Overview
The EYOU PH08N is an internal rotor torque motor offered without a brake, with selectable 51 or 101 gear ratio options for humanoid robots, robotic arms, exoskeletons, quadruped robots, AGV vehicles, and ARU robots. Both options use a 24–36 V operating voltage, 36 W rated power, a 19-bit dual magnetic encoder, and a listed 40 mm diameter. Choose the ratio according to its listed speed, rated torque, and peak torque.
Features
- Internal rotor torque motor with a dual magnetic encoder.
- Output-facing end with a central circular opening, circular mounting-hole pattern, and perimeter fasteners.
- Rear panel with two yellow two-contact connectors, two white multipin connectors, a small rectangular port or recess, and a recessed white toothed connector.
- Silver cylindrical body with a black ring at the output end.
Specifications
Performance and electrical specifications
| Parameter | Gear Ratio 51 | Gear Ratio 101 |
|---|---|---|
| Model | PH08 | PH08 |
| Motor Type | Internal Rotor Torque Motor | Internal Rotor Torque Motor |
| Diameter | 40 mm | 40 mm |
| Through Bore ID | 4.6 mm | 4.6 mm |
| Weight (With Brake / Without Brake) | /185 g | /185 g |
| Backlash | 15 arcsec | 15 arcsec |
| Noise | <70 dB | <70 dB |
| Temperature Range | -20 to 80 °C | -20 to 80 °C |
| Operating Voltage | 24–36 V | 24–36 V |
| Rated Power | 36 W | 36 W |
| Gear Ratio | 51 | 101 |
| Rated Speed | 60 rpm | 30 rpm |
| Rated Torque | 1 N·m | 1.6 N·m |
| Peak Torque | 2.8 N·m | 3.5 N·m |
| Encoder Accuracy | 19 bit | 19 bit |
| Encoder Type | Dual Magnetic Encoder | Dual Magnetic Encoder |
Installation drawing dimensions
The following dimensions and mounting references are stated on the PH08 installation drawing.
| Drawing reference | Value |
|---|---|
| Overall body diameter | Ø39.5 ±0.1 |
| Overall length | 43.8 ±0.05 |
| Mounting-face pattern | Ø36 with 8-M2 threaded holes, depth 4 |
| Mounting pattern | Ø26 with 8-M1.6 threaded holes, depth 3 |
| Holes | Eight Ø2 holes, depth 5 |
| Rear-face central opening | Ø4.4 |
| Front mounting-face angular reference | 22.5° |
| Side interface diameter | Ø29.5 |
| Interface-area dimension | 30 |
| Front interface-area dimensions | 9 and 4.5 |
| Detailed interface section | 2.5 ±0.02 |
| Detailed interface section | 3.5 |
| Position reference | “Position using this location.” |
EYOU PH08 Motor — 3D Model (STP)
PH08 — Installation Drawing (PDF)
Applications
- Humanoid robots
- Robotic arms
- Exoskeletons
- Quadruped robots
- AGV vehicles
- ARU robots
Visual Details
Product Views





Interfaces and Connections



Dimensions and Construction
