Tag Archives: rch hydraulic

China manufacturer Rch Series Hollow Plunger Hydraulic Cylinder for Testing with Great quality

Product Description



1. Stable quality ,lowest price and considerate service


2. Spindle possesses automatic retraction function


3. Painted surface corrosion and beautiful


4. The Hollow plunger cylinders allows for both pull and push forces


5. Every type contains a 3/8 fast connector

Model Number Cylinder Capacity (ton) Max Stroke (mm) Collapsed Height A (mm) Cylinder Effective Area (cm²) Oil Capacity (m³) Weight (kg) Cylinder O.D Cylinder I.D Piston Diameter
(mm) (mm) (mm)
RCH-120 13(125) 8 55 17.9 14 1.5 69 54.1 35.1
RCH-121 42 120 17.9 75 2.8 69 54.1 35.1
RCH-1211 42 120 17.9 75 2.8 69 54.1 35.1
RCH-123 76 184 17.9 136 4.4 69 54.1 35.1
RCH-202 20(215) 49 162 30.7 150 7.7 98 73.1 54.1
RCH-206 155 306 30.7 476 14.1 98 73.1 54.1
RCH-302 30(326) 64 178 46.6 298 10.9 114 88.9 63.5
RCH-306 30(326) 155 330 46.6 722 21.8 114 88.9 63.5
RCH-603 60(576) 64 247 82.3 626 28.1 159 123.9 91.9
RCH-606 153 323 82.3 1259 35.4 159 123.9 91.9
RCH-1003 95(931) 76 254 133 1011 63 212 165.1 127


How to Replace a Bearing

If you want to select a bearing for a specific application, you should know a few basics. This article will give you an overview of ball, angular contact, and sliding-contact bearings. You can choose a bearing according to the application based on the characteristics of its material and preload. If you are not sure how to choose a bearing, try experimenting with it. The next step is to understand the Z-axis, which is the axes along which the bearing moves.

Z axis

When it comes to replacing your Z axis bearing, there are several things you must know. First, you need to make sure that the bearings are seated correctly. Then, you should check the tension and rotation of each one. To ensure that both bearings are equally tensioned, you should flex the Core to the desired angle. This will keep the Z axis perpendicular to the work surface. To do this, first remove the Z axis bearing from its housing and insert it into the Z axis motor plate. Next, insert the flanged bearing into the Z axis motor plate and secure it with 2 M5x8mm button head cap screws.
Make sure that the bearing plate and the Z Coupler part are flush and have equal spacing. The spacing between the 2 parts is important, as too much spacing will cause the leadscrew to become tight. The screws should be very loose, with the exception of the ones that engage the nylocks. After installing the bearing, the next step is to start the Z axis. Once this is done, you'll be able to move it around with a stepper.

Angular contact

Ball bearings are made with angular contacts that result in an angle between the bearing's races. While the axial load moves in 1 direction through the bearing, the radial load follows a curved path, tending to separate the races axially. In order to minimize this frictional effect, angular contact bearings are designed with the same contact angle on the inner and outer races. The contact angle must be chosen to match the relative proportions of the axial and radial loads. Generally, a larger contact angle supports a higher axial load, while reducing radial load.
Ball bearings are the most common type of angular contact bearings. Angular contact ball bearings are used in many applications, but their primary purpose is in the spindle of a machine tool. These bearings are suitable for high-speed, precision rotation. Their radial load capacity is proportional to the angular contact angle, so larger contact angles tend to enlarge with speed. Angular contact ball bearings are available in single and double-row configurations.
Angular contact ball bearings are a great choice for applications that involve axial loads and complex shapes. These bearings have raceways on the inner and outer rings and mutual displacement along the axial axis. Their axial load bearing capacity increases as the contact Angle a rises. Angular contact ball bearings can withstand loads up to 5 times their initial weight! For those who are new to bearings, there are many resources online dedicated to the subject.
Despite their complexity, angular contact ball bearings are highly versatile and can be used in a wide range of applications. Their angular contact enables them to withstand moderate radial and thrust loads. Unlike some other bearings, angular contact ball bearings can be positioned in tandem to reduce friction. They also feature a preload mechanism that removes excess play while the bearing is in use.
Angular contact ball bearings are made with different lubricants and cage materials. Standard cages for angular contact ball bearings correspond to Table 1. Some are machined synthetic resins while others are molded polyamide. These cage materials are used to further enhance the bearing's axial load capacity. Further, angular contact ball bearings can withstand high speeds and radial loads. Compared to radial contact ball bearings, angular contact ball bearings offer the greatest flexibility.

