Why Crane Wheels Wear Out Quickly and How to Prevent It

In the operation and maintenance system of various types of lifting equipment such as bridge, gate, tower, etc., the wheels are the core vulnerable components that carry the load of the whole machine and ensure smooth walking, and they are also the key accessories that can easily be ignored.There is a common problem in many factories. The service life of crane wheels is much lower than the design standards, and problems such as tread wear, rim gnawing, and surface cracking frequently occur, and the average replacement cycle is greatly shortened.

Rapid wheel wear and tear will not only increase the cost of parts procurement, downtime and maintenance, but also cause safety hazards such as crane walking jitter, deviation, and brake failure. In severe cases, it will lead to track deformation, stress damage to the main beam, and cause major equipment failures and even safety accidents.For heavy industry manufacturing, port warehousing, site construction and other enterprises, crane wheel wear is not a simple problem of parts loss, but directly affects production efficiency, operation and maintenance costs, and equipment safety.If you want to effectively avoid the problem of premature wheel aging, you need to deeply understand the core causes and development laws of wear and tear, and do a good job in targeted prevention, control and operation and maintenance.

Why Crane Wheel Wear Should Not Be Ignored

Many companies have a misunderstanding of the operation and maintenance of crane wheel wear, believing that it is a conventional wearing part, and there is no need to intervene in time for minor wear, and it can be replaced after the wear seriously affects walking.In fact, progressive wheel wear is an important early warning of equipment failure. Letting it go will cause multiple chain losses. The specific hazards are reflected in the following three aspects.

• Operation and maintenance cost loss: Long-term abnormal wear and tear of wheels will continue to increase the operation and maintenance expenses of enterprise equipment.Frequent replacement of wheels and repair of damaged tracks are required in the short term, resulting in a large number of accessories and labor costs.Long-term problems such as track deformation, main beam offset, and transmission system loss will be induced, resulting in irreversible aging of equipment, greatly reducing the overall service life of the crane, and the cumulative loss cost is extremely high.
• Equipment safety hazards: Wheels with excessive wear and tear will completely disrupt the walking balance and stability of the crane.Wear and tear of the rims can easily cause the equipment to run off and derail, and the risk of derailment increases sharply.Uneven wear and tear of the tread surface can cause equipment operation jitter, abnormal noise, and unbalanced force. Under heavy-duty and high-altitude operating conditions, it can easily cause major safety accidents such as equipment overturning and heavy objects falling, which seriously threaten the safety of on-site operations.
• Loss of production efficiency: sudden wheel wear and failure will directly cause the crane to stop for maintenance, disrupt the original production schedule of the enterprise, and cause delays in construction and reduced production capacity.For 24-hour continuous operation scenarios such as ports and steel mills, the indirect economic losses caused by a single sudden shutdown far exceed the replacement cost of the wheels themselves, which directly affects the production efficiency of the enterprise.

l Common Causes of Rapid Crane Wheel Wear

• The rapid wear and tear of crane wheels is not caused by a single factor, but the result of the superposition of multi-dimensional problems such as installation, material, operation and maintenance, working conditions, and load.The premature aging and wear of most wheels is not a product quality problem, but is caused by irregular use and maintenance in the later stage.The following six core incentives cover more than 90% of the rapid wear and failure of wheels.

Misaligned crane wheels

Wheel dislocation is the primary cause of abnormal wear and tear of crane wheels. It mostly occurs after the equipment is newly installed, the wheels are replaced, or the force is deformed for a long time. It is mainly manifested as uneven wheel track, vertical tilt, and the wheels are not parallel to the track.Under normal working conditions, the tread of the lower wheel is evenly subjected to force and the wear is controllable. Once misalignment occurs, the rim will continue to rub hard and squeeze the side of the track, resulting in huge lateral friction, causing edge gnawing and unilateral wear.Slight misalignment accelerates loss, and severe misalignment will cause equipment to run off, walk stuck, and quickly damage the wheels and tracks.

