Request Quote
Request a quote from Nidec Drive Technology America Corporation.
EJS 044 Frame
The EJS Standard adapters are available for easy mounting to both, servo and AC induction motors. Dual bearings on the input shaft ensure proper alignment of the motor and gearhead. This design allows the gearhead to be mounted in any orientation.
Smooth, rounded surfaces help eliminate free-standing water and prevent bacteria growth. IP69K protection combined with 316 stainless steel allows this product to stand up to the harshest production environments. The EJS is the only servo grade right angle gearhead in the market that has been certified 3A, NSF and EHEDG.
Technical Data
EJS 044 Frame Size, 1 Stage Specifications
| Ratio | Unit | Note | 5 | 7.5 | 10 | 15 | 20 | 25 | 30 | 40 | 50 | 60 |
| Nominal Output Torque | [Nm] | – | 58 | 72 | 81 | 92 | 91 | 90 | 92 | 88 | 85 | 82 |
| Maximum Acceleration Torque | [Nm] | – | 78 | 97 | 108 | 122 | 120 | 96 | 120 | 115 | 111 | 106 |
| Emergency Stop Torque | [Nm] | – | 116 | 144 | 162 | 183 | 181 | 179 | 184 | 176 | 170 | 163 |
| No Load Running Torque | [Nm] | *1 | 0.68 | 0.68 | 0.68 | 0.68 | 0.68 | 0.68 | 0.68 | 0.68 | 0.68 | 0.68 |
| Nominal Input Speed | [rpm] | – | 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] | – | 3,000 | 3,000 | 3,000 | 3,000 | 3,000 | 3,000 | 3,000 | 3,000 | 3,000 | 3,000 |
| Maximum Cyclic Input Speed | [rpm] | – | 3,000 | 3,000 | 3,000 | 3,000 | 3,000 | 3,000 | 3,000 | 3,000 | 3,000 | 3,000 |
| Maximum Radial Load | [N] | *2 | 4,895 | 4,895 | 4,895 | 4,895 | 4,895 | 4,895 | 4,895 | 4,895 | 4,895 | 4,895 |
| Maximum Axial Load | [N] | *3 | 4,895 | 4,895 | 4,895 | 4,895 | 4,895 | 4,895 | 4,895 | 4,895 | 4,895 | 4,895 |
| Moment of Inertia | [kgcm2] | – | 1.36 | 1.16 | 1.08 | 1.03 | 1.01 | 1.01 | 1.00 | 1.00 | 1.00 | 0.99 |
| Efficiency | [%] | *4 | 92 | 91 | 90 | 88 | 85 | 84 | 80 | 76 | 73 | 70 |
| Torsional Rigidity | [Nm/arcmin] | – | 7.6 | 7.6 | 7.6 | 7.6 | 7.6 | 7.6 | 7.6 | 7.6 | 7.6 | 7.6 |
| Max Torsional Backlash (Standard) | [Arc-min] | – | ≤ 20 | ≤ 20 | ≤ 20 | ≤ 20 | ≤ 20 | ≤ 20 | ≤ 20 | ≤ 20 | ≤ 20 | ≤ 20 |
| Max Torsional Backlash (Low) | [Arc-min] | – | ≤ 7 | ≤ 7 | ≤ 7 | ≤ 7 | ≤ 7 | ≤ 7 | ≤ 7 | ≤ 7 | ≤ 7 | ≤ 7 |
| Noise Level | dB [A] | *5 | ≤ 75 | ≤ 75 | ≤ 75 | ≤ 75 | ≤ 75 | ≤ 75 | ≤ 75 | ≤ 75 | ≤ 75 | ≤ 75 |
| Ambient Temperature | [°C] | – | -23 ~ 93 | -23 ~ 93 | -23 ~ 93 | -23 ~ 93 | -23 ~ 93 | -23 ~ 93 | -23 ~ 93 | -23 ~ 93 | -23 ~ 93 | -23 ~ 93 |
| Permitted Housing Temperature | [°C] | – | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
