How to ensure threaded fastener reliability in an industrial gearbox
Industrial gearboxes play an important role in processing and manufacturing facilities. For plant professionals, the ultimate goal is to maximize machinery output, reliability and efficiency. That’s why a gearbox failure can be a costly setback to overall plant operations. Proactive maintenance will minimize expensive downtime, enhance reliability and dramatically cut costs.

Common challenges related to
threaded fasteners in a gearbox

Apparent causes behind these challenges

  • VibrationsVibrations
  • thurmal-fluctuations Thermal fluctuations
  • Tough operating conditionsTough operating conditions

Root Cause

There are gaps between engaging threads, with only 15% metal to metal contact, while the rest of the 85% is air. This air gap allows

  • Vibration to cause side-to-side motion leading to self-loosening
  • Differential expansion and contraction of substrates due to service temperature changes
  • Corrosive environment to attach the metal fasteners

loctite solution

Loctite 243

Medium strength threadlocker that fills all the gap between the engaging threads and solidifies to unitize them, thereby

  • Preventing self-looseningPreventing self-loosening
  • Sealing against corrosionSealing against corrosion


  • Correct clamp load is maintained
  • Easy and consistent
  • Proper gearbox reliability ensured