Gear Units
Today's world is often loud and hectic. For this reason, noise reduction and comfort are some of the primary objectives in the rail sector. And this despite the ever more challenging requirements that rail vehicles must satisfy. Our gear units are designed to fulfill these requirements and to meet customer needs.


Gear units for any application
Gear units from Voith are operating all over the world. They are optimally adapted to individual customer requirements and all rail applications.
Gear units for light rail vehicles and trams
Longitudinal drive
Bevel gear unit KSH-type with two stages, fully suspended

- Motor located alongside the bogie
- Motor shaft and wheelset shaft orthogonally to each other
- Motor rigidly linked with the gear unit
- Motor output shaft and Gear unit input shaft connected by a membrane coupling
- Gear unit fully suspended
- Total gear ratio effected by two gear stages (one helical and one bevel gear stage)
- Power transmission from the hollow output shaft of the gear unit to the wheelset shaft by a flexible 2-level rubber wedge coupling
- Compensation of relative movement between Motor-Gear-unit and wheelset shaft by the flexible 2-level rubber wedge coupling
- Suspension elements between Motor-Gear-Unit and bogie frame
Transversal drive
Helical gear unit SZH-type with two stages, fully suspended

- Motor located in the bogie
- Motor shaft and wheelset shaft parallel to each other
- Motor rigidly linked with the gear unit
- Motor output shaft and Gear unit input shaft connected by a membrane coupling
- Gear unit fully suspended
- Total gear ratio effected by two helical gear stages
- Power transmission from the hollow output shaft of the gear unit to the wheelset shaft by a flexible 2-level rubber wedge coupling
- Compensation of relative movement between Motor-Gear-unit and wheelset shaft by the flexible 2-level rubber wedge coupling
- Suspension elements between Motor-Gear-Unit and bogie frame
Gear units for metros
Transversal drive
Helical gear unit SE-type with one stage, axle mounted

- Motor located in the bogie
- Motor shaft and wheelset shaft parallel to each other
- Gear unit axle riding
- Total gear ratio effected by one helical gear stage
- Compensation of relative movement between motor and Gear unit by a gear coupling
- Torque reaction rod between Gear unit and bogie frame
Transversal drive
Helical gear unit SZ-type with two stage, axle mounted

- Motor located in the bogie
- Motor shaft and wheelset shaft parallel to each other
- Gear unit axle riding
- Total gear ratio effected by two helical gear stages
- Compensation of relative movement between motor and Gear unit by a gear coupling
- Torque reaction rod between Gear unit and bogie frame
Gear units for high-speed trains
Transversal drive
Helical gear unit SE-type with one stage, axle mounted

- Motor located in the bogie
- Motor shaft and wheelset shaft parallel to each other
- Gear unit axle riding
- Total gear ratio effected by one helical gear stage
- Compensation of relative movement between motor and Gear unit by a gear coupling
- Torque reaction rod or C-bracket between Gear unit and bogie frame
Transversal drive
Helical gear unit SZ-type with two stage, axle mounted

- Motor located in the bogie
- Motor shaft and wheelset shaft parallel to each other
- Gear unit axle riding
- Total gear ratio effected by two helical gear stages
- Compensation of relative movement between motor and Gear unit by a gear coupling
- Torque reaction rod or C-bracket between Gear unit and bogie frame
Longitudinal drive
Bevel gear unit KE-type with one stage, axle mounted

- Electric traction motor located outside the bogie underneath the car body
- Motor drive shaft and wheelset shaft orthogonally to each other
- Power transmission to the gear unit input shaft by cardan shaft
- Gear unit axle riding
- Total gear ratio effected by one bevel gear stage
- Compensation of relative movement between the gear unit and traction motor by cardan shaft
- Torque reaction rod between gear unit and bogie frame
Gear units for diesel multiple units
Longitudinal drive
Bevel gear unit SK-type with two stages, axle mounted

- Mechanical or hydrodynamic transmission located outside the bogie underneath the car body
- Engine drive shaft and wheelset shaft orthogonally to each other
- Power transmission to the gear unit input shaft by cardan shaft
- Gear unit axle riding
- Total gear ratio effected by two gear stages (one helical and one bevel gear stage)
- Compensation of relative movement between the gear unit and transmission by cardan shaft
- Torque reaction rod between gear unit and bogie frame
Longitudinal drive
Bevel gear unit KE-type with one stage, axle mounted

- Mechanical or hydrodynamic transmission located outside the bogie underneath the car body
- Engine drive shaft and wheelset shaft orthogonally to each other
- Power transmission to the gear unit input shaft by cardan shaft
- Gear unit axle riding
- Total gear ratio effected by one bevel gear stage
- Compensation of relative movement between the gear unit and transmission by cardan shaft
- Torque reaction rod between gear unit and bogie frame
Gear units for electric multiple units
Transversal drive
Helical gear unit SE-type with one stage, axle mounted

- Motor located in the bogie
- Motor shaft and wheelset shaft parallel to each other
- Gear unit axle riding
- Total gear ratio effected by one helical gear stage
- Compensation of relative movement between motor and Gear unit by a gear coupling
- Torque reaction rod between Gear unit and bogie frame
Transversal drive
Helical gear unit SZ-type with two stage, axle mounted

