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Bridge Bars and Jumbo bridge bars

Seco® has a complete range of Bridge Bars and Jumbo Bridge bars for large diameter boring, overturning and grooving.

Bridge bars

  • 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
    Bridge bars with through coolant - 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,
    - Seco unique on the new A731S bridge bars: through coolant supply (upto 70 bars) directly to the cutting edge.

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