SEW S37DRN80M4 Helical-Worm Right-Angle Gearmotor
The SEW S37DRN80M4 is a compact, highly cost-effective right-angle helical-worm gearmotor engineered for smooth, quiet operation, high reliability, and long operational service life[cite: 20]. Combining a helical primary stage with a high-grade worm stage, the S37 offers superior mechanical efficiency compared to standalone worm gearboxes[cite: 20]. Available in versatile mounting styles (foot-mounted S37, hollow shaft SA37, B5 flange SF37/SAF37, B14 flange SAZ37, shrink disc SH37, and TorqLOC® clamping system ST37)[cite: 20], it is widely utilized across light-to-medium conveyors, packaging machinery, stage equipment, and general automation drives[cite: 20].
Technical Specifications
| Model / Part Number | S37DRN80M4[cite: 20] |
|---|---|
| Brand / Manufacturer | SEW-Eurodrive[cite: 20] |
| Gear Unit Type | S Series (Helical-Worm Gear Unit, Right-Angle Output)[cite: 20] |
| Motor Type | DRN80M4 (AC Squirrel-Cage Motor, IE3 Premium)[cite: 20] |
| Rated Motor Power (kW) | 0.75 kW (Standard)[cite: 20] |
| Output Speed / Ratio | Customizable via gearbox options (Contact for ratio details)[cite: 20] |
| Mounting & Shaft Form | Foot-mounted, Flange B5/B14, Solid Shaft, Hollow Shaft with Keyway/Shrink Disc/TorqLOC®[cite: 20] |
Documentation & Resources
SEW S37 Series Modular Configuration Matrix
Full-range modular assembly guide for SEW-Eurodrive Size 37 helical-worm gearboxes[cite: 20]. Review supported mechanical mountings, current IE1-IE4 motor pairings, and factory protection options:
| Gear Unit Mounting / Layout Design | Frame Size | Matched Motor Series & Powers | Optional Factory Accessories |
|---|---|---|---|
| S37 (Foot-Mounted Solid Shaft)[cite: 20] | Size 37[cite: 20] | DRN Series (IE3 Premium: 63MS4 to 90L4 / 0.18 kW - 1.5 kW)[cite: 20] | /BE (Fail-Safe Disc Brake) |
| SA37 (Hollow Shaft with Keyway)[cite: 20] | Size 37[cite: 20] | DRS Series (IE1 Standard Efficiency)[cite: 20] | /TF (PTC Thermistor Thermal Protection) |
| SF37 / SAF37 (B5 Flange Output)[cite: 20] | Size 37[cite: 20] | DT Series (Legacy Retrofit Motors: DT56 to DT90)[cite: 20] | /TH (Thermostat Switch Control) |
| SAZ37 / SHZ37 (B14 Face Flange)[cite: 20] | Size 37[cite: 20] | DFT / DFV Series (ATEX Explosion-Proof Executions)[cite: 20] | /RS (Mechanical Backstop / Anti-Runback) |
| SH37 / ST37 (Shrink Disc / TorqLOC®)[cite: 20] | Size 37[cite: 20] | CT / CV Series (Inverter-Duty Servo Drives)[cite: 20] | /V (Forced Cooling Fan Attachment) |
Legacy SEW Motor Replacement & IE3 DRN Upgrade Guide
Obsolete SEW motor ranges (DT56, DT63, DT71, DT80, DT90) installed on S37 gearboxes can be seamlessly replaced with current IE3 Premium Efficiency DRN motors[cite: 20]. Refer to the cross-reference mapping below for 1-to-1 retrofitting:
| Legacy Motor Code (Obsolete) | Efficiency Level | Current IE3 Replacement Motor | Rated Power (kW) | Mechanical Compatibility & Retrofit Notes |
|---|---|---|---|---|
| DT56S4 / DT56M4[cite: 20] | IE1 / Standard Efficiency[cite: 20] | DRN63MS4 IE3 Upgrade | 0.12 kW[cite: 20] | Direct 1-to-1 flange & shaft match on S37 gearboxes. Lower energy loss. |
| DT56L4 / DT63S4[cite: 20] | IE1 / Standard Efficiency[cite: 20] | DRN63MS4 IE3 Upgrade | 0.18 kW[cite: 20] | Identical mounting dimensions; direct drop-in replacement. |
| DT63K4 / DT63L4[cite: 20] | IE1 / Standard Efficiency[cite: 20] | DRN63M4 IE3 Upgrade[cite: 20] | 0.25 kW[cite: 20] | Flange & shaft dimensions identical. Check terminal box position. |
| DT71D4 / DT71C4[cite: 20] | IE1 / Standard Efficiency[cite: 20] | DRN71MS4 / DRN71M4 IE3 Upgrade[cite: 20] | 0.37 kW - 0.55 kW[cite: 20] | Direct replacement on S37 and SA37 gear units. Smooth right-angle drive. |
| DT80K4 / DT80N4[cite: 20] | IE1 / Standard Efficiency[cite: 20] | DRN80MK4 / DRN80M4 IE3 Upgrade[cite: 20] | 0.55 kW - 0.75 kW[cite: 20] | Identical shaft centerline height & mounting pattern. Standard S37 pairing[cite: 20]. |
| DT90S4 / DT90L4[cite: 20] | IE1 / Standard Efficiency[cite: 20] | DRN90S4 / DRN90L4 IE3 Upgrade[cite: 20] | 1.1 kW - 1.5 kW[cite: 20] | Maximum power capacity pairing for S37 series. Drop-in replacement[cite: 20]. |
Expert Selection & Retrofit Engineering Notes
When retrofitting an existing application featuring an obsolete DT56, DT63, DT71, DT80, or DT90 motor[cite: 20], upgrading to an IE3 DRN motor ensures complete dimensional interchangeability while substantially reducing operating temperatures and energy costs. Simply send us your existing SEW serial number or nameplate code (including options like BE brake, TF thermistor, or RS backstop), and our engineering team will provide a 100% compliant replacement specification and quotation.
Core Benchmark Model Standard Configurations
- S37 DRN63MS4 (0.18 kW)[cite: 20]
- S37 DRN63M4 (0.25 kW)[cite: 20]
- S37 DRN71MS4 (0.37 kW)[cite: 20]
- S37 DRN71M4 (0.55 kW)[cite: 20]
- S37 DRN80M4 (0.75 kW)[cite: 20]
- S37 DRN90S4 (1.1 kW)[cite: 20]
- S37 DRN90L4 (1.5 kW)[cite: 20]
- SA37 DRN71M4 (0.55 kW)[cite: 20]
- SA37 DRN80M4 (0.75 kW)[cite: 20]
- SA37 DRN90L4 (1.5 kW)[cite: 20]
- SF37 DRN80M4 (0.75 kW)[cite: 20]
- SAF37 DRN80M4 (0.75 kW)[cite: 20]
- SAF37 DRN90L4 (1.5 kW)[cite: 20]
- SAZ37 DRN80M4 (0.75 kW)[cite: 20]
- SH37 DRN80M4 (0.75 kW)[cite: 20]
- ST37 DRN90L4 (1.5 kW)[cite: 20]
- S37 DT80N4 (DT Replacement)[cite: 20]
- SA37 DT80N4 (DT Replacement)[cite: 20]
- SAF37 DT90L4 (DT Replacement)[cite: 20]
- SAZ37 DT71D4 (DT Replacement)[cite: 20]
