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EJH 020 Frame
The EJH is an ideal fit for machine builders transitioning from mechanical or hydraulic systems to all-electric servo drives. Unlike traditional worm gearhead out on the market, the EJH utilizes a globoidal gear mesh, resulting in 300% shock load capacity and a quiet, smooth-running drive.
With torque capability up to 7800 in. lb. and backlash as low as 6 arc-min, the EJH is well suited for metals, plastics or rubber processing machinery applications requiring a robust, compact solution. NIDEC DTC can customize this product to fit your needs by offering a variety of solid shaft, hollow shaft or shrink disc output mounting options.
Technical Data
EJH 020 Frame Size, 1 Stage Specifications
| Ratio | Unit | Note | 5 | 6 | 7 | 8 | 9 | 10 | 15 | 20 | 25 | 30 | 40 | 50 | 60 |
| Nominal Output Torque | [Nm] | – | 67 | 73 | 78 | 82 | 84 | 86 | 89 | 89 | 88 | 85 | 81 | 78 | 75 |
| Maximum Acceleration Torque | [Nm] | – | 90 | 99 | 105 | 111 | 113 | 115 | 120 | 116 | 116 | 112 | 106 | 102 | 98 |
| Emergency Stop Torque | [Nm] | – | 384 | 407 | 429 | 441 | 441 | 441 | 452 | 418 | 418 | 395 | 362 | 305 | 294 |
| No Load Running Torque | [Nm] | *1 | 1.61 | 1.61 | 1.61 | 1.61 | 1.61 | 1.61 | 1.61 | 1.61 | 1.61 | 1.61 | 1.61 | 1.61 | 1.61 |
| Nominal Input Speed | [rpm] | – | 2,000 | 2,000 | 2,000 | 2,000 | 2,000 | 2,000 | 2,000 | 2,000 | 2,000 | 2,000 | 2,000 | 2,000 | 2,000 |
| Max Continuous Input Speed | [rpm] | – | 4,000 | 4,000 | 4,000 | 4,000 | 4,000 | 4,000 | 4,000 | 4,000 | 4,000 | 4,000 | 4,000 | 4,000 | 4,000 |
| Maximum Cyclic Input Speed | [rpm] | – | 4,000 | 4,000 | 4,000 | 4,000 | 4,000 | 4,000 | 4,000 | 4,000 | 4,000 | 4,000 | 4,000 | 4,000 | 4,000 |
| Maximum Radial Load | [N] | *2 | 6,670 | 6,670 | 6,670 | 6,670 | 6,670 | 6,670 | 6,670 | 6,670 | 6,670 | 6,670 | 6,670 | 6,670 | 6,670 |
| Maximum Axial Load | [N] | *3 | 1,820 | 1,820 | 1,820 | 1,820 | 1,820 | 1,820 | 1,820 | 1,820 | 1,820 | 1,820 | 1,820 | 1,820 | 1,820 |
| Moment of Inertia (≤ Ø14) | [kgcm2] | – | 1.52 | 1.28 | 1.14 | 1.04 | 0.98 | 0.94 | 0.83 | 0.79 | 0.77 | 0.76 | 0.75 | 0.75 | 0.75 |
| Moment of Inertia (≤ Ø19) | [kgcm2] | – | 1.72 | 1.48 | 1.34 | 1.24 | 1.18 | 1.14 | 1.03 | 0.99 | 0.97 | 0.96 | 0.95 | 0.95 | 0.95 |
| Moment of Inertia (≤ Ø28) | [kgcm2] | – | 2.89 | 2.66 | 2.52 | 2.42 | 2.36 | 2.31 | 2.21 | 2.17 | 2.15 | 2.14 | 2.13 | 2.13 | 2.13 |
| Efficiency | [%] | *4 | 92 | 91 | 91 | 91 | 90 | 90 | 88 | 85 | 84 | 80 | 76 | 72 | 70 |
| Torsional Rigidity | [Nm/arcmin] | – | 17.8 | 17.8 | 17.8 | 17.8 | 17.8 | 17.8 | 17.8 | 17.8 | 17.8 | 17.8 | 17.8 | 17.8 | 17.8 |
| Max Torsional Backlash (Standard) | [Arc-min] | – | ≤24 | ≤24 | ≤24 | ≤24 | ≤24 | ≤24 | ≤24 | ≤24 | ≤24 | ≤24 | ≤24 | ≤24 | ≤24 |
| Max Torsional Backlash (Low) | [Arc-min] | – | ≤ 11 | ≤ 11 | ≤ 11 | ≤ 11 | ≤ 11 | ≤ 11 | ≤ 11 | ≤ 11 | ≤ 11 | ≤ 11 | ≤ 11 | ≤ 11 | ≤ 11 |
| Noise Level | dB [A] | *5 | ≤ 75 | ≤ 75 | ≤ 75 | ≤ 75 | ≤ 75 | ≤ 75 | ≤ 75 | ≤ 75 | ≤ 75 | ≤ 75 | ≤ 75 | ≤ 75 | ≤ 75 |
| Ambient Temperature | [°C] | – | -25~100 | -25~100 | -25~100 | -25~100 | -25~100 | -25~100 | -25~100 | -25~100 | -25~100 | -25~100 | -25~100 | -25~100 | -25~100 |
