wrote in message
...
This post is related to the air closer post. Now that the air closer
project is started I realized that I need to figure out how much air
pressure to use. I could do this empirically but this approach may
show that my air closer isn't up to the job. After I have gone
through
the the whole process of adapting it to the lathe in question. The
max
air pressure I can use is 150 PSI which is dictated by the rotary
union. So, how would I measure the clamping pressure the collet puts
on the part? In production the part is clamped in the collet .050
from
the collet face. The dead length stop controls this distance. But I
think I can remove the stop and grip on something that is about .500
long and still get a good idea of the clamping capabilities of my
air
closer. I have the gauges but I'm not sure what would be best to
squeeze on.
Thanks,
Eric

How about locking the spindle and measuring the torque when the part
starts to rotate?