How does the crank gage work?
Like the spindle master gage, the crank master gage is essentially a perfect spindle that fits into the crank and contains measurement lines allowing the determination of the amount of pre-load for the crank. This tool does not measure the shape of the splines in the crank it only gives an indication of the magnitude of pre-load the crank possesses. This tool is double ended, so manufacturers can press GO/NO-GO stops onto the tool and thus have a GO/NO-GO tool for determining whether the pre-load is within their required range.
