Patent ID: 7621801

Claim:
A clamping device configured to effect axially aligned clamping onto a grinding spindle rotor, wherein the grinding spindle rotor defines a grinding axis, the clamping device comprising: a centering section extending from said grinding spindle rotor and coaxially aligned with said grinding axis; a rotary part including an interior recess having a peripheral recess wall; alignment contact portions arranged to coaxially align the rotary part on the centering section, the alignment contact portions consisting of three support bodies that are disposed projecting into said interior recess from said peripheral recess wall and disposed angularly displaced from one another along a circumferential direction of said interior recess; the interior recess and said three support bodies being configured to accept the centering section between the three support bodies so as to coaxially align the rotary part with the grinding axis by positioning the rotary part on the centering section via said three support bodies; the three support bodies consisting of two fixed projections fixed relative said rotary part that project into the interior recess of the rotary part, and a third support body which is an adjusting member that is movably carried in said rotary part for movement thereof between a radially outward position and a radially inward centering position adjusting the rotary part to be coaxially aligned with said grinding axis, said centering position being adjacent to said centering section; said two fixed projections presenting a contour engaging the centering section, the contour being convex arch with an axial extending apex configured to engage the centering section along an area limited to substantially a linear contact area; and a detachable device for axially clamping the rotary part on the grinding spindle rotor.