SEW X3F120e Industrial Gearbox (Xe Generation Size 120)
The SEW X3F120e is a 3-stage parallel helical heavy-duty industrial gearbox engineered within SEW-Eurodrive's upgraded Xe Generation (Generation e) platform. Delivering a nominal output torque capacity of 12.8 kNm, the Size 120/130 Xe Series incorporates optimized gear tooth contact geometry, expanded housing surface thermal dissipation, low-friction seal assemblies, and extended bearing operational life. Designed to cover nominal torques from 6.8 kNm up to 475 kNm across the X platform, the X120e and X130e sizes provide complete 1-to-1 dimensional compatibility to directly replace legacy MC03 Series (MC2RL03 / MC3RL03) and M Series industrial speed reducers in material handling conveyors, bucket elevators, mixers, agitators, and crane hoists.
Technical Specifications
| Model / Part Number | X3F120e (3-Stage Helical, Size 120 Xe Generation) |
|---|---|
| Brand / Manufacturer | SEW-Eurodrive |
| Gear Unit Layout | Parallel Helical (X.F / X.Fe) & Right-Angle Bevel-Helical (X.K / X.Ke) |
| Frame Size Focus | Sizes X120e (12.8 kNm) & X130e (16.0 kNm) |
| Nominal Torque Output | 12.8 kNm (X120e) / 16.0 kNm (X130e) / 6.8 to 475 kNm (Full Series Range) |
| Gear Ratio Range | i = 6.3 to 450 (2-stage, 3-stage, and 4-stage executions) |
| Legacy Compatibility | Direct drop-in replacement for SEW MC03 (MC2RL03 / MC3RL03), M, and M3 Series |
| Shaft & Mounting Design | Solid Shaft, Hollow Shaft with Keyway/Shrink Disc, Flange, Torque Arm |
Documentation & Resources
SEW X & Xe Series Modular Architecture Matrix
Structural layout guide for SEW-Eurodrive X and Xe series industrial gearboxes across parallel helical and right-angle bevel-helical configurations. Review supported mounting orientations, shaft executions, and auxiliary thermal options:
| Gear Unit Layout & Series Design | Frame Size Range | Nominal Torque Capacity (kNm) | Standard Factory Accessories |
|---|---|---|---|
| X.F / X.Fe (2, 3, 4-Stage Parallel Helical) | X100e to X320e (23 Sizes) | 6.8 kNm - 475 kNm | /CC (Fan Cooling Cover) |
| X.K / X.Ke (2, 3, 4-Stage Right-Angle Bevel-Helical) | X100e to X320e (23 Sizes) | 6.8 kNm - 475 kNm | /OW (Water/Oil Heat Exchanger) |
| X.T (3-Stage Bucket Elevator Drives) | X100e to X300e (10 Sizes) | 6.8 kNm - 350 kNm | /OA (Air/Oil Heat Exchanger) |
| X.P (Planetary Helical Combination Drives) | X100e to X300e (10 Sizes) | 22.0 kNm - 350 kNm | /BS (Backstop / Anti-Runback Device) |
| MC / M Series (Legacy Retrofit Executions) | MC02 to MC09 / M50 to M120 | 6.0 kNm - 180 kNm | /MH (Engineered Adapter Flange) |
Legacy SEW MC / M / M3 Gearbox Replacement & Xe Upgrade Guide
Obsolete SEW industrial gearboxes (MC2RL03, MC3RL03, MC2RH03, MC3RH03) can be directly upgraded to current high-efficiency Xe generation gear units. Refer to the dimensional and torque replacement mapping below:
| Legacy Gearbox Model (Obsolete) | Original Torque Rating | Current Xe Series Replacement | Xe Nominal Torque | Mechanical Retrofit & Mounting Compatibility Notes |
|---|---|---|---|---|
| MC2RL02 / MC3RL02 / MC3RH02 | 6.0 kNm - 7.5 kNm | X2F100e / X3F100e / X3K100e Xe Upgrade | 6.8 kNm | Direct centerline height & foot mounting match. Standardized adapter available. |
| MC2RL03 / MC3RL03 / MC3RH03 | 11.0 kNm - 13.0 kNm | X2F120e / X3F120e / X3K120e Xe Upgrade | 12.8 kNm | Identical output shaft diameter and keyway dimensions; drop-in swap. |
| MC2RL04 / MC3RL04 / MC3RH04 | 18.0 kNm - 21.0 kNm | X2F140e / X3F140e / X3K140e Xe Upgrade | 22.0 kNm | Upgraded gear geometry. Preserves existing torque arm and mounting base. |
| MC2RL05 / MC3RL05 / MC3RH05 | 25.0 kNm - 32.0 kNm | X2F160e / X3F160e / X3K160e Xe Upgrade | 38.0 kNm | Higher thermal capacity eliminates external cooling fans in many installations. |
| MC2RL06 / MC3RL06 / MC3RH06 | 42.0 kNm - 52.0 kNm | X2F180e / X3F180e / X3K180e Xe Upgrade | 58.0 kNm | Matches heavy conveyor drive footprints. Full interchangeability with MC06. |
| M2PSF50 to M3PSF90 / ML Series | 60 kNm - 180 kNm | X3F200e to X3F260e Xe Upgrade | 79 kNm - 205 kNm | Custom sub-base adapters ensure direct alignment with existing foundation bolts. |
Expert Selection & Retrofit Engineering Notes
If you are replacing an obsolete MC03 Series (MC2RL03 to MC3RL03), M Series, or M3 Series unit, upgrading to the new Xe Generation Size 120/130 ensures complete mechanical interchangeability while offering significantly higher thermal ratings and extended oil service intervals. Simply supply us with your existing SEW serial number or nameplate data, and our engineering team will provide a 100% compliant replacement specification and quote.
Core Benchmark Model Standard Configurations
- X3F120e (12.8 kNm)
- X3K120e (12.8 kNm)
- X2F120e (12.8 kNm)
- X2K120e (12.8 kNm)
- X3F130e (16.0 kNm)
- X3K130e (16.0 kNm)
- X3F100e (6.8 kNm)
- X3K100e (6.8 kNm)
- X3F140e (22.0 kNm)
- X3K140e (22.0 kNm)
- X3F160e (38.0 kNm)
- X3K160e (38.0 kNm)
- X3F180e (58.0 kNm)
- X3K180e (58.0 kNm)
- X3F200e (79.0 kNm)
- X3F220e (112 kNm)
- MC3RLSF03 (MC03 Replacement)
- MC2RLSF03 (MC03 Replacement)
- M3PSF50 (M Replacement)
- M3RSF60 (M Replacement)
