Sunnen Deep Hole Drilling - Double Tube Drilling

DirectDex line of Deep Hole Drilling Tools & Inserts

Sunnen has leveraged our expertise in precision bore sizing and finishing to expand into deephole drilling with our own line of deep hole drilling machinery as well as Sandvik-style tools, carbide inserts and accessories, including replacement parts for many of the discontinued Sandvik product lines. Sunnen’s DirectDex series is a replacement for the Sandvik CoroDrill 800 product line.

DirectDex indexable drill head

DirectDex indexable drill heads cover a diameter range of 25 mm - 65 mm (0.984" - 2.559") and are designed with robust pressed carbide inserts available in multiple carbide grades, coatings and chip breaker designs.

Our solutions provide the following benefits:

  • Close diameter tolerance and high quality surface finish
  • Low cost per hole
  • Consistent performance within a wide application range and across a variety of materials
  • A few replacement parts cover the entire diameter range
  • Excellent chip control in both low and high feeds

Sunnen drilling products meet the hole producing needs of various industries including:

  • Oil & Gas industry: downhole equipment, kellys and stringers
  • Aerospace industry: landing gears, struts and cylinders
  • Heat exchanger manufacturers: tube sheets
  • Tube producers: drilling billets for extrusion
  • Automobile industry: molds and various shafts
  • Armament industry: gun and cannon barrels
  • Cylinder manufacturers: hydraulic cylinders
  • Ship building industry: propeller shafts
  • Drilling job shops: various components

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