Tri-Nut has its origin in the exchange of ideas between your on-site experts and our service staff in the field. In contrast to the traditional solution using double nuts, fastening jaw dies, using the Tri-Nut system can be done by hand and with light-weight tools. Only three small screws must be tightened, which can easily be loosened again later. Using the Tri-Nut system, you can easily gain a couple of hours during jaw dies changeouts. The noticeably reduced maintenance breaks lower downtime and operating costs and ensure you run a safer workplace.
This fastening system can be used to replace the normal hexagon nuts on all models of the Nordberg C-Series jaw crusher and can also be used on other jaw crushers, considering the available thread sizes (M30, M36 and M48).
A set consists of a special nut and three hexagon screws and replaces the normal hexagon nuts on each hammer head screw and spring unit. One Tri-Nut replaces two normal hexagon nuts. The number of hammer screw spring assemblies varies depending on machine / jaws. So if there are 16 spring assemblies in a C110 jaw mounting, there are normally 32 hex nuts. If you replace those with the Tri nut solution, you will need only 16 tri nuts. Since 2019, almost all Metso jaw crushers have been delivered with the Tri-Nut fastening system. Customer Service is a mutual exchange, not just eliminating a specific customer problem, but also working together on the sustainable optimization of a situation in need of improvement.
Just like other stone crusher machines, jaw crusher also needs a regular repair and maintenance after a certain time of working, or it will get decreased service life because of severe wear of important parts.
So many customers have common misconception that jaw plates only need repair when appearing flat, holes, cracks. Actually if jaw plates wears badly, it is not only hard to repair but seriously affects the normal working of other parts, which then will take a great sum of money to change a jaw plate and maintain other parts.
The pitman drives the moveable jaw dies to push stone material towards stationary jaws, which would create strong pressing forces to both jaw dies. Therefore, if the pitman cannot get lubrication in time, it will be broken under the high pressure of material and interrupt the whole work.
Proper plan and preparation make the whole repair and maintenance ordered and effective, which helps operators save time, cost, and enhance their safety. You can make a checklist just like the following chart in which you can list need-checked jaw crusher parts with a different period then making a mark if you are done with them. This not only prevents missed inspections, but also makes the arrangement clear, and saves a lot of time.
The lubrication of the interface between the parts of the jaw crusher is very important. It can minimize the friction generated during the operation, make the whole jaw crusher run smoothly, and extend its service life.
Unlike gyratory crushers, the main lubrication used in jaw crushers is grease instead of oil. When using grease, there may be several different ways to inject it into the necessary lubrication points. It can be operated manually with a grease gun, an oiler or metering pump.
Eccentric shaft (pitman bearing): It is behind the moveable jaw plate, and together with flywheel with toggle plate to create a motion. So, the most important thing you must do is keeping a regular lubrication to eccentric shaft, or you will spend more than four hours in changing a new one when it is broken.
Main shaft To keep the main shaft in good lubricating situation, you need to guarantee enough geese between thrust plate.The grease added to the bearing box needs to occupy about 50% of its space and be replaced every 3-6 months. When changing the engine oil, please use clean gasoline or kerosene to clean the roller bearing raceways.
There are different jaw plates material in the market, and some of them suits for hard stone while other is not. Therefore, you have to choose the right jaw plate for your crusher. For example, generally the jaw plate of single toggle jaw crusher is not good at crushing strongly abrasive and hard stone material with large production.
The function of toggle plate is to adjust the outlet of the jaw crusher to the desired size. There are two specific methods: one is to replace the support pad between the toggle plate and the body frame, and the other is to adjust the two wedges between the toggle and the body frame.
Fote Company has more than 40-year manufacturing experience, mainly engineering different types of jaw crushers including PE jaw crusher, Dodge jaw crusher, Blake type jaw crusher(double toggle jaw crushers), single toggle jaw cruhser, etc., and all of them can be customized.
As a leading mining machinery manufacturer and exporter in China, we are always here to provide you with high quality products and better services. Welcome to contact us through one of the following ways or visit our company and factories.
Based on the high quality and complete after-sales service, our products have been exported to more than 120 countries and regions. Fote Machinery has been the choice of more than 200,000 customers.
Comminutionis the process by which minedoreis reduced in size to make for easier processing. The strict definition is the action of taking a material, specifically mineral ore, and reducing it to minute fragments or particles. This is typically achieved in several stages of a detailed and professionalminingoperation.
Some of the earliest versions ofcrusherswere large stones used by humans to repeatedly hammer rocks placed upon an anvil (a hard stationary surface); the products made from this hammering action were transported by pack animals or humans in sacks. Historically, mining tasks were incredibly labour intensive, and the produced mined products were correspondingly expensive. The only tools available to breakdown ore were adrill bit,sledgehammer, or apickaxe(and the will power of a few tireless workers). The majority of ore sizing and crushing operations were completed by hand until halfway through the 19thcentury. At this time,water powered trip hammersstarted assisting miners; it was roughly the beginning of theindustrial revolution.
