Joint Size & Shaft Selection

Guide to joint size & shaft selection

Given that the power & RPM that are imposed upon the shaft are known, then the torque transmitted will be:

T = HP×7119 or KW×9542 Nm
RPM   RPM

This torque has to be effected by consideration of joint bearing life required, operating angle & application conditions.

The graphs D, E & F for the 3 different joint designs are based on a B10 bearing life of 5,000 hours and joint angle of 3 degrees.

Graphs A & B give the appropriate factors for greater life and larger angle. A further factor should be included if there is direct connection of the shaft to prime movers as given in table C.

graph_a

graph_b

Effective Torque Te = T × K1 K2 × K3

TABLE C

PRIME MOVER K3
Electric Motor (4cyl. and more) 1,00
Gasoline engine (4cyl. and more) 1,25
Diesel engine (4cyl. and more) 1,30

 

Using Te & RPM as the co-ordinates on either of the following graphs D, E or F locate the application position in relation to the series lines. If this should be between two series lines, select the upper one.

Speak to one of our experts.

0121 344 5500
sales@ims-ltd.co.uk

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