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US 11,407,047 B2Granted
Reamer
AssigneeA.L.M.T. Corp.
InventorsSakuya Tanaka, Koji Sawa
Life of this patent
Estimating the term…
Abstract
A reamer includes a core, a plurality of outer-circumference cutting edges provided on an outer circumference of the core and made of a hard tool material, and a margin provided on a rear side of each the plurality of outer-circumference cutting edges in a rotational direction. A distance from an axis of rotation to a position of a center of gravity of the reamer is greater than 0.01 mm and not greater than 0.5 mm.
Claims2
A reamer comprising:
- a core made of a cemented carbide;
- a plurality of outer-circumference cutting edges provided on an outer circumference of the core and made of a hard tool material;
- and
- a margin provided on a rear side of each of the plurality of outer-circumference cutting edges in a rotational direction,
- wherein a distance from an axis of rotation to a position of a center of gravity of the reamer is greater than 0.01 mm and not greater than 0.5 mm,
- a width of the margin in the rotational direction is not less than 0.05 mm and less than 0.5 mm, and a surface roughness Ra of the margin is not less than 0.01 μm and less than 0.3 μm,
- a number of the plurality of outer-circumference cutting edges is 3 or more and 5 or less, and
- a tool diameter of the reamer is 8 mm or more and 43 mm or less.
5 more elements
Dependencies are inferred from the claim text.