Request Quote
Request a quote from Nidec Drive Technology America Corporation.
STR 250E 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 250E 1 Stage Specifications with EVB 180
| Ratio | Unit | Note | 20 |
| Nominal Torque | [Nm] | *1 | 4006 |
| Acceleration Torque | [Nm] | – | 6072 |
| No Load Torque | [Nm] | *1 | 14.5 |
| Nominal Input Speed | [rpm] | *2 | 400 |
| Maximum Input Speed | [rpm] | *2 | 800 |
| Reflected Inertia (Single) | [kg-m2x10-4] | *3 | 430.041 |
| Reflected Inertia (≤ Ø14) | [kg-m2x10-4] | *3 | – |
| Reflected Inertia (≤ Ø19) | [kg-m2x10-4] | *3 | – |
| Reflected Inertia (≤ Ø28) | [kg-m2x10-4] | *3 | – |
| Reflected Inertia (≤ Ø38) | [kg-m2x10-4] | *3 | – |
| Backlash | [arc-min] | – | 0 |
| Angular Transmission Accuracy | [arc-min] | – | ≤ 1.5 |
| Angular Repeatability Accuracy | [arc-min] | – | ±0.15 |
| Surface Runout | [µm (max)] | – | 20 |
| Weight | [kg] | – | 383 |
| Maximum Axial Load | [N] | – | 38051 |
| Maximum Radial Load | [N] | – | 11165 |
| Maximum Tilting Moment Load | [Nm] | – | 2478.6 |
| Efficiency | [%] | – | 80 |
| Protection Class | – | *4 | IP54 (IP65) |
STR 250E 2 Stage Specifications with EVB 180
| Ratio | Unit | Note | 60 | 80 | 100 | 120 | 140 | 160 | 180 | 200 |
| Nominal Torque | [Nm] | *1 | 4006 | 4006 | 4006 | 4006 | 4006 | 4006 | 4006 | 4006 |
| Acceleration Torque | [Nm] | – | 6072 | 6072 | 6072 | 6072 | 6072 | 6072 | 6072 | 6072 |
| No Load Torque | [Nm] | *1 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 |
| Nominal Input Speed | [rpm] | *2 | 1500 | 1500 | 1500 | 1500 | 1500 | 1500 | 1500 | 1500 |
| Maximum Input Speed | [rpm] | *2 | 3000 | 3000 | 3000 | 3000 | 3000 | 3000 | 3000 | 3000 |
| Reflected Inertia | [kg-m2x10-4] | *3 | – | – | – | – | – | – | – | – |
| Reflected Inertia (≤ Ø14) | [kg-m2x10-4] | *3 | – | – | – | – | – | – | – | – |
| Reflected Inertia (≤ Ø19) | [kg-m2x10-4] | *3 | 94.785 | 78.795 | 72.965 | 69.815 | 67.505 | 66.345 | 65.675 | 65.355 |
| Reflected Inertia (≤ Ø28) | [kg-m2x10-4] | *3 | 129.675 | 113.675 | 107.875 | 104.675 | 102.375 | 101.175 | 100.535 | 100.215 |
| Reflected Inertia (≤ Ø38) | [kg-m2x10-4] | *3 | 215.275 | 199.275 | 193.475 | 190.275 | 187.975 | 186.775 | 186.175 | 185.775 |
| Backlash | [arc-min] | – | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Angular Transmission Accuracy | [arc-min] | – | ≤ 1.5 | ≤ 1.5 | ≤ 1.5 | ≤ 1.5 | ≤ 1.5 | ≤ 1.5 | ≤ 1.5 | ≤ 1.5 |
| Angular Repeatability Accuracy | [arc-min] | – | ±0.15 | ±0.15 | ±0.15 | ±0.15 | ±0.15 | ±0.15 | ±0.15 | ±0.15 |
| Surface Runout | [µm (max)] | – | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 |
| Weight | [kg] | – | 432 | 432 | 432 | 432 | 432 | 432 | 432 | 432 |
| Maximum Axial Load | [N] | – | 38051 | 38051 | 38051 | 38051 | 38051 | 38051 | 38051 | 38051 |
| Maximum Radial Load | [N] | – | 11165 | 11165 | 11165 | 11165 | 11165 | 11165 | 11165 | 11165 |
| Maximum Tilting Moment Load | [Nm] | – | 2478.6 | 2478.6 | 2478.6 | 2478.6 | 2478.6 | 2478.6 | 2478.6 | 2478.6 |
| 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 250E 3 Stage Specifications with EVB 180
| Ratio | Unit | Note | 300 | 320 | 400 | 500 | 560 | 600 | 700 |
| Nominal Torque | [Nm] | *1 | 4006 | 4006 | 4006 | 4006 | 4006 | 4006 | 4006 |
| Acceleration Torque | [Nm] | – | 6072 | 6072 | 6072 | 6072 | 6072 | 6072 | 6072 |
