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 Spider-Drive Spindle. For a DT/DM machine, refer to the DT/DM - Spider Coupling Drive - Spindle – Replacement -AD0651 procedure.

This Document Applies to the Following Service Kits:

• 93-30-12005B SPINDLE 40T INLINE 12/15K VMC W/DB
• 93-30-12005C SPINDLE 40T INLINE 12/15K VMC W/DB
• 93-30-12008B SPINDLE 40T INLINE 8/10K VMC W/DB
• 93-30-4018E SPINDLE 40T INLINE 12K 2ND GEN VMC

 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.

 Note: If the machine was made between 10/2013 and 2/2016 you must replace the transfer tube.

Remove the spindle head cover panels. 

Remove the front motor shroud panel.

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 oil fitting port on the spindle. Install the plug [3] flush or below flush with the surface of the spindle.

Loosen the (4) bolts that attach the motor to the mounting plate. Do not remove the bolts.

Put an oil pan [3] 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.

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

Remove the shims [1].

Remove these parts:

• the spider coupling [2]
• the transfer tube [3]
• the o-rings [4]

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.

Use the correct transfer tube for your machine.

• 40-Taper; 8K/10K/12K RPM; inline spindle; use 20-6935: SPINDLE TRANSFER TUBE INLINE 12K
• 40-Taper; 15K RPM; inline spindle: use 20-6927: SPINDLE TRANSFER TUBE INLINE 15K RPM

Apply a thin layer of lithium grease to these parts:

• spider coupling [1]
• transfer tube [2]
• o-rings [3]

Install the transfer tube into the spindle.

Install the spider coupling.

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

 Caution: Bearing damage will occur if ANY load is placed on the motor shaft or couplings are not aligned during installation.

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.

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

Make sure the spindle coupler and the motor coupler align with the spider coupler [1].

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 [2]. Torque the screws. Refer to HAAS FASTENER TORQUE SPECIFICATIONS. 

Remove the 1/8" NPT plug [1] from the oil fitting port on the spindle.

Install the 90° spindle lubrication fitting [2].

Install the front air scraper [3].

Connect the spindle lubrication tube.

Do the VMC - Spindle - Spindle Sweep procedure.

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

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.

 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.