Uneven rail installation

The installation accuracy and maintenance quality of the track directly determine the service life of the wheels of Henan Mine Crane manufactured crane. The uneven track, excessive straightness, uneven spacing, and loose joints are important causes of rapid wheel wear.Industry data show that every 10 meters of track has a straightness deviation of more than 3 mm, and the wear will be greatly aggravated.When the equipment travels to the defective part of the track, it will produce bumps and shocks, resulting in dot-like and wavy wear on the tread, coupled with the continuous friction of the track micro-displacement, it will form a vicious circle of track deformation and wheel wear that intensify each other.

Excessive wheel loads

Overloading operations and uneven load distribution are the core human causes of wheel wear.Many companies are overloaded for a long time in order to catch up with the construction period, and problems such as deformation of the main beam and unilateral overloading will cause the carrying pressure of a single wheel to far exceed the design threshold.According to the principle of mechanical wear, high-pressure loads will destroy the hardened layer on the surface of the wheel, accelerate metal fatigue, and cause tread creasing, peeling, and rapid wear.At the same time, the inertial impact force generated by frequent emergency start-stop and cable-stayed slanting will further increase wheel loss and significantly shorten the service life of equipment accessories.

Poor wheel material selection

The material and heat treatment process of the wheel directly determine its wear resistance and fatigue resistance. Improper material selection is a common cause of premature wheel aging.In order to control costs, some enterprises choose non-standard wheels with ordinary carbon steel, poor forging technology or substandard heat treatment. The hardened layer of such wheels is weak and the hardness and toughness are insufficient.Under the conditions of continuous friction and heavy-duty impact, problems such as plastic deformation of the tread and surface shedding can easily occur.In addition, light-duty standard wheels are optional for heavy-duty and high-frequency operation scenarios, and the material performance cannot be adapted to the working conditions, which will also cause the wheels to wear out quickly and be scrapped.

Inadequate lubrication

Standardized lubrication is the basic means to delay wheel wear, and insufficient lubrication and maintenance is an operation and maintenance loophole that can easily be ignored.The long-term lack of oil on the contact surface of the wheel track and the bearing, the wrong selection of grease, and the accumulation of impurities will put the equipment in a state of dry friction, greatly increasing the coefficient of friction and speeding up the wear rate.Impurities such as on-site sand, gravel, iron shavings, etc. entering the contact surface will form abrasive particles and wear, and scratches on the tread will produce pits and scratches.At the same time, lubrication failure will also cause the bearing to heat up and stagnate, resulting in poor wheel rotation, partial wear and other failures.

Harsh operating conditions

Harsh operating conditions will greatly speed up the wear rate of crane wheels, and various loss incentives are common in steel mills, mines, chemical industry, outdoor construction sites and other scenes.The high temperature environment will weaken the metal strength of the wheel and accelerate the aging of the surface.Wet, rainy and snowy weather can easily cause rust on the track and wheels, exacerbating friction loss.On-site dust and iron shavings will cause continuous abrasive wear, while acid-base corrosion will destroy the surface structure of the wheel.Compared with standard indoor working conditions, the wheel wear speed can be increased by 2 to 3 times in harsh environments such as corrosion, dust, and high temperature.

How Different Types of Crane Wheel Wear Develop

Crane wheel wear is not a single form, and different causes of failure will correspond to different types of wear.Only by accurately identifying wear patterns and figuring out the development patterns of various types of wear can we solve problems in a targeted manner and avoid blind maintenance and replacement.Wheel wear in the industry is mainly divided into four categories, and the development process and fault characteristics of various types of wear are as follows.

Flange wear

Rim wear is the most common wear failure of cranes. It is mostly caused by wheel misalignment, track offset, and equipment walking deviation. It is mainly manifested as rim thinning, burr, and severe wear on one side.The fault developed in a gradual manner, with only slight loss and no obvious abnormal noise in the initial stage.In the mid-term, the thickness of the rims decreased sharply, and there was friction noise and slight deviation when walking.Excessive wear and tear in the later stage will completely lose the ability to limit the position, which can easily cause derailment, caton and even rim fracture accidents, which is also the core reason for most wheels to be scrapped in advance.

Tread wear

Tread wear occurs on the bearing contact surface of the wheel and the track, and is often manifested as the tread is flattened, thinned, wavy lines or local grooves, mainly caused by long-term overload, insufficient lubrication, uneven track, and impurity abrasion.The law of its wear process is clear, and the initial size is only slightly reduced, which does not affect the operation of the equipment.Uneven wear and tear occurred in the mid-term, and the equipment shook slightly when walking.Excessive wear in the later stage will cause heavy-duty jitter, braking offset, and peeling off of the surface, which will greatly reduce operating stability and accelerate track damage.

