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Hole making often involves sequential operations such as drill-then-tap. Combination tools that perform these operations simultaneously can eliminate tool changes, saving cycle time.
Many combination tools call for helical interpolation. For details of one such tool, click here.
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Media Player: 56k | 100K
Video shows the same series of holes machined first through drilling then tapping, then though drilling and tapping using a combination tool. Footage courtesy Mazak.
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