1. Home
  2. Blog
  3. 4 Tips FTM Machinery Advises You To Correctly Use Double-Roller Crushers

By: Vaedy Xiao August 13, 2019 Last Updated :December 12, 2019

4 Tips FTM Machinery Advises You To Correctly Use Double-Roller Crushers

The double roller crushers are suitable for crushing medium and high hardness materials in industrial sectors such as road construction, building materials, and refractory materials. This series of roller crushers are mainly composed of roller, roller support bearing, pressing and adjusting device and driving device. The roller crusher is used for ore processing, chemical, cement, building materials, and other industrial parts to crush and finely break the ore and rock below medium hardness. But how can we correctly use the roller to crush materials?


double-roller crushers are used in road construction, building materials, etc.

The precautions of roller crushers should be known

1.Strengthen the work of iron removal. Dropping the non-crushed material into the rolls can damage the double-roller crushers thus causing the stopping. Therefore, a de-ironing device should be installed in front of the crusher.

2.The viscous material is easy to block the crushing space so that the machine should be stopped when handling the blockage failure, and the antimony ore should not be carried out during operation.
3.When the material to be processed contains more large pieces, it should be careful that large ore is easily squeezed out from the crushing space to prevent injury or damage to the equipment.

4.After the double roller crusher is operated for a long time, due to the large wear of the roller surface, the particle size of the product will be too fine. At this time, it is necessary to pay attention to adjusting the discharge port or repairing the equipment.

5.Timely to lubricate the machine to keep the double roller crusher machine in a good station.

6.Adjusting the discharge granularity: There is a wedge or washer adjustment device between the two rollers. The top of the wedge device is equipped with adjusting bolts. When the adjusting bolt pulls up the wedge, the wedge will lift the movable roller away from the fixed roller. The wheel, that is, the gap between the two rollers becomes larger, and the discharge granularity becomes larger. When the wedge is downward, the two rollers of the movable roller become smaller under the action of the pressing spring so that the discharge granularity becomes smaller. The gasket device adjusts the size of the discharge by increasing or decreasing the number or thickness of the gasket. And when the gasket is added, the gap between the two rollers becomes larger, which makes the discharge granularity larger.

7.Do not change the direction of rotation of the machine.

8.When the machine is running out of power, immediately pull off the power supply.

What are the main factors causing the double-roller crushers to block the material?

After the long-term operation of the roller crusher, various failures will occur but don’t worry about that because they are common problems. It is only necessary to take reasonable countermeasures to solve the problem one by one.


This FTM worker is maintaining and wielding the roller machine.

1.The double-roller crusher was blocked. If the roller crusher is fed too much or is uneven and the material does not meet the standard, it will cause blockage, which will suddenly increase the current of the equipment so that the circuit automatic protection device will stop the protection circuit. This causes the phenomenon of the machine chocking, so it is necessary to strictly follow the operating standards when feeding to avoid the problem of blocking material.

2.The third is the spindle break card machine. The fracture of the main shaft of the roller crusher may be caused by an improper operation or the crushing machine is in an overloaded state for a long time. Therefore, to avoid the shutdown caused by the spindle breakage, the operator must undergo strict induction training. When operating the equipment, it must be operated in strict accordance with the operating standard. Also, avoid overloading the equipment and pay attention to check the operation of the equipment.

3.The blockage caused by a moving roller and an adjusting. When the load of the roller crusher is working, the hydraulic station will make the locking ring fail, and the adjusting sleeve will follow the running roller. Once the processing is not timely, the adjusting sleeve will be stuck and the machine will stop. There is also a problem that the adjustment screw is poorly lubricated, and the load on the roller is caused by adjusting the seal of the cap and the wear of the dust cover. Therefore, this reminds the users to pay attention to check whether the various components of the equipment are normal and timely.

As long as the main factors causing the roller crusher to block the material are found, the problem of the blockage can be solved fundamentally. The same is true for other devices.

How to deal with the malfunctions of the roller crusher reducer?

The accessories of mechanical equipment are a very important part and it can be said that it is directly related to the efficiency of the whole equipment. Therefore, if problems occur, it should be solved in time. The roller crusher has been sold well in the market in recent years and can be used in many industries. The reducer is indispensable for the roller crusher, so what should we do if the reducer malfunctions?


internal parts of double-roller crushers and working principles.

1.When the tooth surface damage area exceeds 20%, the gears should be replaced in pairs. After replacement, the gear should be run and load tested until the tooth length and high up to 60% and 40% respectively.

2.When the roller crusher reducer rotates, the output shaft does not rotate, which may be that the reducer key connection is broken. And it is necessary to disassemble the reducer.

3.When the vent hole of the roller crusher reducer is blocked, and then we should remove and install gas cleaning filter.

4.If we the register of the oil pressure, oil temperature and flow rate of the roller crusher reducer in wrong, we need to clean filter and nozzle.

5.When working on the roller crusher, it should be stopped when the temperature rise of the reducer oil temperature exceeds 80C or the temperature of the oil pool exceeds 100C and abnormal noise is generated. Check the cause and replace the lubricating oil to eliminate the fault.

6.The bearings of the roller crusher reducer should be splash-lubricated. When disassembling and reassembling, it is necessary to add an appropriate amount of calcium-sodium-based grease, which is about 1/3 of the bearing space.

How to prolong the service life of the roller crushers?

After the machine has been used for a long time, there will be some minor problems, such as the loss of machine efficiency and serious wear of the accessories. But if we know how to solve it, then it will be much easier to do. The roller crusher is sold well on the market, thanks to the advantages of the equipment itself, and it not only can crusher a variety of materials but also work very efficiently. While even many outstanding performances of the roller crushers, they still have some challenges. For example, some users have so much worried about the short service life of the machine.
1.The order of opening the whole production line is the discharge system-crusher-feeder because it is necessary to ensure the no-load start-up operation of the sand making machine; the shutdown sequence is a feeder-crusher-discharge system.

2.It is forbidden to enter the sanding machine beyond the specified feeding range of the roller crusher, which will easily cause an imbalance of the impeller and excessive wear of the impeller, and shorten the service life of the crushing machine.

3.The feeding of the roller crusher must be even, stable and qualified.

4.Roller crusher adopts dry oil lubrication. The amount of addition is 1/2-2/3 of the bearing cavity. When the crusher equipment is working every fixed hour, please add an appropriate amount of grease.

5.For the roller crushers, the high-manganese steel structure and adjustable speed impeller device can be doubled in terms of process and crusher performance than the original ordinary crusher.

This a roller machine crushing site in Zimbabwe where they wanna crush granite and output is 200t.

In general, all above skills FTM Machienry teach you is very important, which is not only for roller crushers but also the same to other crushers. Besides, if you have any other questions like how to get the high-quality crushing machines and how to prolong the service life of used roller crushers, you can message us then we’ll try our best to help you.

Latest blog


Chat Now Cancel