RANMEI High-Precision Collet ER11/16/20/25/32/40-A/M/ UM Clamping-Nut Milling-Chuck Cap

Features: brand new and high quality Made of high-quality materials durable High-precision chuck ER 11/16/20/25/32/40 A/M/UM clamping nut milling cutter chuck. Industrial-grade high-end professional ER lock nuts. Made of high-quality chromium molybdenum steel (20CrMoTi). Strong clamping force not easy to deform. Reduce vibration and noise. Suitable for all kinds of ER tool holders (BT-ER. NT-ER MTA-ER MTB-ER R8-ER and ER straight extension shank). Product parameters: Type: clamping nut High precision: 0.005mm beating Material: Chrome Molybdenum Steel (20CrMoTi) Surface hardening: HRC 52-55 Inner taper accuracy grade: 4H Suitable for spindle speed: