Service Home How To Procedures VMC - 40-Taper - Inline Pin-Drive Spindle - Replacement - AD0318

VMC - 40-Taper - Inline Pin-Drive Spindle - Replacement - AD0318

9.1 40T - Inline Pin Drive Spindle - Replacement

Last updated: 01/05/2023

VMC - 40-Taper - Inline Pin-Drive Spindle - Replacement

AD0318

Applies to machines built from: June, 2016

Introduction

The following service video shows how to replace a 40T Inline Spindle.

  NOTE:  This  service video is for reference only and does not replace the written procedure. 

This procedure tells you how to replace a VMC - 40-Taper Inline Pin-Drive Spindle. For a DT/DM machine, refer to the DT/DM - Pin Drive - Spindle - Replacement - AD0650 procedure.

This Document Applies to the Following Service Kits:

  • 93-30-11972C SPINDLE, SVC, 40T INLINE 15K PIN DRIVE
  • 93-30-11972D SPINDLE 40T INLINE 15K PIN DRIVE SVC
  • 93-30-12298A SPINDLE 40T INLINE 8/10K PIN W/DB GREASE
  • 93-30-12298B SPINDLE 40T INLINE 8/10K PIN W/DB GREASE
  • 93-30-12504A SPINDLE 40T 8/10/12K VMC INLIN PIN SVC
  • 93-30-12504B SPINDLE 40T INLINE 8/10/12K PIN DRIVE SVC
  • 93-30-13432 SPINDLE 40T 8/10/12K VMC INLIN PIN SVC
  • 93-30-13432A SPINDLE 40T 8/10/12K PIN DRV SVC 
  • 93-30-13455 SPINDLE 40T 15K VMC INCLINE PIN SVC
  • 93-30-13455A SPINDLE 40T INLINE 15K PIN DRV W/DB SVC 
  • 93-30-13749 SPINDLE 40T INLINE 8/10K PIN W/DB GREASE
  • 93-30-14456 SPINDLE 40T INLIN 18K PIN DRIVE W/DB SVC

 Note: If you install the same spindle that you remove or a new spindle, record the location of the spindle shims. Install the spindle shims in the same location and then do the VMC - Spindle - Spindle Sweep procedure.

Machine Compatibility

Do this procedure on vertical mills that have a 40-taper inline pin-drive made after May, 2016

Spindle Removal

1

Remove the spindle head cover panels. 

2

Remove the front motor shroud panel.

3

Remove the front air scraper [1].

Disconnect the spindle lubrication tube.

Remove the 90° spindle lubrication fitting [2].

Install a 1/8" NPT plug [3] into the lubrication port. Install the plug [3] flush or below flush with the surface of the spindle.

4

Put an oil pan on the table to catch all oil leaks.

Loosen the (6) spindle screws [1] approximately (2) turns.

Install the protective cap [2] over the spindle nose.

 Caution: The protective cap is necessary. It prevents damage to the spindle when it touches the table in the next step.

Jog the Z Axis in the negative (-) direction until the spindle touches the table. If the spindle does not touch the table, put a wooden or aluminum block under the spindle.

Remove the (6) spindle screws [1].

Jog the Z Axis in the positive (+) direction until the spindle is fully out of the spindle head and be removed. 

Remove the shims [3].

Spindle Installation Preparation

1

Jog the Z Axis in the positive (+) direction to the top of travel.

Clean and stone the spindle flange [1] and the spindle head surface [2] where the spindle flange will touch.

2

Replace the transfer tube [1] if it is worn or damaged.

Apply a thin layer of lithium grease to these parts:

  • transfer tube [1]
  • transfer tube o-rings [2]
  • pin-coupler bushings [3]

Push the transfer tube [1] back into the spindle pin drive coupling.

Place the shims in the same location as the previous spindle.

Visually check that three bushings [3] are inside the spindle coupler. Make sure they are the same lengths and aren't damaged. 

Spindle Installation

1

Caution: The motor shaft may become misaligned if spindle installation is done incorrectly.

Before installing the spindle loosen the motor mounting bolts at least a half of an inch.

If the pins are misaligned with the coupler, the motor will visibly lift instead of transmitting all of the axis thrust force into the motor shaft and creates damage on the bearings.

2

Turn the spindle until the oil fitting port [1] points to the front right of the machine.

Slowly jog the Z Axis in the negative (-) direction over the spindle.

While you jog the Z Axis, use your hand to turn the spindle. If you feel a change in tension, stop immediately. Align the coupler pins to the bushings as closely as possible again.

 Caution: Incorrectly aligned couplers can cause damage to the bearings.

Slowly jog the Z axis in the negative (-) direction.

Make sure the couplers engage smoothly.

Make sure the spindle is centered in the spindle bore. Install (6) spindle screws [1]. Torque the screws. Refer to HAAS FASTENER TORQUE SPECIFICATIONS. 

3

Remove the 1/8" NPT plug [1] from the lubrication port.

Install the 90° spindle lubrication fitting [2].

Install the front air scraper [3].

Connect the spindle lubrication tube.

Perform the VMC - Spindle - Spindle Sweep procedure.

 NOTE: Do not add oil to the spindle casting, even if it had oil before.

4

To align motor to spindle:

Run spindle at 1000 RPM clockwise/forward for 30 seconds.

Run spindle at 1000 RPM counterclockwise/reverse for 30 seconds.

Run spindle at 1000 RPM clockwise/forward for 1 minute.

Snug mounting screws while motor is running.

Note: When motors stops it will jolt to the side and misalign if not snugged down.

Note: The Octavis Vibration Analyzer can be used when aligning motor to find where vibration displacement spike is the smallest.

Torque screws per Haas Torque Specifications.

Run the mill spindle vibration test per Mill - Spindle Vibration - Tolerances.

Testing

1

 Push [COOLANT] to start the TSC.

Correct operation is as follows:

  1. Coolant flows correctly from the TSC tool holder [1].
  2. A few drops flow from the vacuum-generator hose [2].

Push [RESET].

Make sure there are no leaks in the air hoses and coolant hoses.