The provided data allows for a rough evaluation of the type of double cardan joint to be used.
The indicated dimensions refer to standard production assemblies and do not represent the maximum limits of travel and clearance.
Our product range includes both double joints with a Ring-shaped central body and double joints with an H-shaped central body.
The latter allow for a significant reduction in rotational clearance (functional sphere) and are therefore used in cases where the housing space for the double joint is limited.
The maximum steering angle achievable with our products is 60°.
We can supply both in-line and offset cross journals. Offset cross journals significantly reduce the housing clearance of the double cardan joint and ensure a smoother transmission.
Our cross journals can either be "long-life" (maintenance-free) or designed for periodic greasing.
This greasing can be performed via grease nipples located on the head of the bearing cups or directly on the cross journal body.
Alternatively, a centralized greasing system can be implemented which, through a grease nipple placed on the central body of the double joint, allows the grease to flow inside the bearings.
For the manufacturing of our products, we use quenched and tempered steels or case-hardening steels.
The most frequently used are:
Quenched and tempered steels:
42 CrMo4 – 41 CrS4 – C45 – C50 – 36CrMn5 – 50CrV4 according to the EN ISO 683-2: 2018 standard (formerly EN 10083-1 / EN 10083-3)
Case-hardening steels:
17NiCrMo6 – 20MnCr5 according to the EN ISO 683-3: 2018 standard (formerly EN 10084: 2008)
Additional materials may be used upon customer request.
Sizing criteria for double cardan joints:
The sizing of a double cardan joint is essentially determined by the maximum possible torque. This can be calculated from the drive torque (obtained by considering transmission efficiency, the relative load distribution, and engine performance) or from the wheel slip torque (knowing the friction coefficient μ, the axle load, and the wheel radius).
The lower value between the two obtained represents the maximum operating torque to be used for the proper sizing of the double cardan joint. The double joint determined this way will still feature a remarkable lifespan, as the percentage of operating time at maximum loads is usually very limited.
Test bench testing
SOREM is capable of performing accurate test bench testing, both for fatigue and ultimate strength (destructive testing), with a maximum load capacity of up to 16 KN.