Page 13 - 810 Trianing Book Extract

Machine setup questions
Explanations and diagrams

8
Motor Close Coupled? (Single-shaft) (Also called direct mount or direct drive.)

Yes: if both are true:
A Motor is “close-coupled” if:

• The motor shaft drives the driven components
• There are no bearings on driven unit
directly.
• There is only one shaft running at one speed
• The only bearings are on the motor shaft. (for
example, when the motor is bolted directly to a fan,

a pump, or a compressor).

No: all other cases.

If in doubt, select No and go to step 9.

Because most machines are coupled and not
close-coupled

Hints and tips

Motor close-coupled is an industry term for a single shaft machine. It means not coupled. The motor and
driven unit are both on the motor shaft—two motor bearings only.

9
Coupling between motor and next component?
Flexible or rigid coupling

Yes: there is lexible material between the langes of Regardless of coupling type: There are
the coupling. If the next component is a gear box, go bearings on both motor and driven shafts, and

to step 11. Otherwise, go to step 12.
both are running at the same speed
If in doubt, select Flexible Coupling.

Flexible Coupling

No: the coupling is rigid and the langes are bolted

together with no lexible material, or there is no cou-
pling. If the next component is a belt drive, go to step

10. If the next component is a gear box, go to step 11.
Otherwise, go to step 12.

Rigid Coupling

Hints and tips

Flexible coupling. When the design wizard asks if there is a coupling it is really asking if there is a

lexible coupling.
Yes, there is a coupling = lexible

No coupling = rigid or solid

If in doubt, select Flexible coupling because lexible couplings are far more common than rigid.

Chapter 4: Step-by-step: setup and measure your machines 67