VERSATILE. SCALABLE. SIMPLE.
The MRA-RTU-1i is a precision linear actuator engineered for horizontal motion control in industrial robotic systems. Built on a single-axis platform, it provides consistent speed and torque across extended travel distances. Its aluminum extrusion base and steel carriage construction provide structural rigidity, while modular mounting options support various motor and gearbox configurations. Designed for high-cycle applications, the MRA-RTU-1i ensures dependable operation with minimal maintenance requirements.
The MRA-RTU-1i 7th-Axis Robot Transfer Unit is designed for reliable inverted (ceiling-mounted) 7th-axis motion in articulated robots. It features an extruded aluminum actuator body with T-slots for easy mounting, corrosion-resistant components, and integrated cable management. The unit supports user-defined stroke lengths, achieves near-zero backlash with a precision belt-to-pulley system, and offers positional repeatability of ±0.05 mm at speeds up to 3 m/s. A one-piece machined, stress-proof pulley and an easy-to-adjust belt tensioner provide durable performance and simplified maintenance. Washdown-duty and water-resistant configurations are available upon request. The MRA-RTU-1i is compatible with major robot brands including Yaskawa, Fanuc, KUKA, and Universal Robots. Each unit can be supplied with T-slot sensors, gearboxes, or motor mounting adaptors, and Macron Dynamics provides support for travel lengths beyond standard specifications.
These are standard specifications, if you need a custom configuration, please use our custom configuration request form.
| Motion | Inverted |
| Max Speed - Horizontal[Vertical] - mm/sec | 3000[3000] |
| Max Load - Horizontal[Vertical] - lbs | 1000[1000] |
| Repeatability - mm | +/- 0.025 |
| Moment Load - in-lbs[Nm] | 4400[497] |
| Positional Accuracy - mm/meter | +/- 0.4 |
| Acceleration Max - Gs | 1 |
| Recommended Belt Running Load - lbf[N] | 437[1945] |
| Cart Guide | Linear bearing with profile rail |
| System Weight - kg | See Data Sheet |
| Weight of Cart - lbs[kgs] | See Data Sheet |
| Weight of Belt - kgs based on travel selected | See Data Sheet |
| Travel per Revolution - mm | See Data Sheet |
| Pulley Pitch Diameter - mm | See Data Sheet |
| Pulley Material / Width - mm | See Data Sheet |
| Breakaway Torque - oz-in | 30 to 32 |
| Coefficient of Friction | 0.1 |
| Standard Travels - min to max | 150 to 5725 |
Enter your configuration options to submit a Request for a Quote or a CAD drawing:
Fits actuators: MSA-R2D, MRA-RTU-1 and MRA-RTU-1i
Includes complete cart assembly with mounting hardware. Special adjustment tools if required, sold separately
Download Datasheet
Macron Dynamics specializes in designing and building virtually any configuration to meet your unique automation needs. Our innovative solutions enhance efficiency, optimize workspace utilization, and prioritize worker safety—reducing injuries while maximizing productivity.
We offer custom solutions for applications requiring from one to thousands of units. And units physically much smaller and larger than our standard models.
