• The Bridge Bar range covers diameters 204 to 655 mm (8.03 to 25.78 inches)
• The Jumbo Bridge Bars are made of high tensile aluminium with steel interfaces cover the 654 - 2155 mm (25.75 to 84.843 inches) diameter range 
   
• Precision and reliability
  - Excellent rigidity - strong design (boring blocks clamped within the Bridge Bar, Bridge Bars clamped within the Jumbo body)
  - Easy assembly and adjustment of the blocks using a cam driving mechanism
  - Better results than e.g, milling by interpolation: better quality,
  lower machining times, less stress on machine spindle
• Flexibility
  - Large range of diameters as standard products
  - Modular concept - Jumbo Bridge Bars use standard Bridge Bars and boring blocks
  - Symmetrical or staggered boring possible for rough boring
  - Large OD-overturning possible
  - Same insert holder for roughing and finishing
• User friendly
  - Rough and fine boring using the same Bridge Bar
  - Micrometric screw on the side of the bars for easy access and setting
  - Angular orientation every 30 degrees for easy storing in machine magazines.

Read more about Bridge bars boring heads in Machining Navigator/Holemaking.