product description

Taper: BT30

Tie rod thread: M12-1.75

Collet Series: ER-40

Item (L): 3.14 inches

Balance: G2.5 20000

TIR: 0.0001

Chuck nut diameter: 2.48 inches

Features

20000 PRM when balancing to G2

In the standard standard ER collet nut, the inner ring is off center, so the ER collet can be easily

snapped in and the ER collet is held in place. To minimize this eccentricity, the ER collet

nut is optimized to distribute the flat side area to eccentricity.

Made of alloy steel, hardenable to 54-60 HRc

Tapered to an accuracy standard of AT3 or higher to maximize contact with the spindle.

All critical surfaces are precision ground

The concentricity from the taper to the end mill cavity is less than 0.0002"

Laboratory proof of taper accuracy and jitter measurement is included with each holder

Includes internal set screws that can be used as stop pins to prevent the end mill or drill from sliding backwards during heavy cutting

Coolant throughput by removing internal set screws