[daleman]

need help need to replace the bearings on our vf2 ss spindle motor have removed the motor need to know how haas have fixed the encoder gear and the main drive lug to the spindle .
and how best to remove them

thanks in advance

[Precision MT]

Daleman,

This is a very common repair to replace the motor shaft encoder pulley on top of the spindle motor.

Do you have a steel or an aluminum pulley?

Do you TSC (through spindle coolant)?

95% of the time in the field I have to cut the pulley off the shaft with a bare hacksaw blade. BE VERY CAREFUL NOT TO DAMAGE THE MOTOR SHAFT. If you ding the shaft it's ok, but make sure you clean in up good so it doesn't cause any runout on that pulley. Any pulley runout will cause spindle load fluctuation and RPM fluctuation. You'll know you did a good job if after it's back together the load doesn't move at 12,000RPM.

Don't forget to float that motor back in at 1000RPM before you tighten the bolts.

If you have TSC the rotary union runout NEEDS to be <0.0001" at the top of the union. If it's out, check the motor shaft flatness on the top surface, should not exceed 0.0002". If it does, get out the sandpaper and make it flat.

Thank you,

Phil

[Precision MT]

The drive motor coupling will come off with heat and a 20 ton hydraulic press. Make sure you measure the depth of the coupling before pressing it off.

Do you have a Yaskawa motor or a Haas motor? I have heard of issues rebuilding the Haas motors as they are difficult to source parts for.

Thank you,

Phil

[daleman]

Thanks for the info we ended up borrowing a induction heat kit popped the pulleys off and removed the motor bearings and replaced them with shiny new ones machine back up and running no problems so far ended up replacing the thru spindle coolant union as the original was well past its best .
Sounds like new now

[Machineit]

Very glad to hear you got it done! :cheers:

[bthomas7408]

What bearings did you use for replacements?