Accupro 775222 End Mill Holder BT40 5/8 Inch Through Coolant

Product Description

The ACCUPRO 775222 is a BT40 taper shank end mill holder designed for CNC machining centers that require precise tool holding and through-coolant delivery. The holder accepts a 5/8 inch bore, features a 2.5 inch projection, and maintains a total indicator reading (TIR) of 0.0002 inches for close-tolerance work. Coolant is delivered via through-spindle and DIN flange porting, keeping the cutting zone clear and extending tool life during demanding material removal operations. Machinists and tool crib personnel working on BT40-equipped machining centers will find this holder suited to high-speed and production-floor applications, with a balanced-to speed rating of 30000 RPM.

This end mill holder is intended for use in BT40 spindle machining centers across light manufacturing, job shop, and production environments. It is appropriate for milling operations where coolant-through capability is required and where runout control is critical to part quality. The M16 x 2.0 drawbar thread is standard for BT40 tooling systems, making this a direct-fit replacement or addition to existing BT40 tool libraries.

Key Features

• BT40 taper shank for direct spindle mounting on BT40 machining centers
• 5/8 inch bore diameter for standard end mill shanks
• 2.5 inch projection for clearance in typical milling setups
• Through-spindle and DIN flange coolant delivery for effective chip evacuation
• TIR of 0.0002 inches for precise runout control
• Balanced to 30000 RPM for high-speed machining compatibility

Compatibility

Designed for use with BT40 taper spindle machining centers using M16 x 2.0 drawbar thread and compatible with through-spindle coolant and DIN flange coolant systems.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician with the spindle powered down and the machine in a locked-out, tagged-out state per facility safety procedures. Use the appropriate BT40 tool setter or torque wrench per the machine tool manufacturer specifications when securing the drawbar. Inspect the taper shank and spindle bore for burrs or contamination before installation, as surface defects will degrade runout performance. Confirm coolant port alignment before initiating a coolant-through operation.