Tormach PCNC 440 - 4.5.2 Change TTS Tool Holder; 4.5.3 Tips on Using TTS

Chapter 4
41
UM10372_PCNC440_Manual_0221A
OPERATiON
4.5.2 Change TTS Tool Holder
1. Loosen the drawbar by one turn with a 13 mm wrench.
2. Grasp the tool holder in one hand and use a mallet to gently strike the top of the drawbar.
3. Remove the tool holder.
4. Using one hand, insert the TTS collet into the boom of the spindle.
5. Twist the collet while applying light upward pressure unl the collet groove aligns with the
spindle alignment pin; the collet is pushed completely inside the spindle taper.
6. Using your other hand, insert the drawbar into the drawbar bushing installed in Step 6; rotate
the drawbar to engage several threads in the TTS collet.
7. Place and hold a TTS tool holder inside the TTS collet and against the spindle nose. Using a
13 mm wrench, rotate the drawbar and ghten the collet against the TTS tool holder.
4.5.3 Tips on Using TTS
• Never ghten the TTS collet without a tool holder inserted
• Never change tools while a tool holder is in the spindle as this may damage the spindle
alignment pin
• To minimize tool pull-out, periodically wipe tool holder shanks clean and dry with a degreasing
agent
• When not in use, apply a protecve spray (WD-40
®
or similar) to prevent surface rust on bare
metal surfaces of tool holders
• The drawbar, drawbar bushing, and TTS collet are wear items. Inspect threads and mang
surfaces regularly and replace if damage or wear is apparent as it reduces the ability to ghten
tools properly
R8 collets and R8 taper tool holders are also compable. These are installed in a similar manner to
the TTS collet as described above, but must be removed completely during each tool change.
NOTE: The PCNC 440 ships with a drawbar with 7/16”-20 UNF thread.