Abstract: A roller for use in devices configured to comminute material has a wear surface. The wear surface comprises inserts that are spaced apart differently to provide a desired wear characteristic in the wear surface. In one embodiment, some inserts may also have diameters or widths that are smaller than other inserts. For example, columns of inserts adjacent an end of the roller may have diameters that are smaller or larger than inserts in columns located near the center of the roller or otherwise positioned between the two ends of the roller. As another example, a middle portion of the wear surface may have inserts that include inserts of a larger or smaller diameter than inserts adjacent the ends of the wear surface.

Abstract: A reducing component is disclosed herein. The reducing component includes a block-style reducer including a height, a width and a depth. The block-style reducer includes first and second ends separated by the height, first and second sides separated by the width and front and back sides separated by the depth. The block-style reducer also includes a first reducing edge that extends across the width of the block-style reducer at a location adjacent to the first end of the block-style reducer. The reducing component also includes a blade-style reducer that projects forwardly from the block-style reducer at a location adjacent the second side of the block-style reducer. The blade-style reducer includes a second reducing edge that extends primarily along the height of the block-style reducer.

Abstract: To produce flour and/or semolina, raw material is fed into a feed opening of a roller press. The milling gap of the roller press is fixed, or damping of at least one of the rollers with respect to the lateral deflection is set, such that a first subset of the fill containing finer milling material forms a packed particle fill in the milling gap. In addition, the setting is carried out in such a way that individual particles of a second subset of the fill containing coarser milling material are in contact with the first roller and the second roller of the roller press. Subsequently, the bulk material is milled into milled product in the roller press (9) and the milled product is discharged through a discharge opening.

Abstract: A process for making spare parts for refiners used for producing paper, in particular for making refiners for preparing paper pulps, where the pulp enters at one end and exits on the other side, passing through a rotary body or rotor or male component equipped with bars (or grooves) and a casing or stator or female component bearing fixed counter-bars. This process includes mechanical machining of unmachined sectors; routing or mechanical machining of the machined sectors to obtain a set of bars or grooves or holes; putting together the cone (rotor or stator by joining all of the sectors to the supporting flanges; mechanical machining (turning and grinding) to finish the cone; and balancing of the rotor or stator.

Abstract: A grinding roller comprising hard bodies embedded in the surface for fixing a material bed. The hard bodies are received in a sleeve respectively and are embedded in the surface. As a result, the sleeves can be removed more easily from the surface after use and wear of the grinding roller for restoring the surface.

Abstract: Described is a roller for crushing of particulate material, such as crude ore for use in the mineral industry, where the roller body is provided with a roller shell having a plurality of individual wear segments. The roller shell is characterized in that adjacent wear segments have complementary sides and in that a number of the wear segments, prior to mounting of the remaining wear segments, are initially fixed to the roller body in order to provide guiding and fixation for the remaining wear segments which are wedged-in between the number of initially fixed wear segments.

Abstract: A cutting tool for a bolt-in toolholder assembly in a shredding device including a rotor and a bolt-in toolholder, comprises an upper surface and a lower surface, a first side and a second side extending between ends of the upper and lower surfaces, the upper, lower and first and second side surfaces defining a polygon shaped cutting tool, the cutting tool having a forward side and a rearward side, a cutting surface having by an upper portion and opposed side portions, the cutting surface disposed on at least one of the forward side and the rearward side, the cutting surface being offset from a well, the well having a flat inner surface for seating the cutting tool in a first dimension, the well being polygonal in shape, the well size determining a width of the cutting surface, a bolt-in aperture disposed in the well.

Abstract: A carbide cutting tip including a rear surface and a bottom surface for mounting the tip to a cutting tool tooth, a top surface having a pair of peaks separated by a trough, the top surface including a frontward facet and a rearward facet sloped downwardly and rearwardly at a non-zero angle ? with respect to the frontward facet, and a front surface having a substantially flat lower portion and a concave upper portion having a shape defined by a segment of an ellipse, the lower portion being disposed substantially perpendicularly to the frontward facet of the top surface, the lower portion and the upper portion joining at a break point located at the apex of the major axis of the ellipse, the major axis of the ellipse being canted frontwardly from the break point at a non-zero angle ? with respect to the lower portion of the front surface.

