TEN REASONS TO USE A CHILLER:
1. Part-to-part repeatability, parts won't pass gauge test or won't meet tolerance requirements
2. Part too hot to handle for operation.
3. Extended tool and grinding wheel life.
4. Control rapid coolant breakdown, misting and/or fire
5. Keep from having parts scrapped during start-up or during later shifts because they are out of spec.
6. Thermal expansion can cause a significant dimensional change when parts are produced to a very high tolerance(e.g., =/- .0001").
7. Production environment lacks adequate coolant temperature control which can result in a gradual rise during production run.
8. A stabilized coolant temperature has an important function in maintaining the dimensional accuracy of the work piece.
9. Reduced coolant evaporation, bacteria growth, and coolant misting into plant atmosphere.
10. Minimal operating costs associated with closed loop system chillers.
IMPORTANT FACTORS TO BE CONSIDERED:
2. Minimum and maximum ambient temperature
3. Maximum temperature of metalworking fluid if it will have direct contact with the spindle housing
4. Total cooling load (consider all sources of heat)
5. Heating load (is heating required)
6. Flow & pressure requirements for spindle cooling fluid
7. Temperature sensor location
8. Operating temperature & required temperature stability ( /-)
9. Cooling fluid to be used (water/glycol or oil)
10. Viscosity of cooling fluid (SSU or CST)
11. Electrical Requirements
12. Spindle operating cycle - idle vs. at-speed operating time
13. Source of Cooling – Plant chilled water loop, radiator-type cooler, chiller, etc
14. Type of condenser if a chiller is required – Water-Cooled or Air-Cooled
15. Spindle Protection – Loss of cooling flow and/ or over-temperature