Hydraulic workholding | Arbors and Chucks | Gear-grinding As the world strives for quieter more efficient gearboxes, gear grinding is becoming more and more critical in the production of precision gears. CONCENTRICTM Rotary are able to design and manufacture hydraulic arbors & Hydraulic Mandrel to suit a range of gear grinding machine tools, giving the flexibility and extreme accuracy demanded by today’s gear producers. Precise and repeatable gear geometry, typically to ‘master gear’ tolerances, is produced using these extremely reliable arbors. The operator friendly nature of the arbor allows easy loading of the part and good rigidity without the need for time consuming end clamps and nuts often associated with solid type tooling. . CONCENTRICTM Rotary also produce hydraulic arbors for gear honing, hobbing and shaving operations.