75mm Outer Rotor Frameless Torque Motor 485W |4.2 Nm | 4500rpm | 48 VDC
Basic Properties
Place of Origin:
CHINA
Brand Name:
SENINTER
Certification:
CE ROHS
Model Number:
SY75BLW33-48V
Product Summary
OD:75.4 mm frameless motor is a high‑speed 75.4 mm outer‑rotor frameless BLDC torque motor, powered by standard 48 VDC industrial power supply. It delivers 485 W rated power, 1.4 Nm continuous rated torque and up to 4.2 Nm peak torque, with maximum speed reaching 4500 RPM. Housing‑less split stator...
Product Details
OD:
75.4mm
ID:
51mm
Rated Torque:
1.4Nm
Rated Speed:
3300RPM
Rated Power:
485W
Rated Voltage:
48VDC
Product Description
OD:75.4 mm frameless motor
is a high‑speed 75.4 mm outer‑rotor frameless BLDC torque motor, powered by standard 48 VDC industrial power supply. It delivers 485 W rated power, 1.4 Nm continuous rated torque and up to 4.2 Nm peak torque, with maximum speed reaching 4500 RPM.
Housing‑less split stator‑rotor design enables full embedding into customer‑custom mechanical structures. At only 233 g weight and 21.2 mm stack length, it achieves outstanding power‑to‑size ratio. Low cogging ensures smooth rotation and high dynamic response for high‑speed precision motion. We provide custom winding, cable modification and OEM/ODM service for system integrators, robot manufacturers and automation equipment suppliers.Suitable for high‑speed compact automation equipment:
- Collaborative robot joints & high‑speed robotic actuators
- Industrial automation and rotary positioning platforms
- Portable medical automation devices
- High‑speed optical inspection equipment
- AGV / AMR drive and steering units
- Special‑purpose high‑speed automated machinery
Customization is available upon request for this motor series, including but not limited to rated voltage, speed, torque, lead wire specifications, outlet orientation, shaft configuration, encoder/sensor integration, and more. Please provide your specific requirements, and we will offer a tailored solution for you.
Dimensions
| Items | SY75BLW33 | Tolerance |
| Rotor outer diameter D | 75.4 mm | ±0.15 |
| Magnetic ring inner diameter D1 | 72 mm | 0/+0.05 |
| Magnetic ring length L | 21.2 mm | ±0.1 |
| Rotor bonding dimension L1 | 2 mm | ±0.3 |
| Stator inner diameter D2 | 51 mm | -0.4 |
| Stator length L2 | 14.35 mm | ±0.2 |
| Non‑wiring‑end height E | 3 mm | MAX |
| Wiring‑end height F | 5 mm | MAX |
Electrical Specifications
| Item | Unit | SY75BLW33‑48V |
| Number of poles | — | 28 |
| Number of phases | — | 3 |
| Rated voltage | VDC | 48 |
| Rated torque | N.m | 1.4 |
| Rated current | A | 12 |
| Rated speed | RPM | 3300 |
| Rated power | W | 485 |
| Maximum speed | RPM | 4500 |
| Peak torque | N.m | 4.2 |
| Peak current | A | 36 |
| Line‑to‑line resistance | ohms@20℃ | 0.23 |
| Line‑to‑line inductance | mH | 0.165 |
| Torque constant | N.m/A | 0.125 |
| Back EMF | Vrms/KRPM | 7.6 |
| Motor length | mm | 21.2 |
| Weight | g | 233 |
| Electrical time constant | ms | 0.72 |
Electric Connection:
| Color | Type | Functions |
| White (WHT) | UL1332 AWG26 | NTC |
| White (WHT) | UL1332 AWG26 | NTC |
| Yellow | UL1332 AWG24 | Phase U |
| Red | UL1332 AWG24 | Phase V |
| Black | UL1332 AWG24 | Phase W |
Torque Performance Curves
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