Page 319 - Machinery Component Maintenance
P. 319
Balancing of Machinery Components 301
b
1
..s
0.1
0.0s
e. 01
0.00s
0.0.1
0.000 5
0.00.1
0.00. os.
0.0.0*1.
o.mo.4
NOTES:
(1) In general, for rigid rotors with two correction planes, one half of the recommended residual
unbalance is allowed for each plane; these values apply usually for any two arbitrarily chosen
planes. (See paragraph on Applying Tolerances to Two-plane Rotors). For disc-shaped rotors
the full recommended value applies to one plane.
(2) To obtain acceptable residual unbalance in oz-in per Ib of rotor weight multiply Ib-in value by
16.
(3) To avoid need for multiplication use appropriate Balance Tolerance Nomogram on following
pages.
Figure 6-33. Maximum permissible residual specific unbalance corresponding to various
balancing quality grades "G," in accordance with IS0 1940.
