16 mm Slotless Brushless DC Motor
Compact 16 mm slotless (ironless-winding) brushless DC motor family designed for high-speed rotary motion applications requiring Hall sensor feedback, low cogging, and smooth, low-noise torque output in robotics, laboratory automation, medical devices, AGV/AMR systems, and industrial automation.
Available in three body lengths — 16ZWWC24, 16ZWWC40, and 16ZWWC56 — across seven voltage and winding configurations, this slotless BLDC family delivers 10.8–73.5 W rated power, 3.2–14.6 mN·m rated torque, and no-load speeds up to 58,000 RPM, with optional precision or silent planetary gearbox configurations available for precision motion applications.
Motor Characteristics
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| Specification | Unit | 16ZWWC24 | 16ZWWC40 | 16ZWWC56 | ||||
|---|---|---|---|---|---|---|---|---|
| 12V | 18V | 24V | 36V | 48V | 12V (Delta) | 24V | ||
| Pole Pairs | - | 1 | ||||||
| Terminal Resistance, Phase-Phase | Ω | 2.408 | 0.63 | 1.31 | 1.85 | 3.15 | 0.3196 | 0.4971 |
| Terminal Inductance, Phase-Phase | mH | 0.067 | 0.033 | 0.045 | 0.096 | 0.2 | 0.014 | 0.033 |
| Winding Connection Method | - | Delta | Star | Delta | Star | |||
| Insulation Class | - | B | ||||||
| Duty Type | - | S2 | ||||||
| Feedback Method | - | Hall Sensor | ||||||
| Commutation Angle | - | 120° | ||||||
| Insulation Strength (Withstand Voltage) | - | 500VAC/1KHz/1mA/1s | ||||||
| Insulation Resistance | - | 100MΩ/500VDC | ||||||
| Weight | g | 26.5 | 47 | 63 | ||||
| Rated Voltage | V | 12 | 18 | 24 | 36 | 48 | 12 | 24 |
| Rated Power | W | 10.8 | 33 | 39 | 27.26 | 73.5 | ||
| Rated Torque | mN·m | 3.2 | 7.4 | 7.5 | 7.4 | 7.5 | 14.6 | |
| Rated Speed | RPM | 32300 | 44000 | 51300 | 50000 | 34700 | 48100 | |
| Rated Current | A | 1.21 | 2.19 | 1.96 | 1.32 | 0.95 | 3 | 3.81 |
| No Load Speed | RPM | 44000 | 50000 | 58000 | 56000 | 40000 | 54000 | |
| No Load Current | A | 0.35 | 0.31 | 0.22 | 0.15 | 0.12 | 0.4 | 0.5 |
| Motor Efficiency | % | 75.5 | 85 | 84 | 82.4 | 84.92 | 81.4 | 87.1 |
| Noise (Ambient 20dB, Test Distance 1m) | dB | <50 | ||||||
| Thermal Resistance | K/W | 17 | 16.7 | 13.8 | ||||
| Thermal Time Constant | S | 1.62 | 1.79 | 4.23 | ||||
| Ambient Temperature | ℃ | 22.3 | ||||||
| Max Winding Temperature | ℃ | 100 | ||||||
| Torque Constant | mN·m/A | 2.6 | 3.38 | 3.78 | 5.66 | 7.75 | 2.86 | 4.24 |
| Back-EMF Constant, Peak Value | V/Krpm | 0.38 | 0.50 | 0.56 | 0.84 | 1.15 | 0.42 | 0.62 |
| Back-EMF Constant, Effective Value | V/Krpm | 0.27 | 0.35 | 0.40 | 0.59 | 0.81 | 0.3 | 0.44 |
| Peak Torque | mN·m | 9 | 96.65 | 69.21 | 110.19 | 118.13 | 53 | 140 |
| Peak Current | A | 4.9 | 29 | 18 | 19 | 15 | 19 | 39 |
| Rotor Inertia | g·cm² | 0.3 | 0.583 | 0.58 | 0.8 | |||
| Mechanical Time Constant | ms | 10.69 | 3.21 | 5.35 | 3.36 | 3.06 | 2.28 | 2.21 |
| End Bell | - | Stainless Steel | ||||||
| Bearing | - | Deep Groove Ball Bearing | ||||||
| Magnet | - | Sinter NdFeB | ||||||
| Rotation Shaft | - | Carbon Steel | ||||||
Dimensional Drawing
Outline and dimensions apply across all three body-length variants (16ZWWC24, 16ZWWC40, 16ZWWC56) at a constant 16 mm diameter.