- Motor located in the bogie
- Motor shaft and wheelset shaft parallel to each other
- Gear unit axle riding
- Total gear ratio effected by two helical gear stages
- Compensation of relative movement between motor and gear unit by a gear coupling
- Torque reaction rod between gear unit and bogie frame
Transversal drive
Helical gear unit SZH-type with two stages, fully suspended

- Motor located in the bogie
- Motor shaft and wheelset shaft parallel to each other
- Motor rigidly linked with the gear unit
- Motor output shaft and gear unit input shaft connected by a membrane coupling
- Gear unit fully suspended
- Total gear ratio effected by two helical gear stages
- Power transmission from the hollow outputshaft of the gear unit to the wheelset shaft by a flexible 2-level rubber wedge coupling
- Compensation of relative movement between motor-gear-unit and wheelset shaft by the flexible 2-level rubber wedge coupling
- Suspension elements between motor-gear-unit and bogie frame
Longitudinal drive
Bevel gear unit KE-type with one stage, axle mounted

- Electric traction motor located outside the bogie underneath the car body
- Motor drive shaft and wheelset shaft orthogonally to each other
- Power transmission to the gear unit input shaft by cardan shaft
- Gear unit axle riding
- Total gear ratio effected by one bevel gear stage
- Compensation of relative movement between the gear unit and traction motor by cardan shaft
- Torque reaction rod between gear unit and bogie frame
Gear units for diesel-hydraulic locomotives
Longitudinal drive
Bevel gear unit SK-type with two stages, Axle mounted

- Hydrodynamic transmission located outside the bogie in the loco frame
- Engine drive shaft and wheelset shaft orthogonally to each other
- Power transmission to the gear unit input shaft by cardan shaft
- Gear unit axle riding
- Total gear ratio effected by two gear stages (one helical and one bevel gear stage)
- Compensation of relative movement between the gear unit and transmission by cardan shaft
- Torque reaction rod between gear unit and bogie frame
Longitudinal drive
Bevel gear unit KE-type with one stage, axle mounted

- Hydrodynamic transmission located outside the bogie in the loco frame
- Engine drive shaft and wheelset shaft orthogonally to each other
- Power transmission to the gear unit input shaft by cardan shaft
- Gear unit axle riding
- Total gear ratio effected by one bevel gear stage
- Compensation of relative movement between the gear unit and transmission by cardan shaft
- Torque reaction rod between gear unit and bogie frame
Gear units for electric and diesel-electric locomotives
Transversal drive
Helical gear unit SET-type in cannon box design with one stage, axle mounted

- Motor located in the bogie
- Motor shaft and wheelset shaft parallel to each other
- Motor rigidly linked with the gear unit
- Motor-gear unit axle riding
- Total gear ratio effected by one helical gear stage
Transversal drive
Helical gear unit SE-type with one stage, axle mounted

- Motor located in the bogie
- Motor shaft and wheelset shaft parallel to each other
- Gear unit axle riding
- Total gear ratio effected by one helical gear stage
- Compensation of relative movement between motor and gear unit by a gear coupling
- Torque reaction rod between gear unit and bogie frame
Gear units for special purpose vehicles
Longitudinal drive
Bevel gear unit SK-type with two stages, axle mounted

- Mechanical or hydrodynamic transmission located outside the bogie underneath the car body
- Engine drive shaft and wheelset shaft orthogonally to each other
- Power transmission to the gear unit input shaft by cardan shaft
- Gear unit axle riding
- Total gear ratio effected by two gear stages (one helical and one bevel gear stage)
- Compensation of relative movement between the gear unit and transmission by cardan shaft
- Torque reaction rod between gear unit and bogie frame
Longitudinal drive
Bevel gear unit KE-type with one stage, axle mounted

- Mechanical or hydrodynamic transmission located outside the bogie underneath the car body
- Engine drive shaft and wheelset shaft orthogonally to each other
- Power transmission to the gear unit input shaft by cardan shaft
- Gear unit axle riding
- Total gear ratio effected by one bevel gear stage
- Compensation of relative movement between the gear unit and transmission by cardan shaft
- Torque reaction rod between gear unit and bogie frame
Transversal drive
Helical gear unit SE-type with one stage, axle mounted

- Motor located in the bogie
- Motor shaft and wheelset shaft parallel to each other
- Gear unit axle riding
- Total gear ratio effected by two helical gear stages
- Compensation of relative movement between motor and gear unit by a gear coupling
- Torque reaction rod between gear unit and bogie frame

Piano for the Red Arrow

Reliable gear units for Rio

Rain-resistant gear units for the Pramexs

Custom-fit solution for French ultrasonic test trains

Full suspension to protect the rail

Fully sprung gear units for maximum driving comfort

Large sizes for Korean freight transport

French style for Korea

Compact gear units for high speeds

Gear units for quieter rail traffic

More than 5,000 SZ-400 for rail transport worldwide

Customer-oriented production for Bombardier

On site for Delhi's Metro
Our service experts take care of maintaining the Voith SE-344 gear units installed in the vehicles of the Delhi Metro. DMRC benefits from fast response times. After all, the Voith Service Center is located in Delhi’s' suburb Faridabad and thus only a one-hour ride on the Violet line.