Tap with tapered thread
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United States of America Patent
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-
May 12, 1992
Issued Date -
N/A
app pub date -
Aug 22, 1991
filing date -
Jan 19, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
There is a tap having a tapered threaded portion 2 whose thread teeth 4 located in the tapered section are provided with a relief arranged at a clearance angle. It is desirable that the cutting moment and friction should decrease to the back towards the greater diameter. This is achieved in that the clearance angle of the thread teeth 4 in the tapered section 2 remains constant or increases towards the back. A simple machining measure permits the cutting moment and friction to be variably controlled over a wide range.
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