Abstract: A wear assembly for use on a driven roll for earth-working machines and the like operations that eases replacement of the wear parts, lengthens the life of the bases, reduces the amount of throw-away material to be discarded, and has a lower manufacturing cost. The wear part overlies and protects the base to prolong the useable life of the base, lessen machine downtime, and reduce throw-away material. The use of an overlying adapter eases and speeds replacement of the wear parts to further limit downtime of the machine. The wear part is preferably a two-piece component with no machined parts for a lower manufacturing cost and easy replacement.

Abstract: The invention relates to an apparatus and method for conditioning materials for processing wherein such conditioned materials are used in a recycling process. The invention includes a conditioning section comprising a drum associated with a tooth kit. The tooth kit is easily removable from said drum and replaced. The invention also covers the tooth kit.

Abstract: The various embodiments disclosed and pictured illustrate a curved hammer for comminuting various materials. The illustrative embodiments pictured and described herein are primarily for use with a rotatable hammermill assembly. The curved hammer includes a connection portion having a rod hole therein, a contact portion for delivery of energy to the material to be comminuted, and a curved neck portion affixing the connection portion to the contact portion. In other embodiments, a shoulder is positioned around the periphery of the rod hole for added strength. In still other embodiments, a neck reinforcement is positioned along a portion of the neck for increased strength. A weld or plurality of welds may be affixed to various surfaces of the contact portion to aide in comminuting and/or longevity of the curved hammer.

Abstract: A hammer mill has a lockable milling chamber and a rotor disposed in the milling chamber. The rotor has a shaft supporting plural rotor discs and plural hammer pins for receiving hammers or hammer assemblies. The hammer pins do not extend over all the segments defined by the discs.

Abstract: A cutting tooth having a blade-like cutting section and a mounting section extending down from the bottom of the cutting section. The mounting section is narrower and shorter than the cutting section, and generally centered with respect to the cutting section. The mounting section has laterally extending flanges spaced from the cutting section. At least a quarter of the cutting section extends past the front of the mounting section and terminating in a cutting edge. The cutting tooth is adapted to be mounted in a mounting block to form a cutting assembly. The mounting block has a slot extending into the block from the front face, the slot open in the top surface of the block. The mounting section of the tooth slides into the slot in the block to locate the cutting section on the top of the block with the cutting section projecting forwardly of the block. The flanges on the tooth hold the tooth in place in the block against centrifugal forces.

Abstract: A rotary knife for a granulator having a two-piece design comprising a blade holder and a removable blade, the blade holder having a V-shaped saddle for holding the removable blade aligned. The V-shaped saddle having a flat surface for absorbing the shock of force transmitted by the blade shearing plastic and other materials for recycling and reuse.

Abstract: An apparatus for fracturing polycrystalline silicon having a pair of rolls which are rotated in a counter direction each other around parallel axes; and a plurality of fracturing teeth which are provided on outer peripheral surfaces of the rolls and are protruded radially-outwardly, in which top surfaces thereof are formed spherically and side surfaces thereof are formed conically or cylindrically, and fracturing fragments of polycrystalline silicon between the rolls.

Abstract: A clamping assembly to hold a woodworking knife in place in a woodworking machine. The clamping assembly comprises a clamping component comprising a body and an actuator. The body has three discrete contact positions distributed thereon: 1) a fulcrum located generally at one end, 2) a knife abutting portion located generally at the other end, and 3) a bearing surface located elsewhere. The actuator is for applying a clamping force to the body along a clamping axis located intermediate of the knife abutting portion and the fulcrum. The fulcrum is a surface having a normal that is at an angle to the clamping axis. The bearing surface is a surface wherein a line normal to the bearing surface intersects the line normal to the fulcrum at a position outside of the clamping component at a location farther askew of the clamping axis than the fulcrum.

Abstract: A roll for use in processing crop materials in a crop processor apparatus is disclosed. The roll has a generally cylindrical cross-section and a plurality of alternating longitudinal ridges and longitudinal grooves on a surface of the roll. The longitudinal ridges having outer edges interrupted by gaps between the ends of the roll, forming tooth segments between the ends of the roll.

Abstract: A tool unit for a comminution device with a rotor-stator system is provided, in which comminution tools are detachably fastened to tool holders on a rotor circumference and work together with comminution tools located on the stator. In order to shorten the tool replacement downtimes of a device equipped with such a tool unit and to increase its profitability, the tool holder includes a first carrier section and a second carrier section, the rear sides of which sections detachably contact one another in a common contact plane, and on each of the mutually averted front sides of which is located at least one bearing surface for accommodating a tool.

