SEW R137DRN250M4 Helical Inline Gearmotor
Brand: SEW-Eurodrive | Series: R-Series / RX-Series (Helical Inline)
The SEW R137DRN250M4 is an ultra heavy-duty, high-capacity inline helical gearmotor designed for the most demanding heavy industrial drive requirements[cite: 25]. Delivering extreme mechanical strength, maximum overhung load tolerance, and high efficiency, it is available in foot-mounted (R137/RX127) and flange-mounted (RF137/RXF127) designs for heavy mining operations, steel manufacturing, cement mills, power station conveyors, and large industrial mixers[cite: 25].
Technical Specifications
| Model / Part Number | R137DRN250M4[cite: 25] |
|---|---|
| Brand / Manufacturer | SEW-Eurodrive[cite: 25] |
| Gear Unit Type | R Series (Helical Gear Unit, Inline Output Shaft)[cite: 25] |
| Motor Type | DRN250M4 (AC Squirrel-Cage Motor, IE3 Premium)[cite: 25] |
| Rated Motor Power (kW) | 55.0 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 R137 Series Modular Configuration Matrix
Full-range modular assembly guide for SEW-Eurodrive Size 137 multi-stage and Size 127 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 |
|---|---|---|---|
| R137 (Foot-Mounted Multi-Stage)[cite: 25] | Size 137[cite: 25] | DRN Series (IE3 Premium: 160M4 to 315S4 / 11.0 kW - 110.0 kW)[cite: 25] | /BE (Fail-Safe Disc Brake) |
| RF137 (B5 / B14 Flange Mounted)[cite: 25] | Size 137[cite: 25] | DRS Series (IE1 Standard Efficiency)[cite: 25] | /TF (PTC Thermistor Thermal Protection) |
| RX127 (Single-Stage Foot Mounted)[cite: 25] | Size 127 (RX Stage)[cite: 25] | DV Series (Legacy Retrofit Motors: DV160 to DV280)[cite: 25] | /TH (Thermostat Switch Control) |
| RXF127 (Single-Stage Flange Mounted)[cite: 25] | Size 127 (RX Stage)[cite: 25] | DFT / DFV Series (ATEX Explosion-Proof Executions)[cite: 25] | /RS (Mechanical Backstop / Anti-Runback) |
| R137 / RF137 (Servomotor Adaptations)[cite: 25] | Size 137[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 (DV160, DV180, DV200, DV225, DV250, DV280) installed on R137 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 |
|---|---|---|---|---|
| DV160M4 / DV160L4[cite: 25] | IE1 / IE2 Efficiency[cite: 25] | DRN160M4 / DRN160L4 IE3 Upgrade[cite: 25] | 11.0 kW - 15.0 kW[cite: 25] | Direct 1-to-1 flange & shaft match on R137 gearboxes. Lower energy loss. |
| DV180M4 / DV180L4[cite: 25] | IE1 / IE2 Efficiency[cite: 25] | DRN180M4 / DRN180L4 IE3 Upgrade[cite: 25] | 18.5 kW - 22.0 kW[cite: 25] | Identical mounting dimensions; direct drop-in replacement. |
| DV200L4[cite: 25] | IE1 / IE2 Efficiency[cite: 25] | DRN200L4 IE3 Upgrade[cite: 25] | 30.0 kW[cite: 25] | Flange & shaft dimensions identical. Check terminal box position. |
| DV225S4 / DV225M4[cite: 25] | IE1 / IE2 Efficiency[cite: 25] | DRN225S4 / DRN225M4 IE3 Upgrade[cite: 25] | 37.0 kW - 45.0 kW[cite: 25] | Identical shaft centerline height & mounting pattern. Standard R137 pairing[cite: 25]. |
| DV250M4 / DV280S4 / DV280M4[cite: 25] | IE1 / IE2 Efficiency[cite: 25] | DRN250M4 / DRN280S4 / DRN280M4 IE3 Upgrade[cite: 25] | 55.0 kW - 90.0 kW[cite: 25] | B5/B14 adapter compatibility preserved. Heavy-duty R137 pairing. |
| DV315S4[cite: 25] | IE1 / IE2 Efficiency[cite: 25] | DRN315S4 IE3 Upgrade[cite: 25] | 110.0 kW[cite: 25] | Maximum power capacity pairing for R137 series. Heavy drive drop-in unit[cite: 25]. |
Expert Selection & Retrofit Engineering Notes
We specialize in providing complete drive packages and technical replacement solutions for the entire SEW-Eurodrive R137 series[cite: 25]. Whether you require a foot-mounted unit (R137 / RX127)[cite: 25], B5/B14 flange output (RF137 / RXF127)[cite: 25], or precision servomotor coupling, all mechanical designs can be supplied pre-assembled with state-of-the-art IE3 DRN series motors (DRN160M4 to DRN315S4)[cite: 25].
When retrofitting an existing application featuring an obsolete DV160, DV180, DV200, DV225, DV250, or DV280 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 DV160, DV180, DV200, DV225, DV250, or DV280 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
- R137 DRN160M4 (11 kW)[cite: 25]
- R137 DRN180M4 (18.5 kW)[cite: 25]
- R137 DRN200L4 (30 kW)[cite: 25]
- R137 DRN225M4 (45 kW)[cite: 25]
- R137 DRN250M4 (55 kW)[cite: 25]
- R137 DRN280S4 (75 kW)[cite: 25]
- R137 DRN280M4 (90 kW)[cite: 25]
- R137 DRN315S4 (110 kW)[cite: 25]
- RF137 DRN225M4 (45 kW)[cite: 25]
- RF137 DRN250M4 (55 kW)[cite: 25]
- RF137 DRN280M4 (90 kW)[cite: 25]
- RF137 DRN315S4 (110 kW)[cite: 25]
- RX127 DRN225M4 (45 kW)[cite: 25]
- RX127 DRN250M4 (55 kW)[cite: 25]
- RX127 DRN280M4 (90 kW)[cite: 25]
- RXF127 DRN280M4 (90 kW)[cite: 25]
- R137 DV225M4 (DV Replacement)[cite: 25]
- R137 DV250M4 (DV Replacement)[cite: 25]
- RF137 DV250M4 (DV Replacement)[cite: 25]
- RX127 DV280M4 (DV Replacement)[cite: 25]
