TAPPI TIP 0304-47 2012: Corrugator Bearing Clearance Checks and Their Impact is a focused technical guide for corrugator maintenance and quality professionals. This five-page PDF explains how to measure bearing clearance using a dial indicator, magnetic base, and lifting tool while emphasizing correct equipment positioning and safe lockout/tagout practices.
The document covers hot and cold roll checks, bearing movement tolerances, inspection procedures for corrugator and single-facer components, and practical guidance for evaluating both operator and drive sides. It also describes symptoms of worn bearings, including speed-dependent board waves, vibration, and bonding defects, and provides a method for relating defect spacing to a possible roll diameter. General limitations and factors affecting replacement decisions are also discussed.
Application Scope: Suitable for corrugated box plant maintenance teams, machine operators, reliability engineers, and quality personnel performing bearing inspections, troubleshooting board defects, or establishing corrugator maintenance practices.
