Abstract: The invention relates to a plowing device having a plow chain which is guided inside a channel (2) having an inner radius (A1) and the chain links of which each have chain bends (5) and chain limbs (6) connecting the latter. In cross section, the chain limbs (6) each have an outside radius that extends along a chord length, wherein the inner radius (A1) of the channel (2) and the outer radius of the chain limbs (6) have a ratio of 1:0.8 to 1:1.2 in relation to one another.

Abstract: The invention relates to a plowing device having a plow chain which is guided inside a channel (2) having an inner radius (A1) and the chain links of which each have chain bends (5) and chain limbs (6) connecting the latter. In cross section, the chain limbs (6) each have an outside radius that extends along a chord length, wherein the inner radius (A1) of the channel (2) and the outer radius of the chain limbs (6) have a ratio of 1:0.8 to 1:1.2 in relation to one another.

Abstract: In a method of making a chain, in particular a round steel chain of tempered steel, a chain strand is produced in a conventional manner and subject to the usual heat treatment of normalizing, hardening and annealing. Annealing is implemented at a low temperature level of below 200° C. A tempered steel is used having a microstructure which, after hardening and annealing, has a stable residual austenite content between 3% and 10%. After the final calibration process, the chain strand is subjected to a thermal aftertreatment at a temperature between 190° C. and 250° C. This relieves stress resulting from the calibration process and the associated work-hardening. In this way, the notch impact energy capacity is enhanced.

Abstract: In the scraper for chain bands of double-center chain scraper conveyors, the chain shackle is shaped in such a way in the direction of the scraper longitudinal axis that, during mounting with an inserted double-center chain, the chain shackle first comes to bear on those two legs of the horizontal chain links located towards the center of the scraper, in order, when the screw connection is tightened further, additionally to clamp the outer legs of the chain links. When a defined mounting force has been reached, the inner and outer chain-link legs are clamped with the same force. The concave curvature of the shackle, in contrast to the straight shackle, prevents the shackle from lifting off from the inner chain-link legs due to the bearing effect of the outer chain-link legs. An always uniformly distributed and permanently firm and reliable chain clamping is thereby guaranteed.