MOTOX K48-LA71M4 Bevel-Helical Gearmotor
The iconic MOTOX gearmotor series was originally created and engineered by FLENDER[cite: 21]. Following Siemens' acquisition of Flender, MOTOX was integrated into Siemens' drive portfolio under the 2KJ catalog line (2KJ1503 for K48)[cite: 21]. Subsequently, Siemens carved out its heavy-duty motors and gearmotors business under the INNOMOTICS brand[cite: 21]. Today, MOTOX products have transitioned back to the original manufacturing plants and authentic OEM supplier channels, ensuring 100% exact design continuity, mechanical interchangeability, and original quality standards[cite: 21].
The MOTOX K48-LA71M4 is a 3-stage right-angle bevel-helical gearmotor designed for heavy-duty drive applications requiring right-angle power transmission, high mechanical strength, and space-saving efficiency[cite: 21]. Cataloged under Siemens 2KJ order code 2KJ1503[cite: 21], the K48 size delivers nominal output torques up to 400 Nm and is paired with 0.37 kW LA71M4 motors[cite: 21]. Featuring 96% stage efficiency, rigid cast iron housing construction, and high overhung load capacity[cite: 21], MOTOX K series gearmotors are available in versatile configurations (foot K48, hollow shaft KA48, flange KAF48, shrink disc KAD48, and shaft-mounted torque arm KAT48)[cite: 21] ideal for conveyor drives, bucket elevators, roller tables, cranes, and agitators[cite: 21].
Technical Specifications
| Model / Part Number | K48-LA71M4 (Order Code: 2KJ1503-..CE13)[cite: 21] |
|---|---|
| Brand Lineage | Flender → Siemens → Innomotics → Original OEM Factory Brand[cite: 21] |
| Gear Unit Type | MOTOX K Series (3-Stage Bevel-Helical Right-Angle)[cite: 21] |
| Catalog Frame Size | Size K48 (Nominal torque capacity: 400 Nm)[cite: 21] |
| Matched Motor Type & Power | LA71M4 / LA71ZMP4 (0.37 kW AC Squirrel-Cage Motor)[cite: 21] |
| Output Speed / Ratio Range | i = 3.57 to 307.24 (Customizable ratios available)[cite: 21] |
| Shaft & Mounting Options | Foot-mounted, Flange B5/B14, Solid Shaft, Hollow Shaft with Keyway/Shrink Disc/SIMOLOC[cite: 21] |
Documentation & Resources
MOTOX K Series Bevel-Helical Modular Architecture Matrix
Full-range modular configuration guide for Flender / Siemens / Innomotics MOTOX K series right-angle bevel-helical gearboxes[cite: 21]. Review supported frame sizes, 2KJ order code structure, and mounting forms:
| Gearbox Stage & Mounting Form | 2KJ Order Code Prefix | Max Torque Rating (Nm) | Matched Motor Frame Range |
|---|---|---|---|
| MOTOX B Series (2-Stage Compact)[cite: 21] | 2KJ1500-.. & 2KJ1501-..[cite: 21] | Up to 200 Nm[cite: 21] | LA63 to LA80 (0.09 kW - 0.75 kW)[cite: 21] |
| MOTOX K Series (3-Stage Right Angle)[cite: 21] | 2KJ1502-.. to 2KJ1511-..[cite: 21] | Up to 20,000 Nm[cite: 21] | LA63 to LG250 (0.12 kW - 45 kW)[cite: 21] |
| Hollow Shaft Keyway (KA / BA)[cite: 21] | 2KJ15..-Z A[cite: 21] | Up to 20,000 Nm[cite: 21] | Hollow Shaft Output with Keyway[cite: 21] |