Torque Performance Curves
Customization Options
The 16 mm Slotless Brushless DC Motor can be paired with a precision planetary gearbox to increase output torque and reduce output speed. Contact our engineering team for shaft, cable, and connector customization requests for this series.
Precision Planetary Gearbox
The 16 mm Slotless BLDC motor ships standard with the 16 mm gearbox below. DINGS' offers 10 precision planetary gearbox sizes from 6 mm to 42 mm — browse any size for reference.
| Specification | Unit | Stage 1 | Stage 2 | Stage 3 |
|---|---|---|---|---|
| Gear Ratio | X : 1 | 3.9 | 15 | 57 |
| Max. backlash | ° | 1.8 | 2.0 | 2.2 |
| Max. continuous output power | W | 0.65 | 0.4 | 0.2 |
| Max. peak output power | W | 0.8 | 0.5 | 0.25 |
| Max. continuous input speed | rpm | 20000 | ||
| Max. peak input speed | rpm | 25000 | ||
| Max. continuous torque | N·m | 0.002 | 0.005 | 0.01 |
| Max. peak torque | N·m | 0.005 | 0.01 | 0.02 |
| Max. efficiency | % | 88 | 77 | 68 |
| Weight | g | 1.6 | 2 | 2.4 |
| Gearbox length L | mm | 4.7 | 7.2 | 9.7 |
| Specification | Unit | Stage 1 | Stage 2 | Stage 3 |
|---|---|---|---|---|
| Gear Ratio | X : 1 | 4 | 16 | 64 |
| Max. backlash | ° | 1.8 | 2.0 | 2.2 |
| Max. continuous output power | W | 0.84 | 0.52 | 0.4 |
| Max. peak output power | W | 1.05 | 0.65 | 0.5 |
| Max. continuous input speed | rpm | 14000 | ||
| Max. peak input speed | rpm | 20000 | ||
| Max. continuous torque | N·m | 0.01 | 0.02 | 0.06 |
| Max. peak torque | N·m | 0.015 | 0.03 | 0.09 |
| Max. efficiency | % | 90 | 81 | 72 |
| Weight | g | 2.6 | 3.2 | 3.8 |
| Gearbox length L | mm | 5.5 | 8.1 | 10.7 |
| Specification | Unit | Stage 1 | Stage 2 | Stage 3 | Stage 4 |
|---|---|---|---|---|---|
| Gear Ratio | X : 1 | 4.25 | 18 | 77 | 326 |
| Max. backlash | ° | 1.5 | 1.8 | 2.0 | 2.2 |
| Max. continuous output power | W | 1.6 | 1.2 | 1.0 | 0.4 |
| Max. peak output power | W | 2 | 1.5 | 1.3 | 0.5 |
| Max. continuous input speed | rpm | 14000 | |||
| Max. peak input speed | rpm | 18000 | |||
| Max. continuous torque | N·m | 0.01 | 0.03 | 0.10 | 0.15 |
| Max. peak torque | N·m | 0.02 | 0.05 | 0.15 | 0.2 |
| Max. efficiency | % | 90 | 81 | 73 | 65 |
| Weight | g | 6.8 | 7.3 | 7.8 | 8.3 |
| Gearbox length L | mm | 10.1 | 13.6 | 17.1 | 20.6 |
| Specification | Unit | Stage 1 | Stage 2 | Stage 3 | Stage 4 |
|---|---|---|---|---|---|
| Gear Ratio | X : 1 | 4.3 | 18.4 | 79 | 337 |
| Max. backlash | ° | 1.2 | 1.5 | 1.8 | 2.1 |
| Max. continuous output power | W | 2.0 | 1 | 0.5 | 0.25 |
| Max. peak output power | W | 2.5 | 1.25 | 0.65 | 0.3 |
| Max. continuous input speed | rpm | 16000 | |||
| Max. peak input speed | rpm | 20000 | |||
| Max. continuous torque | N·m | 0.08 | 0.11 | 0.14 | 0.17 |
