BMC Lightweight Ball Bearing Fan Motor
The YSK series is a lightweight fan motor encapsulated in BMC (bulk moulding compound) with an all-ball bearing structure. Two tables list the models for 110-120 V and for 220-240 V supplies.
- Housing
- BMC encapsulation
- Bearings
- All-ball bearing structure
- Insulation
- Class B, S1 continuous
- MOQ
- From 100 pieces, depending on model
YSK models for 110-120 V supply
All 110-120 V models are rated at 60 Hz. Each row gives rated power, input power, the fan blade code, rated speed, temperature rise, outline dimension A, net weight and air volume.
| Model | Rated voltage (V) | Frequency (Hz) | Rated power (W) | Input power (W) | Fan blade (mm) | Rated speed (r/min) | Temperature rise (K) | A (mm) | Net weight (kg) | Air volume (m³/h) |
|---|---|---|---|---|---|---|---|---|---|---|
| YSK5-4 | 110-120 | 60 | 5 | 26 | L200/28 | 1500 | ≤50 | 37.5 | 0.64 | 300 |
| YSK6-4 | 110-120 | 60 | 6 | 30 | L200/34 | 1500 | ≤50 | 37.5 | 0.67 | 500 |
| YSK7-4 | 110-120 | 60 | 7 | 34 | L230/28 | 1500 | ≤50 | 37.5 | 0.7 | 550 |
| YSK8-4 | 110-120 | 60 | 8 | 36 | L250/28 | 1500 | ≤50 | 38.5 | 0.75 | 700 |
| YSK10-4 | 110-120 | 60 | 10 | 42 | L250/34 | 1500 | ≤50 | 40.5 | 0.8 | 750 |
| YSK12-4 | 110-120 | 60 | 12 | 45 | S250/28 | 1500 | ≤50 | 42.5 | 1 | 850 |
| YSK15-4 | 110-120 | 60 | 15 | 52 | L300/22 | 1500 | ≤50 | 42.5 | 1.2 | 900 |
| YSK25-4 | 110-120 | 60 | 25 | 75 | L300/28 | 1500 | ≤55 | 44.5 | 1.35 | 1200 |
| YSK34-4 | 110-120 | 60 | 34 | 85 | L300/34 | 1500 | ≤55 | 49.5 | 1.5 | 1300 |
YSK motor, side view 
YSK motor, rear view
YSK models for 220-240 V supply
On a 220-240 V supply most models are listed twice, at 50 Hz and at 60 Hz, because rated power, input power and speed change with frequency. For example, YSK10-4 (220-240 V, 60 Hz): rated power 12 W, input power 44 W.
| Model | Rated voltage (V) | Frequency (Hz) | Rated power (W) | Input power (W) | Fan blade (mm) | Rated speed (r/min) | Temperature rise (K) | A (mm) | Net weight (kg) | Air volume (m³/h) |
|---|---|---|---|---|---|---|---|---|---|---|
| YSK5-4 | 220-240 | 50 | 5 | 26 | L200/28 | 1300 | ≤55 | 37.5 | 0.61 | 300 |
| YSK5-4 | 220-240 | 60 | 6 | 24 | L200/28 | 1550 | ≤45 | 37.5 | 0.61 | 300 |
| YSK6-4 | 220-240 | 50 | 6 | 32 | L200/34 | 1300 | ≤55 | 37.5 | 0.63 | 500 |
| YSK6-4 | 220-240 | 60 | 7 | 32 | L200/34 | 1500 | ≤45 | 37.5 | 0.63 | 500 |
| YSK7-4 | 220-240 | 50 | 7 | 28 | L200/34 | 1350 | ≤50 | 37.5 | 0.65 | 550 |
| YSK7-4 | 220-240 | 60 | 9 | 30 | L200/34 | 1550 | ≤40 | 37.5 | 0.65 | 550 |
| YSK7-4 | 220-240 | 50 | 7 | 34 | L230/28 | 1300 | ≤60 | 37.5 | 0.68 | 700 |
| YSK7-4 | 220-240 | 60 | 9 | 35 | L230/28 | 1500 | ≤50 | 37.5 | 0.68 | 700 |
| YSK8-4 | 220-240 | 50 | 8 | 33 | L250/28 | 1300 | ≤50 | 37.5 | 0.7 | 750 |
| YSK8-4 | 220-240 | 60 | 11 | 36 | L250/28 | 1500 | ≤45 | 37.5 | 0.7 | 750 |
| YSK10-4 | 220-240 | 50 | 10 | 37 | L250/34 | 1300 | ≤55 | 37.5 | 0.72 | 850 |
| YSK10-4 | 220-240 | 60 | 12 | 44 | L250/34 | 1450 | ≤50 | 37.5 | 0.72 | 850 |
| YSK12-4 | 220-240 | 50 | 12 | 39 | S250/28 | 1300 | ≤55 | 38.5 | 0.8 | 900 |
| YSK12-4 | 220-240 | 60 | 14 | 47 | S250/28 | 1400 | ≤50 | 38.5 | 0.8 | 900 |
| YSK15-4 | 220-240 | 50 | 15 | 44 | L300/22 | 1300 | ≤55 | 40.5 | 1 | 1000 |
| YSK15-4 | 220-240 | 60 | 17 | 55 | L300/22 | 1500 | ≤55 | 40.5 | 1 | 1000 |
| YSK20-4 | 220-240 | 50 | 20 | 53 | L300/28 | 1300 | ≤50 | 42.5 | 1.2 | 1100 |
| YSK20-4 | 220-240 | 60 | 20 | 73 | L300/28 | 1400 | ≤65 | 42.5 | 1.2 | 1100 |
| YSK21-4 | 220-240 | 50 | 21 | 57 | L300/28 | 1300 | ≤50 | 44.5 | 1.3 | 1200 |
| YSK21-4 | 220-240 | 60 | 23 | 78 | L300/28 | 1450 | ≤60 | 44.5 | 1.3 | 1200 |
| YSK28-4 | 220-240 | 50 | 28 | 62 | L300/34 | 1350 | ≤50 | 49.5 | 1.5 | 1300 |
| YSK28-4 | 220-240 | 60 | 33 | 82 | L300/34 | 1500 | ≤50 | 49.5 | 1.5 | 1300 |
Pick the row whose air volume and fan blade code match your fan at your supply voltage and frequency, then send us that model and row with your quantity.
Construction
The stator of the YSK motor is encapsulated in BMC, a thermoset moulding compound of resin, mineral filler and glass fibre.
The rotor of the YSK fan motor runs on an all-ball bearing structure. The motors are rated for S1 continuous duty with Class B insulation, and the temperature rise of each model is listed in the tables.
Ball bearings and sleeve bearings in small fan motors
Ball bearings and sleeve bearings are the two bearing types found in small fan motors. A ball bearing carries the shaft on rolling balls between two races; a sleeve bearing carries it on a lubricated bushing.
Fan motors for refrigeration cabinets often run around the clock, so buyers specify the bearing type together with mounting orientation and service conditions.
Ordering information
- MOQ
- MOQ starts from 100 pieces and depends on the model.
- Lead time
- Standard lead time is 30–45 days; the exact schedule is confirmed with each quotation based on model and quantity.
- Samples
- Samples are available on request.
- Warranty
- Our motors come with a 24-month warranty against manufacturing defects.
- Price
- Pricing depends on model, voltage, winding material and order quantity — send your specifications for a quotation.
Payment, trade terms and sample questions are answered on the FAQ page.
Protection rating and noise level per model datasheet — request the datasheet.
Request a quotation
Tell us the model, voltage version and quantity you need.
Or write to sales@shadedpolemotor.com