Request Quote
Request a quote from Nidec Drive Technology America Corporation.
EJL 125 Frame
The EJL is available in 3 backlash levels, as low as 1 arc-min, to satisfy a variety of applications. Output options include single and dual shaft, hollow bore with keyway, hollow bore with shrink disc and robotic ISO flange. EJL is available in ratios as high as 90:1 in a single stage and maximum acceleration torque as high as 6250Nm.
Hardened and ground worms and bronze alloy wheels deliver high torque, smooth operation, and superior shock load absorption. Oversized taper roller bearings accommodate high radial forces. A unique 3 bearing arrangement maintains proper worm bearing preload over all allowable temperature ranges.
Technical Data
EJL 125 Frame Size, 1 Stage Specifications
| Ratio | Unit | Note | 5.125 | 7.2 | 10.25 | 15.25 | 20.5 | 29.5 | 45 | 60 | 90 |
| Nominal Output Torque | [Nm] | *1 | 716 | 742 | 725 | 625 | 877 | 731 | 952 | 815 | 680 |
| Maximum Acceleration Torque | [Nm] | *1 | 1,181 | 1,224 | 1,196 | 1.031 | 1,447 | 1,206 | 1,571 | 1,345 | 1,122 |
| Emergency Stop Torque | [Nm] | – | 3,767 | 3,767 | 3,767 | 3,342 | 3,767 | 3,295 | 3,767 | 2,937 | 2,502 |
| No Load Running Torque | [Nm] | *2 | 4.80 | 4.23 | 3.76 | 3.21 | 2.84 | 2.90 | 2.27 | 2.66 | 2.74 |
| Nominal Input Speed | [rpm] | *1 | 3,000 | 3,000 | 3,000 | 3,000 | 3,000 | 3,000 | 3,000 | 3,000 | 3,000 |
| Max Continuous Input Speed | [rpm] | *1 | 4,000 | 4,000 | 4,000 | 4,000 | 4,000 | 4,000 | 4,000 | 4,000 | 4,000 |
| Maximum Cyclic Input Speed | [rpm] | – | 6,000 | 6,000 | 6,000 | 6,000 | 6,000 | 6,000 | 6,000 | 6,000 | 6,000 |
| Maximum Radial Load | [N] | *3 | 26,000 | 26,000 | 26,000 | 26,000 | 26,000 | 26,000 | 26,000 | 26,000 | 26,000 |
| Maximum Axial Load | [N] | *4 | 22,000 | 22,000 | 22,000 | 22,000 | 22,000 | 22,000 | 22,000 | 22,000 | 22,000 |
| Moment of Inertia | [kgcm2] | – | 50 | 38 | 30.5 | 25 | 23.4 | 23.15 | 21 | 20 | 19 |
| Efficiency | [%] | *5 | 95 | 95 | 94 | 91 | 89 | 85 | 80 | 74 | 64 |
| Torsional Rigidity | [Nm/arcmin] | – | 180 | 180 | 180 | 180 | 180 | 180 | 180 | 180 | 180 |
| Max Torsional Backlash (Standard) | [Arc-min] | – | ≤ 5 | ≤ 5 | ≤ 5 | ≤ 5 | ≤ 5 | ≤ 5 | ≤ 5 | ≤ 5 | ≤ 5 |
| Max Torsional Backlash (Precision) | [Arc-min] | ≤ 0.5 | ≤ 0.5 | ≤ 0.5 | ≤ 0.5 | ≤ 0.5 | ≤ 0.5 | ≤ 0.5 | ≤ 0.5 | ≤ 0.5 | |
| Noise Level | dB [A] | *6 | 80 | 80 | 80 | 80 | 80 | 80 | 80 | 80 | 80 |
| Ambient Temperature | [°C] | – | -30 to +40 | -30 to +40 | -30 to +40 | -30 to +40 | -30 to +40 | -30 to +40 | -30 to +40 | -30 to +40 | -30 to +40 |
| Permitted Housing Temperature | [°C] | – | +80 | +80 | +80 | +80 | +80 | +80 | +80 | +80 | +80 |
| Protection Class | – | – | IP65 | IP65 | IP65 | IP65 | IP65 | IP65 | IP65 | IP65 | IP65 |
| Lubrication | – | – | Synthetic Oil | Synthetic Oil | Synthetic Oil | Synthetic Oil | Synthetic Oil | Synthetic Oil | Synthetic Oil | Synthetic Oil | Synthetic Oil |
| Service Life | [Hours] | – | 25,000 | 25,000 | 25,000 | 25,000 | 25,000 | 25,000 | 25,000 | 25,000 | 25,000 |
| Weight | [kg] | *7 | 97.5 | 97.5 | 97.5 | 97.5 | 97.5 | 97.5 | 97.5 | 97.5 | 97.5 |
- Higher output torque is available at reduced speed. Contact us if you need to operate outside of these parameters
- Input torque with no load applied to the output shaft at 2,000 rpm
- The maximum radial load the gearbox can accept
- The maximum axial load the gearbox can accept
- The efficiency at the nominal output torque and input speed rating
- Measured with no load applied to the output shaft at 3,000 rpm and 1 meter distance
- Weight may vary slightly between models
EJL 125 Dimensions – Shrink Disc Hollow Output Shaft
| Frame Size | Unit | EJL 125 |
| L1 | [mm] | 163 |
| L2 | [mm] | 135 |
| L3 | [mm] | 214 |
| L4 | [mm] | 270 |
| L5 | [mm] | 107 |
| L6 | [mm] | 125 |
| L7 | [mm] | 302 |
| L8 | [mm] | 274 |
| L9 | [mm] | 180 |
| L10 | [mm] | 4 |
| L11 | [mm] | 117 |
| L12 | [mm] | 157 |
| L13 | [mm] | 360 |
| L14 | [mm} | 135 |
| L15 | [mm] | 225 |
| L16 | [mm] | 160 |
| L17 | [mm] | 70 |
| L18 | [mm] | 107 |
| D1 | [mm] | 145 |
| D2 (h7) | [mm] | 65 |
| D3 | [mm] | 80 |
| D4 | [mm] | 185 |
| T1 | [mm] | M16 |
| T2 | [mm] | 17 |
| T3 | [mm] | 6-M16 |
| V1~V6 | [mm] | Motor attachment dimensions are made to fit your servo motor. |
EJL 125 Dimensions – Solid Output Shaft – Single Only
| Frame Size | Unit | EJL 125 |
| L1 | [mm] | 163 |
| L2 | [mm] | 135 |
| L3 | [mm] | 214 |
| L4 | [mm] | 270 |
| L5 | [mm] | 107 |
| L6 | [mm] | 125 |
| L7 | [mm] | 302 |
| L8 | [mm] | 348 |
| L9 | [mm] | 180 |
| L10 | [mm] | 4 |
| L11 | [mm] | 111 |
| L12 | [mm] | 233 |
| L13 | [mm] | 360 |
| L14 | [mm} | 135 |
| L15 | [mm] | 225 |
| L16 (j7) | [mm] | 160 |
| L17 | [mm] | 70 |
| L18 | [mm] | 107 |
| L19 | [mm] | 111 |
| L20 | [mm] | 67.5 |
| L21 | [mm] | 20.0 |
| D1 (h6) | [mm] | 75 |
| D2 | [mm] | 185 |
| T1 | [mm] | M16 |
| T2 | [mm] | 17 |
| T3 | [mm] | M16 |
| T4 | [mm] | M20 |
| V1 ~ V6 | [mm] | Motor attachment dimensions are made to fit your servo motor. |