INSTALLATION
NA Series Operating & Instruction Manual
Page 10
A final alignment check should be made after the baseplate has been grouted and set, and the
foundation bolts have been tightened.
TYPE
DISPLACEMENT
GAP
Short flexible coupling
(3000 rpm)
0.05 mm
0.04 mm per 100 mm
coupling diameter
Flexible spacer coupling
(3000 rpm)
0.07 mm per
100 mm spacer length
0.04 mm per 100 mm
coupling diameter
Methods of checking alignment
Straight edge
Using a straight edge, check the distance from the shaft at several points on the circumference of the
coupling. The distances d1 and d2 should each remain constant.
IMPORTANT NOTE:
The straight edge method checks static coupling alignment, not shaft alignment.
It relies for its accuracy on the accurate alignment of each coupling half on its shaft. The straight edge
method is a useful preliminary check, but should not be seen as an effective final alignment method.