Uneven wheel wear

Uneven wear is also called partial wear. It is manifested as a large difference in the wear of the left and right wheels and the same side of the wheels, and the local depression loss is serious. It is mostly caused by the tilt of the wheel installation, uneven force on the four wheels, deformation of the main beam, excessive track height difference and unilateral overload.The fault is extremely concealed, and it is difficult to identify with the naked eye at the beginning, but it continues to destroy the walking balance.After the wear difference expands, the problem of equipment jitter and deviation will intensify, which will not only accelerate the scrap of the wheels, but also pull the steel structure, causing irreversible damage such as equipment accuracy degradation and fuselage aging.

Cracks and surface damage

Cracks, peeling, peeling, and pits are severe surface damage to the wheels, which are mostly caused by long-term fatigue and wear, heavy-duty impact, substandard materials, and corrosion conditions.At the beginning of the failure, there are only fine surface scratches and microcracks, which are not easy to investigate. As the equipment continues to operate, the stress continues to accumulate, and the cracks will continue to expand in depth.In the later stage, the surface surface will fall off and penetrating cracks will occur, which will greatly reduce the strength of the wheel structure. There is a risk of fracture and collapse, and there is no repair value. Once found, it must be replaced immediately to prevent the equipment from operating with diseases.

How to Identify Crane Wheel Wear Problems Early

Crane wheel wear is a gradual process, and there is a sufficient window for intervention from mild loss to severe failure.The core reason for the frequent failures of most enterprises is the lack of awareness of early troubleshooting and the missed opportunity for rectification.Mastering the following three types of early identification methods can predict the hidden dangers of wear in advance and realize pre-failure control.

Visual inspection signs

Visual inspection is the simplest and most frequent way of troubleshooting. It is suitable for daily pre- and post-shift inspections. No professional equipment is required, and dominant wear problems can be quickly identified.Daily inspections need to focus on three core parts.First, check the rim to see if there are thinning, burrs, gaps, and severe wear on one side.The second is to tread the surface, check whether the surface is smooth, for scratches, pits, peeling, wave wear, partial shedding and other problems.Third, the wheel as a whole, compare the degree of wear of the same side and diagonal wheels to determine whether there is partial wear and dimensional deviation.At the same time, the wheel diameter, rim thickness, and tread wear can be measured with the help of simple measuring tools, and the standard parameters of the equipment can be compared. Once the wear exceeds 10% of the standard threshold value, it can be determined as early abnormal wear. The cause needs to be investigated and rectified in time to avoid the continuous intensification of wear.

Abnormal noise and vibration

Abnormal wear and tear of the wheels in the early stage will be accompanied by obvious abnormal operating noise and vibration changes, which is an important early warning signal.Under normal conditions, the crane walks smoothly, the noise is uniform, and there is no obvious vibration.If there is continuous metal friction noise, sharp rail gnawing sound, and caton noise when the equipment is walking, it is highly likely that it is caused by abnormal friction between the rim and the track, uneven tread wear, and lubrication failure.If periodic shaking, fuselage shaking, and local vibration intensify during walking, it means that the wheels have problems such as uneven wear, surface irregularities, and bearing wear and stagnation.In daily operation and maintenance, as long as there are irregular abnormal noises and vibration changes, there is no need to wait for wear marks visible to the naked eye, and it can be stopped for troubleshooting to avoid severe failures in advance.

Changes in crane travel

The subtle changes in the walking state of the crane are the core basis for judging wheel wear and abnormal alignment.Early wear and dislocation problems will directly change the walking trajectory and operating state of the equipment.Common abnormal manifestations include the crane's walking deviation, inability to travel in a straight line, walking caton, obvious start-stop shaking, and inconsistent walking speed on both sides.Some equipment will also have problems such as continuous edge gnawing on one side of the track, increased wheel walking resistance, smooth no-load walking and heavy-duty caton. These are typical early symptoms of wheel wear, alignment deviation, and uneven load.Once it is found that the walking state is abnormal, it must be stopped immediately for testing, priority should be given to investigating wheel wear, track accuracy, and installation alignment problems, and the hidden dangers must be solved from the root cause.

