Z-Axis Ballscrew Replacement

Parts List Reference Files Tools Required Torque Chart
Note: Most common screw sizes shown. Always consult manufacturers recommendations.
Screw Size Grade Torque Specs Range
M5 12.9 7.7-10.3 N-m
M6 12.9 13.1-17.6 N-m
M8 12.9 32.1-42.6 N-m
M10 12.9 64-84 N-m
M12 12.9 110-146 N-m
M16 12.9 274-365 N-m
M20 12.9 534-712 N-m
M24 12.9 923-1231 N-m
Tools Required
1. Set of Metric Allen Wrenches
2. Set of Metric Open End Wrenches
3. Set of Metric Sockets
4. Ratchet and Extensions
5. Torque Wrench
6. Lift Assist Device
7. Depth Gauge
8. Lubricating Oil
9. Isopropyl Alcohol
10. Lint Free Rag
11. Fine Stone

Step 1: ECPL

Step 2: Open Work Area Safety Door

Step 3: Open Concertina Cover

Step 4:Refer to Z-Axis Motor Replacement

Refer to steps 1-4 of the Z-Axis Motor Replacement procedure for instructions on removing the motor.

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Step 5: Remove Frontal Lubrication Line

Step 6: Open Rear Maintenance Door

Step 7: Remove Rear Lubrication Line

Step 8: Remove Socket Head Screws

Step 9: Remove Ball Nut Screws

Step 10: Insert Jack Screws into Head Cap

Step 11: Remove Ball Screw Assembly

Step 12: Remove / Install New Needle Bearing

Step 13: Measure Coupling

Step 14:Lubricate Bearing

Step 15: Install Bearing

Step 16: Install Locknut / Coupling

Step 17: Install Inner Race

Step 18: Install Insert

Step 19: Clean Bearing Mounting Surface

Step 20: Clean Ballnut Mounting Surface

Step 21: Insert Ballscrew Assembly into Machine

Step 22: Insert Socket Screw and Torque

Step 23: Insert Ball Nut Screws and Torque

Step 24: Install Frontal Lubrication Line

Step 25: Install Rear Lubrication Line

Step 26: Close Rear Maintenance Door

Step 27:Refer to Z-Axis Motor Replacement

Refer to steps 1-4 of the Z-Axis Motor Replacement procedure for instructions on removing the motor.

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Step 28: Close and Secure Concertina Cover

Step 29: Close Work Area Safety Door

Step 30: ECPL

Step 31: Activate Lubrication and Run-in

Activate the Lubrication Cycle several times via the HMI - Prepare - Pwr-up Cond. HMI screen. After the lubrication cycles have been completed, it is now necessary to run-in the ballscrew. This can be accomplished by moving the axis back and forth along the entire length of travel at half rapid speed for 30 minutes.

Then allow the ballscrew to cool for 45 minutes.

Once completed, the ballscrew can now be fully loaded.