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US 8,057,135 B2Granted
Auger bit with interlocking feed screw and cutting insert
AssigneeGreenlee Textron Inc.
InventorsWilliam Nordlin, Peter Czyzewski
Life of this patent
Estimating the term…
Abstract
An auger bit includes a shaft having a central axis, a cutting insert mounted to said shaft, and a feed screw that is separate from the cutting insert and which is mounted to the shaft. The cutting insert and the feed screw are engaged with each other. A single locking member, such as a set screw, secures the feed screw member to the shaft, and thereby secures the cutting insert to the shaft. If the feed screw or the cutting insert become worn, feed screw or the cutting insert can be replaced.
Claims15
An auger bit comprising:
- a shaft having a central axis, a first passageway having a central axis which is angled at an acute angle relative to the central axis, said first passageway at least partially passing through said central axis, and a second passageway which is concentric with said central axis;
- a cutting insert mounted to said shaft in said first passageway;
- a feed screw that is separate from the cutting insert, said feed screw mounted to said shaft in said second passageway, said cutting insert and said feed screw engaged with each other;
- and
- a locking member securing the feed screw member to the shaft.
2 more elements
A shaft for a cutting tool comprising:
- a continuous land and flute extending from a leading end to a trailing end, a shaft central axis extending between said leading end and said trailing end, a first passageway having a central axis angled relative to said shaft central axis, said first passageway at least partially passing through said shaft central axis, said first passageway having a diameter, and a second passageway having a central axis which is aligned with said central axis of said first passageway, said first and second passageways commencing at diametrically opposed positions along said shaft, said second passageway having a diameter which is smaller than said diameter of said first passageway.
An auger bit comprising:
- a shaft having a central axis, a first passageway which has a central axis which is angled relative to the central axis of said shaft, said first passageway at least partially passing through the central axis of the shaft, a second passageway which is concentric with said central axis of said shaft, and a third passageway which is smaller in dimension than said first passageway and which intersects with said first passageway;
- a cutting insert mounted to said shaft in said first passageway;
- a feed screw that is separate from the cutting insert, said feed screw mounted to said shaft in said second passageway, said cutting insert and said feed screw engaged with each other;
- and
- a locking member securing the feed screw member to the shaft.
2 more elements
An auger bit comprising:
- a shaft having a central axis;
- a cutting insert mounted to said shaft, said cutting insert includes a generally cylindrical body with a central axis having a first end and a second end, cutting edges formed on said first end, and a groove having a central axis that forms a forty-five degree angle with said central axis of the body;
- a feed screw having a shaft, said feed screw is separate from the cutting insert, said feed screw mounted to said shaft, said cutting insert and said feed screw engaged with each other such that said shaft of said feed screw is positioned within said groove in said cutting insert;
- and
- a locking member securing the feed screw member to the shaft.
2 more elements
Dependencies are inferred from the claim text.