Каталог оснастка Dormer Pramet 2016 - страница 269

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QUICK-CHANGE TAPPING CHUCKS

The process of tapping is a complex balance of rota-the leading or trailing flanks of the tap may be forced
tional and axial movements of the tool. It is sometimesto progressively “shave” one flank of the component
necessary to restrict the axial movements of the tool.thread, thus producing a thin and oversize thread in
If the axial movement is not accurately controlled,the component.

Tension – forward float capability allows the tap to progress into the component without interference from the axial feed of the machine spindle.

Compression – backward float capability, acts as a cushion and allows the tap to commence cutting at its own axial feed independent of the machine spindle.

Compression/Tension – float is designed to negate any external forces during the machining operation.

Radial float – allows for slight misalignment of the machine spindle axis and hole axis prior to tapping. This is not recommended manufacturing practice and should be avoided.