Bosch SM35/70-T | Permanent Magnet Synchronous Motor (PMSM)

Parameter Name Parameter Value
​Product Model ​Bosch Rexroth SM35/70-T
​Manufacturer Bosch Rexroth AG
​Product Type Permanent Magnet Synchronous Motor (PMSM)
​Nominal Torque ​70 Nm (S1 duty)
​Peak Torque ​210 Nm (300% overload)
​Nominal Speed 1500 rpm
​Max Speed 4000 rpm
​Rotor Inertia 0.028 kg·m²
​Voltage Range 480 V AC (±10%)
​Protection Class IP65 (Front)/IP54 (Connector)
​Feedback System 20-bit Hiperface DSL® absolute encoder
​Thermal Sensor KTY84-130 (Integrated, -T variant)
​Pole Pairs 4
​Frame Size 240 mm (Flange 35)
​Cooling Method Surface cooling (IC416)
​Ambient Temperature 0°C to +50°C (Deratable to +70°C)
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Description

Bosch Rexroth IndraDyn S SM35/70-T Synchronous Servo Motor Specification

Product Overview

The ​Bosch Rexroth IndraDyn S SM35/70-T is a high-torque synchronous servo motor engineered for precision motion control in demanding industrial automation. Designed for robotics, packaging machinery, and CNC equipment, this motor delivers exceptional dynamic response and energy efficiency through its permanent magnet technology and integrated cooling architecture. The ​Bosch Rexroth SM35/70-T features a ruggedized IP65 housing that withstands dust, moisture, and aggressive washdown procedures, while its advanced thermal management ensures continuous operation in high-duty-cycle applications. Key enhancements include multi-turn absolute feedback, configurable braking systems, and compatibility with Rexroth’s IndraDrive ML/Si platforms for seamless integration into Industry 4.0 ecosystems.

Technical Specifications

Parameter Name Parameter Value
​Product Model ​Bosch Rexroth SM35/70-T
​Manufacturer Bosch Rexroth AG
​Product Type Permanent Magnet Synchronous Motor (PMSM)
​Nominal Torque ​70 Nm (S1 duty)
​Peak Torque ​210 Nm (300% overload)
​Nominal Speed 1500 rpm
​Max Speed 4000 rpm
​Rotor Inertia 0.028 kg·m²
​Voltage Range 480 V AC (±10%)
​Protection Class IP65 (Front)/IP54 (Connector)
​Feedback System 20-bit Hiperface DSL® absolute encoder
​Thermal Sensor KTY84-130 (Integrated, -T variant)
​Pole Pairs 4
​Frame Size 240 mm (Flange 35)
​Cooling Method Surface cooling (IC416)
​Ambient Temperature 0°C to +50°C (Deratable to +70°C)
​Weight 82 kg

Key Functional Capabilities

Optimized Drive Performance:
Delivers instantaneous torque response (±0.5% ripple) for precision positioning in printing/packaging lines. Auto-adaptive commutation compensates for magnetic saturation at high loads. Multi-turn absolute encoder eliminates homing routines after power loss.

Industrial Robustness:
Sealed housing withstands high-pressure washdowns (IP65) in food/pharma plants. Vacuum-pressure impregnated windings resist humidity and chemical exposure. Optional ​**-IB** suffix adds spring-applied brake (80 Nm holding torque).

Advanced Thermal Management:
Integrated KTY84 temperature sensors enable drive-side thermal protection curves. Surface cooling fins increase heat dissipation by 40% versus traditional designs, sustaining 150% continuous overload at 40°C ambient.

Smart Connectivity:
Hiperface DSL® encoder outputs motor temperature, vibration signatures, and bearing health diagnostics. Direct plug-and-play compatibility with:

  • ​IndraDrive Mi/Mc drives via DRIVE-CLiQ®
  • ​IndraDrive CS18C cabinets via MCR-HD35 connectors
  • PROFINET/EtherCAT integration through Rexroth gateways

Targeted Application Domains

Flexible Packaging Machinery:

  • Rotary sealing jaws requiring torque synchronization (±0.1% tolerance)
  • Web tension control in filling machines (Modbus torque override commands)

Bosch SM35/70-T

Automated Material Handling:

  • Palletizing robots with vertical axis braking (SM35/70-T-IB variant)
  • AS/RS conveyor drives needing 24/7 duty cycles

Metal Processing:

  • CNC press feed systems with jerk-limited motion profiles
  • Laser cutting positioners demanding <5 arc-sec repeatability

Electric Mobility Testing:

  • Dynamometer emulation for e-axle validation
  • Regenerative energy recovery via IndraDrive Si inverters

Renewable Energy:

  • Solar tracker azimuth drives in desert environments (IP65 dust protection)

Complementary System Components

Product Assurance Commitment

Bosch Rexroth provides a 36-month warranty with lifetime technical support. Each ​Bosch Rexroth SM35/70-T undergoes:

  • Full-load thermal cycling validation (-30°C to +120°C)
  • Hiperface DSL® alignment certification per IEC 61800-9
  • Vibration testing to 20g RMS (IEC 60068-2-64)
  • IP65 pressure jet verification (14.5 PSI/30min)
    Global services include:
  • 48-hour emergency motor replacement
  • Free Rexroth DriveTuner® software for thermal modeling
  • SIL 3/PL e functional safety documentation packages
  • Predictive maintenance training through Rexroth Academy
  • 10+ years of guaranteed spare parts

Note: Derate torque output above 40°C per thermal curves. For vertical installations, specify -IB brake option. Maintain <0.05° angular misalignment using Rexroth bellows couplings. Hiperface DSL® cables limited to 100m without repeaters.

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