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STR 125E Frame
This versatile solution features programmable output motions with low-wear rolling contact. Larger inertia load transmission is achieved with internal cam ratio reduction while maintaining powerful torque with less motor horsepower. The STR’s unique no-backlash preloaded mechanism improves the overall dynamics to force output motions to a new level of rigidity and accurate servo controller performance. The compact design reduces footprint while offering high speed rotation with large bending moment capacity.
Technical Data
STR 125E 1 Stage Specifications with EVB 090
| Ratio | Unit | Note | 20 |
| Nominal Torque | [Nm] | *1 | 548 |
| Acceleration Torque | [Nm] | – | 939 |
| No Load Torque | [Nm] | *1 | 3.8 |
| Nominal Input Speed | [rpm] | *2 | 600 |
| Maximum Input Speed | [rpm] | *2 | 1600 |
| Reflected Inertia | [kg-m2x10-4] | *3 | 14.85 |
| Reflected Inertia (≤ Ø8) | [kg-m2x10-4] | *3 | – |
| Reflected Inertia (≤ Ø14) | [kg-m2x10-4] | *3 | – |
| Reflected Inertia (≤ Ø19) | [kg-m2x10-4] | *3 | – |
| Reflected Inertia (≤ Ø28) | [kg-m2x10-4] | *3 | – |
| Backlash | [arc-min] | – | 0 |
| Angular Transmission Accuracy | [arc-min] | – | ≤ 0.7 |
| Angular Repeatability Accuracy | [arc-min] | – | ±0.08 |
| Surface Runout | [µm (max)] | – | 10 |
| Weight | [kg] | – | 36.3 |
| Maximum Axial Load | [N] | – | 8178 |
| Maximum Radial Load | [N] | – | 7452 |
| Maximum Tilting Moment Load | [Nm] | – | 764 |
| Efficiency | [%] | – | 80 |
| Protection Class | – | *4 | IP54 (IP65) |
STR 125E 2 Stage Specifications with EVB 090
| Ratio | Unit | Note | 60 | 80 | 100 | 120 | 140 | 160 | 180 | 200 |
| Nominal Torque | [Nm] | *1 | 548 | 548 | 548 | 548 | 548 | 548 | 548 | 548 |
| Acceleration Torque | [Nm] | – | 939 | 939 | 939 | 939 | 939 | 939 | 939 | 939 |
| No Load Torque | [Nm] | *1 | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 |
| Nominal Input Speed | [rpm] | *2 | 1800 | 2400 | 3000 | 3000 | 3000 | 3000 | 3000 | 3000 |
| Maximum Input Speed | [rpm] | *2 | 4800 | 6000 | 6000 | 6000 | 6000 | 6000 | 6000 | 6000 |
| Reflected Inertia | [kg-m2x10-4] | *3 | – | – | – | – | – | – | – | – |
| Reflected Inertia (≤ Ø8) | [kg-m2x10-4] | *3 | – | – | – | – | – | – | – | – |
| Reflected Inertia (≤ Ø14) | [kg-m2x10-4] | *3 | 2.147 | 1.927 | 1.837 | 1.797 | 1.767 | 1.747 | 1.737 | 1.727 |
| Reflected Inertia (≤ Ø19) | [kg-m2x10-4] | *3 | 2.477 | 2.257 | 2.167 | 2.127 | 2.097 | 2.077 | 2.067 | 2.057 |
| Reflected Inertia (≤ Ø28) | [kg-m2x10-4] | *3 | 4.607 | 4.387 | 4.297 | 4.247 | 4.217 | 4.207 | 4.197 | 4.187 |
| Backlash | [arc-min] | – | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Angular Transmission Accuracy | [arc-min] | – | ≤ 0.7 | ≤ 0.7 | ≤ 0.7 | ≤ 0.7 | ≤ 0.7 | ≤ 0.7 | ≤ 0.7 | ≤ 0.7 |
| Angular Repeatability Accuracy | [arc-min] | – | ±0.08 | ±0.08 | ±0.08 | ±0.08 | ±0.08 | ±0.08 | ±0.08 | ±0.08 |
| Surface Runout | [µm (max)] | – | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 |
| Weight | [kg] | – | 41.4 | 41.4 | 41.4 | 41.4 | 41.4 | 41.4 | 41.4 | 41.4 |
| Maximum Axial Load | [N] | – | 8178 | 8178 | 8178 | 8178 | 8178 | 8178 | 8178 | 8178 |
| Maximum Radial Load | [N] | – | 7452 | 7452 | 7452 | 7452 | 7452 | 7452 | 7452 | 7452 |
| Maximum Tilting Moment Load | [Nm] | – | 764 | 764 | 764 | 764 | 764 | 764 | 764 | 764 |
| Efficiency | [%] | – | 72 | 72 | 72 | 72 | 72 | 72 | 72 | 72 |
| Protection Class | – | *4 | IP54 (IP65) | IP54 (IP65) | IP54 (IP65) | IP54 (IP65) | IP54 (IP65) | IP54 (IP65) | IP54 (IP65) | IP54 (IP65) |
STR 125E 3 Stage Specifications with EVB 090
| Ratio | Unit | Note | 300 | 320 | 400 | 500 | 560 | 600 | 700 |
| Nominal Torque | [Nm] | *1 | 548 | 548 | 548 | 548 | 548 | 548 | 548 |
| Acceleration Torque | [Nm] | – | 939 | 939 | 939 | 939 | 939 | 939 | 939 |
