An initial undersized hole was drilled using any of the methods they suggest which produce no concentric rings. Then a single point boring tool was used to machine the hole to its final dimension. The hole tapers 1 cm over its length. 0.5 cm of wear of the single point tool in use would account for the decrease in diameter.
An initial undersized hole was drilled using any of the methods they suggest which produce no concentric rings. Then a single point boring tool was used to machine the hole to its final dimension. The hole tapers 1 cm over its length. 0.5 cm of wear of the single point tool in use would account for the decrease in diameter.