Allied Machine 250Y0S-075F Indexable Spade Drill 3/8-27/64 in

Product Description

The ALLIED MACHINE AND ENGINEERING 250Y0S-075F is an indexable spade drill designed for precision hole-making operations across a wide range of workpiece materials. Built to T-A Y Series specifications, this extended-length drill accepts interchangeable spade blade inserts, reducing tooling cost while maintaining consistent bore quality. The 250Y0S-075F features a straight flute configuration and through-coolant capability with axial concentric coolant entry, supporting higher cutting speeds and chip evacuation in deep-hole applications. A flatted, cylindrical shank with a 3/4-inch diameter provides secure tool holding in compatible drill holders. It is intended for use by machinists and toolroom professionals working on CNC machining centers and drill presses.

This drill body covers a drilling diameter range of 3/8 inch to 27/64 inch with a maximum drill depth of 4-3/8 inches, making it well-suited for extended-reach drilling in production environments. The T-A Y Series platform is a general-purpose indexable spade drill system rated for universal primary workpiece material compatibility, including steel, cast iron, aluminum, non-ferrous alloys, high-temperature alloys, and stainless. It is appropriate for both job-shop and production machining scenarios where repeatable hole quality and rapid insert changeover are required.

Key Features

• Extended-length body at 5-17/32 inches supports deep-hole reach without a dedicated deep-hole drill
• Through-coolant design with 1/8-inch coolant hole thread and axial concentric entry improves chip flushing and tool life
• Straight flute geometry provides stability and consistent chip control in general-purpose drilling
• Flatted shank at 3/4-inch diameter resists rotational slippage in tool holders
• T-A Y Series indexable system allows blade insert replacement without removing the drill body from the machine
• Universal workpiece material rating covers steel, cast iron, stainless, aluminum, non-ferrous, and high-temp alloy families

Compatibility

The 250Y0S-075F is compatible with T-A Y Series indexable spade blade inserts and is designed for use in holders accepting a 3/4-inch flatted cylindrical shank. No additional specific model compatibility data was provided in the product documentation.

Installation Notes

Installation and setup should be performed by a qualified machinist or toolroom technician. Ensure the machine spindle is fully stopped and locked out before inserting or removing the drill body from the tool holder. Verify that the flatted shank is properly seated and the set screw engagement aligns with the flat to prevent rotation under cutting load. Confirm through-coolant supply pressure and flow rate are within the machine specification before initiating the cut, and always follow applicable shop safety protocols and machine tool manufacturer guidelines.