PR21 railway gearbox

PR21 railway gearbox

Heavy-duty axle-mounted gearbox

The mastery of the design and manufacture of mechanical sub-assemblies guarantees technical follow-up for the very long life of railway vehicles. This is why CFD remains committed to offering its own cranes. Mounted on the whole range of B, C or BB type locomotives, they are designed to last.

Presentation

The CFD PR21 axle is designed for a wheel bore diameter up to of 215mm, allowing a maximum load of 20t per axle (22t under conditions). Contrary to many existing solutions, the bevel gear is installed on the input stage of the bridge. This mounting allows the input shaft to be mounted without overhang, which improves efficiency and increases the service life of the assembly. The secondary stage consists of a parallel-shaft reduction stage with the gearwheel shrunk onto the axle

PR21 railway gearbox
PR21 railway gearbox

The double reduction of the axle allows a wide range of reduction ratios (from 3.1 to 7.2). Lubrication is by splash or forced lubrication depending on the application. Each bearing has a dedicated lubrication line.

PR21 railway gearbox view

PR21 railway gearbox view

PR21 railway gearbox side view

PR21 railway gearbox side view

Application

Locomotives
Maintenance-of-way vehicles.

  • 20t axle load (22t under conditions)
  • reduction ratio from 3.1 to 7.2
  • double reduction stage
  • very high maximum torque
  • inlet flange DIN 225 or 285
General information
Upper reducerKlingelnberg bevel gear
Lower gearboxParallel helical gear
Maximum wheel bore diameter 215 mm
maximum input speed2900 rpm
Torque output42500 N.m at peak
General information

EQUIPMENT

SPEED SENSORS
option
GREASE
internal pump
The list of equipment is not exhaustive. Other information is available on request
Diagram of the CFD PR21 railway gearbox
Diagram of the CFD PR21 railway gearbox
To know more about it

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