Calculating dimensions of universal joints

The selection of a universal joint ist not determined exclusively by the max. torque to be transmitted. There are also other operative conditions which must be taken into account, such as impact load, angular ratios, angular velocities, etc.
The diagrams presented below give approximate preliminary values for calculating the dimensions of the universal joints and contain the corresponding standard values.

 


Image 1 shows the power and torque values transmitted by single precision universal joints during permanent operation with a deflection angle of α = 10°.

Image 2 shows the adjustment value to be taken into consideration for greater deflection angles. For deflection angles less than 10°, e.g. between 0° to 5° you may increase the standard power value shown in image 1 by 25%.

 

Leistungsdiagramm für Präzisions-Wellengelenke mit Gleitlager nach DIN 808-G
Image 1: Power diagram for precision universal joints with friction bearings in accordance with DIN 808-G
Korrekturwerte in Abhängikeit vom Ablenkungswinkel
example_universal_joints_g

Image 2: Adjustment value in relation to the deflection angle

Image 3 shows the service life of BÜCO’s maintenance-free precision universal joints with needle bearings depending on the impact factor (e.g. standard value 1.5 for an electromotor drive without flexible coupling), the adjustment value for the deflection angle and the torque value to be transmitted.

Image 4 shows the adjustment value for calculating the service life of BÜCO’s maintenance-free precision universal joints with needle bearings.

 

Image 3:  Service life diagram for precision universal joints with needle bearings DIN 808-W
example_universal_joints_w

Image 4: Adjustment values with relation to the deflection angle

Image 5 shows the power and torque values transmitted by single precision universal joints (bracket version) during permanent operation and with a deflection angle of α = 10°.

Image 6 shows the adjustment value to be taken into consideration for greater deflection angles. For deflection angles between 0° to 5° you may increase the standard power value by 25%.

 

Leistungsdiagramm für Präzisions-Laschen­­gelenke mit Gleitlager
Image 5: Power diagram for precision bracket joints with friction bearings
Korrekturwerte in Abhängigkeit vom Ablenkungswinkel
example_universal_joint_bracket

Image 6: Adjustment values with relation to the deflection angle

 

Download complete PDF