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EJP 038 Frame
The EJP series is ideal for demanding applications requiring high efficiency, torsional rigidity and zero backlash. The EJP is part of our modular design platform, which means it can be mounted to any servomotor manufacturer with ease.
Our internal design captures both sides of the gear tooth to completely eliminate backlash and guarantee it for the life of the product. Exact reduction ratios allow for simplified servo tuning. Ratios 5:1 through 60:1 are available in a single stage, resulting in a more compact design. The face mounting option gives customers the ability to directly attach components such as tables, pinion gears and timing belt pulleys, eliminating the need for couplings.
Technical Data
EJP 038 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] | – | 35 | – | – | – | – | 46 | 49 | 47 | – | 46 | 42 | 42 | 38 |
| Maximum Acceleration Torque | [Nm] | – | 46 | – | – | – | – | 59 | 61 | 60 | – | 56 | 52 | 52 | 47 |
| Emergency Stop Torque | [Nm] | – | 105 | – | – | – | – | 138 | 147 | 141 | – | 138 | 126 | 126 | 114 |
| No Load Running Torque | [Nm] | *1 | 0.51 | 0.51 | 0.51 | 0.51 | 0.51 | 0.51 | 0.51 | 0.51 | 0.51 | 0.51 | 0.51 | 0.51 | 0.51 |
| 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] | – | 6,000 | 6,000 | 6,000 | 6,000 | 6,000 | 6,000 | 6,000 | 6,000 | 6,000 | 6,000 | 6,000 | 6,000 | 6,000 |
| Maximum Radial Load | [N] | *2 | 3,110 | 3,110 | 3,110 | 3,110 | 3,110 | 3,110 | 3,110 | 3,110 | 3,110 | 3,110 | 3,110 | 3,110 | 3,110 |
| Maximum Axial Load | [N] | *3 | 1,780 | 1,780 | 1,780 | 1,780 | 1,780 | 1,780 | 1,780 | 1,780 | 1,780 | 1,780 | 1,780 | 1,780 | 1,780 |
| Moment of Inertia (≤ Ø14) | [kgcm2] | – | 0.75 | – | – | – | – | 0.59 | 0.56 | 0.54 | – | 0.54 | 0.53 | 0.53 | 0.53 |
| Moment of Inertia (≤ Ø19) | [kgcm2] | – | 0.95 | – | – | – | – | 0.79 | 0.76 | 0.74 | – | 0.74 | 0.73 | 0.73 | 0.73 |
| Moment of Inertia (≤ Ø28) | [kgcm2] | – | 2.13 | – | – | – | – | 1.97 | 1.94 | 1.92 | – | 1.92 | 1.91 | 1,91 | 1.91 |
| Efficiency | [%] | *4 | 88 | – | – | – | – | 86 | 84 | 81 | – | 76 | 72 | 69 | 66 |
| Torsional Rigidity | [Nm/arcmin] | – | 3.8 | 3.8 | 3.8 | 3.8 | 3.8 | 3.8 | 3.8 | 3.8 | 3.8 | 3.8 | 3.8 | 3.8 | 3.8 |
| Max Torsional Backlash (Standard) | [Arc-min] | – | ≤ 8 | ≤ 8 | ≤ 8 | ≤ 8 | ≤ 8 | ≤ 8 | ≤ 8 | ≤ 8 | ≤ 8 | ≤ 8 | ≤ 8 | ≤ 8 | ≤ 8 |
| Noise Level | dB [A] | *5 | ≤ 73 | ≤ 73 | ≤ 73 | ≤ 73 | ≤ 73 | ≤ 73 | ≤ 73 | ≤ 73 | ≤ 73 | ≤ 73 | ≤ 73 | ≤ 73 | ≤ 73 |
| 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 | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 |
- 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
EJP 038 Dimensions – Hollow Output Shaft
| Frame Size | Unit | Note | EJP 038 |
| L1 | [mm] | – | 1 |
| L2 | [mm] | – | 4 |
| L3 | [mm] | – | 39 |
| L4 | [mm] | – | 51 |
| L5 | [mm] | – | 112 |
| L6 | [mm] | – | 32 |
| L7 | [mm] | – | 42 |
| L8 | [mm] | – | 118 |
