CNC Chiller: Passive Cooling or Refrigeration? How to Choose

Not every CNC machine requires a refrigeration chiller. Some applications can be cooled through passive heat dissipation, while others need active refrigeration to maintain the required water temperature. The choice depends mainly on the equipment's heat load and cooling requirements.

Passive Cooling vs. Refrigeration
A passive cooling chiller, such as TEYU CW-3000, dissipates heat from circulating water through heat exchange with ambient air. With a heat dissipation capacity of 50 W/°C, it is suitable for certain light-duty CNC applications that do not require active water temperature control.
A refrigeration chiller, such as TEYU CW-5000, uses a compressor-based system to actively cool the water. It can cool water below ambient temperature and maintain a set temperature within its operating range, making it suitable for equipment with more demanding cooling requirements.

Which CNC Chiller Should You Choose?
For certain CNC spindles around 1–3 kW, the CW-3000 may be suitable when passive heat dissipation is sufficient. For applications requiring active refrigeration, the CW-5000 offers 750 W of cooling capacity with ±0.3°C temperature stability, while the CW-5200 provides 1430 W with ±0.3°C stability for certain spindles around 7–15 kW.
For higher cooling demands, TEYU also offers models ranging from the CW-5300 to the CW-8000, with cooling capacities from 2400 W to 45 kW and temperature stability from ±0.5°C to ±1°C, depending on the model.
These spindle power ranges are indicative rather than fixed selection limits. The appropriate chiller depends on the actual heat load, required water temperature, water flow, pump pressure, and operating conditions. Spindle power alone does not determine the required cooling capacity.
TEYU offers industrial chillers for CNC applications, including passive cooling and compressor-based refrigeration models. The right choice depends on the specific cooling requirements of the equipment.