Fluted tap

Details Fluted tap Fluted tap

1981-10-02

1984-07-31

Combs, E. Michael

Cutting by use of rotating axially moving tool

Tool or tool with support

With pitch-stabilizing ridge

10141R, 408230, B23G 506

Patent

active

044627270

ABSTRACT:
A fluted screw tap has a plurality of thread lands each with a pair of outwardly facing flanks. Each flank of a pair has a different asymmetric relief ground flank surface extending in a spiral form along the length of the thread land. Each thread land has a corner resting against the cut thread. Each of the flank surfaces in a pair has a different relief grinding angle extending along the threaded flank and the angle approaches the zero value at the end of the thread land where the corner resting against the cut thread is located.

REFERENCES:
patent: 194469 (1887-08-01), Schaub
patent: 250728 (1881-12-01), Harvey
patent: 1309232 (1919-07-01), Ahond
patent: 1365338 (1921-01-01), Muth
patent: 1408205 (1922-02-01), Jfanger
patent: 1953528 (1934-04-01), Bysshe et al.
patent: 1958105 (1934-05-01), Koehler
patent: 2816302 (1957-12-01), Bauer

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