Technical data

Manual – Gear Units and Gearmotors

Adapter with hydraulic centrifugal coupling AT (→ GK)

Project Planning for Components on the Input Side

Backstop AT../RS

option

If the application requires only one permitted direction of rotation, the hydraulic centrif-

ugal coupling can be configured with a backstop. Backstops with centrifugal lift-off

sprags are used. The advantage of this design is that the sprags move around in the

backstop without making contact above a certain speed. This means the backstops

operate wear-free, maintenance-free, without losses, and are suited for high speeds.

Dimensions The dimensions of the hydraulic centrifugal coupling with backstop AT../RS are identical

to those of the hydraulic centrifugal coupling AT.. (see dimension drawings in the section

Hydraulic centrifugal coupling AT..).

Locking torques

Specify output

direction of rotation

when ordering

When you order a gear unit with adapter and backstop, it is necessary to indicate the

direction of rotation for the output shaft/output side. The direction of rotation is given

looking onto the output shaft/output side of the gear unit. For drives with shaft ends at

sides A and B, the direction of rotation must be specified as looking onto side A.

Check the direction of rotation of the drive before starting up the system to avoid

damage.

Type

Maximum locking torque backstop

[lb-in]

Lift-off speed

[rpm]

AT311/RS - AT322/RS 3010 600

AT421/RS - AT422/RS 6200 550

AT522/RS - AT542/RS 10600 630

53721AXX

Figure 26: Specify output direction of rotation when ordering

CCW = Counterclock-

wise rotation

CW = Clockwise

rotation

CCW