Abstract: An apparatus for fracturing polycrystalline silicon has: a pair of rolls which are rotated in a counter direction each other around parallel axes; and a plurality of fracturing teeth protruding outward radially from outer peripheral surfaces of the rolls and having variant heights. In the apparatus for fracturing, the fracturing teeth are arranged so that higher teeth among the fracturing teeth and lower teeth among the fracturing teeth are alternately rowed at least along a circumferential direction or a width direction of the rolls; and the fracturing teeth are arranged so that a tip of the higher tooth of the one roll and a tip of the lower tooth of the other roll are opposed to each other at a position in which the fracturing teeth of each rolls are closest to each other, so that the apparatus fractures fragments of polycrystalline silicon between the rolls.

Abstract: An apparatus for fracturing polycrystalline silicon having: a pair of rolls rotated in a counter direction each other around parallel axes; and a plurality of fracturing teeth units provided on outer peripheral surfaces of the rolls, arranged along a circumferential direction of the rolls, and have a plurality of fracturing teeth and fixing covers fixing the fracturing teeth on the outer peripheral surfaces of the rolls, in which: the fracturing teeth has flanges; and the fixing covers are formed as strips along a longitudinal direction of the rolls, and in which the fixing covers are fixed on the rolls in a state in which top ends of the fracturing teeth are protruded outward radially of the rolls from the fixing hole outward so as to hold the flanges between the fixing covers and the rolls.

Abstract: A roller shell for a conditioning roller has grooves extending in the axial direction and grooves extending in the circumferential direction. The grooves extending in the axial direction are deeper than the grooves extending in the circumferential direction.

Abstract: The invention relates to a blade bit to be attached to a chuck in an envelope surface of a crusher rotor, the blade bit (1) having four corners and arranged for being attached to the chuck such that an angular-shaped tip of the blade bit points outwardly from the envelope surface, substantially in the radial direction of the rotor, whereby the rear surface of the blade bit, which acts as its attachment surface to the chuck, comprises a support surface (9) preventing the blade bit from rotating, which support surface also enables sliding of the blade bit towards the envelope surface (3), when the blade bit is being attached, until the blade bit is supported to the envelope surface.

Abstract: A refining plate segment for a mechanical refiner of lignocellulosic material including: a convex conical refining surface on a convex conical substrate of the plate, wherein the refining surface is adapted to face a concave conical refining surface of an opposing refiner plate, the convex conical refining surface including bars and grooves formed between adjacent bars, wherein an angle of each bar with respect to a reference line parallel to a rotational axis of the refiner increases at least 15 degrees and the angle is a holdback angle is 10 to 45 degrees at a periphery of the refining surface, and wherein the bars each include a leading sidewall having an irregular surface having protrusions extending outwardly from the sidewall toward a sidewall on an adjacent bar.

Abstract: The invention relates to a comb tooth holder, especially for comminution devices having cutting teeth disposed on comminution rolls, said cutting teeth interacting with comb teeth arranged on at least one mating holder or cage for comminuting the material to be comminuted. Said comb tooth holder consists of at least one comb tooth body and at least one comb tooth. The comb tooth can be fastened to the comb tooth body by means of a first positively locking portion, at least one additional positively locking portion being provided on the comb tooth holder for fastening the comb tooth to the comb tooth body. The invention is characterized in that a web surface connecting the two positively locking faces extends in the center of or centrally in the recess.

Abstract: Provided is a roller cutter for a shredder having sufficient strength obtained by using a reduced amount of a metallic material. A roller cutter for a shredder is provided with a rotary shaft rotationally driven by a drive mechanism, finely cutting blades each including disks joined together on inside surfaces thereof, the finely cutting blades being successively mounted on and supported by the rotary shaft with the angular phase of each of the blades displaced by a predetermined angle from each other, and shaft fixation members which are fixed to the rotary shaft to thereby fix the finely cutting blades to the rotary shaft under conditions where the members have been mounted at both ends of the finely cutting blades. In this roller cutter, the finely cutting blades have folded parts forming thick-walled portions which go into contact with each other, the folded parts being formed by folding inward the sheet metal material used for forming the disks.

Abstract: A cutting element for comminuting organic substances, organic materials, soils, plant cultures or the like, in particular for mulching, shredding and chopping, which cutting element can be connected fixedly or releasably to a comminuting rotor.

