Indexable spade drill blade

Details Indexable spade drill blade Indexable spade drill blade

1980-01-09

1982-10-26

Bilinsky, Z. R.

Cutting by use of rotating axially moving tool

Tool-support with means to permit positioning of the tool...

Pivotable tool

175383, 407 54, 408233, 408713, B23B 2716, B23B 5106, E21B 1052

Patent

active

043559328

ABSTRACT:
The present invention relates generally to spade drills and more particularly to an indexable spade drill blade which is adapted to be clamped in the clamp slit of a boring bar or holder and which may be readily reversed so that an unused cutting edge may be brought into play for further boring when wear has taken place on the cutting edges. Essentially the spade cutting blade is formed with an eccentric to permit indexing and must be used with an appropriate boring bar or holder which has a shape such that the cutting point of the eccentric blade is brought on the shank center line of the boring bar or holder.

REFERENCES:
patent: 1365683 (1921-01-01), Griffith
patent: 2621548 (1952-12-01), Williams
patent: 3333489 (1967-08-01), Mossberg
patent: 3629919 (1971-12-01), Trevarrow, Jr.
patent: 4047826 (1977-09-01), Bennett
patent: 4060335 (1977-11-01), Holloway et al.
patent: 4083644 (1978-04-01), Friedline
patent: 4115024 (1978-09-01), Sussmuth

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