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Measuring pullstud gripper clamping force??

pwsaragih

Plastic
Joined
Feb 4, 2021
Does anyone knows how to measure pullstud gripper clamping force? And the standard clamping force for BT50 spindle.

I had 2 identical toyoda FH630SX with BT50 spindle. Both producing the same product with exact same tools.

The second on was having unstable results on fine boring.

I have suspicion on pullstud gripper clamping force, since it has tendencies to dent pullstuds more than the other.
Already checked the spindle with test bar and got just 0.004mm of runout, it shouldn't be the tapper.
I was also try swapping all the tools between both machines and got the same results, the second machine still unstable.

If anyone having another opinion in this case feel free to convey.

Thankyou anyone:)
 
You'd need something like this to measure the clamp force of the drawbar directly.
ForceCheck Drawbar Clamping Force Gauges

The machine tool service department should have them for use by their technicians, have you spoken to the local Toyoda office? Might be cheaper to just have them come in and check it, among other checks they can do between the 2 machines. They will also know what the spec is for the force on those machines.
 








 
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