OrangeA BT40-ER20 COLLET CHUCKS W. Gage Length 70mm/2.76" Balanced to G6.3/15000RPM Tool Holder Set Mill Holder Fit for CNC Chucks or Holders for Drilling and Milling Machines(4PCs BT40-ER20-70)

Description

Color:4PCs BT40-ER20-70 BT40-ER20-70mm COLLET CHUCKS W. Gage Length 70mm/2.76" Product Description This machine is made of superior alloy steel, body and nut select Forging Parts, high precision and long life. Hardened to HRC 56-60. Cryogenic treatment. It is dynamically balanced to 20,000RPM at G2.5 by Haimer balancing machine at all location for consistent balance. Feature Alloy steel hardened to 50-52 rc Critical surfaces precision ground Works on all BT40 machines Collet chuck accepts all ER20 collets Coolant flows through tool holder 70mm Gage Length, Hex Nut (included) Balanced to 25,000 RPM at G2.5 0.0001" runout from taper to pocket Taper ground to AT3 standard Specifications Taper: BT40 Collet Series: ER20 Gage Length: 2.75"/70mm Max speed: G2.5@20000RPM Material: Steel Finish: Black Oxide Material: Hardened Alloy Steel Rear Thread: M16X2 Concentricity/runout less than: 0.0001"/0.003mm