| Max. peak torque | N·m | 0.1 | 0.14 | 0.18 | 0.21 |
| Max. efficiency | % | 90 | 80 | 75 | 65 |
| Weight | g | 9 | 12 | 15 | 18 |
| Gearbox length L | mm | 11.3 | 15.1 | 18.9 | 22.7 |
| Specification | Unit | Stage 1 | Stage 2 | Stage 3 | Stage 4 |
|---|---|---|---|---|---|
| Gear Ratio | X : 1 | 4.3 | 18.4 | 79 | 337 |
| Max. backlash | ° | 1.1 | 1.3 | 1.45 | 1.7 |
| Max. continuous output power | W | 4.0 | 2.0 | 1.0 | 0.4 |
| Max. peak output power | W | 5.0 | 2.5 | 1.25 | 0.5 |
| Max. continuous input speed | rpm | 14000 | 16000 | ||
| Max. peak input speed | rpm | 18000 | 20000 | ||
| Max. continuous torque | N·m | 0.16 | 0.2 | 0.25 | 0.3 |
| Max. peak torque | N·m | 0.2 | 0.25 | 0.31 | 0.38 |
| Max. efficiency | % | 90 | 80 | 75 | 65 |
| Weight | g | 11 | 15 | 19 | 23 |
| Gearbox length L | mm | 11.8 | 16.1 | 20.4 | 24.7 |
| Specification | Unit | Stage 1 | Stage 2 | Stage 3 | Stage 4 |
|---|---|---|---|---|---|
| Gear Ratio | X : 1 | 3.9, 5.3 | 16, 21, 28 | 62, 83, 111, 150 | 243, 326, 439, 590, 794 |
| Max. backlash | ° | 1.0 | 1.2 | 1.3 | 1.4 |
| Max. continuous output power | W | 6.5 | 3.2 | 1.6 | 0.6 |
| Max. peak output power | W | 8.0 | 4.0 | 2.0 | 0.75 |
| Max. continuous input speed | rpm | 12000 | 14000 | ||
| Max. peak input speed | rpm | 15000 | 18000 | ||
| Max. continuous torque | N·m | 0.2 | 0.25 | 0.35 | 0.45 |
| Max. peak torque | N·m | 0.25 | 0.35 | 0.45 | 0.55 |
| Max. efficiency | % | 90 | 80 | 75 | 65 |
| Weight | g | 25 | 31 | 37 | 42 |
| Gearbox length L | mm | 18.7 | 25.5 | 30.2 | 35 |
| Specification | Unit | Stage 1 | Stage 2 | Stage 3 | Stage 4 |
|---|---|---|---|---|---|
| Gear Ratio | X : 1 | 3.9, 5.3 | 16, 21, 28 | 62, 83, 111, 150 | 243, 326, 439, 590, 794 |
| Max. backlash | ° | 0.85 | 1.05 | 1.2 | 1.35 |
| Max. continuous output power | W | 24 | 12 | 6.0 | 1.6 |
| Max. peak output power | W | 30 | 15 | 7.5 | 2.0 |
| Max. continuous input speed | rpm | 8000 | 10000 | ||
| Max. peak input speed | rpm | 10000 | 12500 | ||
| Max. continuous torque | N·m | 0.5 | 0.7 | 1.2 | 1.5 |
| Max. peak torque | N·m | 0.6 | 0.9 | 1.5 | 1.9 |
| Max. efficiency | % | 90 | 81 | 74 | 66 |
| Weight | g | 59 | 83 | 97 | 112 |
| Gearbox length L | mm | 22.3 | 33 | 39.6 | 46.3 |
| Specification | Unit | Stage 1 | Stage 2 | Stage 3 | Stage 4 |
|---|---|---|---|---|---|
| Gear Ratio | X : 1 | 3.9, 5.3 | 16, 21, 28 | 62, 83, 111, 150 | 243, 326, 439, 590, 794 |
| Max. backlash | ° | 0.5 | 0.6 | 0.7 | 0.75 |
| Max. continuous output power | W | 100 | 50 | 25 | 8.0 |
| Max. peak output power | W | 125 | 62 | 31 | 10 |
| Max. continuous input speed | rpm | 6000 | 7000 | ||
| Max. peak input speed | rpm | 7500 | 8750 | ||
| Max. continuous torque | N·m | 1.25 | 2.90 | 5.0 | |
