Page 373 - Intro Predictive Maintenance
P. 373
364 An Introduction to Predictive Maintenance
Figure 16–3 A typical calibration
label.
Figure 16–4 A typical calibration card.
If the forms are sorted every month, the cards for each instrument that should be
recalled for check or calibration can easily be pulled out.
Alignment Practices
Shaft alignment is the proper positioning of the shaft centerlines of the driver and
driven components (e.g., pumps, gearboxes) that make up the machine drive train.
Alignment is accomplished either through shimming or moving a machine compo-
nent. Its objective is to obtain a common axis of rotation at operating equilibrium for
two coupled shafts or a train of coupled shafts.
Shafts must be aligned as perfectly as possible to maximize equipment reliability and
life, particularly for high-speed equipment. Alignment is important for directly
