J23 series presses belong to safety open tile presses with simple structure, easy operation and reliable performance. The JC23-6.3、J23-10B、J23-16、J23-25A、JG23-35A、JG23-40A、JC23-63A、J23-80A series products adopt steel key-rotary clutch, embodying convenient using and maintenance. Of which, all marked with letter “A” are safety presses that are equipped with emergency brake gears, which can make slide block scram within 0°—135°range and can configure photoelectric protective devices. J23-100B and J23-125 are adopted the cast iron bodies with vertical crankshaft and adjustable eccentric sleeve structure stroke; the pneumatic friction clutch works steadily with little hit strength, which can let slide block stop at any place. The JD23-80A is adopted the double-key structure.