Universal BUT Special

High-Performance

Joints&Shafts

CRITERIA for Joints selection.

The table shows the Maximum allowable torque (expressed in Kgm) calculated on the basis with an angle of 10° and with continuous use. If the angle is more than 10°, the indicated values will be reduced in accordance with the torque factors shown below.

Example: criteria for selection of joint after taking into account the power to be transmitted,

the speed and the angle of inclination.

Example:

- power N 3 CV

- speed 2000 RPM.

- angle a 20°

To calculate the corresponding torque moment, follow the example:

716,2 x N        716,2 x 3

Mt =                   =                   = 1,074Kgm

n                 2000

The torque to be transmitted is 1074 Kgm but, since the joint angle is 20°, the user must select a joint with larger dimension and torque in order carry the needed torque on it.

Since the torque factor for 20° is 0,75 (as indicated on the table), divide Mt by F. Follow the example.

MT       1,074

=            MT 1,432Kgm

F          0,75

The appropriate joint should have a torque capability of 1432 Kgm or higher.

Per you reference, selected the proper Joint from the table of joint with needle bearings (, in the example, the V Series becasue of its speed). Model, in the example, is 105V.

Pay attention that 1 Kgm corresponds 9,80665Nm.

ROTAR is a brand owned by OFFICINA MECCANICA FRATELLI ARAMINI - Via Dordoni 5, Castelleone - 26012 - CR - ITALY - Phone +39 0374 58306 - VAT N. 00107640195