VMC2/2OP Spindle Bump Out Adjustment

Before you can determine if the spindle bump out needs to be adjusted you first must turn off the through spindle air. The through spindle air can feel like the tool is being bumped out without the drawbar making contact with the retention knob on the tool holder.

To check if the spindle bump out needs to be adjusted, put a tool holder in the spindle and clamp it. Using a mag base and a Dial Plunger Indicator, zero it on the shoulder of the tool holder.

Next hold the tool holder up into the spindle and press the clamp/unclamp button to unclamp the spindle and read the indicator. The difference from clamped to unclamped should be between 0.020" and 0.025". If it is outside of this range the bump out needs to be adjusted.

To adjust the bump out first remove the tool holder from the spindle.

Next unclamp the spindle and with a 4mm T-Handle loosen the set screw in the tool gripper in the spindle.

Once the set screw is loose, press the spindle unclamp button again and use a 5mm T-Handle to loosen or tighten the gripper so that there is a 0.020" to 0.025" bump out from spindle clamped to unclamped, then tighten the set screw. Recheck the Bump Out to make sure it didn't change when the set screw was tightened.

Once the Spindle Bump Out has been adjusted turn the through spindle air back on and reinstall the top panel to the spindle cover.