Our BT40 ER Collet Chucks have a 5 micron run out accuracy & AT3 class taper.
Balanced Holder G6.3 with 15,000 RPM

Features:
AT3 class accuracy
Made from carburized alloy steel with case hardening and quench hardening heat,work surface hardnsll to HRC 53-57
“Taper accuracy AT3,ensure well contact with spindle cone for high speed running to protect the
spindle.”
All parts are precision fully ground for accurate fit
Offer more rigidity and better accuracy
Concentricity and runout accuracy =0.005mm in high rpm.
D D1 L1
25 42 70 mm