VM Series Maintenance and Safety Manual 704-0212-209 Machine Maintenance 3- 13
Spindle
Most Hurco machines come equipped with a non-motorized spindle.
Air blows from the spindle taper hole when the spindle is unclamped. Any moisture in the
air system will be detrimental to the taper, especially when the machine is stopped for an
extended time.
Daily: Lubricate the non-motorized spindle taper, and wipe it clean with a lint-free cloth
dipped in clean, light oil. If the machine will be idle, wrap the spindle taper in a cloth
soaked with clean Autolube oil.
Spindle Chiller
The spindle chiller maintains spindle temperature by circulating liquid around the spindle
cartridge. Chilling the spindle reduces thermal growth, which improves machining
accuracy. If the chiller liquid level in the tank is not maintained at or above the low mark,
the system pump could be damaged and spindle cooling impaired.
The spindle chiller has two operating modes: Differential and Fixed.
• In Differential mode, the chiller operates when the difference between the
ambient air and liquid temperatures exceeds the setting on the temperature
display.
• In Fixed mode, the chiller operates when the temperature of the liquid
exceeds a fixed temperature as shown on the temperature display.
Maintain Spindle Chiller Solution
Weekly: Inspect the chiller solution level (if equipped), and if necessary, add solution to
the unit.
Follow these steps:
1. Check the solution level through the sight gauge on the chiller tank.
2. If the level is low, add the recommended chiller solution to the tank. Refer to
Table 3–1.Lubrication, on page 3 - 5 for appropriate lubrication. Do not overfill
the tank.
Use a fully synthetic water miscible corrosion-protection concentrate
for spindle cooling systems to protect against corrosion. The additive
should not contain any glycols, which can be harmful to galvanized
parts.
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