ECOSTEP 34S90-0950, high torque NEMA 34 servo motor
Technical specifications
| Flange | 86 mm |
| Max. DC link voltage | 150 VDC |
| Maximum speed | 2000 rpm |
| Peak torque | 11.6 Nm |
| Stall torque | 9.5 Nm |
Overview
The ECOSTEP 34S90-0950 is a high-performance rotary servo motor in the ECOSTEP 34S series, designed for demanding axes that require very high torque in a compact NEMA 34 (86 mm) flange. With a motor length of approximately 190 mm, a 14 mm shaft, and a mass of around 5.5 kg, it delivers strong drive capacity in a manageable footprint.
At a 150 V DC link, the motor provides approximately 4 Nm rated torque at 500 min⁻¹ and 209 W rated power, with up to 11.6 Nm peak torque available when required. This design targets applications where direct drive concepts, high torque density, and dynamic servo behavior are needed in one axis. Standard protection is IP40, with an IP65 option for more demanding environments (shaft gland remains IP40). The ECOSTEP 34S platform supports application-specific customization with mechanical options such as holding brakes, shaft/flange variants, and protection upgrades. Customer-specific winding adjustments are available from small quantities. A wide encoder range and predefined connector/cable options complete the integration with the ECOVARIO 214 servo amplifier.
Advantages
The ECOSTEP 34S90-0950 offers very high-torque NEMA 34 servo motor performance for compact but heavy-duty servo axes.
- When high torque at low speed and precise control are required, ECOSTEP motors provide a cost-efficient alternative to traditional servo motors.
- Compact and powerful: Up to 11.6 Nm peak and 4 Nm rated torque in a NEMA 34 frame enable strong drive capacity in limited space.
- Direct drive capable: The available torque can allow direct drive concepts without a gearbox in many applications. This reduces external gear components and simplifies mechanics.
- High dynamic servo operation: Genuine servo behavior supports rapid acceleration, precise speed control, and accurate positioning for demanding motion profiles.
- Adaptable to the application: Mechanical options, encoder variants, and possible winding adjustments allow you to align the motor with your torque-speed requirement instead of designing the mechanics around a fixed motor.
Where it fits
Use this high-torque NEMA 34 servo motor when you need compact but powerful axes with precise positioning.
- High-torque rotary or linear axes in assembly and handling systems
- Packaging, indexing, and format adjustment axes with increased load or inertia
- Direct drive rotary tables or positioning units in special machinery
- Vertical or inclined axes that benefit from high torque and an optional holding brake
- Upgrades of existing NEMA 34 driven machines where more torque and servo dynamics are required
These are application examples and do not represent specific approvals.
Interfaces
The ECOSTEP 34S90-0950 is designed for operation with DC link voltages up to 170 V DC (rated point at 150 V DC) and is optimized for use with the ECOVARIO 214 servo amplifier.
- Encoder options:
- Incremental: Standard resolutions from 8,000 to 160,000 increments per revolution
- SinCos: 1000 periods per revolution with programmable resolution
- Absolute: BiSS-B interface up to 17-bit single-turn and 12-bit multi-turn (single-turn resolutions up to 19-bit and individual resolutions up to 256,000 inc/rev possible on request)
- Mechanical and protection options: Optional 5 Nm holding brake (increases motor length and mass), shaft with key or long shaft, bearing flange variants, and IP65 housing option (shaft gland remains IP40).
- Connection and cabling: Mating connector sets with M23 motor and encoder connectors and a dedicated brake connector. Pre-assembled motor, brake, and encoder cables support reliable wiring and help shorten commissioning in the drive system.