Abstract: A clamping assembly to hold a woodworking knife in place in a woodworking machine. The clamping assembly comprises a clamping component comprising a body and an actuator. The body has three discrete contact positions distributed thereon: 1) a fulcrum located generally at one end, 2) a knife abutting portion located generally at the other end, and 3) a bearing surface located elsewhere. The actuator is for applying a clamping force to the body along a clamping axis located intermediate of the knife abutting portion and the fulcrum. The fulcrum is a surface having a normal that is at an angle to the clamping axis. The bearing surface is a surface wherein a line normal to the bearing surface intersects the line normal to the fulcrum at a position outside of the clamping component at a location farther askew of the clamping axis than the fulcrum.

Abstract: A segmented knife assembly for a mixer apparatus is disclosed. The knife assembly has a front, a rear, and a perimeter with a cutting edge forming a portion of the perimeter. The segmented knife assembly includes a support portion positioned toward the rear of the knife assembly for positioning on the auger of the mixer apparatus when the knife assembly is mounted on the mixer apparatus, and a positioning portion on the support portion and defining at least one positioning pocket, with the pocket being oriented toward the cutting edge of the knife assembly. The assembly also include a cutting portion removably positioned in the pocket of the positioning portion. The cutting portion includes a cutting edge section that forms at least a portion of the cutting edge of the knife assembly.

Abstract: A chipper knife adapted to be mounted in chippers which have a rotatable tool, in the form of a disc, drum or frustoconical member, on which a plurality of chipper knives are mounted has at least one cutting edge which is defined between two edge-forming surface portions of the knife at an acute angle to each other. At least one of the two edge-forming surface portions extends from the cutting edge inwardly to a shoulder extending parallel to and facing away from the cutting edge and defining a step surface on the knife behind the shoulder with respect to the rest of the adjacent knife surface and chipper knife.

Abstract: A cutting tooth is used on a brush cutter head. The cutting tooth includes a cutting portion having a first face and a second face. The first face and the second face cooperate to define a tapering profile terminating in a cutting edge. The first face of the cutting portion carries a plurality of ridges formed thereon to direct cutting debris away from the cutting edge and facilitate passage of the debris along the trailing face when the cutting tooth is in use.

Abstract: A chipper knife that is adapted to be mounted in chippers which have a rotatable tool, in the form of a disc, drum or frustoconical member, on which a plurality of such chipper knives are mounted has at least a first side having a raw, unworked surface or working stripes extending in the longitudinal direction of the chipper knife, substantially parallel to the cutting edge which also has a cutting edge portion extending inwardly from the cutting edge and terminating in a shoulder extending parallel to the cutting edge to provide a clearance step on the knife behind the shoulder with respect to the adjacent knife surface, which edge portion also has working stripes formed therein transverse that cutting edge portion and at an angle to the cutting edge.

Abstract: A chopping drum for a forage harvester has a shaft. Supporting rings are mounted on the shaft one next to the other in the axial direction and extending in the radial direction. Blade holders are distributed around the outer periphery of the supporting rings, and chopping blades are mounted on the blade holders by first screws. The first screws produce a connection between blade holders one following the other in the peripheral direction.

Abstract: A device for shredding poultry carcasses, includes a frame supporting a comminuting unit and a drive unit. The comminuting unit includes a drum mounted on a rotatable shaft, the drum having a generally cylindrical surface and an array of cutting points affixed to the drum, protruding from the surface, and a stationary comb having an array of teeth separated by spaces, and extending close to the drum surface so that the points pass between the teeth as the drum rotates. The drive unit turns the drum to reduce the carcasses to a compostable mass.

Abstract: A cutter assembly for a rotary, shear-type shredder including a cutting-tool carrier having a body possessing a rotational axis, a shear cutting tool, and a generally radial, sliding-friction-type, heat-cycle, binding interface removably anchoring the tool to the carrier body. This assembly is made by (a) forming a projection on one of the tool and the carrier, (b) forming a generally complementary, projection-receiving void space in the other of the tool and the carrier, whereby the projection and the void space nominally have an interference-fit relationship relative to one another, (c) creating a temperature differential between the tool and the carrier to an extent producing a clearance-fit relationship therebetween, (d) following that creating, fitting the projection snugly inside the void space, (e) reducing the created temperature differential toward zero, and (f) thereby establishing a robust, linear-sliding-friction anchoring interface between the tool and the carrier.