| Flange Executions (KAF / KF / BF)[cite: 21] | 2KJ15..-Z F[cite: 21] | Up to 20,000 Nm[cite: 21] | B5 Flange Output Mounting[cite: 21] |
| Hollow Shaft Shrink Disc (KAD)[cite: 21] | 2KJ15..-Z D[cite: 21] | Up to 20,000 Nm[cite: 21] | Keyless Shrink Disc Connection[cite: 21] |
MOTOX 2KJ Order Code & Brand Cross-Reference Guide
MOTOX bevel-helical gearmotors installed under Flender, Siemens 2KJ, or Innomotics nameplates can be seamlessly cross-referenced and supplied directly via authentic OEM factory channels[cite: 21]. Refer to the catalog code mapping below:
| Legacy / Current Nameplate Code | Brand Generation | Current OEM Equivalent Model | Rated Motor Power | Mechanical Compatibility & Retrofit Notes |
|---|---|---|---|---|
| 2KJ1502-..CD13 (K38)[cite: 21] | Siemens / Innomotics[cite: 21] | MOTOX K38-LA71S4 OEM Direct[cite: 21] | 0.25 kW[cite: 21] | Direct 1-to-1 flange & shaft match. Complete interchangeability[cite: 21]. |
| 2KJ1503-..CE13 (K48)[cite: 21] | Siemens / Innomotics[cite: 21] | MOTOX K48-LA71M4 OEM Direct[cite: 21] | 0.37 kW[cite: 21] | Standard K48 drive package. 100% drop-in replacement[cite: 21]. |
| 2KJ1504-..DE13 (K68)[cite: 21] | Siemens / Innomotics[cite: 21] | MOTOX K68-LA80ZMB4E OEM Direct[cite: 21] | 0.55 kW[cite: 21] | Identical shaft centerline height & foot mounting bolt pattern[cite: 21]. |
| 2KJ1505-..EM13 (K88)[cite: 21] | Siemens / Innomotics[cite: 21] | MOTOX K88-LA90SB4E OEM Direct[cite: 21] | 0.75 kW[cite: 21] | Heavy conveyor drive. Preserves existing torque arm / flange[cite: 21]. |
| 2KJ1506-..FM13 (K108)[cite: 21] | Siemens / Innomotics[cite: 21] | MOTOX K108-LA100ZLP4E OEM Direct[cite: 21] | 1.5 kW[cite: 21] | Maximum torque capacity for K series. 100% exact replacement[cite: 21]. |
Expert Selection & Retrofit Engineering Notes
When retrofitting an existing installation featuring older Flender MOTOX or Siemens 2KJ1503 gearmotors[cite: 21], sourcing directly through authentic OEM channels ensures complete dimensional interchangeability, original gear tooth geometry, and zero modification costs[cite: 21]. Simply send us your existing Siemens 2KJ order code or nameplate serial number, and our engineering team will provide a 100% compliant replacement specification and quotation[cite: 21].
Core Benchmark Model Standard Configurations
- B28-LA71B4 (0.18 kW)[cite: 21]
- K38-LA71S4 (0.25 kW)[cite: 21]
- K38-LA71M4 (0.37 kW)[cite: 21]
- K48-LA71M4 (0.37 kW)[cite: 21]
- K48-LA80M4 (0.55 kW)[cite: 21]
- K68-LA80M4 (0.55 kW)[cite: 21]
- K68-LA90S4 (0.75 kW)[cite: 21]
- K88-LA90S4 (0.75 kW)[cite: 21]
- K88-LA100L4 (1.5 kW)[cite: 21]
- K108-LA112M4 (3.0 kW)[cite: 21]
- K128-LA132S4 (4.0 kW)[cite: 21]
- K148-LA160M4 (7.5 kW)[cite: 21]
- KA48-LA71M4 (Hollow Shaft)[cite: 21]
- KF48-LA71M4 (Flange Shaft)[cite: 21]
- KAF48-LA71M4 (Hollow Flange)[cite: 21]
- KAD48-LA71M4 (Shrink Disc)[cite: 21]
- KAT48 Torque Arm Package[cite: 21]
- 2KJ1503-1CE13 (Siemens Code)[cite: 21]
- 2KJ1504-1DE13 (Siemens Code)[cite: 21]
- 2KJ1505-1EM13 (Siemens Code)[cite: 21]
