Tormach PCNC 440 - Advanced Maintenance

Chapter 9
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UM10372_PCNC440_Manual_0221A
MAiNTENANCE
9.1.5 Drawbar and TTS Collet
The drawbar, drawbar bushing, and TTS collet are wear items and should be replaced regularly.
Proper lubricaon and maintenance of the drawbar, drawbar bushing, 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
• Ensure inside of collet is clean and dry; remove 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 An-seize Grease
• Lubricate the threaded secon of the drawbar, the thrust shoulder of the drawbar, and the
drawbar bushing with An-seize Grease (PN 31273)
• Do not overghten the drawbar; the recommended drawbar torque is 30 -lbs, and exceeding
40 -lbs of torque will reduce the operaonal service of the collet and drawbar
• Visually inspect the drawbar, drawbar bushing, and collet for signs of wear such as damaged
or galled threads and replace as needed; it is recommended that these be replaced as a set
9.2 Spindle Belt
Inspect the spindle belt as indicated in the maintenance schedule. Replace if necessary.
PN Description
35799 PCNC 440 Spindle Belt
9.3 Advanced Maintenance
9.3.1 Overview
Each PCNC 440 is tuned at the factory to meet or exceed certain precision metrics. These metrics
are indicated on the Cercate of Inspecon included with each mill, along with the actual values
measured for each metric as part of Tormach’s Quality Assurance program. The following advanced
maintenance procedures may become necessary over the ownership lifeme to maintain the
original factory precision:
• Gib adjustment
• Angular contact bearing preload adjustment
• Geometry adjustment (tram)