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German SEW R77DRN90L4 Helical Inline Gearmotor | 1.5kW 420Nm IE3 Industrial Drive

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German SEW R77DRN90L4 Helical Inline Gearmotor | 1.5kW 420Nm IE3 Industrial Drive
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Features
Specifications
Efficiency: IE2 To IE4
Insulationclass: Class F, Class H
Efficiencyclass: IE2, IE3, IE4
Framesize: IEC Frame 63 To 355
Startingmethod: Direct On Line (DOL), Star-Delta
Speed: 750 RPM To 3600 RPM
Highlight:

SEW helical inline gearmotor 1.5kW

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industrial gearbox 420Nm torque

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IE3 drive motor with warranty
Basic Infomation
Brand Name: SEW
Model Number: R77DRN90L4
Payment & Shipping Terms
Delivery Time: 5-7 days
Payment Terms: T/T
Supply Ability: 10000 pcs
Product Description

German SEW R77DRN90L4 Helical Inline Gearmotor


1. Product Overview

R77DRN90L4 is an original German SEW‑EURODRIVE R‑series coaxial helical inline gearmotor, rated 1.5kW with 420Nm output torque. It integrates a DRN90L4 IE3 premium‑efficiency 4‑pole motor with a compact R77 three‑stage hardened helical gear unit. Designed for light‑to‑medium heavy duty industrial applications, it features high efficiency, low noise, compact footprint, and excellent reliability for continuous operation. 100% genuine German quality with full international certifications.

2. Technical Parameters


Item Specification
Brand SEW‑EURODRIVE (Germany)
Full Model R77DRN90L4
Product Type Helical Inline Gearmotor (Coaxial)
Gearbox Series R77 (3‑stage helical gear)
Motor Model DRN90L4
Rated Power 1.5kW (2 HP)
Poles / Phase 4‑Pole / 3‑Phase
Efficiency Class IE3 (Premium Efficiency)
Input Speed 1450 rpm @ 50Hz
Gear Ratio Range i = 3.33 ~ 197.37
Output Speed 0.7 ~ 435 rpm
Rated Output Torque 420 Nm
Max Output Torque Up to 820 Nm
Working Voltage 380~415V AC, 50Hz
Optional Voltage 460V AC, 60Hz
Transmission Efficiency 94% ~ 97%
Protection Class IP54
Insulation Class Class F (155°C)
Cooling Method TEFC (Totally Enclosed Fan Cooled)
Duty Cycle S1 Continuous Duty
Housing Material High‑strength Cast Iron
Gear Material Forged Alloy Steel, Hardened & Ground
Mounting Type Foot‑mounted (B3) / Flange‑mounted (B5)
Noise Level ≤72 dB(A)
Overall Weight Approx. 65 ~ 70 kg
Certification CE, RoHS, IEC60034, ISO 9001

3. Model Interpretation

  • R = R‑series coaxial helical gearbox
  • 77 = Gearbox frame size
  • DRN = IE3 high‑efficiency three‑phase motor
  • 90L = Motor frame size
  • 4 = 4‑pole (1450 rpm)

4. Key Features

  1. IE3 Premium Efficiency: Reduces energy consumption by up to 15% vs. IE1/IE2; ideal for long‑hour operation.
  2. High Torque Compact Design: 420Nm in a small frame; saves installation space and cost.
  3. Hardened Helical Gears: Smooth, low‑backlash operation; ≤72 dB(A) quiet.
  4. Robust Cast Iron Housing: High rigidity, good vibration damping, long service life.
  5. Wide Speed/Torque Range: Multiple ratios available for diverse process requirements.
  6. IP54 Protection: Dust‑proof and splash‑proof; suitable for harsh industrial environments.
  7. Easy Installation & Maintenance: Standard mounting dimensions; modular design for quick service.
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