| No Load Torque | [Nm] | *1 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 |
| Nominal Input Speed | [rpm] | *2 | 3000 | 3000 | 3000 | 3000 | 3000 | 3000 | 3000 |
| Maximum Input Speed | [rpm] | *2 | 6000 | 6000 | 6000 | 6000 | 6000 | 6000 | 6000 |
| Reflected Inertia (Single) | [kg-m2x10-4] | *3 | – | – | – | – | – | – | – |
| Reflected Inertia (≤ Ø8) | [kg-m2x10-4] | *3 | 0.377 | 0.417 | 0.367 | 0.357 | 0.407 | 0.287 | 0.357 |
| Reflected Inertia (≤ Ø14) | [kg-m2x10-4] | *3 | 0.447 | 0.497 | 0.437 | 0.437 | 0.487 | 0.367 | 0.437 |
| Reflected Inertia (≤ Ø19) | [kg-m2x10-4] | *3 | 0.637 | 0.687 | 0.627 | 0.627 | 0.677 | 0.547 | 0.627 |
| Reflected Inertia (≤ Ø28) | [kg-m2x10-4] | *3 | – | – | – | – | – | – | – |
| Backlash | [arc-min] | – | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Angular Transmission Accuracy | [arc-min] | – | ≤ 0.7 | ≤ 0.7 | ≤ 0.7 | ≤ 0.7 | ≤ 0.7 | ≤ 0.7 | ≤ 0.7 |
| Angular Repeatability Accuracy | [arc-min] | – | ±0.08 | ±0.08 | ±0.08 | ±0.08 | ±0.08 | ±0.08 | ±0.08 |
| Surface Runout | [µm (max)] | – | 10 | 10 | 10 | 10 | 10 | 10 | 10 |
| Weight | [kg] | – | 40.7 | 40.7 | 40.7 | 40.7 | 40.7 | 40.7 | 40.7 |
| Maximum Axial Load | [N] | – | 8178 | 8178 | 8178 | 8178 | 8178 | 8178 | 8178 |
| Maximum Radial Load | [N] | – | 7452 | 7452 | 7452 | 7452 | 7452 | 7452 | 7452 |
| Maximum Tilting Moment Load | [Nm] | – | 764 | 764 | 764 | 764 | 764 | 764 | 764 |
| Efficiency | [%] | – | 68 | 68 | 68 | 68 | 68 | 68 | 68 |
| Protection Class | – | *4 | IP54 (IP65) | IP54 (IP65) | IP54 (IP65) | IP54 (IP65) | IP54 (IP65) | IP54 (IP65) | IP54 (IP65) |
| Ratio | Unit | Note | 800 | 900 | 1000 | 1200 | 1400 | 1600 | 1800 | 2000 |
| Nominal Torque | [Nm] | *1 | 548 | 548 | 548 | 548 | 548 | 548 | 548 | 548 |
| Acceleration Torque | [Nm] | – | 939 | 939 | 939 | 939 | 939 | 939 | 939 | 939 |
| No Load Torque | [Nm] | *1 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 |
| Nominal Input Speed | [rpm] | *2 | 3000 | 3000 | 3000 | 3000 | 3000 | 3000 | 3000 | 3000 |
| Maximum Input Speed | [rpm] | *2 | 6000 | 6000 | 6000 | 6000 | 6000 | 6000 | 6000 | 6000 |
| Reflected Inertia (Single) | [kg-m2x10-4] | *3 | – | – | – | – | – | – | – | – |
| Reflected Inertia (≤ Ø8) | [kg-m2x10-4] | *3 | 0.287 | 0.357 | 0.287 | 0.287 | 0.287 | 0.287 | 0.287 | 0.287 |
| Reflected Inertia (≤ Ø14) | [kg-m2x10-4] | *3 | 0.357 | 0.427 | 0.357 | 0.357 | 0.357 | 0.357 | 0.357 | 0.357 |
| Reflected Inertia (≤ Ø19) | [kg-m2x10-4] | *3 | 0.547 | 0.617 | 0.547 | 0.547 | 0.547 | 0.547 | 0.547 | 0.547 |
| Reflected Inertia (≤ Ø28) | [kg-m2x10-4] | *3 | – | – | – | – | – | – | – | – |
| Backlash | [arc-min] | – | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Angular Transmission Accuracy | [arc-min] | – | ≤ 0.7 | ≤ 0.7 | ≤ 0.7 | ≤ 0.7 | ≤ 0.7 | ≤ 0.7 | ≤ 0.7 | ≤ 0.7 |
| Angular Repeatability Accuracy | [arc-min] | – | ±0.08 | ±0.08 | ±0.08 | ±0.08 | ±0.08 | ±0.08 | ±0.08 | ±0.08 |
| Surface Runout | [µm (max)] | – | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 |
| Weight | [kg] | – | 40.7 | 40.7 | 40.7 | 40.7 | 40.7 | 40.7 | 40.7 | 40.7 |
| Maximum Axial Load | [N] | – | 8178 | 8178 | 8178 | 8178 | 8178 | 8178 | 8178 | 8178 |
| Maximum Radial Load | [N] | – | 7452 | 7452 | 7452 | 7452 | 7452 | 7452 | 7452 | 7452 |
| Maximum Tilting Moment Load | [Nm] | – | 764 | 764 | 764 | 764 | 764 | 764 | 764 | 764 |
| Efficiency | [%] | – | 68 | 68 | 68 | 68 | 68 | 68 | 68 | 68 |
| Protection Class | – | *4 | IP54 (IP65) | IP54 (IP65) | IP54 (IP65) | IP54 (IP65) | IP54 (IP65) | IP54 (IP65) | IP54 (IP65) | IP54 (IP65) |
- At nominal input speed
- Speeds are at the actuator input. Limits when used with additional gearbox are higher
- At input shaft
- IP65 (wash-down) is available as an option. Contact Nidec Drive Technology for more details and our food grade options
