S Series Reducers
S series reducers, also known as helical gear reducers, feature compact structure, high transmission efficiency and strong load-bearing capacity. Complying with international standards, they suit motors of various powers, widely applied in machinery, metallurgy, logistics for stable speed reduction and torque enhancement.
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Estimated Delivery Date: Mar 06-Mar 06
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S Series Reducers
SEW S series reducers, officially named helical-worm gear units, are high-performance transmission devices renowned for their integrated design, reliability, and versatility. As a flagship product of SEW-EURODRIVE, this series combines helical gear and worm gear transmission, achieving far higher efficiency than single worm gear reducers, making it an ideal choice for both general industrial scenarios and potentially explosive environments.
The core advantage of the S series lies in its optimized structural design. With 7 specifications available, each can be independently adjusted for torque and speed, perfectly adapting to spaces with limited installation room. Its modular design allows seamless combination with various explosion-proof motors via AM motor adapters, supporting motor power ranging from 0.12kW to 22kW and delivering an output torque of 92Nm to 4,000Nm. The integrated helical-worm structure enables linear power transmission, effectively suppressing torque pulses and ensuring ultra-low noise operation.
Compliant with EU ATEX directives (2014/34/EU) and certified for equipment group II, category 2 (variant II2GD), the S series meets international standards including EN13463-1/-5/-8. It holds multiple certifications such as EAC (formerly GOST-R), with protection types "c" (safety structure) and "k" (liquid immersion protection). The robust cast iron housing, high-quality oil seals, and high-temperature resistant lubricants enhance durability and sealing performance.
Widely applied in materials handling, metallurgy, chemical, petroleum, and theater equipment, it drives conveyors, rotary tables, presses, and hoists reliably. Supporting foot, flange (B5/B14), horizontal, and vertical installation, it offers solid or hollow shaft options with keyway, shrink disk, or TorqLOC® connections. With excellent heat dissipation, vibration absorption, and long service life, the S series provides efficient and stable transmission solutions for diverse industrial needs globally.
SEW Reducer S Series Models, Weights and Motor Combinations
Note: The weights refer to the reducer body (aluminum housing for small models, HT250 cast iron for large ones) and may vary with additional modules (e.g., BMG disc brakes, HF high-reliability configuration). Motor combinations comply with SEW standard helical-worm drive matching, covering IE2-IE4 efficiency classes, suitable for compact installation scenarios with low noise and stable transmission, such as packaging machinery, conveyors and textile equipment. The torque range is 10N·m to 4890N·m, and the output speed ranges from 0.12r/min to 397r/min.
1. S Series (Foot-mounted Solid Shaft, Helical-Worm Reducer)
| Model | Weight | Motor Combination (Power Range) |
|---|---|---|
| S37 | 8.2kg | DR63S4, DR63L4 (0.12-0.25kW); DRS71S4, DRS71M4 (0.18-0.55kW); DT71C4 (0.37kW), IP55 protection class, suitable for light-load scenarios |
| S47 | 13.5kg | DRS80M4-DRS90S4 (0.75-1.1kW); DT90S4, DT90L4 (1.1-1.5kW); DRE90S4 (1.1kW), optional BMG brake for emergency stop |
| S57 | 21.8kg | DRS90L4-DRS100L4 (1.5-2.2kW); DV100M4 (2.2kW); DRE100L4 (2.2kW), transmission efficiency ≥93%, supports frequency conversion |
| S67 | 34.6kg | DRS100L4-DRS112M4 (2.2-4.0kW); DV112M4 (4.0kW); DRN112M4 (4.0kW), enhanced bearing for impact load resistance |
| S77 | 52.3kg | DV100L4-DV132M4 (3.0-7.5kW); DRS132M4 (7.5kW); DRE132M4 (7.5kW), torque capacity up to 1200N·m |
| S87 | 86.7kg | DV132M4-DV160S4 (7.5-11kW); DRS160S4 (11kW); DRE160S4 (11kW), HF configuration optional for harsh environments |
| S97 | 135.4kg | DV160M4-DV180M4 (15-18.5kW); DRS180M4 (18.5kW); built-in PT100 temperature sensor, overload protection |
2. SA Series (Foot-mounted Hollow Shaft, Helical-Worm Reducer)
| Model | Weight | Motor Combination (Power Range) |
|---|---|---|
| SA67 | 36.8kg | Same as S67 (2.2-4.0kW), hollow shaft design with single key connection, direct shaft mounting |
| SA77 | 55.1kg | DV100L4-DV132M4 (3.0-7.5kW); DRS132M4 (7.5kW); optional spline connection, service life ≥20000 hours |
| SA87 | 89.2kg | Same as S87 (7.5-11kW), compatible with M1-M6 mounting positions, vertical/horizontal installation |
| SA97 | 138.9kg | Same as S97 (15-18.5kW), hollow shaft with胀紧盘 connection for quick assembly/disassembly |
3. SF Series (Flange-mounted, Helical-Worm Reducer)
| Model | Weight | Motor Combination (Power Range) |
|---|---|---|
| SF37 | 9.0kg | Same as S37 (0.12-0.55kW), B5/B14 flange compatible, compact structure for limited space |
| SF47 | 14.3kg | Same as S47 (0.75-1.5kW), enhanced flange rigidity, suitable for heavy-load flange mounting |
| SF57 | 23.5kg | Same as S57 (1.5-2.2kW), low noise design with helical-worm meshing, noise ≤75dB |
| SF67 | 36.4kg | Same as S67 (2.2-4.0kW), flange with positioning pin for high installation accuracy |
4. SAF Series (Flange Hollow Shaft with Clamping Hub, Helical-Worm Reducer)
| Model | Weight | Motor Combination (Power Range) |
|---|---|---|
| SAF77 | 57.8kg | DV112M4-DV132M4 (4.0-7.5kW); DRS132M4 (7.5kW); compatible with SIL2/PLd safety standard, for lifting equipment |
| SAF87 | 92.5kg | DV132M4-DV160S4 (7.5-11kW); DRE160S4 (11kW); clamping hub + flange design, stable transmission |
| SAF97 | 142.6kg | DV160M4-DV180M4 (15-18.5kW); DRS180M4 (18.5kW); BMG brake optional, response time ≤0.3 seconds |
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