SEW R27DRN71M4 Helical Inline Gearmotor
Brand: SEW-Eurodrive | Series: R-Series / RX-Series (Helical Inline)
The SEW R27DRN71M4 is a highly efficient, compact inline helical gearmotor engineered for light-to-medium duty applications requiring fine speed gradation, high mechanical efficiency, and long operational service life[cite: 25]. Featuring robust thermal stability and versatile mounting styles (foot-mounted R27/RX57, B5/B14 flange RF27/RXF57, and solid shaft), it is widely utilized across conveyor systems, packaging machinery, food processing equipment, and factory automation drives[cite: 25].
Technical Specifications
| Model / Part Number | R27DRN71M4[cite: 25] |
|---|---|
| Brand / Manufacturer | SEW-Eurodrive[cite: 25] |
| Gear Unit Type | R Series (Helical Gear Unit, Inline Output Shaft)[cite: 25] |
| Motor Type | DRN71M4 (AC Squirrel-Cage Motor, IE3 Premium)[cite: 25] |
| Rated Motor Power (kW) | 0.37 kW (Standard)[cite: 25] |
| Output Speed / Ratio | Customizable via gearbox options (Contact for ratio details)[cite: 25] |
| Mounting Position | Universal / Foot-mounted, B5/B14 Flange Mounted[cite: 25] |
Documentation & Resources
SEW R27 Series Modular Configuration Matrix
Full-range modular assembly guide for SEW-Eurodrive Size 27 multi-stage and Size 57 single-stage helical 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 |
|---|---|---|---|
| R27 (Foot-Mounted Multi-Stage)[cite: 25] | Size 27[cite: 25] | DRN Series (IE3 Premium: 63MS4 to 90L4 / 0.18 kW - 1.5 kW)[cite: 25] | /BE (Fail-Safe Disc Brake) |
| RF27 (B5 / B14 Flange Mounted)[cite: 25] | Size 27[cite: 25] | DRS Series (IE1 Standard Efficiency)[cite: 25] | /TF (PTC Thermistor Thermal Protection) |
| RX57 (Single-Stage Foot Mounted)[cite: 25] | Size 57 (RX Stage)[cite: 25] | DT Series (Legacy Retrofit Motors: DT56 to DT90)[cite: 25] | /TH (Thermostat Switch Control) |
| RXF57 (Single-Stage Flange Mounted)[cite: 25] | Size 57 (RX Stage)[cite: 25] | DFT / DFV Series (ATEX Explosion-Proof Executions)[cite: 25] | /RS (Mechanical Backstop / Anti-Runback) |
| R27 / RF27 (Servomotor Adaptations)[cite: 25] | Size 27[cite: 25] | CT / CV 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, DT80, DT90) installed on R27 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 | 0.12 kW[cite: 25] | Direct 1-to-1 flange & shaft match on R27 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] | Direct replacement on R27 and RF27 gear units. Standard R27 pairing. |
| DT80K4 / DT80N4[cite: 25] | IE1 / Standard Efficiency[cite: 25] | DRN80MK4 / DRN80M4 IE3 Upgrade[cite: 25] | 0.55 kW - 0.75 kW[cite: 25] | Identical shaft centerline height & mounting pattern. Brake options BE1/BE2. |
| DT90S4 / DT90L4[cite: 25] | IE1 / Standard Efficiency[cite: 25] | DRN90S4 / DRN90L4 IE3 Upgrade[cite: 25] | 1.1 kW - 1.5 kW[cite: 25] | Maximum power capacity pairing for R27 series. Drop-in replacement[cite: 25]. |
Expert Selection & Retrofit Engineering Notes
We specialize in providing complete drive packages and technical replacement solutions for the entire SEW-Eurodrive R27 series[cite: 25]. Whether you require a foot-mounted unit (R27 / RX57)[cite: 25], B5/B14 flange output (RF27 / RXF57)[cite: 25], or precision servomotor coupling, all mechanical designs can be supplied pre-assembled with state-of-the-art IE3 DRN series motors (DRN63MS4 to DRN90L4)[cite: 25].
When retrofitting an existing application featuring an obsolete DT56, DT63, DT71, DT80, or DT90 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.
When retrofitting an existing application featuring an obsolete DT56, DT63, DT71, DT80, or DT90 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
- R27 DRN63MS4 (0.18 kW)[cite: 25]
- R27 DRN63M4 (0.25 kW)[cite: 25]
- R27 DRN71MS4 (0.37 kW)[cite: 25]
- R27 DRN71M4 (0.55 kW)[cite: 25]
- R27 DRN80M4 (0.75 kW)[cite: 25]
- R27 DRN90S4 (1.1 kW)[cite: 25]
- R27 DRN90L4 (1.5 kW)[cite: 25]
- RF27 DRN71M4 (0.55 kW)[cite: 25]
- RF27 DRN80M4 (0.75 kW)[cite: 25]
- RF27 DRN90L4 (1.5 kW)[cite: 25]
- RX57 DRN71M4 (0.55 kW)[cite: 25]
- RX57 DRN80M4 (0.75 kW)[cite: 25]
- RX57 DRN90L4 (1.5 kW)[cite: 25]
- RXF57 DRN80M4 (0.75 kW)[cite: 25]
- RXF57 DRN90L4 (1.5 kW)[cite: 25]
- R27 DT71D4 (DT Replacement)[cite: 25]
- R27 DT80N4 (DT Replacement)[cite: 25]
- R27 DT90L4 (DT Replacement)[cite: 25]
- RF27 DT80N4 (DT Replacement)[cite: 25]
- RX57 DT90L4 (DT Replacement)[cite: 25]
