Precision Shaft Alignment for Gearboxes

Alignment should be verified after any maintenance activity that disturbs the gearboxes mounting position, after foundation repairs, and whenever vibration data suggests misalignment. Annual verification checks are recommended for critical equipment even without maintenance activities, since thermal growth, pipe strain, and foundation settling can shift alignment over time.

Alignment tolerances for gearboxes are typically set by the coupling manufacturer or equipment OEM and vary with operating speed. Higher-speed equipment requires tighter tolerances. Laser alignment systems measure to 0.001 mm resolution, achieving repeatability well within the tolerances specified by AGMA 9005 and API 613 and coupling manufacturers.

The Industrial Gearboxes failure population is dominated by gear tooth wear, bearing degradation, oil contamination. Each leaves a different signature: iron rising in oil, mesh sidebands, temperature drift. Precision Shaft Alignment captures these via angular and offset misalignment to OEM spec and trends them over the alignment on install and after any disturbance schedule. Early-stage indicators appear before functional failure — the lead time runs immediate (event-driven) on most modes.

Three triggers. First: rising trend on any key measurement (vibration amplitude up 30 percent over six months, wear metals climbing, IR megger declining). Second: a recent repair on the asset — post-repair baseline needs reconfirmation. Third: a process upset that may have exposed the equipment to conditions outside design (overload, contamination, thermal event). Any of the three justifies a 60-90 day check instead of waiting for the next scheduled alignment on install and after any disturbance round.