OLICNC Machine Tools HSK63 100 Shank Test Rods Machine Spindle Test Bar Mandrel Measure Spindle Test Rod Bar for Accuracy Detection   Spindle accuracy test rod One: product function 1. Cooperate with the machine tool manufacturers to install the spindle correctly to ensure that the accuracy is in place when the spindle is installed; 2.It is convenient for each machine tool user to check the spindle accuracy in time. Two: product quality 1. The test rod is made of special material to prevent deformation; 2. All have passed the roundness test and passed the exact inspection;