1. Remove the Y-Axis waycovers.
2. Lubricate the new ballscrew. Refer to Lubricant Table for Haas Machine Components. Use the values for "Linear Guide/Ballscrew".
3. Torque the fasteners. Refer to Ballscrew - Installation Tools and Torque Specifications and Haas Fastener Torque Specifications.
4. The machine may require spacers in the installation. Refer to Ballscrew Spacer - Installation.

• T-1451 Coupler Installation "Pacman" Tool
• T-1069 Bearing-Nut Wrench Tool
• T-1601 Collar-Nut Lock Tool
  

This procedure applies to the following service kits:

• 93-24-7147: BALLSCREW, 32-6-1054.1
• 93-24-9013: BALLSCREW, 32-6-993.6
• 93-24-0010A: BSCREW 32-10-1054-.625"
• 93-24-0019A: BSCREW 32-6-1210-.625" HW
• 93-24-0020A: BSCREW 32-6-854-.625" HW
• 93-24-0081A: BSCREW 32-10-1096-.625"
• 93-24-0082A: BSCREW 32-10-1553-.625"
• 93-24-0084A: BSCREW 32-20-1037-19
• 93-24-0094: BSCREW 32-6-1271-.625"
• 93-24-0103A: BSCREW 32-10-1633-.625"
• 93-24-0106A: BSCREW 32-6-1464-.625" HW
• 93-24-0131: BSCREW 32-10-1264.625”
• 93-24-9012A: BSCREW 32-6-1367-.625"
• 93-24-9013A: BSCREW 32-6-987-.625"
• 93-24-9306A: BSCREW 32-6-1634-.625"
• 93-24-9807A: BSCREW 32-6-1989-.625"
• 93-4590: BSCREW 32-10-1977-.625"
• 93-4591: BSCREW 32-20-1241-19

Jog the Y Axis away from the motor housing.

Push [POWER OFF].

Set the main circuit breaker to the OFF position.

Lock the main circuit breaker. Use an approved lock with an approved safety tag.

Remove the bracket-bumper assembly [1].

Note: The bracket-bumper assembly is different on some machines.

Disconnect the encoder and motor cables [2].

Record the position of the adapter [1] for the lubrication-fitting.

Remove the adapter for the lubrication-fitting.

Remove the (5) screws [2] from the ballnut.

Use your hand to turn the ballnut [3] counterclockwise.

Do this until the ballnut is 6" (15 cm) from the housing [4] for the support-bearing.

If necessary, remove the sheet-metal skirt and the air-lube panel to get access to the motor housing.

Install the coupler-installation tool [1] on the motor coupling.

Note: Turn the ballscrew so you can see the screw [4] for the motor-coupling clamp.

Remove the (4) motor screws [2].

Loosen the screw [4] on the motor-coupling clamp.

Remove the motor with the motor-coupling assembly.

Remove the ballscrew key [3].

Loosen the locknut screw [1] on the support-bearing.

Note: If necessary, push the table to get access to the locknut screw.

Install the collar-nut lock tool [2] on the motor-housing locknut.

Use the bearing-nut wrench tool [1].

Turn the support-bearing locknut [2] counterclockwise, until it is flush [3] with the shaft of the ballscrew.

Tighten the support-bearing lock nut screw [1].

Remove the collar-nut lock tool [2] from the motor housing.

Loosen the screw [1] on the locknut for the motor-bearing.

Install the collar-nut lock tool [2] on the support-bearing housing.

 Note: Make sure the collar-nut wrench goes into the support-bearing housing slot and into the slots on the locknut.

Use the bearing-nut wrench tool [4] to loosen the locknut [3].

Remove the locknut.

Remove the collar-nut lock tool [1].

Loosen the locknut screw [2] and remove the support-bearing locknut [3].

Put a wood block [4] between the ballnut housing and the motor house. The wood block supports the ballscrew when the bearing pack is removed.

Remove the bearing pack [5] from the motor housing.

Note: If necessary, hold the bearing pack and turn the ballscrew counterclockwise to remove the bearing pack.

If you can easily remove the support bearing [1], it is a slip-fit bearing. Go to Step 7.

If you can not easily remove the support bearing, do not remove it. You cannot remove a press-fit bearing.

Push the housing [2] for the ballnut in the direction of the housing [3] for the motor.

Push the ballscrew in the direction of the housing for the motor.

Remove the ballscrew [4] diagonally.

If the support bearing [1] is a slip-fit bearing, remove it.

Pull the ballscrew through the support-bearing housing.

Remove the ballscrew [2] diagonally.

If the support bearing is press-fit, go to step 2.

If the support bearing is slip-fit, turn the ballnut [1] until it is near the center of the ballscrew [2].

Install the ballscrew diagonally .

Push the ballscrew through the support-bearing housing [3].

Put the wave washer [5] onto the ballscrew shaft.

Install the slip-fit support bearing [4] onto the ballscrew shaft.

Push the ballscrew through the nut housing [6] and into the housing [7] for the motor.

