A hand holding an object in his hand Description automatically generated

A motor shaft is needed for blade testing and can be found in QA or is to be taken from a motor for future use.
These shafts are labelled for the assigned blade.
 This shaft will be used for both bore force and runout testing.

A picture containing indoor, sitting, cup, table Description automatically generated

For bore force the force gauge is used.
The force gauge is set to “Peak” (this is completed by pressing the “Peak” button on the force gauge) to retain the highest measurement.
Line the flat of the shaft for the motor up with the flat of the blade. This flat is referred to as the “D” shape of the shaft.
 This flat spot is often denoted by a dot or a few dots raised on the plastic. 

 

A picture containing indoor, table, sitting, cup Description automatically generated

Begin to turn the crank and there will be downward force applied to the blade shaft.
Continue to do this until approximately 1/8” is left of the shaft.
The measurement left over on the force gauge is the bore force measurement.

 Each blade is assigned its own bore force specification.