Determine clamping force

[Neil101]

Hey fellas,

How can I use this chart to determine the psi to clamp a 6" stock?

 

[Scruffy887]

Tape it to the headstock?

 

[Orange Vise]

I believe that's Haas' chart and the diameters correspond to chuck size, not stock size.

 

[Neil101]

Tape it to the headstock?

"Oh, great idea Einstein!

 

[Neil101]

I believe that's Haas' chart and the diameters correspond to chuck size, not stock size.

Thanks

 

[sinha]

As the chart indicates, the gripping force reduces at higher RPMs.
I have not seen but heard about chucks which compensate for centrifugal effects.

 

[guythatbrews]

Since the stock diameter is not shown nor mentioned, the implication is clamping force is independent of stock diameter.

This cant be, unless this is a counter-centrifugal chuck like sinha mentions. For a conventional chuck the dynamic clamping force decreases as the clamping diameter increases.

Maybe there are footnotes to this graph explaining this. Why is the clamping force important Neil101? I never worry about it, at least as far as an actual number is concerned.

Maybe the only way to know a number is to get one of these.

Buy Chuck Jaw Force Sensor Gauge, Wireless ForceCheck - CNC Specialty Store

The ForceCheck chuck force measurement utilizes a wireless unit to test holding force on turning centers, chucks, or lathes. Buy at CNC Specialty Store

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