Measuring Tool Factory Botou City Park taper BT60 test rods, 7:24 taper test rods, 7:24 ..

geometric precision bt test rods JB / T9981-99 standards for manufacturing according to test a variety of machine tools, high-quality carbon tool steel, machining after several heat treatment, precision grinding Face made. The main tool used to check the accuracy of the cone and a variety of CNC machine tools and precision instruments, and the spindle taper hole inspection. Specifications are divided into: bt30, bt40, bt50, bt60 like.