Self-drilling connecting unit
First Claim
1. A self-drilling connecting unit comprising a shaft and a platelet-like cutting tool connectable to the shaft, the platelet-like cutting tool having on an end region thereof facing the shaft, at least one platelet-like protrusion lying in a plane of the cutting tool;
- an end region of the shaft bearing the cutting tool and having a central opening of a cross-section selected from circular, elliptical and polygonal cross section, said at least one protrusion being insertable into the central opening with a press fit for centering and force-fit mounting of the cutting tool to the shaft and being braced in the central opening against two diametrically opposing boundaries of an inside wall of the central opening.
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Accused Products
Abstract
A self-drilling connecting unit includes a shaft and a platelet-like cutting tool attachable to the shaft in a form- and/or force-fitted manner. The platelet-like cutting tool has a platelet-like protrusion lying in the plane of the cutting tool in its end region facing the shaft. The end region of the shaft, which bears the cutting tool, has a central opening. The protrusion of the cutting tool is insertable into the opening of the shaft and is braced by a pressure seat in the opening against two diametrically opposed boundaries of the inner wall of the opening whereby a sufficient mount and an exactly axis-parallel alignment of the cutting tool against the shaft are provided.
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Citations
17 Claims
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1. A self-drilling connecting unit comprising a shaft and a platelet-like cutting tool connectable to the shaft, the platelet-like cutting tool having on an end region thereof facing the shaft, at least one platelet-like protrusion lying in a plane of the cutting tool;
- an end region of the shaft bearing the cutting tool and having a central opening of a cross-section selected from circular, elliptical and polygonal cross section, said at least one protrusion being insertable into the central opening with a press fit for centering and force-fit mounting of the cutting tool to the shaft and being braced in the central opening against two diametrically opposing boundaries of an inside wall of the central opening.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A self-drilling connecting unit comprising a shaft, a platelet-like cutting tool, the platelet-like cutting tool having several spaced platelet-like protrusions in an end region thereof facing the shaft;
- an end region of the shaft bearing the cutting tool and having a central, axially protruding lug of a cross-section selected from circular, elliptical and polygonal cross section and wherein for centering and force-fitted mounting of the cutting tool to the shaft, the protrusions of the cutting tool can be set on and braced on the lug against two diametrically opposed boundaries of an outer wall of the lug with a press-fit.
- View Dependent Claims (12, 13, 14, 15, 16, 17)
Specification