SEW R Series Helical Gearmotors
The SEW-EURODRIVE R Series coaxial helical gearmotors deliver an optimal power-to-weight ratio and versatile mounting options for inline drive solutions. Renowned for their ultra-high efficiency, robust construction, and finely stepped gear ratios, the R series covers a torque range from 50 Nm up to 18,000 Nm. Whether you require multi-stage coaxial drives, single-stage high-speed units (RX Series), or foot/flange combinations, SEW R series gearmotors represent the gold standard for conveyors, mixers, pumps, and general materials handling worldwide.
Available R Series Variants (Mounting & Shaft Options)
The R series helical gear unit family can be customized into various structural mounting options to seamlessly integrate with your machinery. Specify your variant when requesting a quote (e.g., RF107, RM97, or RX77):
- R / R..R: Foot-mounted solid shaft helical gear unit.
- RF / RF..R: Flange-mounted solid shaft version (B5 flange).
- RM / RM..R: Flange-mounted version with extended bearing hub designed specifically for agitators and mixers.
- RX / RXF: Single-stage helical gear units optimized for high output speeds and extreme operating efficiency.
R Series Base Models & Technical Specifications
| Base Model | Max. Torque (Nm) | Gear Ratio (i) | Power Range (kW) | Details |
|---|---|---|---|---|
| R 07 | Up to 50 | 3.37 – 33.00 | 0.12 – 0.75 | Data Card |
| R 17 | Up to 85 | 3.83 – 82.00 | 0.12 – 1.50 | Data Card |
| R 27 | Up to 130 | 3.37 – 135.00 | 0.12 – 3.00 | Data Card |
| R 37 | Up to 200 | 3.41 – 134.83 | 0.12 – 3.00 | Data Card |
| R 47 | Up to 300 | 3.83 – 176.88 | 0.12 – 5.50 | Data Card |
| R 57 | Up to 450 | 3.41 – 217.41 | 0.12 – 7.50 | Data Card |
| R 67 | Up to 600 | 4.31 – 216.28 | 0.12 – 11.00 | Data Card |
| R 77 | Up to 820 | 3.97 – 195.08 | 0.25 – 15.00 | Data Card |
| R 87 | Up to 1,550 | 4.50 – 222.40 | 0.55 – 30.00 | Data Card |
| R 97 | Up to 3,000 | 4.30 – 216.84 | 1.10 – 45.00 | Data Card |
| R 107 | Up to 4,300 | 4.43 – 251.15 | 2.20 – 55.00 | Data Card |
| R 127 | Up to 8,200 | 5.30 – 275.00 | 11.00 – 90.00 | Data Card |
| R 137 | Up to 8,000 | 3.97 – 222.60 | 3.00 – 90.00 | Data Card |
| R 147 | Up to 13,000 | 4.74 – 163.57 | 5.50 – 160.00 | Data Card |
| R 167 | Up to 18,000 | 4.83 – 229.71 | 11.00 – 200.00 | Data Card |
Technical FAQs: SEW R Series
The SEW RX Series (RX57 to RX107) consists of single-stage coaxial helical gear units engineered for high output speeds. They offer extremely high mechanical efficiency and compact dimensions, making them ideal for high-speed pumps, fans, and compact inline drives.
The SEW RM Series is a specialized variant of the R series featuring an extended bearing hub. This reinforced output flange housing is engineered to absorb high radial and axial loads generated by mixer shafts without risking casing deflection or seal degradation.
To ensure complete interchangeability with your existing setup, simply take a clear photograph of the SEW nameplate (containing the 10-digit Serial Number). Our engineering team will decode the exact gear ratio, mounting position (M1-M6), motor frame size, and flange dimensions to supply a 100% direct-fit replacement.
