Forming roll

Claim 1

In a mill, such as a rod mill haVing a frame, a shaft rotatable in the frame with one end projecting from the frame and a roll mounted on the projecting end of said shaft; said projecting end of said shaft having a portion in the axial plane of said roll which tapers inwardly in the axially outward direction and a shoulder between the tapered portion and the frame, said roll having a cylindrical central bore larger in diameter than the largest diameter of said tapered portion of said shaft, said roll on the side facing said frame abutting said shoulder, a sleeve element having an axially split region tapered on the inside and cylindrical on the outside, said region of said sleevE being disposed in the bore in said roll and about the tapered portion on said shaft, a pair of diametrically opposed radial notches in the side of the roll facing away from said frame, each said notch extending radially completely through the respective end portion of the said roll, a diametral recess in the outer end of said shaft, a bar-like key extending through said recess with axial clearance from the side of said recess nearest said frame and having each end terminate in a protruding lug portion seated in said notches, each said lug portion engaging substantially the entire radial and circumferential surface at the axially inner end of the respective notch, first means carried by said shaft and operable for forcing said key in the axial direction of said shaft toward said roll to clamp the roll against said shoulder, and second means also carried by said shaft and operable for forcing said sleeve axially on said shaft to wedge the said region thereof between said roll and said tapered portion of said shaft, said roll comprising a solid body of hard cemented carbide material.