Understanding Jaw Plates: The Heart of Your Jaw Crusher

 Jaw plates are critical wear components in jaw crushers, directly responsible for crushing hard rocks, ores, and other abrasive materials. Their design, material, and proper maintenance significantly impact crusher efficiency, product quality, and operational costs.

Material & Composition

Most jaw plates are made from high manganese steel (Mn14%, Mn18%, Mn22%) or alloy steel for enhanced durability. Advanced versions may include chromium carbide overlays or martensitic steel for extreme abrasion resistance. The right material choice depends on the application—softer rocks may require toughness, while granite or basalt demand harder alloys.

Design & Tooth Profile

Jaw plates feature fixed and movable designs with varied tooth profiles:

• Smooth/flat plates: For fine crushing or softer materials.
• Corrugated/toothed plates: Provide better grip and crushing force for hard rocks.
  Proper alignment and correct plate pairing prevent premature wear and uneven particle size distribution.

Maintenance & Replacement Tips

1. Monitor wear patterns – Excessive wear at the bottom indicates improper feed sizing.
2. Rotate plates periodically – Swapping fixed and movable plates extends service life.
3. Use OEM or certified aftermarket parts – Ensures compatibility and optimal performance.

Conclusion

Investing in high-quality jaw plates tailored to your crushing needs reduces downtime and lowers cost per ton. Consult crusher specialists to select the ideal jaw plates for your operation.

Cone Crusher Wear Parts: A Guide to Optimization & Longevity

 Cone crushers are critical in mining and aggregate processing, but their efficiency depends heavily on wear parts. This guide explores common wear components, factors affecting their lifespan, and best practices for maintenance.

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1. Key Wear Parts in Cone Crushers

A. Mantle & Concave

• Function: Primary crushing surfaces that compress and break rock.
• Materials: Typically made from manganese steel (Mn14%, Mn18%, Mn22%) or TIC (Tungsten Carbide) inserts for abrasion resistance.
• Wear Patterns: Uneven wear leads to poor crushing geometry and reduced throughput.

B. Bowl Liner & Adjustment Ring

• Role: Protects the crusher’s interior from abrasive feed material.
• Challenges: High-impact zones require hardened alloys like chromium steel.

C. Eccentric Bushings & Bronze Bearings

• Purpose: Reduce friction between moving parts.
• Failure Signs: Overheating, increased vibration, or metallic contamination in lubrication oil.

2. Maximizing Wear Part Lifespan

A. Proper Installation

• Ensure correct torque on bolts to avoid mantle/concave movement.
• Align liners symmetrically to prevent preferential wear.

B. Regular Inspections

• Measure liner thickness with wear gauges monthly.
• Check for cracks or deformation (magnetic particle testing recommended).

C. Operation Best Practices

• Avoid metal contamination (tramp iron) with metal detectors.
• Maintain consistent feed distribution to prevent "tired" liner sections.

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3. When to Replace Wear Parts?

• Mantle/Concave: Replace when worn to ~60% of original thickness.
• Bushings: Change if clearance exceeds OEM tolerances.
• Economic Trade-off: Frequent replacements increase cost-per-ton; delay risks crusher damage.

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Conclusion

Optimizing cone crusher wear parts extends equipment life and reduces downtime. Key strategies include material selection, operational adjustments, and preventive maintenance. For severe applications, consider composite alloys or ceramic inserts for extra durability.

Will You Choose a Good Used Komatsu Excavator?

Excavators, also named excavating machinery, are such earthmoving machines using scoop to excavate materials higher or lower than machine surface and loading transport vehicles or discharging to the stocking yard. And the materials are mainly loose soil, coal, sediment, and the soil and rocks. Used Komatsu Excavators develop relatively quickly, and it has become one of the main engineering machinery in engineering construction.

 Influx of large numbers of equipment contributes a lot to used excavators' constantly growth. As an emerging industry, excavators have a huge potential to mining in engineering machinery.

 First of all, the most prominent and attracting customers most is the price of the used Komatsu excavators, which may even lower than half of the new ones in all probability. The use of cycle length and the degree of wear and tear will also affect the price indirectly, and the most important is still the choice of customers if the machines reach their demands.

 In addition, It's a shame that the quality of the used Komatsu excavators can't be guaranteed, so that some people may have a doubt that purchasing such second-hand excavators is just like buying goods online and there are certain risks.

 In general, however, the formation of the excavator market scale has become a trend, and it is close to perfect no matter in sales, transportation, use, service and maintenance. As the development of the used excavators, the quality will be continually improved and it will also gain greater market space and become another new product among mainstream machinery products. Therefore, it will be useful to learn some tips about how to choose and purchase such excavators.

