boring chuck

基本解释

PLK Precision Machinery to provide precision milling chuck handle, high-speed precision machine tool holders, precision boring devices and CNC milling arbor series cars.
PLK 精密機械提供精密銑刀夾頭柄，高速機精密刀柄，精密鏜孔器及CNC車銑刀刀杆系列。
plktools.com
The axial flotation of chuck plays an important role in the protection of rod pipe threads and prevention of rod pipe stripping or cutterhead from dropping during the process of raise boring.
在天井鑽進過程中，卡磐的軸曏浮動對保護鑽杆螺紋和防止鑽杆脫釦、刀頭墜落等方麪具有重要作用。