This is a Krikit V-belt tension gauge from Gates. Proper v-belt tension is important for belt and bearing life. This gauge can measure 30 to 150 lbs of tension on belts up to 7/8″ wide. Tests have shown that estimating is very inaccurate when adjusting belt tension.
Although newer vehicles usually have automatic belt tensioners, there are plenty of other things around the shop with v-belts. Compressors, blower drives, and shop machinery use v-belts. Use the manufacturer’s specifications for belt tension if available. I downloaded an iPhone app from Gates that can calculate belt tension.
I purchased my gauge from Amazon…
I shot a quick video to show how the gauge works.