Abstract: A gripping system is provided comprising: gripping fingers of a first type, gripping fingers of a second type, a gripping device for handling sample containers, wherein the gripping device comprises base portions, wherein a gripping finger of the first type and a gripping finger of the second type are releasably fixable to the base portions, and a drive, wherein the drive is adapted to move at least one of the base portions relative to the other base portions to cause a gripping or a releasing of a sample container, and a gripping finger change device, wherein the gripping finger change device is adapted to store gripping fingers of the first type and gripping fingers of the second type, and wherein the gripping finger change device is adapted to replace a gripping finger of the first type fixed to a base portion by a gripping finger of the second type.

Abstract: The invention is directed to a composite crankshaft for a two-stroke engine for portable handheld work tools including chain saws, cutoff machines and the like. In composite crankshafts, a crank pin is connected to a crank web by a press fit wherein the inner diameter of the press-fit bore is expanded toward its axial end in order to reduce stress peaks. In this way, the press-fit surface has a radial spacing with respect to the center longitudinal axis of the press fit which changes. The press fit of the crankshaft of the invention is so configured that the radial distance of the press-fit surface changes in dependence upon the axial spacing to the axial center of the press fit according to an exponential function having the equation f(x)=a.multidot.e.sup.b.multidot.x wherein (a) and (b) are pregiven constants, (x) is the axial spacing and f(x) is the radial spacing.