| L9 | [mm] | – | 45 |
| L10 | [mm] | – | 73 |
| L11 | [mm] | – | 38.1 |
| L12 | [mm] | – | 34.5 |
| L13 | [mm] | *1 | – |
| L14 | [mm} | *2 | 63 |
| L15 | [mm] | *3 | 96.5 – 106.5 |
| L16 | [mm] | – | 18.5 |
| L17 | [mm] | 50.5 | |
| L18 | [mm] | 28.5 | |
| L19 | [mm] | 8 | |
| D1 (h8) | [mm] | – | Ø 64 |
| D2 (h7) | [mm] | – | Ø 25 |
| T1 | [mm] | – | 4xM8X12 |
| T2 | [mm] | – | 4XM6x9 |
| V1~V9 | [mm] | *4 | Motor attachment dimensions are made to fit your servo motor. |
EJP 038 Dimensions – Solid Output Shaft
| Frame Size | Unit | Note | EJP 038 |
| L1 | [mm] | – | 22 |
| L2 | [mm] | – | 90 |
| L3 | [mm] | – | 30 |
| L4 | [mm] | – | 4 |
| L5 | [mm] | – | 31 |
| L6 | [mm] | – | 39 |
| L7 | [mm] | – | 51 |
| L8 | [mm] | – | 35 |
| L9 | [mm] | – | 137 |
| L10 | [mm] | – | 32 |
| L11 | [mm] | – | 42 |
| L12 | [mm] | – | 118 |
| L13 | [mm] | – | 45 |
| L14 | [mm} | – | 73 |
| L15 | [mm] | – | 38.1 |
| L16 | [mm] | – | 34.5 |
| L17 | [mm] | *1 | – |
| L18 | [mm] | *2 | 63 |
| L19 | [mm] | *3 | 96.5 – 106.5 |
| L20 | [mm] | – | 18.5 |
| L21 | [mm] | – | 50.5 |
| L22 | [mm] | – | 22.5 |
| L23 | [mm] | – | 6 |
| D1 (h8) | [mm] | – | Ø 64 |
| D2 (k6) | [mm] | – | Ø 20 |
| T1 | [mm] | – | 4xM8x12 |
| T2 | [mm] | – | 4xM6x9 |
| V1 ~ V9 | [mm] | *4 | Motor attachment dimensions are made to fit your servo motor. |
EJP 038 Dimensions – Flange Output
| Frame Size | Unit | Note | EJP 038 |
| L1 | [mm] | – | 1 |
| L2 | [mm] | – | 4 |
| L3 | [mm] | – | 6 |
| L4 | [mm] | – | 39 |
| L5 | [mm] | – | 51 |
| L6 | [mm] | – | 10 |
| L7 | [mm] | – | 117 |
| L8 | [mm] | – | 32 |
| L9 | [mm] | – | 42 |
| L10 | [mm] | – | 118 |
| L11 | [mm] | – | 45 |
| L12 | [mm] | – | 73 |
| L13 | [mm] | – | 38.1 |
| L14 | [mm} | – | 34.5 |
| L15 | *1 | – | |
| L16 | [mm] | *2 | 63 |
| L17 | [mm] | *3 | 96.5 – 106.5 |
| L18 | [mm] | – | 18.5 |
| L19 | [mm] | 50.5 | |
| D1 (h8) | [mm] | – | Ø 64 |
| D2 (h11) | [mm] | – | Ø 40 |
| D3 (h9) | Ø 5 x 10 | ||
| D4 | [mm] | – | Ø 28 |
| D5 (h7) | [mm] | *4 | Ø 16 |
| T1 | [mm] | – | 4xM8x12 |
| T2 | [mm] | – | 4xM6x9 |
| T3 | [mm] | *5 | 4xM6X12 |
| V1 ~ V9 | [mm] | *6 | Motor attachment dimensions are made to fit your servo motor. |
EJP 038 Dimensions – Hollow Output with Shrink Disk
| Frame Size | Unit | Note | EJP 038 |
| L1 | [mm] | – | 1 |
| L2 | [mm] | – | 4 |
| L3 | [mm] | – | 25 |
| L4 | [mm] | – | 39 |
| L5 | [mm] | – | 51 |
| L6 | [mm] | – | 29 |
| L7 | [mm] | – | 136 |
| L8 | [mm] | – | 32 |
| L9 | [mm] | – | 42 |
| L10 | [mm] | – | 118 |
| L11 | [mm] | – | 45 |
| L12 | [mm] | – | 73 |
| L13 | [mm] | – | 38.1 |
| L14 | [mm] | – | 34.5 |
| L15 | [mm] | *1 | – |
| L16 | [mm] | *2 | 63 |
| L17 | [mm] | *3 | 96.5 – 106.5 |
| L18 | [mm] | – | 18.5 |
| L19 | [mm] | – | 50.5 |
| D1 (h8) | [mm] | – | Ø 64 |
| D2 (h6) | [mm] | – | Ø 25 |
| T1 | [mm] | – | 4xM8X12 |
| T2 | [mm] | – | 4xM6x9 |
| V1 ~ V9 | [mm] | *4 | Motor attachment dimensions are made to fit your servo motor. |