Abstract: The present invention provides a pressure roller for use in semi-autogenous comminution of maters. The roller has an outer face (11) accommodating a set of wear resistance inserts (13) in a spaced array over the outer face. The inserts are embedded in the surface of the roller and extend into an outer section of the roller. Each insert is spaced inwardly from or is flush with the outer face of the roller.

Abstract: A fragmenting rotor assembly for comminuting waste wood and other fragmentable material. A hammer support is carried by a drive shaft driven in rotation about a longitudinal drive shaft axis. The hammer support projects radially relative to the drive shaft axis and includes a radially outer hammer head. A fragmenting knife is removably secured to the hammer head and has a reducing edge disposed in a radially outer cutting position. A deflecting member is carried by the drive shaft and has a radially outer end that deflects fragments away from at least a portion of the fragmenting knife. The hammer support and/or the deflecting member are carried by at least one rod of a plurality of circumferentially-spaced axially-extending rods that are carried on the drive shaft by axially-spaced rotor members.

Abstract: A cutting tooth having a blade-like cutting section and a mounting section extending down from the bottom of the cutting section. The mounting section is narrower and shorter than the cutting section, and generally centered with respect to the cutting section. The mounting section has laterally extending flanges spaced from the cutting section. At least a quarter of the cutting section extends past the front of the mounting section and terminating in a cutting edge. The cutting tooth is adapted to be mounted in a mounting block to form a cutting assembly. The mounting block has a slot extending into the block from the front face, the slot open in the top surface of the block. The mounting section of the tooth slides into the slot in the block to locate the cutting section on the top of the block with the cutting section projecting forwardly of the block. The flanges on the tooth hold the tooth in place in the block against centrifugal forces.

Abstract: A roller press (1) is described for grinding particulate material such as cement raw materials, cement clinker and similar materials, the roller press having two oppositely rotating rollers (2, 3) with one roller being movably supported relative to the other roller and with the rollers (2, 3) forming between them a roller gap (4). A co-rotating annular disc is attached to one of the rollers (2), which subject to actuation by a number of springs (7), is movable in the direction of the roller axis and which, in the area around the roller gap (4,) extends over the end surface (3a) of the other roller. The annular disc is divided into a number of ring sectors (5) over its circumference, each individually biased by springs towards the end surface (3a) of the other roller (3). Hence, it is possible to maintain the grinding bed thickness at the ends of the rollers, thereby attaining a uniform pressure distribution across the rollers, as well as uniform grinding efficiency and uniform wear on the rollers.

Abstract: Advantageously, certain embodiments of the present invention provide a system that allows easy replacement of one or more worn rotor teeth and/or rotor tooth mount(s) mounted on a waste fragmenting machine. The present invention may further provide a system that allows minimization of stress during fragmentation on the attachment mechanisms between the mount and the rotor.

Abstract: A cutter device for a crushing machine includes a rotary cutter base body and plural cutters. The rotary cutter base body is formed integral and has an outer peripheral side axially and equidistantly formed with plural annular ribs respectively provided with plural flat cut surfaces. Each flat cut surface is formed integral with a protruding fixing base with a fixing hole for locking each cutter on the fixing base. Each cutter body is formed with a cutting side disposed with at least four arcuate cutting edges extending toward the center to form a bulging portion, with the cross section of the cutter side formed with a double-curved surface for thickening the cutter to prolong its service life. The fixing bases are formed integrally with the rotary cutter base body to increase their strength.

Abstract: The present invention relates generally to brush cutting heads, and more specifically, to protective guard members for cutting tooth assemblies mounted on brush cutting heads. A brush cutting head includes a support body having a first end, an opposed second end and an intermediate portion extending therebetween. The intermediate portion has an outer surface. A plurality of collars is mounted to the support body at spaced intervals along the intermediate portion with each collar extending outwardly from the outer surface. The brush cutting head further also has a plurality of cutting teeth assemblies carried on the outer surface of the support body. Each cutting tooth assembly is associated with at least one collar. Also provided is at least one guard member for protecting at least one cutting tooth of the plurality from impacts with hard objects. The at least one guard member is carried on one of the collars with at least a portion thereof projecting beyond the outermost edge of the one collar.

