YASKAWA SGMRV-13ANA-YR12 AC Servo Motor – 1.3 kW Robot Axis Solution
The YASKAWA SGMRV-13ANA-YR12 is a high-performance AC servo motor designed for demanding industrial automation and robot axis applications. Widely used on Yaskawa Motoman ES165D robots as a B/T-axis motor, it combines robust torque output, precise positioning, and long-term reliability, making it ideal as both an original fit and a replacement motor in existing systems.
Built around Yaskawa’s Sigma-series servo technology, the SGMRV-13ANA-YR12 is engineered to deliver stable motion control at medium power levels while maintaining smooth, low-vibration operation. With a rated power of 1.3 kW, rated torque of 8.34 Nm, and a nominal speed of 1,500 rpm at 200 V three-phase supply, this motor is well suited for articulated robots, positioning axes, turntables and other precise motion tasks.
Key Technical Data for SGMRV-13ANA-YR12
| Parameter | Value |
|---|---|
| Brand | YASKAWA |
| Model | SGMRV-13ANA-YR12 |
| Motor type | AC servo motor |
| Rated power | 1.3 kW |
| Rated torque | 8.34 Nm |
| Rated speed | 1,500 rpm |
| Rated voltage | 200 V AC, three-phase |
| Rated current | 14 A |
| Insulation class | F |
| Speed response frequency | 1.5 kHz (typical Sigma-series response) |
| Feedback type | Absolute encoder (UTTAH-B17TL compatible) |
| Origin | Japan |
| Typical application | Robot axis (ES165D B/T-axis), automation |
| Production status | Discontinued by manufacturer (legacy part) |
| Packaging size (approx.) | 33 × 25 × 18 cm |
| Shipping weight (approx.) | 11kg (with packaging) |
Product Overview
The SGMRV-13ANA-YR12 sits in the mid-power range of Yaskawa’s servo portfolio and is designed to handle continuous duty operation under industrial conditions. Its 1.3 kW power rating and 8.34 Nm nominal torque give it enough headroom for robot joints and machine axes that must accelerate and decelerate frequently without sacrificing accuracy or stability.
Operating from a three-phase 200 V AC supply, the motor integrates smoothly into standard Sigma-series servo systems and can be driven by compatible Yaskawa servopacks for closed-loop position, speed and torque control. The combination of a robust rotor design and high-resolution absolute encoder feedback allows the motor to maintain precise positioning even after power loss, which is especially important in robotic applications and multi-axis automation lines.
Performance and Control Characteristics
A rated speed of 1,500 rpm with good speed-response characteristics (around 1.5 kHz) gives the SGMRV-13ANA-YR12 a balanced performance profile: fast enough for dynamic moves, but optimized for smooth, controlled motion rather than extreme high-speed rotation.
The absolute encoder (commonly paired with the UTTAH-B17TL encoder type) provides high-resolution feedback for precise incremental and absolute positioning. In practice, this means the motor is capable of repeatable motion down to fractions of a millimeter when used in a properly tuned servo loop, making it suitable for tasks such as robot welding, material handling, palletizing, and component positioning where path accuracy and repeatability are critical.
Class F insulation and CCC-compliant construction support reliable operation under elevated temperatures, extending service life in enclosures or robot bases where heat buildup is common.
Typical Applications
Because the SGMRV-13ANA-YR12 was widely deployed in Yaskawa Motoman ES165D robot arms as a B/T-axis motor, it is frequently specified as a direct replacement in robot maintenance and retrofit projects.
Beyond robot joints, this motor is also suitable for:
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Rotary tables and indexing stations requiring precise angular positioning.
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Medium-load handling axes in automated assembly and packaging systems.
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Gantry and linear module drives where medium inertia and smooth motion are needed.
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General CNC and motion control systems that use Yaskawa Sigma-series servo drives.
Its legacy status (discontinued by the OEM but still in high field use) makes SGMRV-13ANA-YR12 especially relevant for maintenance engineers, spare-parts suppliers and retrofit contractors who support installed Yaskawa robot fleets and older automation lines.
Mechanical and Installation Notes
With an approximate packed size of 22.5 × 33 × 18 cm and a shipping weight around 7–10 kg, the SGMRV-13ANA-YR12 is compact enough to fit into tight robot bases and machine frames while still providing the mechanical rigidity needed for dynamic operation.
The motor is typically supplied with a keyed shaft and standardized mounting flanges, simplifying mechanical interchange with existing units of the same model. When replacing an installed SGMRV-13ANA-YR12, the usual practice is to reuse existing cabling, brackets and couplings, as the motor is designed as a drop-in replacement within its original Yaskawa system design.
Because it uses an absolute encoder, care must be taken during installation to follow correct homing and backup procedures defined by the robot or motion controller vendor. This preserves position data across power cycles and avoids unnecessary recalibration.
Electrical and System Integration
Electrically, the SGMRV-13ANA-YR12 is designed for a 200 V class three-phase AC supply and is usually paired with Yaskawa servo drives tuned to the Sigma-series response profile.
Key integration points include:
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Correct matching of motor parameters (voltage, current, encoder type and motor constants) in the drive configuration.
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Shielded power and encoder cables routed separately to minimize electromagnetic interference.
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Proper grounding of the motor frame and drive to maintain EMC compliance and protect the encoder signals.
In many installed systems, this motor is controlled by robot controllers or multi-axis motion controllers that already include parameter sets for the SGMRV-13ANA-YR12, simplifying commissioning. Where parameter sets are not pre-defined, the rated power, voltage, current, torque and encoder type can be entered manually using documentation from Yaskawa or existing installation records.
Lifecycle, Availability and Replacement Strategy
Multiple distributors list the YASKAWA SGMRV-13ANA-YR12 as a “discontinued by manufacturer” model, yet it remains widely stocked on the secondary and surplus market, both new and refurbished.
For end users and integrators, this creates two practical scenarios:
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Direct replacement
Where an existing robot or machine axis already uses SGMRV-13ANA-YR12, sourcing an identical model is usually the most efficient way to restore operation. Mounting, connectors and controller parameters can typically remain unchanged, minimizing downtime. -
Migration to alternative models
For new designs or long-term upgrade projects, it may be advisable to migrate to a current Yaskawa servo series with similar torque and power ratings, while using SGMRV-13ANA-YR12 as a transitional spare part for legacy equipment. This approach preserves continuity for installed machines while aligning new projects with the current product roadmap.
Summary
The YASKAWA SGMRV-13ANA-YR12 AC servo motor is a proven 1.3 kW, 200 V, three-phase motor purpose-built for precise, repeatable motion in industrial robots and automation systems. With 8.34 Nm rated torque, a 1,500 rpm nominal speed, absolute encoder feedback and robust insulation, it delivers the combination of accuracy, response and durability demanded in continuous-duty applications. The SGMRV-13ANA-YR12 remains an important legacy motor in many Yaskawa-based systems, particularly Motoman ES165D robot cells. For service companies, spare-parts distributors, and plant maintenance teams, a clear understanding of its technical characteristics and application context helps in specifying the right replacement, planning inventory, and keeping existing automation assets running reliably for years to come.
