A nut lifting tool of an inner wear part of a cone crusher. The lifting tool has a frame to be placed around a nut to be lifted. The frame has nut lifting lugs for supporting occurring from at least three sides of the center of gravity of the nut and frame suspension brackets for suspending the frame from the nut before lifting the nut. The frame also has an open side for receiving a nut, lateral limiters, which, together with the lifting lugs and the suspension brackets, form a nut receiving space such that the frame can be slid from the open side to surround the nut, and lifting connection pieces for connecting a crane to the frame.

Disclosed is a meat grinder. According to the technical solution of this disclosure, food is placed into a processing cavity through a material inlet, and after the food is fallen to a side of a propeller away from a cutter head, the propeller is configure to propel the food to a cutter. The food is pressed against the cutter head and the food on the cutter head is cut by the cutter, and the food in discharge holes is squeeze outed by the propeller. Because the propeller is rotatably connected to the cutter head through the wear part, it may prevent an end of the propeller facing the cutter head from rubbing directly against the cutter head and causing black powder, so as to avoid the risk of contamination of the meat and affect the user's experience.

The invention relates to an overload protection device for the hydraulic system of a mineral material machining plant, in particular for a rotary impact crusher, a jaw crusher or the like, wherein a hydraulic element equipped to store and/or convey a hydraulic fluid is provided, wherein the hydraulic element comprises a connection area (95) having a passage opening for hydraulic fluid of the hydraulic system, wherein the passage opening is covered by a replaceable burst panel (100), wherein a burst panel holder (96) is disposed on the rear face (101) of the burst panel (100) facing away from the connection area (95), and wherein at least one fastening bolt (97) is passed through a bolt mount (96.4) of the burst panel holder (96) and through a drilled hole (103) of the burst panel (100) disposed in alignment therewith and is bolted into a threaded mount of the connection area (95) in such a way that in the assembled state the burst panel (100) is held clamped between a pressure surface (96.2) of the burst panel holder (96) and a connection surface (95.1) of the connection area (95). To make provision for an easy maintenance after an overload event for such an overload protection device, provision is made in accordance with the invention that at least one retaining element (98) is provided, which, in a dismantling position, holds the burst panel holder (96) to the hydraulic element, in particular at the connection area (95), when the at least one fastening bolt (97) is unbolted from the threaded mount of the connection area (95) and the burst panel (100) is removed.

A hierarchical composite wear component may have a reinforcement in the most exposed part to wear, the reinforcement including a three-dimensionally interconnected network of periodically alternating millimetric ceramic-metal composite granules with millimetric interstices. The ceramic-metal composite granules have at least 52 vol %, preferably at least 61 vol %, more preferably at least 70 vol % of micrometric particles of titanium carbide embedded in a first metal matrix. The ceramic-metal composite granules have a density of at least 4.8 g/cm.sup.3. The three-dimensionally interconnected network of ceramic-metal composite granules with its millimetric interstices is embedded in the second metal matrix. The reinforcement has on average at least 23 vol %, more preferably at least 28 vol %, most preferably at least 30 vol % of titanium carbide, the first metal matrix being different from the second metal matrix, the second metal matrix including a ferrous cast alloy.

A liner bolt (10) comprising an elongate stud (12) and a head (14) engageable with a first end (16) of the stud (12). The head (14) including an inwardly tapered first end portion (24) adjacent a first end (21) thereof. A threaded portion (18) is provided adjacent a second end (17) of the stud for receiving a nut (20). The first end (21) of the head (14) includes an inwardly tapered opening (28) having an internal thread (30) and the first end (16) of the stud (12) includes an inwardly tapered end portion (32) having an external thread (34) such that the first end (16) of the stud (12) is engageable in the opening (28) in the head (14).

The various embodiments disclosed and pictured illustrate a hammer for comminuting various materials. The embodiments pictured and described herein are primarily for use with a rotatable hammermill assembly. The double end hammer includes a connection portion having a slot therein and two contact ends for delivery of energy to the material to be comminuted. The contact ends may be formed with a cavity therein. The contact ends may also be formed with an angle on the contact end periphery. The cavity and/or the angle on the contact end periphery may be used with hammers other than the double end hammers.

A liner element for lining a vertical grinding mill agitator including one or more primary mounting portions configured to releasably mount the liner to a shaft of the agitator; and one or more secondary mounting portions configured to releasably mount one or more wear members to the liner. A liner segment including the liner element and at least one wear member is also disclosed.

A cone crusher bottom shell assembly has a bottom shell wall. An arm liner of the bottom shell assembly includes a central hub positioned radially within the bottom shell wall, a central cavity supporting a central crusher shaft, a material discharge chamber between the bottom shell wall and central hub through which crushed material falls, and a plurality of support arms extending radially between the bottom shell wall and the central hub. The arm liner has a radially outer flange section configured in use to extend over part of an inner surface of the bottom shell wall, a radially inner section configured in use to abut an outer surface of the central hub, and a saddle section configured in use to cover a support arm and having an upper surface capable of contacting material falling through the discharge chamber, wherein the upper surface has a radially extending wear bar.

The present invention relates to a method for improving the productivity of grinding plants, wherein, after the optimum wear geometry of the grinding units has been reached by conventional operation of the grinding plant, the optimum wear geometry is preserved by applying a thin wear protection layer to the surface of the grinding units.

A hammer tip for releasable integration with a hammer, used in a size reducing machine. The hammer tip is separated into a production block with a top working edge and a spacer block. The production block and spacer block utilize a saddle back attachment to the hammer. The production block is further supported with a lock ledge integration to the spacer block. The spacer block further includes a pair of wings extending outwardly from the left and right sides, and forwardly from the front side, of the spacer block to form additional cutting edges. The wings provide for additional sizing of the material being ground and help move (or push or carry) more material through the grates of the size reducing machine in the same amount of time as compared to spacer blocks without wings. This increased throughput improves efficiency of the size reducing machine.