SEW W20DRN71M4 SPIROPLAN® Right-Angle Gearmotor
The SEW W20DRN71M4 is a compact, high-efficiency right-angle gearmotor driven by SEW's patented SPIROPLAN® steel-on-steel spiral meshing drive technology[cite: 25]. Built with a high-strength, lightweight die-cast aluminum housing, the W20 provides higher torque performance and greater efficiency than standard size-10 units while maintaining quiet, wear-free power delivery[cite: 25]. Featuring flexible mounting arrangements (foot, B5/B14 flange, solid shaft, hollow shaft with keyway, and TorqLOC® clamping system)[cite: 25], it is widely utilized across material handling conveyors, rotary indexing tables, packaging equipment, and compact factory automation lines[cite: 25].
Technical Specifications
| Model / Part Number | W20DRN71M4[cite: 25] |
|---|---|
| Brand / Manufacturer | SEW-Eurodrive[cite: 25] |
| Gear Unit Type | W Series (SPIROPLAN® Right-Angle Gear Unit)[cite: 25] |
| Motor Type | DRN71M4 (AC Squirrel-Cage Motor, IE3 Premium)[cite: 25] |
| Rated Motor Power (kW) | 0.55 kW (Standard)[cite: 25] |
| Output Speed / Ratio | Customizable via gearbox options (Contact for ratio details)[cite: 25] |
| Mounting & Shaft Form | Foot-mounted, Flange B5/B14, Solid Shaft, Hollow Shaft with Keyway/TorqLOC®[cite: 25] |
Documentation & Resources
SEW W20 Series Modular Configuration Matrix
Full-range modular assembly guide for SEW-Eurodrive Size 20 SPIROPLAN® right-angle gearboxes[cite: 25]. 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 |
|---|---|---|---|
| W20 (Foot-Mounted Solid Shaft)[cite: 25] | Size 20[cite: 25] | DRN Series (IE3 Premium: 63MS4 to 71M4 / 0.18 kW - 0.55 kW)[cite: 25] | /BE (Fail-Safe Disc Brake) |
| WA20 (Hollow Shaft with Keyway)[cite: 25] | Size 20[cite: 25] | DRS Series (IE1 Standard Efficiency)[cite: 25] | /TF (PTC Thermistor Thermal Protection) |
| WF20 / WAF20 (B5 Flange Output)[cite: 25] | Size 20[cite: 25] | DT Series (Legacy Retrofit Motors: DT56 to DT71)[cite: 25] | /TH (Thermostat Switch Control) |
| WAZ20 (B14 Face Flange Output)[cite: 25] | Size 20[cite: 25] | DFT Series (ATEX Explosion-Proof Executions)[cite: 25] | /RS (Mechanical Backstop / Anti-Runback) |
| WT20 (Keyless TorqLOC® Assembly)[cite: 25] | Size 20[cite: 25] | CT Series (Inverter-Duty Servo Drives)[cite: 25] | /V (Forced Cooling Fan Attachment) |
Legacy SEW Motor Replacement & IE3 DRN Upgrade Guide
Obsolete SEW motor ranges (DT56, DT63, DT71) installed on W20 gearboxes can be seamlessly replaced with current IE3 Premium Efficiency DRN motors[cite: 25]. 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: 25] | IE1 / Standard Efficiency[cite: 25] | DRN63MS4 IE3 Upgrade | 0.09 kW - 0.12 kW[cite: 25] | Direct 1-to-1 flange & shaft match on W20 gearboxes. Lower energy loss. |
| DT56L4 / DT63S4[cite: 25] | IE1 / Standard Efficiency[cite: 25] | DRN63MS4 IE3 Upgrade | 0.18 kW[cite: 25] | Identical mounting dimensions; direct drop-in replacement. |
| DT63K4 / DT63L4[cite: 25] | IE1 / Standard Efficiency[cite: 25] | DRN63M4 IE3 Upgrade[cite: 25] | 0.25 kW[cite: 25] | Flange & shaft dimensions identical. Check terminal box position. |
| DT71D4 / DT71C4[cite: 25] | IE1 / Standard Efficiency[cite: 25] | DRN71MS4 / DRN71M4 IE3 Upgrade[cite: 25] | 0.37 kW - 0.55 kW[cite: 25] | Maximum power capacity pairing for W20 series. Drop-in replacement unit[cite: 25]. |
Expert Selection & Retrofit Engineering Notes
When retrofitting an existing application featuring an obsolete DT56, DT63, or DT71 motor[cite: 25], 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
- W20 DRN63MS4 (0.18 kW)[cite: 25]
- W20 DRN63M4 (0.25 kW)[cite: 25]
- W20 DRN71MS4 (0.37 kW)[cite: 25]
- W20 DRN71M4 (0.55 kW)[cite: 25]
- WA20 DRN63M4 (0.25 kW)[cite: 25]
- WA20 DRN71M4 (0.55 kW)[cite: 25]
- WF20 DRN71MS4 (0.37 kW)[cite: 25]
- WF20 DRN71M4 (0.55 kW)[cite: 25]
- WAF20 DRN71M4 (0.55 kW)[cite: 25]
- WAZ20 DRN71M4 (0.55 kW)[cite: 25]
- WT20 DRN71MS4 (0.37 kW)[cite: 25]
- WT20 DRN71M4 (0.55 kW)[cite: 25]
- W20 DT63L4 (DT Replacement)[cite: 25]
- W20 DT71D4 (DT Replacement)[cite: 25]
- WA20 DT71D4 (DT Replacement)[cite: 25]
- WF20 DT71D4 (DT Replacement)[cite: 25]
- WAF20 DT71D4 (DT Replacement)[cite: 25]
- WAZ20 DT63L4 (DT Replacement)[cite: 25]
- WT20 DT71D4 (DT Replacement)[cite: 25]
- WT20 DT63L4 (DT Replacement)[cite: 25]
