SEW-Eurodrive R57 AMS213/215 Industrial Helical Gear Unit

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SEW-Eurodrive R57 AMS213/215 Industrial Helical Gear Unit

The SEW-Eurodrive R57 AMS213/215 is primarily used to reduce motor speed and multiply output torque in heavy-duty industrial machinery. Because electric motors spin very fast but lack the raw twisting force (torque) needed to move heavy objects, this unit sits between the motor and the machine to provide the necessary mechanical power.

Specs:

Gearbox Performance Specs (R57 Frame Size):

• Maximum Output Torque: Up to 450 Nm (approx. 3,980 lb-in) maximum limit for the gear teeth
• Gearbox Design: 2-stage or 3-stage multi-stage inline helical speed reducer
• Available Ratios (i): Ranging finely from 4.39:1 up to 186.89:1 (Common stock ratios include 5.82:1 variant at BDIExpress)
• Efficiency: Typically ≥ 96% for a 2-stage configuration, generating very low heat during continuous operational runs
• Lubrication Capacity: Varies between 0.8 to 1.6 Liters (0.21 to 0.42 US gallons) based on whether it is mounted horizontally (M1) or vertically (M4)

Motor Adapter Interface Specs (AMS213/215):

• Input Standard: Built specifically to match NEMA standard motor frames
• Compatible Motor Sizes: Fits NEMA 213T and 215T frame electric motors
• Input Shaft Bore Hole:1.375 inches (34.925 mm) with standard keyway
• Maximum Permissible Input Power: Typically matches up to 7.5 HP (5.5 kW) or 10 HP (7.5 kW) electric motors spinning at standard industrial speeds (1750 RPM)
• Max Permissible Backstop Torque: Rated up to 500 Nm if equipped with an integrated backstop (RS option)

Physical Output Shaft Dimensions:

• Output Shaft Diameter:1.375 inches (35 mm metric versions are optional depending on region)
• Output Shaft Length:2.76 inches (70 mm)
• Housing Material: High-grade, vibration-dampening grey cast iron
• Mounting Styles: Available as foot-mounted (Standard R57) or flange-mounted (RF57)