| Max. peak torque | N·m | 1.6 | 3.6 | 6.3 | |
| Max. efficiency | % | 90 | 81 | 72 | 65 |
| Weight | g | 103 | 150 | 174 | 198 |
| Gearbox length L | mm | 24.2 | 36.9 | 43.5 | 50.2 |
| Specification | Unit | Stage 1 | Stage 2 | Stage 3 | Stage 4 |
|---|---|---|---|---|---|
| Gear Ratio | X : 1 | 3.9, 5.3 | 16, 21, 28 | 62, 83, 111, 150 | 243, 326, 439, 590, 794 |
| Max. backlash | ° | 0.5 | 0.6 | 0.7 | 0.8 |
| Max. continuous output power | W | 185 | 90 | 45 | 15 |
| Max. peak output power | W | 230 | 115 | 60 | 19 |
| Max. continuous input speed | rpm | 6000 | |||
| Max. peak input speed | rpm | 7500 | |||
| Max. continuous torque | N·m | 2.3 | 5.4 | 9.3 | |
| Max. peak torque | N·m | 2.9 | 6.8 | 11.6 | |
| Max. efficiency | % | 90 | 80 | 72 | 65 |
| Weight | g | 156 | 238 | 277 | 315 |
| Gearbox length L | mm | 30 | 44.7 | 51.3 | 58 |
| Specification | Unit | Stage 1 | Stage 2 | Stage 3 | Stage 4 |
|---|---|---|---|---|---|
| Gear Ratio | X : 1 | 3.9, 5.3 | 16, 21, 28 | 62, 83, 111, 150 | 243, 326, 439, 590, 794 |
| Max. backlash | ° | 0.3 | 0.4 | 0.5 | 0.6 |
| Max. continuous output power | W | 480 | 200 | 85 | 20 |
| Max. peak output power | W | 600 | 250 | 106 | 25 |
| Max. continuous input speed | rpm | 6000 | |||
| Max. peak input speed | rpm | 7500 | |||
| Max. continuous torque | N·m | 3.0 | 7.5 | 15 | |
| Max. peak torque | N·m | 4.5 | 11.3 | 22.5 | |
| Max. efficiency | % | 90 | 81 | 72 | 64 |
| Weight | g | 252 | 405 | 476 | 544 |
| Gearbox length L | mm | 36.1 | 54.9 | 63.6 | 72.4 |
Gear ratios shown above reflect standard stock configurations for each size. Additional gear ratios and stage combinations are available upon request — contact our engineering team to configure a custom reduction for your application.
Request Precision Planetary Gearbox Quote →Downloads
Part Number Builder
16 mm motor diameter
Slotless (ironless-winding) brushless DC motor series
Body length designation, mm
Hall sensor feedback is standard
Swipe left or right to view the full table.
| Part Number | Rated Voltage | Winding | Rated Power | Rated Torque | Rated Speed |
|---|---|---|---|---|---|
| 16ZWWC24 | 12 V | Delta | 10.8 W | 3.2 mN·m | 32300 RPM |
| 16ZWWC40 | 18 V | Star | 33 W | 7.4 mN·m | 44000 RPM |
| 16ZWWC40 | 24 V | Star | 39 W | 7.4 mN·m | 51300 RPM |
| 16ZWWC40 | 36 V | Star | 39 W | 7.5 mN·m | 50000 RPM |
| 16ZWWC40 | 48 V | Star | 39 W | 7.4 mN·m | 50000 RPM |
| 16ZWWC40 | 12 V | Delta | 27.26 W | 7.5 mN·m | 34700 RPM |
| 16ZWWC56 | 24 V | Star | 73.5 W | 14.6 mN·m | 48100 RPM |
Need Help Selecting the Right 16 mm Slotless BLDC Motor?
Whether you need a standard motor, integrated gearbox, or a custom winding, our engineering team can help you select the right configuration for your application.