Tormach PCNC 770 - Drawbar and TTS Collet; Spindle Belt

Chapter 9
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UM10350_PCNC770_Manual_0916A
Maintenance
• Extreme axis posions can expose the oil distribuon channels that are cut into the way
support saddle surfaces. If the pump is used in those posions, the hydraulic force of the oil
will not apply it throughout the mill as intended. Instead, the oil will simply squirt out at the
point where the oil channel is exposed.
• Aer a long period of inacvity (or in cold condions), the oil system may become clogged.
For more informaon, refer to Tormach service bullen Flushing the Lubricaon System.
9.1.5 Drawbar and TTS Collet
The drawbar, drawbar thrust washer and TTS collet are wear items and should be replaced regularly.
Proper lubricaon and maintenance of the drawbar and TTS collet will maximize tool holding force
and prolong the service life of these components.
• Clean tool holder shanks as needed with a degreaser
• Keep the inside of the collet clean and dry. Collets must be cleaned of preservave shipping
oil when rst received
• Lubricate outside of collet and inside of spindle taper with An-seize Grease (PN 31273). Use
sparingly to avoid risk of the lubricant migrang to the inside of the collet. Only the rst inch
of the spindle taper needs to be lubricated; remove excess lubricant with a degreaser
PN Description
31273 Anti-seize Grease
• Lubricate the threaded secon of the drawbar, the thrust shoulder of the drawbar, and the
thrust washer with An-seize Grease (PN 31273)
• Do not overghten the drawbar. The recommended drawbar torque is 30 -lbs. Exceeding 40
-lbs of torque will reduce the operaonal service of the collet and drawbar
• Visually inspect the drawbar, thrust washer, and collet for signs of wear such as damaged or
galled threads and replace as needed. It is recommended that the drawbar, thrust washer,
and collet be replaced as a set
9.2 Spindle Belt
Inspect the spindle belt as indicated in the maintenance schedule. Replace if necessary.
PN Description
30389 PCNC 1100 Replacement Spindle Belt
31435 PCNC 770 Replacement Spindle Belt