Cooler motor parts guide
Every part of an air cooler motor, with the names the trade uses for it in English and Hindi, and what it does.
Parts of a cooler motor
- Statorfield, फील्ड
- The fixed part of the motor: a pack of stampings with the winding laid in its slots. H-Frame and E-Frame stators have 36 slots, 110 Dia has 24.
- Stampinglamination, patti, पत्ती
- Thin electrical-steel sheets punched to shape and stacked to make the stator and rotor core. Sold as CRCA or the better CRNO (Hi-Perm) grade.
- Stack sizesize, 32 mm, 38 mm
- The height of the stamping pack. This is the mm number in a motor's name. More stack means more torque for a larger fan blade.
- Windingcoil, वाइंडिंग
- Insulated wire wound into the stator slots: a main winding, an auxiliary (starting) winding and tapped speed coils. Made in aluminium or copper.
- Rotorरोटर
- The rotating part. Cooler motors use a pressure die-cast aluminium squirrel-cage rotor pressed on the shaft.
- Shaftशाफ़्ट, shaft rod
- The steel rod through the rotor that carries the fan blade. Its diameter must match the blade's bore, commonly half an inch (12.7 mm).
- Bushbush bearing, बुश
- A self-lubricating sleeve the shaft runs in. Quiet and economical; used on 110 Dia, 100 Dia and 89 Dia motors with light blades.
- Ball bearingbearing, बेयरिंग
- Sealed bearings that carry heavier blades and long hours. Used on E-Frame, H-Frame and exhaust motors.
- Kuppacuppa, cup mount, कुप्पा
- The cup-shaped mounting on a 110 Dia motor that seats in the cooler body. The same motor comes with plain bush mount or kuppa.
- End shieldend cover, dhakkan, ढक्कन
- The aluminium disc at each end of the motor that holds the bearing or bush and centres the rotor. See our end shields page.
- Shellbody, frame, बॉडी
- The outer casing. A rolled mild-steel shell on standard H-Frame motors, or a finned aluminium body on the 44 mm model.
- Capacitorcondenser, कंडेंसर
- The running capacitor connected to the auxiliary winding. Typically 8 µF on H-Frame and 4 µF on 110 Dia motors.
- Fan bladepankha, पंखा, cooler fan
- The blade fixed on the shaft. Its diameter, pitch and material decide the load on the motor. See the fan blade guide.
- 3-speedspeed winding, regulator
- Tapped coils give high, medium and low speed through the cooler's switch. Our lead colours: blue common, black high, white medium, red low.
- Lead wirecable, तार
- The 4-core supply lead and 2-core capacitor lead coming out of the motor.
- Varnishवार्निश
- Insulating varnish that the wound stator is dipped in and baked, to bind the coils and keep out moisture.
Identify a motor by its body
| Body diameter | Motor family | Mount |
|---|---|---|
| 89 mm | 89 Dia Bachcha motor | Bush |
| 100 mm | 100 Dia | Bush |
| 110 mm | 110 Dia, Tower Motor | Bush / kuppa |
| 120.4 mm stamping | E-Frame | Bearing |
| 139 mm stamping | H-Frame, aluminium body, blue | Bearing |
Other cooler parts buyers ask about
An air cooler also needs parts that are not part of the motor. We do not manufacture these, but they are bought alongside it:
For motor components we do supply, see spare parts and end shields.
Guide questions
What are the main parts of a cooler motor?
Stator with winding, rotor with shaft, two end shields carrying a bush or bearing, the shell or body, a running capacitor and the lead wire.
Which parts of an air cooler does NEXPOWER make?
The motor and its components: end shields, shafts, rotors, shells, wound stators and stampings. Fan blades, water pumps, cooling pads, grills and cooler bodies are made by other manufacturers.
How do I know which cooler motor I have?
Measure the body diameter (89, 100, 110, about 120 or 139 mm), check whether it has a bush or bearing, and measure the stack height. A photo with a measuring tape is usually enough for us to identify it.