(一)、Precision water coolers for high-speed spindles：

(1)、Temperature of the body of water：Spindle cooling water temperature should be controlled at about 25°C；
(2)、Water pressure：Spindle cooling requires a water supply pressure of about 0.2 MPa.；
(3)、Calculation of heating power of electric spindle： P heat = P motor·η Pheat up ――Spindle heat generation kW PMotor - spindle drive motor power kW η ――Spindle heat loss efficiency For high speed spindles the heat loss η = 30% can be calculated.（Generally, the value of η=30% for domestic spindles and η=25% for Taiwan spindles，Values for German, Swiss and Japanese motorised spindlesη=20%）。
typical example：The power of the spindle motor of a machine tool is11kW，Maximum speed30000rpm，
Try to estimate the heat generation of machine tool spindle： Pheat up=11x30%=3.3 kW
MCW-35Cat water temperature25℃，environmental temperature30℃ The cooling capacity at the time of3.8kw，Greater than spindle heating power3.3KW，Fully meets the requirements for use；At a water supply pressure of0.2MPasurname Shi，flow rate23L/min。

(二)、Precision water cooler for low-speed walking wire EDM wire cutting machine：

(1)、Calculation of heating power based on installed power： P heat = η - P loaded electricity
P-heat ――calorific value kW
electrical installation――installed power kW
η――Heat loss efficiency

For general low-speed wire EDM wire cutting machines take theη≈20%。

(2)、Extrapolation of the heating power from the rate of increase of water temperature in the working tank

P heat= CP ·m·ΔT/t
P heat - heating power KW
1 kW =860 kcal/h
1 kcal/h =1.16x10-3 KW
CP ———constant-pressure specific heat capacity KJ/Kg·℃
Constant pressure specific heat capacity of water 4.18 KJ/Kg·℃
m——Total volume of water in the tank kg
ΔT——Temperature rise per unit time ℃
T(t)——times S
typical example：The total volume of water in the working fluid tank of a low-speed EDM wire cutting machine is as follows400kg，Water temperature rose from 25°C to 29°C in 40 minutes during normal operation。

Chillers are selected as follows： P heat= 4.18×400×(29-25)/(40×60)=2.79 kW The cooling capacity of precision water coolers should be greater than 20 per cent of the heat generated，MCW-35A or MCW-35B water cooler can be used。

2、Connection schematic：

Classifier for sums of money：

1、Precision water coolers when connected to equipment，It is recommended that a filter be added to the water system，See above for mounting location details。

2、Precision water coolers should be used in well ventilated，No dust and corrosive gases，A place free of debris around the equipment。