The OTC 4104 is a single-acting, spring-return ram has a capacity of 10 tons and a maximum working pressure up to 10,000 PSI; 2 to 1 safety factor on material yield; designed and tested to meet ANSI B30.1. Standard stroke length of 6-1/8", this compact ram requires a minimum of mounting space. The ram features a threaded ram collar and threaded piston rod end. OTC's design ensures positive, leak-resistant sealing throughout all pressure ranges, yet full piston return characteristics are maintained. Additional bearing surface has been designed into this unit, to effectively resist the punishing stress exerted by off-center loads.