How to Prevent Crane Wheels from Wearing Out Quickly

The rapid wear and tear of crane wheels can be prevented and controlled, and there is no need for frequent replacement of accessories and passive maintenance.Combining the causes of wear and the law of failure, through standardized installation, standardized operation, refined operation and maintenance, and rationalized selection, the service life of the wheels can be greatly extended and the abnormal wear and failure can be reduced by more than 90%. A complete set of prevention plans with strong implementation are as follows.

Maintain wheel and rail alignment

Precise alignment is the core foundation to prevent abnormal wear and tear.After the equipment is newly installed, overhauled, and the wheels or tracks are replaced, professional measuring tools must be used to calibrate the level, verticality, wheel track, and diagonal dimensions of the wheels to ensure that all wheels are parallel, symmetrical, and fit perfectly with the track to eliminate offset, tilt, and misalignment problems.In daily operation and maintenance, the wheel alignment accuracy and track parallelism are regularly checked every quarter, and the deviation is fine-tuned in time.In view of the wheel skew caused by the deformation of the main beam and the offset of the end beam, the accuracy of the steel structure needs to be corrected synchronously to eliminate the problem of lateral friction and rail gnawing from the root cause.Maintaining precise alignment for a long time can directly reduce rim wear and uneven wear by 80%.

Control operating loads

Standardizing load operation is a key artificial control method to delay wheel wear.Strictly abide by the rated load standards of Henan Mine Crane manufactured cranes to prevent long-term overload and extreme load operations. It is strictly forbidden to cable-stayed and single-sided heavy loads to avoid overload of a single wheel.Optimize operating habits, eliminate frequent emergency start, emergency braking, and high-speed start and stop, and reduce the damage of inertial impact to the wheel tread.For equipment with uneven force on four wheels, the force balance is regularly checked, and the load is evenly distributed by fine-tuning the wheel height and alignment accuracy to avoid excessive local pressure and accelerated wear.Stable and standardized load operation can greatly slow down the metal fatigue of the wheels and extend the service life.

Select suitable wheel materials

On-demand selection is a prerequisite for eliminating premature aging and wear from the hardware level.Enterprises need to match high-quality wheels of corresponding specifications and materials according to crane tonnage, operating frequency, and working conditions, so as to eliminate low-cost and inferior non-standard products.For conventional heavy-duty cranes, high-strength alloy forged wheels are preferred. After overall heat treatment and high-frequency quenching of the tread, the hardness of the tread is guaranteed to be up to standard, the thickness of the hardened layer is sufficient, and the wear resistance and impact resistance are both high.24-hour continuous operation, high temperature, high dust and other harsh working conditions, customized wheels with thickened hardened layer, corrosion resistance and fatigue resistance need to be selected to meet the needs of high-intensity operations.Do not blindly choose low-cost wheels with ordinary carbon steel and substandard heat treatment. It will save procurement costs in the short term and increase operation and maintenance and downtime losses exponentially in the long term.

Improve rail conditions

The quality of the track directly determines the rate of wheel wear, and a normalized track maintenance mechanism needs to be established.Regularly check the straightness, level, and spacing accuracy of the track, and promptly correct the offset, deformation, and height gap of the track that exceeds the standard, to ensure that the straightness deviation of 10 meters is controlled within 3 mm.Deal with the gaps, steps, and damaged positions of the track joints in a timely manner, and polish the burrs and bumps of the joints.Tighten loose track pressure plates and bolts to prevent micro-displacement of track operation.Regularly clean up dust, iron shavings, sand and gravel and other impurities on the surface of the track to avoid abrasive wear.Under humid and corrosive conditions, the track is regularly treated with anti-rust and anti-corrosion treatment to reduce the loss of oxidized rust to the wheels.A flat, stable and clean track is the core guarantee for extending the life of the wheels.

