Weldon flat shank with three flats ensures positive engagement in the chuck and prevents bit rotation under torque load.

Key Features

• 135-degree split point reduces drill walk and cutting force on entry
• Mechanics length (3-1/2 inch OAL) provides added rigidity over standard jobber bits
• Weldon flat shank with 3 flats prevents slippage in compatible chucks
• High-speed steel construction handles carbon steel, cast iron, stainless steel, and high alloy steel
• Oxide coating adds surface hardness and basic heat resistance
• Right-hand spiral flute with web-thinned, parallel web configuration for efficient chip evacuation

Compatibility

Designed as a general-purpose mechanics-length drill bit for use with standard Weldon-shank-compatible drill chucks and holders in 1/4 inch capacity. Suitable for hand drill, drill press, and magnetic drill applications that accept a Weldon flat shank.

Installation Notes

Installation and use should follow standard machine tool safety practices. Secure the workpiece before drilling and ensure the chuck or holder is rated for the Weldon flat shank profile. Wear appropriate eye protection and follow applicable shop safety codes. Do not exceed the rated speed range for the bit diameter and workpiece material to avoid premature wear or bit breakage.