HARDINGE DOVEY AIL BED Hardened and Precision Ground Steel Bed Ways Resist Wear Solid Construct i on - No Weakening Holes or Slots Chips Cannot Fall on Angular Guide Ways Easy to Clean - No Slots or Under Cuts to Wedge Chips Proved Design - Used for Years on Hardinge Chucking Machines Analytical consideration of bed construction for opposing cutting strains brought about the dovetail carriage and bed design. Many years ago, Hardinge solved the accuracy and proper finish needs of the optical. camera, projector and range finder manufacturers. This was done with our high speed precision chucking machines having dovetail carriage and bed construction.
Because of the design of the Hardinge bed, there can he no lifting action of the carriage as the hack 30° way changes the "pushing away" force into a "pulling down" action, thus ensuring bearing surfaces on the 30° hack way and the top way. On the other hand, the conventional bed design results in a lifting action as the conventional inverted vee way changes the "pushing away" action into a "lifting up" action, hence reducing the number of bearing surfaces. lifting action in the conventional bed design is admitted by the many "hold down" bolted sections for the carriage. This lifting action of the carriage causes chatter which means vibration and wear.
Because there is no lifting action in the Hardinge construction, there is a steady support to bring about accuracy and fine finish. Further, the Hardi nge construction covers the angu lar ways so that chips cannot collect on the gUide-way surfaces. I J The heavy box section bed Is made of a seasoned alloy semi-steel casting. The Hardinge dovetail bed ways are made of alloysteel, hardened and precision ground for sustained accuracy. Between the self-contained bed and the welded steel pedestal base there are three spherical seats. Two of these spherical seats at the headstock end of the bed and one spherical seat at the tallstock end provide a three point bearing for sustained accuracy. 12