Abstract: An apparatus for grinding cutouts in the ends of pipes has a pair of pulleys which carry a grinding belt. One of the pulleys is a driving pulley for the belt and the other pulley is a shaping pulley which cooperates with the grinding belt to form the cutouts. A pipe clamp is located near, and is movable towards and away from, the shaping pulley. The shaping pulley is interchangeable in order to permit changes in cutout size. To this end, a stub projects from either end of the shaping pulley and supports a ball bearing. The ball bearings are receivable in carriers having U-shaped openings so that the shaping pulley can be installed and removed by pushing the bearings into the openings and pulling the bearings out of the openings.

Abstract: An apparatus arranged for grinding, polishing, etc. with a closed loop 5 of grinding, polishing, etc. belt mounted on the output shaft of a motor 1 and driven by a rotating drive wheel 4. This loop belt 5 is intended to be applied against a workpiece which is to be machined by means of the loop belt 5, said closed loop 5 having loop portions differing from one another in a running direction. The loop 5 is steered by steering members 2:8, 9:10, 11 to adopt an essential L-shape and comprising at least two loop portions, of which the loop portion 5d which is arranged to make contact with said workpiece is preferably selected shorter than the other loop portion 5a, 5b, 5f, 5g.Said drive wheel 4 for driving of the belt 5 is arranged displaceable relative to a foundation 17 by a guide 19 steered by the foundation 17 and turnable by means of guide members 3 arranged on the guide. An angle .phi.

Abstract: A stone slab saw with multi-sectional guide bar comprised of a support frame, a continuous flexible belt supported by a multi-sectional guide bar system preferably comprised of an upper and lower guide bar, a wear strip secured in a slot in the lower guide bar, guide bar supports at each end of the upper and lower guide bars for securing the guide bars to the support frame and a primary and secondary tension adjustment elements for adjusting the tension of the upper and lower guide bars.

Abstract: The invention relates to an apparatus for grinding recesses into the ends of tubular workpieces with a revolving, driven grinding belt, the front pulley of which apparatus has a diameter that corresponds to the diameter of the desired recess in a tube end, which pulley can easily be exchanged. Moreover, the pipe to be ground is disposed on a support assembly constructed with a clamping device, which can in turn be rotated to permit the grinding of such tube ends at angles other than 90.degree..