Allied Machine 250Y0H-075F Indexable Spade Drill Helical Flute

Product Description

The ALLIED MACHINE AND ENGINEERING 250Y0H-075F is an indexable spade drill designed for precision hole-making in a wide range of workpiece materials. Built on the T-A Y Series platform, it accepts replaceable spade blade inserts, reducing tooling costs while maintaining consistent bore geometry. The drill features a helical flute configuration and through-coolant capability via a 1/8 inch NPT axial concentric coolant entry, supporting chip evacuation and heat management at depth. With a maximum drilling depth of 4-3/8 inches and an overall length of 7-9/16 inches, this tool is suited for extended-reach applications in production and job-shop environments. Tool material is steel throughout the body.

This drill is rated for general-purpose performance across universal workpiece materials, including material groups H, K, M, N, P, and S - covering steels, stainless, cast iron, non-ferrous alloys, high-temp alloys, and plastics. The flatted cylindrical shank measures 3/4 inch in diameter and is sized for standard toolholders used on CNC machining centers, lathes with live tooling, and dedicated drill presses. The extended-length body makes it appropriate for applications requiring reach beyond standard drill depth, such as deep-feature bores in structural components or manifold bodies.

Key Features

• Helical flute geometry supports chip flow and coolant distribution at depth
• Through-coolant design with 1/8 inch NPT axial concentric entry for high-pressure coolant delivery
• Indexable spade blade system allows insert replacement without changing the drill body
• Extended-length classification with 5-17/32 inch body length and 4-3/8 inch flute length
• Flatted cylindrical shank provides positive rotational drive in compatible toolholders
• General-purpose tool performance rating across six primary workpiece material groups

Compatibility

Designed for use in the T-A Y Series indexable spade drill system. Compatible with workpiece material groups H, K, M, N, P, and S as specified by the manufacturer. Accepts T-A Y Series spade blade inserts sized for the 3/8 to 27/64 inch diameter range.

Installation Notes

Installation and operation should be performed by a qualified machinist or tooling technician. Ensure the machine spindle and toolholder are fully powered down and locked out before mounting or removing the drill body. Verify toolholder bore size and retention style are compatible with the 3/4 inch flatted cylindrical shank before clamping. When activating through-coolant, confirm coolant system pressure and flow rate are within the machine and insert manufacturer specifications before initiating a cut.