| Permitted Housing Temperature | [°C] | – | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
| Protection Class | – | – | IP65 | IP65 | IP65 | IP65 | 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 | 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 | 25,000 | 25,000 | 25,000 | 25,000 |
| Weight | [kg] | *6 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 |
- Torque at no load applied to the input 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 rating
- Measured with no load applied to the input shaft at 2,000 rpm
- Weight may vary slightly between models
EJH 020 Dimensions – Hollow Output Shaft
| Frame Size | Unit | Note | EJH 020 |
| L1 | [mm] | – | 15.5 |
| L2 | [mm] | – | 2.5 |
| L3 | [mm] | – | 40 |
| L4 | [mm] | – | 51 |
| L5 | [mm] | – | 134 |
| L6 | [mm] | – | 28.5 |
| L7 | [mm] | – | 51 |
| L8 | [mm] | – | 159 |
| L9 | [mm] | – | 63.5 |
| L10 | [mm] | – | 95.5 |
| L11 | [mm] | – | 50.8 |
| L12 | [mm] | – | 73 |
| L13 | [mm] | *1 | 113.5 – 123.5 |
| L14 | [mm} | – | 61 |
| L15 | [mm] | – | 33.5 |
| L16 | [mm] | – | 8 |
| D1 ±0.03 | [mm] | – | Ø 84.73 |
| D2 | [mm] | – | Ø 105 |
| D3 (h7) | [mm] | – | Ø 30 |
| T1 | [mm] | – | 4xM10X15 |
| T2 | [mm] | – | 4XM8 Bolts |
| V1~V9 | [mm] | *2 | Motor attachment dimensions are made to fit your servo motor. |
EJH 020 Dimensions – Solid Output Shaft
| Frame Size | Unit | Note | EJH 020 |
| L1 | [mm] | – | 36 |
| L2 | [mm] | – | 4 |
| L3 | [mm] | – | 57.5 |
| L4 | [mm] | – | 40 |
| L5 | [mm] | – | 54.5 |
| L6 | [mm] | – | 117.5 |
| L7 | [mm] | – | 172 |
| L8 | [mm] | – | 28.5 |
| L9 | [mm] | – | 51 |
| L10 | [mm] | – | 159 |
| L11 | [mm] | – | 63.5 |
| L12 | [mm] | – | 95.5 |
| L13 | [mm] | – | 50.8 |
| L14 | [mm} | – | 73 |
| L15 | [mm] | *1 | 113.5 – 123.5 |
| L16 | [mm] | – | 61 |
| L17 | [mm] | – | 28 |
| L18 | [mm] | – | 8 |
| D1 | [mm] | – | Ø 105 |
| D2 (k6) | [mm] | – | Ø 205 |
| T1 | [mm] | – | 4xM10x15 |
| T2 | [mm] | – | 4xM8 Bolts |
| V1 ~ V9 | [mm] | *2 | Motor attachment dimensions are made to fit your servo motor. |
EJH 020 Dimensions – Hollow Output with Shrink Disk
| Frame Size | Unit | Note | EJH 020 |
| L1 | [mm] | – | 15.5 |
| L2 | [mm] | – | 2.5 |
| L3 | [mm] | – | 41.5 |
| L4 | [mm] | – | 40 |
| L5 | [mm] | – | 51 |
| L6 | [mm] | – | 159.5 |
| L7 | [mm] | – | 28.5 |
| L8 | [mm] | – | 51 |
| L9 | [mm] | – | 159 |
| L10 | [mm] | – | 63.5 |
| L11 | [mm] | – | 95.5 |
| L12 | [mm] | – | 50.8 |
| L13 | [mm] | – | 73 |
| L14 | [mm} | *1 | 113.5 – 123.5 |
| L15 | [mm] | – | 61 |
| D1 ±0.03 | [mm] | – | Ø 84.73 |
| D2 | [mm] | – | Ø 105 |
| D3 (h7) | [mm] | – | Ø 30 |
| T1 | [mm] | – | 4xM10x15 |
| T2 | [mm] | – | 4xM8 Bolts |
| V1 ~ V9 | [mm] | *2 | Motor attachment dimensions are made to fit your servo motor. |
EJH 020 Dimensions – Optional Mounting Flange (*1)
| Frame Size | Unit | Note | EJH 020 |
| L1 | [mm] | – | 28 |
| L2 | [mm] | – | 8 |
| L3 | [mm] | – | 33.5 |
| L4 | [mm] | – | 8 |
| L5 | [mm] | – | 87 |
| L6 | [mm] | – | 31 |
| L7 | [mm] | – | 13 |
| L8 | [mm] | – | 57.5 |
| L9 | [mm] | – | 4 |
| L10 | [mm] | – | 36 |
| L11 | [mm] | – | 4 |
| L12 | [mm] | – | 20 |
| D1 (k6) | [mm] | – | Ø 25 |
| D2 (h7) | [mm] | – | Ø 30 |
| D3 | [mm] | – | Ø 10 |
| D4 | [mm] | – | Ø 178 |
| D5 | [mm] | – | Ø 203 |
| D6 ±0.03 | [mm] | – | Ø 136.55 |