Multiple Spindle Heads for Use with Different Pitch Taps
At times, tapping a pattern that has more than one pitch is required. An example is a square four bolt pattern that has two holes to be tapped 1/4-20 and two holes to be tapped 3/8-16. If a standard multi-spindle head that has all the output spindle turning at the same speed is applied, the 1/4-20 tap will feed at .050"/revolution and the 3/8-16 tap will feed at .0625"/revolution. The result will be tap breakage ever time. Solutions to this feed imbalance are available.
AutoDrill can provide replacement drilling heads for Commander, Johnson, Ettco, Centerline Centroid and many more. Our prices make rebuilding Commander, Johnson, Ettco, Centerline Centroid and many other brand multiple spindle heads uneconomical. When you need a replacement head for Commander, Johnson, Ettco or Centerline Centroid multi-spindle drill or tapping heads call AutoDrill.
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