Follow a regular maintenance schedule

Systematic maintenance is the core guarantee for long-term wear prevention and control and prolonging equipment life.Establish a special maintenance ledger for crane wheels, implement daily inspection, weekly inspection, monthly inspection, and annual inspection systems, and realize early detection and early rectification of hidden dangers.Do a good job in the daily lubrication and maintenance of wheel bearings and walking mechanisms, choose lubricating greases suitable for working conditions, and regularly replenish and change oil to eliminate dry friction operation.The frequency of lubrication should be appropriately encrypted under harsh working conditions.Regularly detect the amount of wheel wear, surface state, and crack defects, polish minor wear, scratches, and burrs in time, and replace the wheels with excessive wear and crack damage in time to avoid the expansion of minor faults.At the same time, the status of the transmission system, braking system, and steel structure is checked synchronously to ensure that the operation of the whole machine is matched and stable, and the wheels are protected from the whole system dimension to reduce abnormal losses.

Extend Crane Wheel Life with Proper Maintenance and Design

To maximize the life of crane wheels and completely solve the problem of frequent wear and tear, it is necessary to break the passive maintenance thinking, rely on the full-dimensional systematic control of product design, installation and construction, daily operation, and late maintenance, and build an active preventive operation and maintenance system to reduce the rate of wheel loss in all directions. The specific control points are as follows：

• Optimize product design: Professional manufacturers will optimize the wheel structure in a targeted manner based on the tonnage of equipment, operating frequency and working conditions, adopt high-precision forging technology, and match reasonable tread and rim curvature to optimize the force distribution.In view of harsh scenarios such as high load, high corrosion, and dust, the material and structural strength are upgraded to effectively improve the wear resistance, impact resistance, and corrosion resistance of the wheels, and the problem of premature aging and wear is avoided from the design end.
• Strict control of installation accuracy: strictly implement high-precision installation standards, accurately calibrate the matching accuracy of wheels, walking tracks, steel structures and transmission systems of the whole machine, and correct various offset, misalignment, and tilt problems.Eliminate alignment deviations, track and other basic defects from the installation link, avoid lateral friction and local overload when the equipment is running, and reduce the occurrence of abnormal wear and tear from the root cause.
• Standardize operating operations: establish standardized lifting operating procedures, strictly control the rated load, and eliminate illegal operations such as overload, cable-stayed slanting, and unilateral heavy loads.At the same time, standardize the rhythm of equipment start and stop, avoid frequent emergency start and stop, high-speed operation, greatly reduce the damage of inertial impact force to the wheel tread, delay wheel metal fatigue through standardized operation, and extend the service life of accessories.
• Implement fine maintenance: establish a normalized inspection, lubrication, correction, replacement and maintenance system, regularly detect wheel wear status, track accuracy, and bearing working conditions, and deal with minor faults and hidden dangers in a timely manner.Adjust the maintenance frequency according to the operating environment, do a good job of lubrication, maintenance and equipment calibration, and continuously maintain the best operating condition of the crane to avoid the accumulation of minor faults and cause severe wear and tear.

A large number of on-site operation and maintenance data have confirmed that through the above full-dimensional systematic control, the service life of crane wheels can be effectively extended by 2-3 times, and the failure rate of equipment walking failures can be reduced by more than 90%.It can not only significantly reduce the operation and maintenance costs of parts replacement, shutdown and maintenance, equipment rectification, etc., but also ensure the long-term stable and safe operation of the crane, and provide a stable guarantee for the continuous production and operation of the enterprise.

Henan Mine Crane Factory Custom Custom

The premature aging and wear of crane wheels is the result of the comprehensive effects of equipment installation, track conditions, material matching, operating specifications and maintenance quality, and is not simply the natural loss of accessories.All kinds of wear problems have a clear evolution process and pre-signs. Through normalized condition monitoring and early troubleshooting, hidden faults can be identified in advance.Implement scientific and refined equipment management to ensure the long-term stable operation of lifting equipment.

Industrial and mining enterprises that have long suffered from frequent wheel wear, repeated replacement, downtime and missed work can rely on professional crane manufacturing and supporting operation and maintenance solutions to completely improve.Henan Mine Crane Factory relies on mature structural design, accurate supporting technology and wheel material selection standards adapted to multiple conditions, combined with a strong maintenance guidance plan, to help enterprises significantly extend the service life of the wheels.Reduce operation and maintenance costs from the source, avoid safety risks such as derailment and jitter, so that every lifting equipment can maintain an efficient, safe and stable long-term operating state.