A 85mm piston lasts for 10 years, if it is leaking out of the air- ailled part of the piston, it lasts up to 10 years. If a hot 85mm piston is stored for a longer period of time, it lasts up to 10 years. If the 85mm piston is stored longer in the cylinderind, it can also last for more than 10 years. A 85mm piston can last for more than 10 years, depending on the type of piston.
For the replacement of dies, the piston can last for much longer than the classic 85mm piston. The lifespan of the 85mm piston is usually less to 10, depending on the usage of the piston.