General Specification
- Winding type: YWE
- Hall effect angle: 120 Degree electrical angle
- Radial play: 0.025mm/400g
- End play: 0.025mm/400g
- Max. radial force: 15N @ 10mm from the flange
- Max. axial force: 10N
- Insulation class: B
- Dielectric strength: 500VDC for one minute
- Insulation resistance: 100MΩ min., 500VDC
Defination of Part number
42 | ZW | 3 | S | 41 | A | 20 | X |
Frame size | Brushless dc motor | Phase | Squared * | Length | Voltage ** | Speed | External code |
*: This code shows the sharp of the motor. S = Square; Y =Round.
**: This code shows the voltage of the motor, the detail code defination is: A=24V; B=36V; C=48V; D=170V; E=310V; F=325V; 12=12V; 15=15V
Specifications
| Model | Units | 42ZW3S 41A20 | 42ZW3S 41A40 | 42ZW3S 41A80 | 42ZW3S 61A20 | 42ZW3S 61A40 | 42ZW3S 61A80 | 42ZW3S 81A20 | 42ZW3S 81A40 | 42ZW3S 81A80 | 42ZW3S 101A20 | 42ZW3S 101A40 | 42ZW3S 101A60 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Number of poles | 8 | ||||||||||||
| Number of phase | 3 | ||||||||||||
| Rated voltage | VDC | 24 | |||||||||||
| Rated speed | RPM | 2000 | 4000 | 8000 | 2000 | 4000 | 8000 | 2000 | 4000 | 8000 | 2000 | 4000 | 6000 |
| Continuous stall torque | N.m | 0.072 | 0.072 | 0.072 | 0.144 | 0.144 | 0.144 | 0.225 | 0.225 | 0.225 | 0.300 | 0.300 | 0.300 |
| Rated torque | N.m | 0.063 | 0.063 | 0.063 | 0.125 | 0.125 | 0.125 | 0.19 | 0.19 | 0.19 | 0.250 | 0.250 | 0.250 |
| Rated power | W | 13 | 26 | 52 | 26 | 52 | 104 | 39.5 | 79 | 158 | 52.5 | 105.0 | 157.5 |
| Peak torque | N.m | 0.19 | 0.19 | 0.19 | 0.375 | 0.375 | 0.375 | 0.57 | 0.57 | 0.57 | 0.750 | 0.750 | 0.750 |
| Peak current | A | 2.7 | 5.4 | 10.8 | 5.3 | 10.6 | 21.2 | 7.25 | 14.5 | 29 | 10.00 | 20.00 | 30.00 |
| Torque constant | Nm/A | 0.074 | 0.035 | 0.02 | 0.074 | 0.035 | 0.02 | 0.074 | 0.035 | 0.02 | 0.074 | 0.035 | 0.028 |
| Back E.M.F | V/KRPM | 7.82 | 3.66 | 2.1 | 7.82 | 3.66 | 2.1 | 7.82 | 3.66 | 2.1 | 7.82 | 3.66 | 3.00 |
| Rotor inertia | g.c㎡ | 24 | 24 | 24 | 48 | 48 | 48 | 72 | 72 | 72 | 96.00 | 96.00 | 96.00 |
| Body length | mm | 41 | 41 | 41 | 61 | 61 | 61 | 81 | 81 | 81 | 101 | 101 | 101 |
| Voltage range | VDC | 12~48 | |||||||||||
| Speed Range | RPM | 2000~8000 | |||||||||||
| Weight | Kg | 0.3 | 0.3 | 0.3 | 0.45 | 0.45 | 0.45 | 0.6 | 0.6 | 0.6 | 0.80 | 0.80 | 0.80 |
| Model | Units | 42ZW3S 45A10 | 42ZW3S 45A30 | 42ZW3S 45A40 | 42ZW3S 60A10 | 42ZW3S 60A30 | 42ZW3S 60A40 | 42ZW3S 75A10 | 42ZW3S 75A30 | 42ZW3S 75A40 |
|---|---|---|---|---|---|---|---|---|---|---|
| Number ofpoles | 8 | |||||||||
| Number ofphase | 3 | |||||||||
| Ratedvoltage | VDC | 24 | ||||||||
| Ratedspeed | RPM | 1000 | 3000 | 4000 | 1000 | 3000 | 4000 | 1000 | 3000 | 4000 |
| Continuousstall torque | N.m | 0.096 | 0.096 | 0.096 | 0.19 | 0.19 | 0.19 | 0.28 | 0.28 | 0.28 |
| Ratedtorque | N.m | 0.08 | 0.08 | 0.08 | 0.16 | 0.16 | 0.16 | 0.24 | 0.24 | 0.24 |
| Ratedpower | W | 8.3 | 25 | 33.2 | 16.6 | 50 | 67 | 25 | 75 | 100 |
| Peaktorque | N.m | 0.24 | 0.24 | 0.24 | 0.57 | 0.57 | 0.57 | 0.72 | 0.72 | 0.72 |
| Peakcurrent | A | 1.3 | 3.9 | 5.2 | 2.6 | 7.8 | 10.4 | 3.9 | 11.72 | 15.63 |
| Torqueconstant | Nm/A | 0.162 | 0.06 | 0.045 | 0.162 | 0.06 | 0.045 | 0.162 | 0.03 | 0.045 |