Following are some suggestions:

 1. Have a check if the engine is leaking oil, step on the gas to see whether the excavator is working correctly.

 2. Step on the gas to listen whether the sound is normal, stretch out the hydro-cylinder to check the voice of the pump.

 3. Test the link chain and chain board.

 4. Check the steering wheel up and down, a little gap around is allowed.

 5. Look at the quantity of pipelines replaced, the less the newer.

 6. Check the work speed of the accelerator, make an assessment.

 7. Check all the hydro-cylinders, to see if there is a scar.

 8. Check by walking, according to the high speed mode, with your ears close to the drive wheels ，listen if it works normally. Last but not least, sincerely hope that you find satisfied used Komatsu excavators!

http://www.usedexcavatorssale.com/usedexcavators/komatsuexcavators

What Are Tips for Buying Used Excavator?

With engineering machinery's high temperature dropping, many users turned purchase targets from the new machine market to the second-hand machine market. Compared to the new machine, the used excavator machine has the absolute advantages in terms of price, however, there are advantages and also disadvantages. More problems exist to buy a used car than the new car. If you don't have a good understanding of the excavators, being deceived can hardly be avoided. According to the users, it is difficult to identify the third-hands, four-hands and even accidents machines' quality from the appearance after the renovation of a series of processing. First of all, if you want to buy a second-hand excavator,its a must to invite a senior old man to help and have a test. Secondly, when purchasing the machine, don't seeking small advantages.If you feel that the machine prices are much lower than expected, which may be tricky, so be cautious to purchase it ! And here comes some attentions from a reporter. He acquired these from the feedback of the users. You can take it as a reference. Whenever you buy something, the first sight is the appearance, so is the excavator. The experienced users can estimate the usage and attrition rate at the first sight. So, what exactly should we care about the appearance and how to do that? Maybe it has troubled many users, now I will introduce the methods to you. Primarily, the size of excavator arm. Watch carefully whether the big arm and the small arm of excavator have cracks or welding marks or not. If there are cracks, you can assure that the machine has been operated in a poor condition before, and it has bee seriously damaged. Therefore, even if you bought this kind of machine, it's very hard for you to manage. Secondly, check four round areas. Firstly observe the driving wheel, guide wheel, supporting wheel, belt wheel and crawler, and find out whether they have been worn severely. Then check the chain, if it's original, there will be a sign on the chain and this sign corresponds to the information of the machine; if not, that chain has been changed, you must be careful to buy. Besides, the engine is commonly known as the "heart" of excavator, so we must carefully check the engine in the purchase of second-hand machine, commissioning to check whether it has noise, the power is strong or not, etc. Accidentally, hydraulic pump is the power component of hydraulic system, its effect is to transform the original motive of the mechanical energy into fluid pressure energy, it provided power to the entire hydraulic system. Consequently, the hydraulic pump test is also very important. When purchasing, use your hand to touch the hydraulic pump, judging there exists shock hand-feeling or not. And then check the hydraulic pump whether it has cracks, whether there is a serious oil spill and have a test. Ultimately, check the electrical system, whether the circuit can work normally, and then enter the computer system to check the motherboard, if you can have a sight of all kinds of work after entering the system, such as speed, pressure, maintenance mode, etc, which prove that computer board is normal . The above several matters is collected with the warm heart to help you which need high attention. And if you have a better method, just speak out; after all, what we hope is to prevent people being deceived.

Kobelco Used Excavator Serves for Construction Area

Kobelco set up in 1905, and Kobelco Steel construction machinery is a subsidiary corporation of Kobelco from October 1999. It is specialized in manufacturing and sales of excavator and cranes and other construction machinery. In August, 2003, Chengdu god steel engineering machinery corporation was founded in Chengdu, China, including Chengdu steel construction machinery company (mainly hydraulic excavator production) and Sichuan Chengdu engineering machinery plant type company (mainly equipment for wheel loader production). Chengdu god steel construction Machinery Corporation mainly sells Kobelco hydraulic excavator (a brand of wheel loader) and other engineering machinery. Kobelco used excavator is a kind of multi-purpose of construction machinery, mainly serving for mining conditions, loading, land leveling, slope, hoisting such as crushing, demolition and trenching working for construction areas. It is a kind of practical machinery for construction area such as roads, railways, bridge, airport, port construction, as well as for water conservancy construction. Therefore, used Kobelco excavators possesses the function of bulldozers, loaders, cranes and could take the place of these mechanical. Backhoe type used excavator is a common kind that cutting forced soil. It can be used to stop of the operation of mining. Its basic operation modes are gully ending mining, straight line mining, curving mining, super deep trench, slope mining and groove mining. Face-shovel used excavator action form is moving upward and forced cutting soil. For construction area, shovel excavator can dig very deep stop surface above the soil. It is appropriate for drying of foundation pit more than 2 meters, but it must set up and down ramp. In order to meet the demand of various construction areas, hydraulic used excavators can be equipped with a variety of working device, such as mining, lifting , loading, damp, bulldozing, impact hammer and other operation equipments. Hydraulic driving system by the hydraulic pump of the engine power is passed to the hydraulic motor, cylinder actuators. It promotes the working device to complete all assignments. More Used excavator buckets for sale. http://www.usedexcavatorssale.com/usedexcavators

