SEW W37DRN90S4 SPIROPLAN® Right-Angle Gearmotor
The SEW W37DRN90S4 represents the highest torque-capacity size in SEW's compact SPIROPLAN® right-angle gearmotor line[cite: 20]. Featuring patented wear-free steel-on-steel spiral bevel gearing enclosed in a lightweight die-cast aluminum housing, the W37 offers outstanding mechanical efficiency and long-term reliability[cite: 20]. With versatile mounting forms (foot, B5/B14 flange, solid shaft, hollow shaft with keyway, and TorqLOC® clamping system)[cite: 20], it is extensively deployed in material handling conveyors, rotary indexing tables, packaging machinery, and automated assembly drives[cite: 20].
Technical Specifications
| Model / Part Number | W37DRN90S4[cite: 20] |
|---|---|
| Brand / Manufacturer | SEW-Eurodrive[cite: 20] |
| Gear Unit Type | W Series (SPIROPLAN® Right-Angle Gear Unit)[cite: 20] |
| Motor Type | DRN90S4 (AC Squirrel-Cage Motor, IE3 Premium)[cite: 20] |
| Rated Motor Power (kW) | 1.1 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/TorqLOC®[cite: 20] |
Documentation & Resources
SEW W37 Series Modular Configuration Matrix
Full-range modular assembly guide for SEW-Eurodrive Size 37 SPIROPLAN® right-angle 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 |
|---|---|---|---|
| W37 (Foot-Mounted Solid Shaft)[cite: 20] | Size 37[cite: 20] | DRN Series (IE3 Premium: 63MS4 to 100LS4 / 0.18 kW - 2.2 kW)[cite: 20] | /BE (Fail-Safe Disc Brake) |
| WA37 (Hollow Shaft with Keyway)[cite: 20] | Size 37[cite: 20] | DRS Series (IE1 Standard Efficiency)[cite: 20] | /TF (PTC Thermistor Thermal Protection) |
| WF37 / WAF37 (B5 Flange Output)[cite: 20] | Size 37[cite: 20] | DT / DV Series (Legacy Retrofit Motors: DT56 to DV100)[cite: 20] | /TH (Thermostat Switch Control) |
| WAZ37 (B14 Face Flange Output)[cite: 20] | Size 37[cite: 20] | DFT / DFV Series (ATEX Explosion-Proof Executions)[cite: 20] | /RS (Mechanical Backstop / Anti-Runback) |
| WT37 (Keyless TorqLOC® Assembly)[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, DV100) installed on W37 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 / DT63S4[cite: 20] | IE1 / Standard Efficiency[cite: 20] | DRN63MS4 IE3 Upgrade | 0.09 kW - 0.18 kW[cite: 20] | Direct 1-to-1 flange & shaft match on W37 gearboxes. Lower energy loss. |
| DT63K4 / DT63L4[cite: 20] | IE1 / Standard Efficiency[cite: 20] | DRN63M4 IE3 Upgrade[cite: 20] | 0.25 kW[cite: 20] | Identical mounting dimensions; direct drop-in replacement. |
| DT71D4 / DT71C4[cite: 20] | IE1 / Standard Efficiency[cite: 20] | DRN71MS4 / DRN71M4 IE3 Upgrade[cite: 20] | 0.37 kW - 0.55 kW[cite: 20] | Flange & shaft dimensions identical. Check terminal box position. |
| 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 W37 pairing[cite: 20]. |
| DT90S4 / DT90L4 / DV100M4[cite: 20] | IE1 / IE2 Efficiency[cite: 20] | DRN90S4 / DRN90L4 / DRN100LS4 IE3 Upgrade[cite: 20] | 1.1 kW - 2.2 kW[cite: 20] | Maximum power capacity pairing for W37 series. Drop-in replacement unit[cite: 20]. |
Expert Selection & Retrofit Engineering Notes
When retrofitting an existing application featuring an obsolete DT56, DT63, DT71, DT80, DT90, or DV100 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
- W37 DRN63M4 (0.25 kW)[cite: 20]
- W37 DRN71M4 (0.55 kW)[cite: 20]
- W37 DRN80M4 (0.75 kW)[cite: 20]
- W37 DRN90S4 (1.1 kW)[cite: 20]
- W37 DRN90L4 (1.5 kW)[cite: 20]
- W37 DRN100LS4 (2.2 kW)[cite: 20]
- WA37 DRN80M4 (0.75 kW)[cite: 20]
- WA37 DRN90S4 (1.1 kW)[cite: 20]
- WA37 DRN90L4 (1.5 kW)[cite: 20]
- WF37 DRN90S4 (1.1 kW)[cite: 20]
- WAF37 DRN90S4 (1.1 kW)[cite: 20]
- WAF37 DRN100LS4 (2.2 kW)[cite: 20]
- WAZ37 DRN80M4 (0.75 kW)[cite: 20]
- WT37 DRN90S4 (1.1 kW)[cite: 20]
- WT37 DRN100LS4 (2.2 kW)[cite: 20]
- W37 DT80N4 (DT Replacement)[cite: 20]
- W37 DT90S4 (DT Replacement)[cite: 20]
- WA37 DT90S4 (DT Replacement)[cite: 20]
- WAF37 DT90L4 (DT Replacement)[cite: 20]
- WT37 DV100M4 (DV Replacement)[cite: 20]