| Protection Class | – | – | IP 69K | IP 69K | IP 69K | IP 69K | IP 69K | IP 69K | IP 69K | IP 69K | IP 69K | IP 69K |
| Lubrication | – | – | Synthetic Food Grade Oil | Synthetic Food Grade Oil | Synthetic Food Grade Oil | Synthetic Food Grade Oil | Synthetic Food Grade Oil | Synthetic Food Grade Oil | Synthetic Food Grade Oil | Synthetic Food Grade Oil | Synthetic Food Grade Oil | Synthetic Food Grade Oil |
| Mounting Position | – | Any | Any | Any | Any | Any | Any | Any | Any | Any | Any | |
| Service Life | [Hours] | – | 20,000 | 20,000 | 20,000 | 20,000 | 20,000 | 20,000 | 20,000 | 20,000 | 20,000 | 20,000 |
| Weight | [kg] | *6 | 15.5 | 15.5 | 15.5 | 15.5 | 15.5 | 15.5 | 15.5 | 15.5 | 15.5 | 15.5 |
- 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
EJS 044 Dimensions – Hollow Output Shaft
| Frame Size | Unit | Note | EJS 044 |
| L1 | [mm] | – | 121.7 |
| L2 | [mm] | – | 67.6 |
| L3 | [mm] | – | 62.2 |
| L4 | [mm] | – | 79.8 |
| L5 | [mm] | – | 159.8 |
| L6 | [mm] | – | 34.9 |
| L7 | [mm] | – | 53.1 |
| L8 | [mm] | – | 148.3 |
| L9 | [mm] | – | 52.3 |
| L10 | [mm] | – | 96.0 |
| L11 | [mm] | – | 44.5 |
| L12 | [mm] | – | 78.0 |
| L13 | [mm] | – | 151.9 |
| D1 | [mm} | – | Ø 20 |
| D2 | [mm] | – | Ø 45 |
| Key way N1 | [mm] | – | 6.0×3.0 |
| T1 | [mm] | – | M8X12 |
| T2 | [mm] | – | 5/16-24 |
| E1 | [mm] | – | 123.4 |
| E2 | [mm] | – | 45.5 |
| E3 | [mm] | – | 0.75 |
| Key way N2 | [Inch] | – | 3/16×3/32 |
| V1~V10 | – | – | Motor attachment dimensions are made to fit your servo motor. |
EJS 044 Dimensions – Solid Output Shaft
| Frame Size | Unit | Note | EJS 044 |
| L1 | [mm] | – | 121.7 |
| L2 | [mm] | – | 67.6 |
| L3 | [mm] | – | 62.2 |
| L4 | [mm] | – | 69.9 |
| L5 | [mm] | – | 109.5 |
| L6 | [mm] | – | 181.1 |
| L7 | [mm] | – | 22 |
| L8 | [mm] | – | 7 |
| L9 | [mm] | – | 34.9 |
| L10 | [mm] | – | 53.2 |
| L11 | [mm] | – | 148.3 |
| L12 | [mm] | – | 52.3 |
| L13 | [mm] | – | 90.0 |
| L14 | [mm} | – | 44.5 |
| L15 | [mm] | – | 78.0 |
| L16 | [mm] | – | 151.9 |
| D1 | [mm] | – | Ø 20 |
| Key way N1 | [mm] | – | 6.0×3.0 |
| T1 | [mm] | – | M8x12 |
| E1 | [mm] | – | 123.4 |
| E2 | [mm] | – | 45.5 |
| E3 | [mm] | – | 0.75 |
| Key way N2 | [mm] | – | 3/16×3/32 |
| V1 ~ V9 | – | – | Motor attachment dimensions are made to fit your servo motor. |
EJS 044 Dimensions – Shrink Disc Hollow Output Shaft
| Frame Size | Unit | Note | EJS 044 |
| L1 | [mm] | – | 121.7 |
| L2 | [mm] | – | 67.6 |
| L3 | [mm] | – | 62.2 |
| L4 | [mm] | – | 95.8 |
| L5 | [mm] | – | 164.6 |
| L6 | [mm] | – | 34.9 |
| L7 | [mm] | – | 53.2 |
| L8 | [mm] | – | 148.3 |
| L9 | [mm] | – | 52.3 |
| L10 | [mm] | – | 96.0 |
