Systems, apparatus, and methods may be adapted for grafting tissue at a tissue site that may include an elongate housing and a plurality of elongate cutting members. The plurality of elongate cutting members may define a cutting surface at a distal end of the elongate housing. The cutting surface may be adapted to contract from a first diameter to a second diameter that is less than the first diameter. The contraction of the cutting surface from the first diameter to the second diameter may define a tapered profile between the first diameter and the second diameter suitable for obtaining a tapered graft.

A deburring tool with a deburring blade (9) for deburring borehole edges (3, 6) that have a straight or un-round shape, consisting of a base body (12) which is rotatably driven about its longitudinal axis (50), and at the lower end of which at least one blade holder (20) with at least one deburring blade (9) secured therein is mounted on a blade bearing (27) on the side of the base body so as to swivel vertically, and on the outer periphery of the blade holder (20) a control groove (31) which is open radially outward is arranged, into which the freely flexible end (30a) of a flexible spring (30) engages, the other end of said spring being clamped to the base body (12), wherein during the deburring process, the deburring blade (9) is swiveled away from the base body (12) at an angle (51, 52, 53) in relation to the longitudinal axis of the base body (12), and the blade axis (55) of the deburring blade (9) rests, spring-loaded, with its at least one cutting edge (39) against the borehole edge (3, 6) to be deburred, and executes spring-loaded swiveling movements that follow the contour of the borehole edge (3, 6) as the deburring tool is rotated, wherein the blade axis (55) of the deburring blade (9), in the home position in which it is swiveled away from the base body, forms an angled swivel position (52, 53) that deviates from the 90-degree position, and in that a backstop is assigned to the deburring blade (9), which prevents it from swiveling back into the position in which it is swiveled at a 90-degree angle from the base body (12).

A power tool accessory includes a shank member having a first hardness. A conically-shaped body is coupled to the shank member and includes a series of stepped shoulders that increase in diameter from a tip portion to a base portion. A flute extends substantially from the tip portion to the base portion, with cutting edges defined at the intersection of the flute and the shoulders. The body has a second hardness greater than the first hardness.

A hole cutter assembly is operable to cut a plurality of different sized diameter holes in a work piece. The hole cutter assembly includes an arbor configured to connect to a power tool for rotation about an axis, and a body coupled to the arbor for rotation with the arbor. The body defines an aperture. The hole cutter assembly includes a drill bit removably received in the aperture of the body for rotation with the arbor, an arm moveably coupled to the body, and a cutting blade coupled to the arm and moveable with the arm relative to the body. The arm is moveable relative to the body to adjust a cutting diameter of the hole cutter assembly when the drill bit is not received within the aperture. The arm is fixed relative to the body when the drill bit is received within the aperture.

Systems, apparatus, and methods may be adapted for grafting tissue at a tissue site that may include an elongate housing and a plurality of elongate cutting members. The plurality of elongate cutting members may define a cutting surface at a distal end of the elongate housing. The cutting surface may be adapted to contract from a first diameter to a second diameter that is less than the first diameter. The contraction of the cutting surface from the first diameter to the second diameter may define a tapered profile between the first diameter and the second diameter suitable for obtaining a tapered graft.

A drill includes a substantially cylindrical cutting portion includes a first region located at a front end portion, and a second region which has a step whose diameter increases as going from the first region to a rear end in a sectional view perpendicular to a rotation axis, and which is continuous with the first region in an end of the second region on a side of the step, and using this drill, a method of manufacturing a machined product is provided.

A deep hole drilling system and methods provide stability and cutting performance to produce deep holes having desired straightness. The system may include a replaceable cutting head provided with a center cutting member and first and second side cutting inserts. The tool provides a major diameter with the OD cutting margins on the replaceable side inserts, as well as possibly cutting margins on the center cutting member. Adjustment mechanisms are provided to adjust the center cutting member and/side cutting inserts.

A hole cutter assembly is operable to cut a plurality of different sized diameter holes in a work piece. The hole cutter assembly includes an arbor configured to connect to a power tool for rotation about an axis, and a body coupled to the arbor for rotation with the arbor. The body defines an aperture. The hole cutter assembly includes a drill bit removably received in the aperture of the body for rotation with the arbor, an arm moveably coupled to the body, and a cutting blade coupled to the arm and moveable with the arm relative to the body. The arm is moveable relative to the body to adjust a cutting diameter of the hole cutter assembly when the drill bit is not received within the aperture. The arm is fixed relative to the body when the drill bit is received within the aperture.

A method employing an apparatus in conjunction with a hammer-drill to penetrate composite metal and non-metal structure or structures including, for example, thick metal or rebar encountered during concrete, rock or masonry boring operations without requiring a change in drill equipment.

A method employing an apparatus in conjunction with a hammer-drill to penetrate composite metal and non-metal structure or structures including, for example, thick metal or rebar encountered during concrete, rock or masonry boring operations without requiring a change in drill equipment.