During the industrial revolution, commercial mining started seeing the use ofexplosivessuch asgunpowderat the heart of many mining operations; this mining method is known as blasting and it led to ever larger quantities ofrockandmineralsbeing liberated.Steam shovelswere the next tool to revolutionise the mining industry. Over time,larger machinesand moreadvanced mining techniquesstarted making it possible to liberate significantly larger pieces of ore.
The demand for mined minerals and other mined by-products has not reduced over the past 150 years. To ensure supply could meet demand, many differentcrushingandconveyingmachines were invented. Without simultaneous advances within the fields of comminution and conveying, it would not have been possible to mine and convey materials safely and efficiently (even modern conveyors cannot convey single blocks of material weighing many tonnes).
Almost all quarry and mining operations today make use of crushers to reduce the size of larger materials; loose (smaller) sized materials do not typically require a crushing stage. When mining harder rock,jaw crushers,cone crushers, and/orgyratory crushersare usually employed.
Acrusheris a machine designed to reduce the size of large rocks tosmaller rocks,gravel,sand,orrock dust; this is essential for efficient transport of the product via conveyors etc. Crushing is the first of many stages that lead to separation of themineral(s)from thewaste(gangue) material. Waste material can be discarded or recycled allowing the mineral rich product to be further processed at the main plant.
Various types ofcrusherandmineral separatormay be employed depending upon thethroughput,hardness, andpropertiesof the mineral being processed. In all cases, the crushing stage is essentially achieved by transferring a mechanically amplified force (viamechanical advantage)to a material, to breakdown the bonds which hold the material together.
Crushingis achieved by passing the feed between two solid surfaces, then by applying sufficient force to bring the surfaces together so that the molecules of the material being crushed areseparatedfrom (fracture), or,change alignmentin relation to (deform), each other.
Crushers are commonly classified by the degree to which they fragment the starting material, withprimaryandsecondarycrushers handlingcoarse materials, andtertiaryandquaternary crushersreducing particles tofinergradations. Each crusher is designed to work with a certain maximum size of raw material, and often delivers its output to ascreening machine(screener) which sorts and directs the product for further processing. In many cases, initial crushing stages are followed by further milling stages (if the materials need to be further reduced); see ourball millarticle for further details.
Typically, the initial crushing stage is completed using eithergyratory crushersorjaw crushers. It is often the case that there will be only one crusher installed, and this will be referred to as the primary crusher.
The Blake crusher was first patented byEli Whitney Blakein1858and it is the most common type of jaw crusher employed today. The Blake type jaw crusher has afixed feedarea and avariable dischargearea. Blake type crushers come invarious sizesand are commonly used forprimaryandsecondarycrushing roles.
Jaw crushers aresizedbased upon the dimensions of the top feed inlet (gape) or the dimensions of the jaws. For example, a 32 x 54 sized jaw crusher will measure 32 inches from the movable to stationary jaw (when measured at the top i.e. the opening), and each jaw will have a 54-inch width. If a jaw crusher is rated by jaw plate size, a suitable rating maybe 600 x 400, which indicates a 600 mm by 400 mm jaw plate dimension. Sizes may be given inimperial(inches etc.) ormetric(millimetre etc.).
Material is fed into the top feed opening (gape) and gradually moves downwards towards the lower discharge outlet. As the materials passes towards the outlet, it is crushed between the stationary and moving jaws. Thev-shaped areabetween the two jaws is referred to as the crushing chamber. Because the space between the two jaws becomes narrower towards the discharge outlet, the material size is progressively reduced.
Thegapbetween the jaws at the discharge outlet dictates the material output size. A typical jaw crusher will have a crushing ratio of between6:1to8:1i.e. the feed material size is reduced by a factor of 6 or 8.
Crusher Wear Parts is an industry leader in supplying the best jaw liner parts for a specific application. We offer OEM as well as specialty configurations. We have decades of experience in supplying wear parts to the aggregate and mining industries. We conduct wear studies to evaluate which jaw liner configuration will perform best for your application. If the best configuration is not currently available, we will design one. Modifications available for jaw crusher dies include:Tooth Pitch/Height This can be modified to reduce chamber opening, increase breaking action, and surface area. Tooth Type Many tooth profiles such as round, high round, flat, or sharp can be selected depending on the application. Curve Curve may be added to allow crushing to start higher in the chamber and also to improve the nip angle lower in the chamber. Filled in Ends Ends can be filled in to combat the high wear area at the bottom of the stationary liner allowing liners to wear at the same rate.