| No Load Torque | [Nm] | *1 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 |
| Nominal Input Speed | [rpm] | *2 | 1500 | 1500 | 1500 | 1500 | 1500 | 1500 | 1500 |
| Maximum Input Speed | [rpm] | *2 | 3000 | 3000 | 3000 | 3000 | 3000 | 3000 | 3000 |
| Reflected Inertia (Single) | [kg-m2x10-4] | *3 | – | – | – | – | – | – | – |
| Reflected Inertia (≤ Ø14) | [kg-m2x10-4] | *3 | 12.565 | 13.165 | 12.225 | 12.055 | 12.665 | 11.405 | 11.905 |
| Reflected Inertia (≤ Ø19) | [kg-m2x10-4] | *3 | 21.355 | 21.955 | 21.015 | 20.845 | 21.455 | 20.185 | 20.695 |
| Reflected Inertia (≤ Ø28) | [kg-m2x10-4] | *3 | 26.175 | 26.775 | 25.835 | 25.665 | 26.275 | 25.015 | 25.515 |
| Reflected Inertia (≤ Ø38) | [kg-m2x10-4] | *3 | – | – | – | – | – | – | – |
| Backlash | [arc-min] | – | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Angular Transmission Accuracy | [arc-min] | – | ≤ 1.5 | ≤ 1.5 | ≤ 1.5 | ≤ 1.5 | ≤ 1.5 | ≤ 1.5 | ≤ 1.5 |
| Angular Repeatability Accuracy | [arc-min] | – | ±0.15 | ±0.15 | ±0.15 | ±0.15 | ±0.15 | ±0.15 | ±0.15 |
| Surface Runout | [µm (max)] | – | 20 | 20 | 20 | 20 | 20 | 20 | 20 |
| Weight | [kg] | – | 419 | 419 | 419 | 419 | 419 | 419 | 419 |
| Maximum Axial Load | [N] | – | 38051 | 38051 | 38051 | 38051 | 38051 | 38051 | 38051 |
| Maximum Radial Load | [N] | – | 11165 | 11165 | 11165 | 11165 | 11165 | 11165 | 11165 |
| Maximum Tilting Moment Load | [Nm] | – | 2478.6 | 2478.6 | 2478.6 | 2478.6 | 2478.6 | 2478.6 | 2478.6 |
| 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 | 4006 | 4006 | 4006 | 4006 | 4006 | 4006 | 4006 | 4006 |
| Acceleration Torque | [Nm] | – | 6072 | 6072 | 6072 | 6072 | 6072 | 6072 | 6072 | 6072 |
| No Load Torque | [Nm] | *1 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 |
| Nominal Input Speed | [rpm] | *2 | 1500 | 1500 | 1500 | 1500 | 1500 | 1500 | 1500 | 1500 |
| Maximum Input Speed | [rpm] | *2 | 3000 | 3000 | 3000 | 3000 | 3000 | 3000 | 3000 | 3000 |
| Reflected Inertia (Single) | [kg-m2x10-4] | *3 | – | – | – | – | – | – | – | – |
| Reflected Inertia (≤ Ø14) | [kg-m2x10-4] | *3 | 11.315 | 11.835 | 11.275 | 11.255 | 11.235 | 11.225 | 11.225 | 11.215 |
| Reflected Inertia (≤ Ø19) | [kg-m2x10-4] | *3 | 20.105 | 20.625 | 20.065 | 20.035 | 20.025 | 20.015 | 20.005 | 20.005 |
| Reflected Inertia (≤ Ø28) | [kg-m2x10-4] | *3 | 24.925 | 25.445 | 24.885 | 24.855 | 24.845 | 24.835 | 24.825 | 24.825 |
| Reflected Inertia (≤ Ø38) | [kg-m2x10-4] | *3 | – | – | – | – | – | – | – | – |
| Backlash | [arc-min] | – | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Angular Transmission Accuracy | [arc-min] | – | ≤ 1.5 | ≤ 1.5 | ≤ 1.5 | ≤ 1.5 | ≤ 1.5 | ≤ 1.5 | ≤ 1.5 | ≤ 1.5 |
| Angular Repeatability Accuracy | [arc-min] | – | ±0.15 | ±0.15 | ±0.15 | ±0.15 | ±0.15 | ±0.15 | ±0.15 | ±0.15 |
| Surface Runout | [µm (max)] | – | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 |
| Weight | [kg] | – | 419 | 419 | 419 | 419 | 419 | 419 | 419 | 419 |
| Maximum Axial Load | [N] | – | 38051 | 38051 | 38051 | 38051 | 38051 | 38051 | 38051 | 38051 |
| Maximum Radial Load | [N] | – | 11165 | 11165 | 11165 | 11165 | 11165 | 11165 | 11165 | 11165 |
| Maximum Tilting Moment Load | [Nm] | – | 2478.6 | 2478.6 | 2478.6 | 2478.6 | 2478.6 | 2478.6 | 2478.6 | 2478.6 |
| 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
