Abstract: A radial ply tire (10) has a belt assembly (21) of at least two belt plies (22, 23). At least one of the belt plies has at least one folded portion (24, 25), such that there is at least one folded portion of a belt ply on each lateral side of the belt assembly. A spirally wound strip (26) of a cord reinforced elastomer extends transversely between the folded portions (24, 25).

Abstract: A tire tread (11) comprises first and second straight grooves (30, 31) which extend circumferentially about the tire, one of said straight grooves being disposed on either side of the equatorial plane (EP) of the tire and delimiting a central portion and two shoulder portions. A plurality of laterally extending zig-zag grooves (32, 37; 33, 34) on either side of the equatorial plane each comprises two sets of legs, a first set of three legs (32A, 32B, 32C) extending across the shoulder portion and a second set of two legs (32D, 32E) extending into the central portion, the first and second sets of legs being circumferentially offset by said straight circumferential groove.

Abstract: A turning tool comprises a shank and a separate extension member to which a cutting tip is attached. The extension member has at its rear side a convex cylindrical surface which extends over an arc of approximately 180.degree. and to which the sidewalls are tangent. That surface is brazed, welded or fixed by an adhesive to a concave cylindrical surface provided at the front end of the shank.

Abstract: A shank has a support surface for an apertured reversible cutting element and has a hole opening into the support surface at an acute angle. A clamping stud has a clamping head which is engageable in the aperture of the cutting element and has a shaft which is displaceably guided in the hole in the support surface. A control screw is adjustably mounted in the shank beside the shaft of the clamping stud, in operative engagement with the shaft. An annular groove on the surface of the control screw is engaged by the single tooth formed in the shaft of the clamping stud by two milled recesses. The control screw has smooth-walled cylindrical peripheral surface portions on both sides of said groove which are in engagement with the bottom surfaces of said recesses.