Technical data

Manual – Gear Units and Gearmotors

Gear units with IEC or NEMA adapter AM (→ GK)

Project Planning for Components on the Input Side

Backstop

AM../RS

If the application requires only one direction of rotation, the AM adapter 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 inside the backstop without

making contact above a certain speed (lift-off speed). This means backstops operate

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

Dimensions:

The backstop is completely integrated in the adapter. This means the dimensions are

the same as with adapter without backstop (see dimension sheets in the Adapter AM

section).

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.

CCW = Counterclockwise rotation

CW = Clockwise rotation

Type Maximum locking torque backstop Lift-off speed

[lb-in] [rpm]

AM80, AM90, AM143, AM145 795 640

AM100, AM112, AM182, AM184 3010 600

AM132, AM213/215 6200 550

AM160, AM180, AM254/256,

AM284/286

10600 630

AM 200, AM225, AM324/326

AM364/365

12800 430

50290AXX

Figure 15: Direction of rotation of output

CCW