Measuring the Bush with a Calliper Tighten Callipers to rest at the centre of the bush and the worn surface. Measure both forward and reverse wear surfaces Use the ruler to measure the callipers tip gap. Was this article helpful? Yes No Related Articles Caterpillar – Track Roller How to Measure Excavators – Download Measuring the Sprocket with Callipers Measuring Track Roller with Depth Gauge Measuring the Track Roller with Callipers Measuring the Track Roller with UT Need Support?Can't find the answer you're looking for?Contact Support