Montagerichtlinien Kreuzgelenke und Gelenkwellen, Blatt 1

Mounting information
Universal joints

The single universal joints transfer the initial smooth rotation as an irregular rotation. One revolution of the drive shaft via single universal joint will cause the driven shaft to accelerate and decelerate twice. The extent of the irregularity depends on the operating angle ß.
In order to obtain a smooth rotation of the driven shaft two single or one double universal joint is required. In such cases where minor irregularities in the movement are acceptable or where minor operating angles are the norm a single universal joint will do.

For a smooth transfer of a rotating speed, the angle of inclination ß must be equal at both ends of the connecting shaft.

Incorrectly connected universal joints at both ends of a connecting shaft do not eliminate an irregular rotating speed, but will amplify it. This will in fact result in the eventual failure of the universal joint bearings as well as the keyways at the shaft ends. To avoid this it is of vital imortance that the connecting shaft ends are mounted so that the arrow marks on shaft are in line opposite each other.

Furthermore the bearings must be as close as possible to the universal joints.
For continuous operation of universal joints with friction bearings adequate lubrication is essential. If drip lubrication is not possible they should be lubricated at least once a day. It is also possible to fit the universal joint with a gaiter GN 808.1which can be filled with oil or grease.

The single universal joints transfer the initial smooth rotation as an irregular rotation. One revolution of the drive shaft via single universal joint will cause the driven shaft to accelerate and decelerate twice. The extent of the irregularity depends on the operating angle ß. In order to obtain a smooth rotation of the driven shaft two single or one double universal joint is required. In such cases where minor irregularities in the movement are acceptable or where minor operating angles are the norm a single universal joint will do.
For a smooth transfer of a rotating speed, the angle of inclination ß must be equal at both ends of the connecting shaft.
Incorrectly connected universal joints at both ends of a connecting shaft do not eliminate an irregular rotating speed, but will amplify it. This will in fact result in the eventual failure of the universal joint bearings as well as the keyways at the shaft ends. To avoid this it is of vital imortance that the connecting shaft ends are mounted so that the arrow marks on shaft are in line opposite each other.
Furthermore the bearings must be as close as possible to the universal joints. For continuous operation of universal joints with friction bearings adequate lubrication is essential. If drip lubrication is not possible they should be lubricated at least once a day. It is also possible to fit the universal joint with a gaiter GN 808.1which can be filled with oil or grease.