Router cutting bit

Details Router cutting bit Router cutting bit

1989-09-25

1993-01-05

Kisliuk, Bruce M.

Cutters, for shaping

Rotary cutting tool

Having peripherally spaced teeth

407 61, B23C 510

Patent

active

051764768

ABSTRACT:
A router bit for providing smooth finish cuts in soft metal, such as aluminum, includes a plurality of helical cutting edges that are disposed at a helix angle of 45 degrees. The cutting edges each include a cutting face having a positive rake angle of approximately 18 degrees, and a land portion having a primary relief angle of approximately 14 degrees, and a secondary relief angle of approximately 20 degrees. The bit shank is preferably 3/8 inch in diameter to increase rigidity. The combination of these specific angles and the shank diameter provides a cutting bit that can cut soft aluminum with a resultant finish that meets or exceeds aircraft industry standards.

REFERENCES:
patent: 3106191 (1963-10-01), Newman
patent: 3736634 (1973-06-01), Sonnie
patent: 4212568 (1980-07-01), Minicozzi
patent: 4231693 (1980-11-01), Kammeraad
patent: 4285618 (1981-08-01), Shanely, Jr.
patent: 4497600 (1985-02-01), Kishimoto
patent: 4560308 (1985-12-01), Deller
patent: 4572714 (1986-02-01), Suzuki et al.
patent: 4721421 (1989-06-01), Klinger

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