Effective Date: 09/25/08 Page 7 of 9
ATS Systems
Form
Subject: Ultimate Chuck Install & Training Checklist
Doc. No. FM 9-112
Rev.C
- At the start of each shift and after every 50 clamping cycles, actuate the chuck full stroke 5-10 times without
gripping a workpiece to internally redistribute grease throughout the chuck.
- Clean jaw guideways when changing jaws, or at least once per shift if no jaw change is required, and lightly coat
sliding jaw surfaces with KO5. (Demonstrate sweeping chips out of the guideway located at the 6:00 position.)
With the cylinder that is on this machine, (decide if comment "a" or "b" below is appropriate. Usually it's "a".
A "b" condition is rare.)
a. and with the maximum hydraulic pressure the machine has available, this chuck is operating at ___ % of it's
maximum rated grip force. Note that the Ultimate Chuck's maximum grip force is probably 1.2-1.5 times
that of a standard chuck and anything above 65% is typical. Also, to get the same static grip force as the
standard chuck you need to increase the pressure 30%. So if you have pressure settings recorded for jobs
you run on this machine, increase them by 30% up to the maximum. If you can't achieve the static grip
force you had before it's probably not a problem. What you need isn't static grip force when the chuck isn't
rotating, but remaining grip force when you are at cutting speed. Do the calculations for the jaws you are
using or use a grip force gauge and limit your speed to a 50% grip force loss.
b. the maximum hydraulic pressure the machine has available would give too much drawbar pull for this chuck and
the chuck would be damaged. Because of this I've noted on this tag that the pressure should never be set above
___ PSI. For most any application you shouldn't need more than 90% of that pressure.
Any questions?
Finally for some miscellaneous points.
- Never stand in line with a rotating chuck. Always stand off to one side so that if anything bad happens it's
less likely to hit you.
1.3.5 - I recommend you purchase a dynamic grip force gauge and inspect the grip force of the chuck weekly and
record it. If you note a decrease in grip force it's time to disassemble, clean and inspect the chuck. Under
normal operating conditions it's wise to clean the chuck every 1000- 1500 hours of operation.
So, for a quick review:
___ Avoid standing directly in line with a rotating chuck or workpiece.
___ Don't forget the hazard of using non standard large jaws and even full wide soft jaws. Resulting
centrifugal force may require RPM to be limited.
___ Use only grade 12.9 bolts in new condition for jaw mounting with a minimum of 1½ -2 times diameter
thread engagement.
__ Use only the special ATS hex key to change jaws or chuck will be damaged. Never take your hand off the
key. Never leave key in the chuck as it could fly out if spindle is rotated.
___ Increase hydraulic pressure 30% to achieve same static grip force as most standard chucks.
___ Always position the end of the base jaw inside the safe zone marked on the face of the chuck.
___ Set jaw adjustment to grip the part as close to the start of the jaw stroke as possible, especially when
chucking irregular castings, forgings, etc. As you chuck each part, observe that adequate jaw stroke
remains to grip the part.
To Next Page
Loading...