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It depends on the size of the ball socket (the size of the finished ball) and the density of the material.
65Mn (10-12 months); 9Cr2Mo (1.5-2 years); Stainless steel (3-4 years)
A. For these small type briquette machines, this is a choice acceptable.
A. You can learn from our News for the applications and find your machine, or contact us for helping you find the most suitable briquette machine.