| L11 | [mm] | – | 44.5 |
| L12 | [mm] | – | 78.0 |
| L13 | [mm] | – | 151.9 |
| D1 | [mm} | – | Ø 25 / Ø 25.008 |
| D2 | [mm] | – | Ø 60 |
| T1 | [mm] | – | M8x12 |
| E1 | [mm] | – | 123.4 |
| E2 | [mm] | – | 45.5 |
| E3 | [mm] | – | 0.75 |
| Key way N2 | [mm] | – | 3/16×3/32 |
| V1 ~ V10 | – | – | Motor attachment dimensions are made to fit your servo motor. |
EJS 044 Dimensions – Optional Mounting Flange
| Frame Size | Unit | Note | EJS 044 |
| L1 | [mm] | – | 121.7 |
| L2 | [mm] | – | 67.6 |
| L3 | [mm] | – | 62.2 |
| L4 | [mm] | – | 79.8 |
| L5 | [mm] | – | 176 |
| L6 | [mm] | – | 3.8 |
| L7 | [mm] | – | 9.7 |
| L8 | [mm] | – | 16.0 |
| L9 | [mm] | – | 34.9 |
| L10 | [mm] | – | 53.2 |
| L11 | [mm] | – | 184.2 |
| L12 | [mm] | – | 35.8 |
| L13 | [mm] | – | 52.3 |
| L14 | [mm] | – | 96 |
| L15 | [mm] | – | 44 |
| L16 | [mm] | – | 78 |
| L17 | [mm] | – | 70 |
| L18 | [mm] | – | 140.5 |
| L19 | [mm] | – | 69.9 |
| L20 | [mm] | – | 109.5 |
| L21 | [mm] | – | 181.1 |
| L22 | [mm] | – | 22 |
| L23 | [mm] | – | 7 |
| L24 | [mm] | – | 17.5 |
| T1 | [mm] | – | M8X12 |
| D1 | [mm] | – | Ø 20 |
| Key way N1 | [mm] | – | 6.0X3.0 |
| T2 | [mm] | – | 5/16-24 |
| D2 | [mm] | – | Ø 20 |
| Key way N2 | [mm] | – | 6.0X3.0 |
| D3 | [mm] | – | Ø 114.3 |
| D4 | [mm] | – | Ø 103.1 |
| D5 | [mm] | – | Ø 149.35 |
| T3 | [mm] | – | 9.2 |
| E1 | [mm] | – | 123.4 |
| E2 | [mm] | – | 45.5 |
| E3 | [mm] | – | 0.75 |
| Key way N3 | [Inch] | – | 3/16X3/32 |
| V1 ~ V10 | – | – | Motor attachment dimensions are made to fit your servo motor. |
EJS 044 Dimensions – Side Mount (w/o Flange Mounting)
| Frame Size | Unit | Note | EJS 044 |
| L1 | [mm] | – | 121.7 |
| L2 | [mm] | – | 67.6 |
| L3 | [mm] | – | 62.2 |
| L4 | [mm] | – | 79.8 |
| L5 | [mm] | – | 159.8 |
| L6 | [mm] | – | 2.5 |
| L7 | [mm] | – | 34.9 |
| L8 | [mm] | – | 53.2 |
| L9 | [mm] | – | 148.3 |
| L10 | [mm] | – | 52.3 |
| L11 | [mm] | – | 96.0 |
| L12 | [mm] | – | 44.5 |
| L13 | [mm] | – | 78.0 |
| L14 | [mm] | – | 151.9 |
| L15 | [mm] | – | 69.9 |
| L16 | [mm] | – | 109.5 |
| L17 | [mm] | – | 181.1 |
| L18 | [mm] | – | 22 |
| L19 | [mm] | – | 7 |
| T1 | [mm] | – | M8X12 |
| D1 | [mm] | – | Ø 20 |
| Key way N1 | [mm] | – | 6.0X3.0 |
| T2 | [mm] | – | 5/16-24 |
| D2 | [mm] | – | Ø 20 |
| Key way N2 | [mm] | – | 6.0X3.0 |
| D3 | [mm] | – | Ø 45 |
| D4 | [mm] | – | Ø 70 |
| D5 | [mm] | – | Ø 85 |
| T3 | [mm] | – | M8X12 |
| E1 | [mm] | – | 123.4 |
| E2 | [mm] | – | 45.5 |
| E3 | [mm] | – | 0.75 |
| Key way N3 | [Inch] | – | 3/16X3/32 |
| V1 ~ V10 | – | – | Motor attachment dimensions are made to fit your servo motor. |