JH21 series open back press machine (with dry clutch and hydraulic overload protector) Dry pneumatic friction, hydraulic safety device Welded body with steel plate and high intensity Main motor is made by Siemens Adopts combined pneumatic friction clutch and brake Cluster gear adopts the flooding oil lubrication Six-face rectangle lengthen guide, JH21-315B/400B adopts eight-face lengthen guideway Equipped with hydraulic overload protecting device