If the support bearing is press-fit bearing, install the ballscrew [1] diagonally.

Push the ballscrew through the ballnut housing [2] and into the motor housing [3].

Pull the ballscrew into the press-fit bearing [4].

Put a wood block [5] near the motor housing. This helps support the ballscrew.

Clean the ballnut flange and mating face of the nut housing fully.

Install the motor-housing bearing pack [1].

Torque the screws for the bearing pack. Refer to Haas Fastener Torque Specifications. Use the values for steel.

Turn the ballnut [2] until the lubrication-fitting port [3] is very near to the position you recorded during removal.

Push the table until the ballnut goes into the ballnut housing [4].

Turn the ballnut slightly to align the screw holes. Attach the ballnut to the ballnut housing.

Use your fingers to tighten the screws.

Install the lube-fitting adapter [5].

Use your hand to to tighten the lubrication-fitting adapter [2].

Remove the wood block.

Install the locknut [3] for the support bearing.

Make sure the locknut is flush with the ballscrew [4].

Tighten the clamp screw [2] for the locknut.

Attach the lock tool [1] for the collar nut.

Install the locknut [5] for the motor bearing.

Use the wrench tool [7] for the bearing nut to torque the locknut [5] to 15 ft-lb (20 Nm).

Torque the screw [6] on the locknut. Refer to Ballscrew - Installation Tools and Torque Specifications.

Remove the lock tool [1] for the collar-nut from the support-bearing casting.

Loosen the clamp screw [2] on the locknut for the bearing support.

Install the lock tool [1] for the collar nut onto the locknut for the motor bearing.

Use the wrench [2] for the bearing nut to torque the locknut [3] for the support bearing to 4 in-lb (0.5 Nm).

Remove the collar-nut lock tool [1] from the motor-bearing housing.

Torque the screw [4] on the locknut. Refer to Ballscrew - Installation Tools and Torque Specifications.

Install the bracket-bumper assembly on the housing for the support bearing.

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Apply a thin layer of grease to the ballscrew key [1].

Install the ballscrew key.

Make sure the coupler-installation tool [2] is installed.

Install the motor [3] with the motor-coupling assembly [4] on the ballscrew shaft.

Torque the (4) motor screws. Refer to Haas Fastener Torque Specifications. Use the values for iron.

Remove the coupler-installation tool [2] from the motor coupling.

Make sure the slot in the motor-coupler [6] is not aligned with the slot [7] in the motor shaft.

Torque the screw [5] for the motor-coupling clamp. Refer to Ballscrew - Installation Tools and Torque Specifications.

Install the encoder cable [3] and the motor cable [3].

Push POWER ON.

Set Setting 53, Jog w/o Zero Return, to ON.

Jog the Y Axis in the positive (+) direction to the end of travel.

 Caution: Do not run the ballnut into the hard stop.

Push  [EMERGENCY STOP]

Torque the screws [1] that hold the ballnut. Refer to Haas Fastener Torque Specifications. Use the values for iron.

Release the  [EMERGENCY STOP]. Push [RESET] to stop the alarms.

Jog the Y Axis in the negative (-) direction to the end of travel.

Push  [EMERGENCY STOP]

Install the bracket-bumper assembly [2].

Use your hand to turn the ballscrew [1] in one direction. Turn the ballscrew until the table is at the end of travel.

Turn the ballscrew [1] the other direction until the table is at the end of travel.

If the ballscrew is correctly aligned to the ballnut housing [2], the ballscrew turns with constant tension.

If the tension changes while you turn the ballscrew, you must adjust the ballnut housing.

To adjust the ballnut housing, do these steps:

• Loosen the (8) screws [3] that hold the ballnut housing to the saddle assembly. For Minimill reboot machines, these screws are difficult to access. Remove the cover [4] and turn the ball screw so that the ballnut housing screws are accessible from underneath the base [5] as shown.

• Release the  [EMERGENCY STOP]. Push [RESET] to stop the alarms.

• Jog the table in the negative (-) to the end of travel.

• Jog the table in the positive (+) to the end of travel.

• Push [EMERGENCY STOP].

• Turn the ballscrew with your hand to make sure the table moves with constant tension. If the tension is not constant, go to step 4.
• If the tension is constant, incrementally torque the (8) screws that hold the ballnut housing to the saddle assembly in a star pattern. Refer to Haas Fastener Torque Specifications. Use the values for iron.
  

Again turn the ballscrew in each direction to the end of travel.

If the tension continues to change while you turn the ballscrew, do these steps:

Loosen the (4) screws [1] on the bearing support. Keep the screws sufficiently tight to control the adjustment.

Remove and discard the alignment pins [2].

Note: Alignment pins are used only in production to decrease assembly time. They do not keep the ballscrew aligned.

When the table moves with constant tension, torque the (4) screws in a star pattern. Refer to Haas Fastener Torque Specifications. Use the value for iron.

Do Step 3 again.

Set Setting 53 to OFF.