MOTOX K48-LA71M4 Bevel-Helical Gearmotor
The iconic MOTOX gearmotor series was originally created and engineered by FLENDER. Following Siemens' acquisition of Flender, MOTOX was integrated into Siemens' drive portfolio under the 2KJ catalog line (2KJ1503 for K48). Subsequently, Siemens carved out its heavy-duty motors and gearmotors business under the INNOMOTICS brand. 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.
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. Cataloged under Siemens 2KJ order code 2KJ1503, the K48 size delivers nominal output torques up to 400 Nm and is paired with 0.37 kW LA71M4 motors. Featuring 96% stage efficiency, rigid cast iron housing construction, and high overhung load capacity, 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) ideal for conveyor drives, bucket elevators, roller tables, cranes, and agitators.
Technical Specifications
| Model / Part Number | K48-LA71M4 (Order Code: 2KJ1503-..CE13) |
|---|---|
| Brand Lineage | Flender → Siemens → Innomotics → Original OEM Factory Brand |
| Gear Unit Type | MOTOX K Series (3-Stage Bevel-Helical Right-Angle) |
| Catalog Frame Size | Size K48 (Nominal torque capacity: 400 Nm) |
| Matched Motor Type & Power | LA71M4 / LA71ZMP4 (0.37 kW AC Squirrel-Cage Motor) |
| Output Speed / Ratio Range | i = 3.57 to 307.24 (Customizable ratios available) |
| Shaft & Mounting Options | Foot-mounted, Flange B5/B14, Solid Shaft, Hollow Shaft with Keyway/Shrink Disc/SIMOLOC |
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. 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) | 2KJ1500-.. & 2KJ1501-.. | Up to 200 Nm | LA63 to LA80 (0.09 kW - 0.75 kW) |
| MOTOX K Series (3-Stage Right Angle) | 2KJ1502-.. to 2KJ1511-.. | Up to 20,000 Nm | LA63 to LG250 (0.12 kW - 45 kW) |
| Hollow Shaft Keyway (KA / BA) | 2KJ15..-Z A | Up to 20,000 Nm | Hollow Shaft Output with Keyway |
| Flange Executions (KAF / KF / BF) | 2KJ15..-Z F | Up to 20,000 Nm | B5 Flange Output Mounting |
| Hollow Shaft Shrink Disc (KAD) | 2KJ15..-Z D | Up to 20,000 Nm | Keyless Shrink Disc Connection |
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. 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) | Siemens / Innomotics | MOTOX K38-LA71S4 OEM Direct | 0.25 kW | Direct 1-to-1 flange & shaft match. Complete interchangeability. |
| 2KJ1503-..CE13 (K48) | Siemens / Innomotics | MOTOX K48-LA71M4 OEM Direct | 0.37 kW | Standard K48 drive package. 100% drop-in replacement. |
| 2KJ1504-..DE13 (K68) | Siemens / Innomotics | MOTOX K68-LA80ZMB4E OEM Direct | 0.55 kW | Identical shaft centerline height & foot mounting bolt pattern. |
| 2KJ1505-..EM13 (K88) | Siemens / Innomotics | MOTOX K88-LA90SB4E OEM Direct | 0.75 kW | Heavy conveyor drive. Preserves existing torque arm / flange. |
| 2KJ1506-..FM13 (K108) | Siemens / Innomotics | MOTOX K108-LA100ZLP4E OEM Direct | 1.5 kW | Maximum torque capacity for K series. 100% exact replacement. |
Expert Selection & Retrofit Engineering Notes
When retrofitting an existing installation featuring older Flender MOTOX or Siemens 2KJ1503 gearmotors, sourcing directly through authentic OEM channels ensures complete dimensional interchangeability, original gear tooth geometry, and zero modification costs. 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.
Core Benchmark Model Standard Configurations
- B28-LA71B4 (0.18 kW)
- K38-LA71S4 (0.25 kW)
- K38-LA71M4 (0.37 kW)
- K48-LA71M4 (0.37 kW)
- K48-LA80M4 (0.55 kW)
- K68-LA80M4 (0.55 kW)
- K68-LA90S4 (0.75 kW)
- K88-LA90S4 (0.75 kW)
- K88-LA100L4 (1.5 kW)
- K108-LA112M4 (3.0 kW)
- K128-LA132S4 (4.0 kW)
- K148-LA160M4 (7.5 kW)
- KA48-LA71M4 (Hollow Shaft)
- KF48-LA71M4 (Flange Shaft)
- KAF48-LA71M4 (Hollow Flange)
- KAD48-LA71M4 (Shrink Disc)
- KAT48 Torque Arm Package
- 2KJ1503-1CE13 (Siemens Code)
- 2KJ1504-1DE13 (Siemens Code)
- 2KJ1505-1EM13 (Siemens Code)
