Allied Machine 1021T-0108 Spade Drill Insert 1-1/4 in Hss Tin

Product Description

The ALLIED MACHINE AND ENGINEERING 1021T-0108 is a spade drill insert designed for high-feed, deep-hole drilling operations in production machining environments. The insert measures 1-1/4 inches in diameter with a 7/8-inch height and a 0.1875-inch thickness. Constructed from high speed steel (HSS) and finished with a physical vapor deposition (PVD) titanium nitride (TiN) coating, it delivers improved surface hardness and heat resistance compared to uncoated HSS tooling. The 130-degree point angle suits general-purpose hole-making across a range of workpiece materials. This insert fits Series A seat holders and is installed by machinists and tooling technicians in CNC and manual drilling applications.

This spade drill insert is suited for drilling into steel, cast iron, and non-ferrous metals, covering ISO material codes P, K, and N. Typical applications include production runs where replaceable insert tooling is preferred over solid-body drills for cost efficiency and setup repeatability. The insert seats into a compatible Series A holder shank, allowing quick changes without removing the full drill assembly from the spindle. It is well-suited for job shop and manufacturing environments where multiple material types are encountered across shifts.

Key Features

• 1-1/4 inch diameter with 130-degree point angle for general-purpose hole geometry
• High speed steel construction provides toughness across a range of feed and speed conditions
• PVD TiN coating increases surface hardness and reduces built-up edge on the cutting face
• Series A seat size for direct compatibility with Allied Machine Series A spade drill holders
• Rated for use in steel, cast iron, and non-ferrous metal workpieces
• Replaceable insert design reduces tooling downtime and lowers per-hole cost in production runs

Compatibility

Designed for use with Allied Machine and Engineering Series A spade drill holders. Compatible with workpiece materials classified as steel, cast iron, and non-ferrous metals (ISO codes P, K, and N).

Installation Notes

Installation is performed by a qualified machinist or tooling technician. The machine spindle must be fully stopped and the tool locked out before seating or removing the insert. Use the appropriate insert seating tool or torque wrench recommended by the holder manufacturer to secure the insert without overtightening the clamping screw. Inspect the seat pocket and insert seating surface for chips or wear before each insert change to ensure accurate positioning and runout control.