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The Yaskawa SGMRV-37ANA-YR12 is a 3.7 kW Sigma-V series rotary servo motor designed for high-inertia industrial machinery, paired with the matching SGDV servo amplifier. The model code itself encodes the rating: SGMRV is the Sigma-V medium-inertia rotary line, 37 is 3.7 kW, A is the 200 V class, NA is the encoder family, and YR12 is the customization suffix. Plants running Yaskawa Sigma-V on injection molding, large CNC axes, and material-handling robots keep this part in their critical-spares list because lead times on like-for-like replacements can stretch when ordering from the global channel. This page consolidates the verified specifications, points out the difference between SGMRV and SGMGV / SGMSV families, and lists the matching amplifier and accessories.
SGMRV-37ANA-YR12 Technical Specifications
- Series: Sigma-V (Σ-V) SGMRV medium-inertia rotary servo motor
- Rated output: 3.7 kW
- Voltage class: 200 V (A)
- Inertia class: medium inertia, suited for high-load machine axes and gear-driven applications
- Encoder: serial absolute / incremental, 20-bit class typical for the Sigma-V NA family (verify against the nameplate)
- Cooling: natural cooling (self-cooled)
- Customization: YR12 — non-standard option code; confirm with Yaskawa or via the original drawing whether YR12 reflects shaft, brake, oil seal, or flange specifics for your machine
- Mounting: flange-mount, IEC standard for the SGMRV frame size at 3.7 kW
- Protection: IP67 typical for Sigma-V SGMRV (verify against the motor manual revision)
- Approvals: UL, CE, RoHS
For the exact rated torque, peak torque, rated speed, max speed, rotor inertia, and the meaning of the YR12 customization, always cross-check the Yaskawa Sigma-V product manual for the SGMRV family and confirm the YR12 option against the original machine BOM. Customization suffixes can change shaft type, oil seal, brake, and connector orientation, all of which affect mechanical fit.
Same-Series Comparison: Sigma-V Rotary Motor Families
| Series | Inertia | Power range | Typical use |
|---|---|---|---|
| SGMJV | Low inertia | 0.05 - 0.75 kW | Small high-response axes, electronics |
| SGMAV | Low inertia | 0.05 - 1.5 kW | General automation, conveyors |
| SGMPS / SGMGV | Medium inertia, lower speed | 0.45 - 15 kW | Large gantries, gear-driven machines |
| SGMRV | Medium inertia, high speed | 1.5 - 5.5 kW (typical) | Injection molding, packaging, robotics |
| SGMSV | Medium inertia | 1.0 - 7.0 kW | General machine tools, CNC axes |
Within the SGMRV line, the model is identified by the kW digits (37 = 3.7 kW), the voltage class (A = 200 V), and the encoder code. The customization suffix (YR12 here) is the field most likely to be confused; never substitute on customization suffix without confirming the option meaning, because differences in shaft, brake, or oil seal will affect mechanical drop-in.
Compatible Components and Common Pairings
An SGMRV-37ANA motor at 3.7 kW / 200 V pairs with these parts:
- Servo amplifier: matching Sigma-V SGDV amplifier sized for 3.7 kW at 200 V; the exact amplifier type code depends on the application (analog, MECHATROLINK-II / III, or pulse train)
- Encoder cable: Yaskawa JZSP-CSP series serial absolute encoder cable
- Power cable: Yaskawa JZSP-UVA series motor power cable, sized for the rated current
- Battery unit: JZSP-BA01 absolute encoder battery (only if using the absolute encoder option)
- Brake power supply: 24 VDC brake supply if the YR12 customization includes a holding brake
For machines that combine the Sigma-V servo with an upstream PLC, Rabwellplc also stocks Schneider, Allen-Bradley, and Siemens controllers in the same catalog, and the drives and motion control range covers most of the inverter and VFD pairings that sit alongside the servo axis.
Common Use Cases
- Injection molding machines using Sigma-V servo on the injection or clamp axis
- High-speed packaging and converting lines with medium-inertia loads
- Material-handling and gantry systems where the load inertia is several times the rotor inertia
- Like-for-like replacement of a failed SGMRV-37ANA-YR12 on an OEM machine where the customization suffix must match exactly
Why Buy the SGMRV-37ANA-YR12 from Rabwellplc
Rabwellplc sources the SGMRV-37ANA-YR12 as a US-stock spare and verifies the nameplate, encoder type, and customization code against the customer's machine BOM before shipping. For Sigma-V applications where the customization suffix must match (shaft, brake, or seal differences), this verification is the difference between a clean swap and a stripped fixture. The catalog also covers matching SGDV amplifiers, encoder and power cables, and the rest of the Yaskawa motion range.
Need an SGMRV-37ANA-YR12 with a verified nameplate? Check live stock on the SGMRV-37ANA-YR12 product page and send your machine drawing or original Yaskawa quote so we can confirm YR12 matches your axis.
Frequently Asked Questions
What does the model code SGMRV-37ANA-YR12 mean?
SGMRV is the Sigma-V medium-inertia rotary servo line, 37 is 3.7 kW rated output, A is the 200 V voltage class, NA is the encoder family, and YR12 is a Yaskawa customization suffix that defines shaft, brake, seal, or connector options specific to the original machine.
Is the SGMRV-37ANA-YR12 interchangeable with SGMRV-37ANA without the YR12 suffix?
Not always. The YR12 customization can change shaft, brake, oil seal, or connector. A standard SGMRV-37ANA will have the same electrical characteristics but may not be a mechanical drop-in. Confirm the customization meaning before substituting.
What servo amplifier pairs with the SGMRV-37ANA-YR12?
A Sigma-V SGDV amplifier sized for 3.7 kW at 200 V single- or three-phase, with the network or pulse-train option that matches the controller. The exact amplifier type code depends on whether the system uses MECHATROLINK-II, MECHATROLINK-III, EtherCAT, analog, or pulse-train control.
Can the SGMRV-37ANA-YR12 be replaced by a Sigma-7 motor?
Sigma-7 (SGM7 series) is the successor and offers higher resolution encoders. Some Sigma-V to Sigma-7 swaps are possible but generally require the matching Sigma-7 amplifier and parameter conversion. For like-for-like replacement of a Sigma-V axis, ordering the same Sigma-V motor remains the lowest-risk path.
Does the SGMRV-37ANA-YR12 include a holding brake?
Whether a holding brake is fitted depends on the YR12 customization. The base SGMRV is available with or without a brake; the customization suffix is what determines the actual configuration. Confirm against the original machine drawing or send the request to Rabwellplc for verification.