Allied Machine 20411-1000 Indexable Spade Drill 31/32-1-3/8in

Product Description

The ALLIED MACHINE AND ENGINEERING 20411-1000 is an indexable spade drill designed for high-performance metal removal across a range of hole diameters. It accepts spade drill inserts and covers a working diameter range of 31/32 inches to 1-3/8 inches with a maximum drill depth of 3 inches. The straight flute geometry and steel body construction make this a rigid, short-series tool suited to production drilling on lathes, machining centers, and drill presses. The 1-inch cylindrical shank with flat provides positive drive and straightforward toolholder engagement. Licensed machinists and tooling specialists are the primary users of this type of drill body.

This spade drill body is classified as Series HP-A short length and is intended for universal workpiece materials, including ferrous metals, non-ferrous alloys, and plastics. The short body length and straight flute design make it appropriate for through-hole and blind-hole drilling in both production shop and job-shop environments. It does not include a coolant-through passage, so external flood coolant or mist is the standard cooling method. The 6-1/2-inch overall length suits standard spindle setups without excessive overhang.

Key Features

• Covers drill diameter range from 31/32 inches to 1-3/8 inches with indexable insert compatibility
• Maximum drill depth of 3 inches suits most through-hole and shallow blind-hole applications
• Straight flute design provides rigidity and chip clearance in a compact short-series body
• 1-inch flatted cylindrical shank provides secure, positive engagement in standard toolholders
• Steel body construction rated for high-performance Series HP-A service
• No coolant-through passages — compatible with external flood or mist coolant setups

Compatibility

Designed as an OEM-style replacement or direct-fit body for Allied Machine and Engineering Series HP-A indexable spade drill inserts. No specific machine model compatibility was provided by the manufacturer for this listing.

Installation Notes

Installation and setup should be performed by a qualified machinist or tooling technician. Ensure the machine spindle is fully stopped and locked out before mounting or removing the drill body. Confirm the toolholder bore and shank flat orientation are clean and within tolerance before clamping. Follow the insert manufacturer torque and seating guidelines when loading spade drill inserts into the body pocket.