| BackE.M.F | V/KRPM | 17.1 | 6.3 | 4.8 | 17.1 | 6.3 | 4.8 | 17.1 | 6.3 | 4.8 |
| Rotorinertia | g.c㎡ | 24 | 24 | 24 | 48 | 48 | 48 | 72 | 72 | 72 |
| Bodylength | mm | 46 | 46 | 46 | 62 | 62 | 62 | 78 | 78 | 78 |
| Voltagerange | VDC | 12~48 | ||||||||
| SpeedRange | RPM | 1000~4000 | ||||||||
| Weight | Kg | 0.3 | 0.3 | 0.3 | 0.44 | 0.44 | 0.44 | 0.56 | 0.56 | 0.56 |
In-Depth Applications for the 42mm Brushless DC Motor
The 42ZW3S’s precision and compact design make it the ideal choice for demanding industries. Key application areas include:
- Industrial Automation: Perfectly suited for small conveyor belts, sorting equipment, and automated guided vehicles (AGVs) where a reliable 42mm brushless dc motor is essential.
- Packaging & Labeling: Provides the precision required for label applicators, filling machines, and small actuators in complex packaging lines.
- Robotics & Service: Delivers the power needed for small robotic arms, mobile service robots, and antenna positioning systems that require a high-reliability 42mm brushless dc motor.
Outline

Customization
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| Shaft | Encoder | Brake | Connector | Pulley | Gearbox |
| Item | Description |
|---|---|
| Shaft Extensions | Motors can be configured with single or double-ended shafts, manufactured to your specific length. |
| Encoder Options | We offer integration with various encoders to meet specific resolution and application needs. |
| Brake Options | Motors can be equipped with an optional brake, available with or without a manual hand release. |
| Cable Harnesses | Custom cable harnesses, with or without connectors, are available upon request. |
| Pulleys & Pinion Gears | Pulleys or pinion gears can be supplied and mounted to your specifications. |
| Gearbox Integration | Most motors can be paired with various gearbox types, including planetary, worm wheel, and parallel shaft gearboxes. |
Frequently Asked Questions (FAQ)
Q: What is the primary difference between the 42ZW3S (square) and a round motor?
A: The 42ZW3S square (S-Series) design typically allows for a higher power density. This is due to more efficient use of internal space, making it preferred for industrial applications where a high-torque 42mm brushless dc motor is critical.
Q: What type of driver is required for the 42ZW3S motor?
A: This 42ZW3S is a 42mm brushless dc motor (BLDC motor) and requires a compatible BLDC driver. We offer a complete range of drivers, and our engineers can help you select the perfect match for this motor’s power and voltage requirements.
Q: Can this motor be used for precise positioning?
A: Absolutely. When integrated with an optional encoder (see customization), this 42mm brushless dc motor provides excellent closed-loop feedback, making it ideal for precise positioning, velocity, and torque control tasks.
Q: What is the expected operational lifespan of this motor?
A: The 42ZW3S series has a very long operational lifespan, often exceeding 20,000 hours. As a high-quality 42mm brushless dc motor, its primary lifespan factors are the bearings, which are selected for durability under rated load conditions.






