Deep hole boring with [+ or -]5[micro] accuracy.

Position:Drilling and Boring Machinery - Brief Article
 
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The BOA (Boring with Optimal Accuracy) uses a "Smart" tool that delivers [+ or -]5[micro] accuracy at depths up to 30 times the machined diameter, with the flexibility to handle bore diameter ranging from 25mm to 75mm within a 250mm by 250mm work zone. An inverted spindle and feed axis allow the tool changer to be mounted...

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