Abstract: Device for making sections for specimens and specimen support therefor, namely for thin sections and ground surfaces of metallographic specimens for microscopic analyses. The device includes a rotatable polishing wheel with at least two of the specimen supports disposed thereabove, and frictional drive means centrally located with respect to the wheel, wherein the specimen supports have assigned thereto at least one roller for driving a pair of adjacent supports, the latter as well as the rollers having complementary engaging peripheral surfaces that are partly cylindrical and partly conical, and means for adjusting the location and degree of interengagement between the respective surfaces.

Abstract: Device for mounting specimens for the purpose of lapping, grinding and polishing metallographic specimens for microscopic analyses, comprising a rotatable polishing wheel with a number of specimen holders disposed thereabove, a driving roller centrally located with respect to the wheel and at least one supporting roller for each specimen holder, the rollers having wedge grooves engaged by peripheral edge portions of the specimen holders, and adjustable pressing members in the specimen holders for exerting pressure on the specimens and for maintaining proper frictional contact between the wedge grooves and the peripheral edge portions which constitute a frictional drive.