Allied 151N-.859 Spade Drill Insert 55/64 in Cobalt Ticn

Product Description

The ALLIED MACHINE AND ENGINEERING 151N-.859 is a cobalt spade drill insert designed for high-performance hole-making in demanding industrial and machining applications. Measuring 55/64 inches in diameter with a seat size of 1, this insert fits the T-A series spade drill system. The TiCN (Titanium Carbonitride) coating is applied via a PVD process, delivering a hard, wear-resistant surface that extends tool life and maintains cutting edge integrity at elevated feeds and speeds. The 132-degree point angle provides stable entry and reduced thrust force across a range of workpiece materials. Installation is performed by qualified machinists and tooling specialists.

This insert is suited for drilling operations in steel, stainless steel, cast iron, super-alloys, and titanium, covering ISO material groups P, M, K, and S. The T-A series modular spade drill system is widely used in production environments where indexable tooling reduces cost-per-hole compared to solid twist drills. Typical applications include CNC machining centers, lathes with live tooling, and dedicated drilling equipment in job shop and high-volume production settings.

Key Features

• 55/64 inch diameter with seat size 1 for T-A series spade drill holders
• Cobalt substrate provides toughness and heat resistance over high-speed steel
• TiCN PVD coating delivers increased surface hardness and lubricity
• 132-degree point angle reduces thrust and promotes stable hole entry
• Compatible with steel, stainless steel, cast iron, super-alloys, and titanium workpieces
• Indexable design supports fast insert replacement without removing the holder from the machine

Compatibility

Designed for use with ALLIED MACHINE AND ENGINEERING T-A series spade drill holders requiring a seat size 1 insert. Verify holder seat size and insert diameter before installation to ensure proper seating and torque retention.

Installation Notes

This insert is installed and replaced by qualified machinists or tooling technicians. Always power down and lock out the spindle before changing inserts. Use the manufacturer-specified torque driver and insert screw to seat the insert securely in the holder pocket; hand-tighten with the correct key and do not over-torque. Inspect the holder seat for chips or contamination before installing a new insert.