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Product Description
40 mm Frame Size
25 mm Stack Length
11 mm Rotor ID
0.217 Nm Rated Torque
18 VDC Rated Voltage
High torque to weight ratio
Compact & lightweight
Hall sensor and thermistor available

| Ambient Temp: | 25 ℃ |
| Winding Temp: | 155°C |
| Winding adjustment: | 0 |
| System Friction: | 0N·m |
| Heat Sink: | 7.87" x 7.87" x 0.5" |
| Bus Voltage (Vbus): | 18VDC |
| Max Cont. Torque (Tcont): | 0.221Nm |
| Max Cont. Current (Icont): | 5.82 |
| Peak Torque (Tpk): | 0.450Nm |
| Peak Current (Ipk): | 11.64Arms |
| Rated Torque (Trtd): | 0.217Nm |
| Rated Power (Prtd) | 82W |
| Rated Speed (Nrtd): | 3605RPM |
| Rm at Tamb: | 0.51Ω |
| LM: | 0.25mH |
| Back EMF: | 3.68Vpk / kRPM |
| Kt at Temp: | 0.038N·m/Arms |
| Km: | 0.049Nm/√W |
| Commutation: | sine |
| NL Comm Freq: | 245Hz |
| Stack Length: | 25mm |
| Rotor ID: | 11mm |
| Weight: | 0.188kg |
| Poles: | 6 |
40 mm frame frameless motor is a compact brushless motor that consists of a separate rotor and stator assembly with an outer diameter of approximately 40 mm.
It is designed to be integrated directly into a customer's mechanical system without a housing, shaft, or bearings.
It’s fully frameless without outer shell, split stator and rotor for customer self-assembly into machinery.
The main advantages include high torque density, compact size, low weight, improved efficiency, reduced inertia, and greater flexibility for custom machine designs.
These motors are commonly used in robotics, medical equipment, semiconductor manufacturing systems, aerospace devices, industrial automation, gimbals,
and precision positioning applications.
Yes. A frameless motor requires a compatible BLDC or servo motor controller to provide commutation, speed regulation, and torque control.
Yes. Frameless motors are ideal for direct-drive applications because they eliminate the need for gearboxes and other transmission components, resulting in higher precision and efficiency.
Many 40 mm frameless motors can be configured with optional Hall-effect sensors for rotor position detection and smoother motor control.
Key selection factors include continuous torque, peak torque, operating speed, voltage requirements, available installation space, thermal conditions, and control system compatibility.
Yes. Frameless motors are ideal for direct-drive applications because they eliminate the need for gearboxes and other transmission components, resulting in higher precision and efficiency.
Key selection factors include continuous torque, peak torque, operating speed, voltage requirements, available installation space, thermal conditions, and control system compatibility.
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