The heat sources of high-speed electric spindles can be mainly divided into the following parts: first, the spindle motor is built into the structure of the machine tool spindle, and the heat generated by the high-speed rotation of the motor is the main heat source inside its structure; second, the high-speed stirring of the motor rotor within the spindle housing causes the air in the cavity to heat up as well. The heat generated by these sources is mainly dissipated through the spindle housing and spindle, so a considerable portion of the heat generated by the motor is transferred to the bearings through the spindle, thus affecting the lifespan of the bearings and causing thermal expansion of the spindle, which affects processing accuracy; third, as the spindle speed increases, the heat generated by the friction of the spindle bearings also increases.

Spindle coolantis a type of coolant that has more advantages than traditional coolants—water. It has sensitive thermal balance capabilities, super strong thermal conductivity, ensuring the engine operates at a good working temperature; an ultra-wide working temperature range, preventing boiling and maintaining micro-pressure in the cooling system; no need to add antifreeze in low-temperature environments; it avoids corrosion damage from cavitation, scale, and electrolysis. It has good compatibility with rubber hoses. Its adaptability is broader, heating quickly at low temperatures, strong heat dissipation at high temperatures, improving thermal balance, reducing emissions, enhancing power corrosion resistance, saving fuel, adapting to complex and variable geographical climate conditions, extending service life, and reducing maintenance. It ensures the engine operates effectively at higher temperatures. At low temperatures, heat dissipation is slow, which can achieve rapid warm-up, and at high temperatures, it has good thermal conductivity. Moreover, the coolant has strong corrosion resistance and can be compatible with rubber piping, better protecting the cooling system. This type of product is better than antifreeze and does not damage the vehicle.

Spindle coolantEffects of the coolant:

(1) Ultra-wide working temperature: -60℃~184℃, ensuring the engine operates effectively at higher temperatures, solving the occurrence of cavitation and vapor blockage in the cooling system. When the cylinder is working, the heat is uneven; the top of the cylinder, affected by compressed gas, ignition, and exhaust, is prone to overheating peaks, causing frequent pre-ignition and knocking, resulting in power and fuel loss. The high boiling point of the coolant prevents the formation of vapor blockage layers, eliminates the "overheating peaks" in the cylinder, balances heat dissipation, and has super strong thermal balance capabilities, keeping the engine in good working condition.

(2) The coolant is designed with a motion viscosity that changes with temperature. Below 100℃ engine temperature, heat dissipation is slow, and this characteristic allows for rapid