Crane brake linings should be replaced when they reach the manufacturer’s minimum thickness, show signs of cracking, glazing, delamination, or contamination, or when braking performance becomes inconsistent even after correct adjustment. For overhead and gantry cranes, a practical replacement standard combines measured wear limits with condition-based indicators such as abnormal noise, overheating, or reduced holding capability.
To set a reliable standard, start with OEM minimum thickness and inspection intervals based on duty class. Record initial thickness, measure at multiple points to detect uneven wear, and track wear rate over time to predict replacement windows. For safety-critical hoisting brakes, adopt a conservative threshold—do not wait until “almost gone.” If you use wear switches or inspection windows, calibrate them to the real limit.
After replacement, always adjust air gap/clearance to spec, perform functional tests under controlled load, and document the maintenance action. Consistent standards reduce downtime and prevent last-minute, high-risk interventions.