Parlec B40-25ERP412 ER25 Collet Chuck BT40 Taper Shank

Product Description

The PARLEC B40-25ERP412 is an ER25 collet chuck designed for CNC machining centers using BT40 taper spindles. It accepts ER25 collets with a clamping range of 1 mm to 16 mm (0.0394 to 0.6299 inches), making it suitable for a wide variety of end mills, drills, and reamers. The chuck features a 4.12-inch projection from the spindle face and delivers a total indicator runout (TIR) of 0.0002 inches, supporting tight-tolerance work. Through-spindle coolant capability allows coolant delivery directly to the cutting zone. Actuation is by wrench. Weighing 3.65 pounds, it is balanced to 25,000 RPM for high-speed machining applications.

The B40-25ERP412 is intended for use in vertical and horizontal machining centers equipped with BT40 spindle interfaces. It suits production environments where both precision and coolant-through toolholding are required. Typical applications include finish milling, drilling, and reaming operations in aerospace, automotive, and general metalworking shops. The ER25 collet system provides broad tooling availability and quick changeover, making this chuck a practical choice for shops running high-mix or high-volume programs.

Key Features

• ER25 collet system with 1 mm to 16 mm clamping range
• BT40 taper shank for direct spindle mounting
• 4.12-inch projection for extended reach to the cutting zone
• TIR of 0.0002 inches for precision tolerancing
• Through-spindle coolant delivery to the tool tip
• Balanced to 25,000 RPM for high-speed CNC use

Compatibility

Designed as an OEM-style toolholder for CNC machining centers with BT40 taper spindles accepting ER25 collets.

Installation Notes

Installation and removal should be performed by a qualified machinist or CNC setup technician. Confirm the spindle is fully stopped and the machine is in a safe state before mounting or removing the chuck. Use the correct spanner wrench for collet nut torque; do not use impact tools on the collet nut. Inspect the taper shank and spindle bore for chips or damage before seating the toolholder.