Hertel 74146499 Taper Length Drill Bit 5/32 in Cobalt

Product Description

The HERTEL 74146499 is a taper length cobalt drill bit designed for precision drilling in demanding metalworking applications. Built from cobalt high-speed steel with a TiAlN coating, this bit handles elevated cutting temperatures and extends tool life compared to standard HSS bits. The 135-degree split point reduces walking and allows the bit to cut on contact without a center punch. At 5/32 inch (0.1562 inch) diameter with a 5-3/8 inch overall length and 3-inch spiral flute, it is suited for through-hole and deeper-reach drilling tasks performed by machinists and metalworking tradespeople.

This drill bit is intended for drilling alloy steel and stainless steel in shop and field environments where standard length bits cannot reach. The taper length body provides added reach over jobber-length bits while maintaining rigidity. The straight cylindrical shank fits standard drill chucks and collet holders. Right-hand cut and spiral flute geometry clear chips efficiently during continuous drilling operations in ferrous materials.

Key Features

• Cobalt construction resists heat buildup during high-speed drilling in hard metals
• TiAlN coating increases surface hardness and reduces friction for extended tool life
• 135-degree split point starts on contact, reducing thrust force and eliminating walking
• Web-thinned, tapered web configuration improves chip evacuation and reduces cutting resistance
• Taper length body provides additional reach over standard jobber-length bits
• Straight cylindrical shank compatible with standard drill chucks and collet holders

Compatibility

Designed as an OEM-style replacement taper length drill bit for use in standard 3-jaw drill chucks and collet systems accepting a 5/32 inch straight cylindrical shank. Rated for alloy steel and stainless steel material applications.

Installation Notes

Install and remove drill bits only with the drill or machine fully powered down and the chuck key clear of the chuck. Secure the straight shank fully in the chuck with consistent clamping force before operation. Use appropriate cutting fluid or coolant when drilling stainless steel or alloy steel to manage heat, as this bit does not support coolant-through delivery. Follow applicable shop safety codes and machine manufacturer guidelines for speed and feed settings when using cobalt bits in hard materials.