Boring is machining technology of further processing the forged, cast or drilled holes that already exist in the workpiece, boring can enlarge the hole, increase its diameter, improve dimensional accuracy, reduce surface roughness and correct the deviation of the original hole axis. The accuracy and precision of boring are high, the accuracy of precision boring can be controlled within 0.01mm, the surface roughness of general boring process is roughly between Ra 1.6 ~ 0.8 μ M.
In our machine shop we have two manually operated boring machines. One goes up to 1500 mm diameter and for the larger equipment we can go up to 3500 diameter.