Colombo USA

Technical Guide – Cooling

Cooling is an essential part of the designing process of the electrical part (stator). It strongly affects on the spindle performances and duration.

Thanks to the long experience and the tests done on the field, GC spindles are offered in the widest cooling range types available on the market.

RA – Liquid cooling
The spindle is connected with a chiller that maintains the correct constant coolant temperature.
The flow and the pressure of the coolant (water + glicole) change dependently by the spindle housing cooling circuit dimensions and spindle power.

RC – Compressed air cooling
The spindle is connected with a compressor that provides the sufficient air flow to hold the motor at the right temperature.
The air flow and pressure (dry compressed air) change dependently by the spindle housing cooling circuit dimensions and spindle power.

RS- Cooling by powered fan
The spindle is equipped with a powered fan (V230 or V24) that provides the required air volume to hold the motor at the correct temperature.

RV – Fan cooling
The spindle is equipped with a fan directly mounted on the shaft. When the spindle runs the fan, thanks to an apposite room on the back of the housing, provide the correct air amount for the cooling.

Notes:
1. Maintain normal operating TEMPERATURE between 100 and 140 degrees Fahrenheit, measured on the front bearing support.
Maintaining this temperature range will help maximize spindle bearing life and avoid premature bearing failure.2. Spindle bearing will sound noisy during warm-up to 100 degrees Fahrenheit until thermal expansion reaches required preload.