J23 series C frame inclinable pressing machines . This series of press adopts rotating key positive clutch , which has a simple structure and is convenient to operate and maintain , achieving smooth operation , low impact and low noise .J23-25open type inclinable press machine is the first to adpot rolling bearing rather than the commonly used sliding bearing (copper bearing ) for the transmission gear , making the transmission gear more wear-resistant and avoiding loud noises of gears caused by the quickly worn copper bearing . The 80T- level and above press machine all adopt the structure of pneumatic dual balance cyllinder , which has small fluctuation of the lathe unstable. And it can also avoid accidents caused by the falling of slider when the brake fails or the connecting rod ruptures .