Abstract: A device for comminuting feedstock is provided that includes a cutting tool with a first rotor and at least one second rotor, each of which rotate around their longitudinal axis with an opposite rotation direction. Each rotor is provided with a number of cutting discs, which are arranged at an axial distance to one another. In this case, the cutting discs of the first rotor are located on gaps and with radial overlapping relative to the cutting discs of the second rotor. The cutting discs along their circumference have support surfaces for accepting cutting tools, whose cutting edges move past one another over the course of the rotation of rotors with the formation of a cutting clearance. For the positionally precise fixation of the cutting tool on the cutting discs, a positive fit is formed between the cutting tools and cutting discs, a positive fit groove running in the plane of the cutting disc is arranged in the common contact area, the groove in which at least one positive fit strip engages.

Abstract: A rotary chopper element for an integral chopper assembly of a combine harvester, which rotary chopper element includes a cylindrical rotary member having a plurality of ring portions axially aligned in an ordered side-by-side arrangement along the longitudinal axis of the rotary member, with each ring portion having disposed annularly therearound a plurality of mounting lugs, each of which mounting lugs is designed to support or to have affixed thereto at least one knife blade. The mounting lugs on each succeeding ring portion are rotated or offset radially from the lugs of the preceding ring by a predefined amount and the knife blades are attached to the mounting lugs to form mounted assemblies that have beveled leading edges that extend substantially continuously from adjacent to the outer surface of the rotary member to the tips of the knife blades. The knife blades of such mounted assemblies define a plurality of spaced helical arrays that extend along and wrap around the rotary member.

Abstract: The invention refers to a cutting tool for comminution devices, comprising a knife (2) or knife edge which can be fastened to a comminution cylinder or a toothed body (1). The invention is characterized in that the knife (2) can be arranged non-positive and positive interlocking at the comminution cylinder or the toothed body (1).

Abstract: A brush cutting head having internally housed drive and bearing assemblies which can be easily attached/detached from the brush cutter housing without having to dismantle the drive assembly for improved productivity. The brush cutting head includes a hollow support body, a drive and bearing assembly housed at least partially within the hollow of the support body, a drive block mounted to extend within the hollow of the support body, and a motor provided with a torque transmitting driveshaft.

Abstract: A hammer assembly for attachment to a rotor of a rotary material crusher. The hammer assembly has an adaptor, having a base portion and a hammer mounting portion, with the base portion being attachable to the rotor at the periphery portion and a hammer, having at least one impact portion, for crushing material, and a mounting portion for engagement with the hammer mounting portion of the adaptor. The hammer mounting portion of the adaptor includes bearing surfaces facing a direction of impact when crushing material, and the mounting portion of the hammer includes bearing surfaces for mating with the bearing surfaces of the hammer mounting portion of the adaptor. The hammer assembly further includes a retainer rod, and at least one retainer pin. The hammer is attached to the adaptor and the retainer rod passes through apertures of the adaptor and apertures of each retainer pin in the direction of the longitudinal axes of the hammer and the adaptor.

Abstract: The present invention relates generally to brush cutting heads, and more specifically, to protective guard members for cutting tooth assemblies mounted on brush cutting heads. A brush cutting head includes a support body having a first end, an opposed second end and an intermediate portion extending therebetween. The intermediate portion has an outer surface. A plurality of collars is mounted to the support body at spaced intervals along the intermediate portion with each collar extending outwardly from the outer surface. The brush cutting head further also has a plurality of cutting teeth assemblies carried on the outer surface of the support body. Each cutting tooth assembly is associated with at least one collar. Also provided is at least one guard member for protecting at least one cutting tooth of the plurality from impacts with hard objects. The at least one guard member is carried on one of the collars with at least a portion thereof projecting beyond the outermost edge of the one collar.

Abstract: A bolt-in toolholder assembly for a shredding device includes a rotor having a substantially cylindrical shape, a plurality of pockets formed in the rotor and spaced apart preselected distances to form preselected patterns, a bolt-in toolholder.

Abstract: A beater for comminution devices with a rotor on or at which the beater can be fastened, including a lower body which is designed as a shaft end for connecting the beater with the rotor, and at least one cutting body. At least one cutting body is connected with the lower body in a releasable/fixed manner.

Abstract: Polysilicon is crushed with a minimum of manual and machine crushing steps by utilizing a large diameter roll crusher, the circumferential crushing surface of which is formed of a plurality of reversibly mounted, close fitting hard metal plates. Reproducible crushing along with such low metal contamination that subsequent cleaning of the crushed polysilicon is not necessary are both obtained.