Motor Shaft and Bearings

Design of the Shaft End

Smooth shaft end (standard)

With a non-positive connection, torque transmission must be achieved only by surface pressure to help ensure power transmission without backlash.

Shaft end with round-ended feather key according to DIN 6885

Shaft connections with feather keys are positive. The feather key seating can deflect under continuous strain with changing torques and prolonged reverse operation, causing backlash. As a result, rotational quality is reduced due to backlash. Increasing deformation can lead to the feather key breaking and damage to the shaft.

This type of shaft hub connection is only suitable for low requirements. Therefore, use smooth shaft ends.

Bearing

The back side bearing is designed as a fixed bearing and the bearing on shaft output side as a floating bearing.

Permissible Shaft Load

In case of technical correct use, the life of drives is limited by the bearing life. You cannot replace the bearing, as the measuring systems integrated in the drive must then be reinitialized.

The graphic shows the definition of shaft load:

G-SE-0055006.1.gif-high.gif

 

 

The table shows the permissible radial force Fradial [N]:

Motor

1000 min-1

2000 min-1

3000 min-1

4000 min-1

5000 min-1

6000 min-1

ILM0701P

660

520

460

410

380

360

ILM0702P

710

560

490

450

410

390

ILM0703P

730

580

510

460

430

400

ILM1001P

900

720

630

ILM1002P

990

790

690

ILM1003P

1050

830

730

ILM1401M

2210

1760

-

ILM1401P

2210

1760

1530

ILM1402P

2430

1930

-

-

-

-

Basis for calculation:

The permissible axial force Faxial [N] is calculated according to:

Faxial = 0.2 x Fradial

oNominal bearing life L10h = 20,000 h for a shaft without feather key nut (for operating hours at a 10% detected failure probability)

oAmbient temperature = 40 °C / 104 °F (approx. 100 °C / 212 °F storage temperature)

oPeak torque = 10% ED

oNominal torque = 100% ED