Maybe You can Replace the Used Excavator Bucket Yourself

Used Excavator bucket is one of the most frequent usage parts of the used excavator when it is at work; excavator bucket is also the fastest wear parts. So, it often needs to be replaced especially for used excavators. The replacement of the digging bucket is a technical work. Operators can only finish this work without causing damage to the machine and persons nearby by paying attention to many matters. Excavator bucket is connected with connecting rod by bucket rod pin and link pin. Bucket replacement is actually the process of dismantle bucket rod pin and link pin, remove the original bucket and then connect the new bucket with bucket rod pin and link pin. Specific steps are as follows: 1. Lower the digging bucket to a flat surface. In this process, try to make the bucket just contact with the ground. Under this condition, the resistance of removing the pin shift is smallest. 2. Remove the bucket rod pin and connecting rod pin. Dismantle the lock bolt and double nuts of the bucket rod pin and connecting rod pin and then unload them as well as the bucket. In this process, keep in mind that the bucket rod pin and connecting rod pin cannot be contaminated by mud and sand. The seal at the ends of the shaft sleeve cannot be destroyed. 3. Install new digging bucket and other device. Change the position of the arm, align the holes on the arm and the bucket, then cover them with grease and install the bucket rod pin and connecting rod pin. Pin's installation process is on the opposite of the dismantle process. When we are installing the bucket rod pin, we should first install the O-ring and then put the O-ring in the proper slot after inserting the bucket rod pin. However, when we are installing the connecting rod pin, we should first insert the O-ring in an appropriate slut and then put in the connecting rod pin. 4. Install the pin locking bolts and nuts, and cover them with grease. It seems to be very easy to change the digging bucket, but the whole process can be very dangerous. There are precautions that we must remember. When strike the pin with a hammer, lemel may fly into our eyes and lead to serious harm, so we need to wear goggles, helmet and other protective equipment. Place the bucket steadily while removing it. When we are striking the pin with full force, pin may fly out and hurt the surrounding people. Therefore, ensure the safety of those around before blow pin. Pay special attention not to stand under the bucket while removing the bucket. Do not put your hand into the pinhole when you are aligning the hole. There is another part-the used track excavators, which is also very important for the excavator. It has always been a difficulty for excavator boss and maintenance master, not to mention an ordinary operator. So, if you want to change the track, ask for the help of a professional maintenance master. http://www.usedexcavatorssale.com/usedexcavators

Usages of Used Mini Komatsu Excavator is Wide

What are usages of used Komatsu mini excavator? Used mini excavator is a kind of multi-purpose of construction machinery, mainly serving for mining conditions, loading, land leveling, slope, hoisting such as crushing, demolition and trenching working for construction areas. It is a kind of practical machinery for construction area such as roads, railways, bridge, airport, port construction, as well as for water conservancy construction. Therefore, used mini excavator possesses the function of bulldozers, loaders, cranes and could take the place of these mechanical. Used excavator has a advantage of small size. Therefore, it can be operated very flexibly. It is easy to remove used mini excavator in the underground of mine roadway. It is very suitable for non-ferrous metal mine in the cross of roadway section. Besides, used mini excavator just needs one person to operate, and it equips driving room for operator. Thus, it improves the safety ability in case of stone sinking. It also has the function of eliminating danger. When manual work can't finish the working, mini excavator could help to accomplish the working. The most important point is that it can reduce cost and promote working efficiency. Compared with artificial ore loading, used mini excavator can save the ore loading fee. Used Komatsu mini excavator is a common kind that cutting forced soil. It can be used to stop of the operation of mining. Its basic operation modes are gully ending mining, straight line mining, curving mining, super deep trench, slope mining and groove mining. Used mini excavator action form is moving upward and forced cutting soil. For construction area, used mini excavator can dig very deep stop surface above the soil. It is appropriate for drying of foundation pit more than 2 meters, but it must set up and down ramp. If you need a heavy equipment to complete all kinds of operation such as road construction, general construction, garbage disposal, recycling, landscaping, public facilities, used mini excavator is your ideal choice. Used Komatsu mini excavator is your mining operation' right hand man with the new mining equipment efficiency. Especially the performance of hydraulic used excavator, it can be daily used in quarrying, mining, road construction, civil enginnering and general construction and other assignments. You can purchase the required equipment with wide range of products from your local construction equipment dealer. It can satisfy fully your working requirement to select your bucket or a series of other subsidiary devices. Each used mini excavator upholds the first class design and professional manufacture, strong and durable, strong power and fuel efficiency, etc. More Used Komatsu mini excavator for sale. http://www.usedexcavatorssale.com/usedminidiggers/komatsuminidiggers