Right NOW accuracy is more important than ever! Saving YOU money. Concentric Engineering . has a long history of supplying customers with high quality work holding technology, hydraulic expanding jelly mandrel, hydraulic colet, hydraulic lock nut, hydraulic shaving mandrel, gear grinding mandrel, gear teeth grinding mandrel, Gear hobbing Fixture, Pin cage for Gear Bore Grinding WRT gear PCD with peerless accuracy. Our product's specifications provide you with many cost saving measures that are often over looked such as less rejected parts, shorter takt time and minimal set-up time. The inherent accuracy and quality of our products allows them to run for longer and if they are maintained correctly, they will see you through the most demanding manufacturing tasks. Simply put, accuracy and dependability saves you money........ Engineer YOUR Future.