Ball bearings

Ball bearings are circular structures with 2 separate rings. The smaller ring is mounted on a shaft. The inner ring has a groove on the outer diameter that acts as a path for the balls. Both the inner and outer ring surfaces are finished with very high precision and tolerance. The outer ring is the circular structure with the rolling elements. These elements can take many forms. The inner and outer races are generally made of steel or ceramic.
Silicon nitride ceramic balls have good corrosion resistance and lightweight, but are more expensive than aluminum oxide balls. They also exhibit an insulating effect and are self-lubricating. Silicon nitride is also suitable for high-temperature environments. However, this type of material has the disadvantage of wearing out rapidly and is prone to cracking and shattering, as is the case with bearing steel and glass. It's also less resistant to heat than aluminum oxide, so it's best to buy aluminum nitride or ceramic ball bearings for applications that are subjected to extremely high temperatures.
Another type of ball bearings is the thrust bearing. It has a special design that accommodates forces in both axial and radial directions. It is also called a bidirectional bearing because its races are side-by-side. Axial ball bearings use a side-by-side design, and axial balls are used when the loads are transmitted through the wheel. However, they have poor axial support and are prone to separating during heavy radial loads.
The basic idea behind ball bearings is to reduce friction. By reducing friction, you'll be able to transfer more energy, have less erosion, and improve the life of your machine. With today's advances in technology, ball bearings can perform better than ever before. From iron to steel to plastics, the materials used in bearings have improved dramatically. Bearings may also incorporate an electromagnetic field. So, it's best to select the right 1 for your machine.
The life expectancy of ball bearings depends on many factors, including the operating speed, lubrication, and temperature. A single million-rpm ball bearing can handle between 1 and 5 million rotations. As long as its surface contact area is as small as possible, it's likely to be serviceable for at least 1 million rotations. However, the average lifespan of ball bearings depends on the application and operating conditions. Fortunately, most bearings can handle a million or more rotations before they start showing signs of fatigue.

Sliding-contact bearings

The basic principle behind sliding-contact bearings is that 2 surfaces move in contact with 1 another. This type of bearing works best in situations where the surfaces are made of dissimilar materials. For instance, a steel shaft shouldn't run in a bronze-lined bore, or vice versa. Instead, 1 element should be harder than the other, since wear would concentrate in that area. In addition, abrasive particles tend to force themselves into the softer surface, causing a groove to wear in that part.
Sliding-contact bearings have low coefficients of friction and are commonly used in low-speed applications. Unlike ball and roller bearings, sliding contact bearings have to be lubricated on both sides of the contacting surfaces to minimize wear and tear. Sliding-contact bearings generally are made of ceramics, brass, and polymers. Because of their lower friction, they are less accurate than rolling-element bearings.
Sliding-contact bearings are also known as plain or sleeve bearings. They have a sliding motion between their 2 surfaces, which is reduced by lubrication. This type of bearing is often used in rotary applications and as guide mechanisms. In addition to providing sliding action, sliding-contact bearings are self-lubricating and have high load-carrying capacities. They are typically available in 2 different types: plain bearings and thrust bearings.
Sliding-contact linear bearing systems consist of a moving structure (called the carriage or slide) and the surfaces on which the 2 elements slide. The surfaces on which the bearing and journal move are called rails, ways, or guides. A bore hole is a complex geometry, and a minimum oil film thickness h0 is usually used at the line of centers. It is possible to have a sliding-contact bearing in a pillow block.
Because these bearings are porous, they can absorb 15 to 30% of the lubrication oil. This material is commonly used in automobile and machine tools. Many non-metallic materials are used as bearings. One example is rubber, which offers excellent shock absorbency and embeddability. While rubber has poor strength and thermal conductivity, it is commonly used in deep-well pumps and centrifugal pumps. This material has high impact strength, but is not as rigid as steel.

China manufacturer Rch Series Hollow Plunger Hydraulic Cylinder for Testing     with Great qualityChina manufacturer Rch Series Hollow Plunger Hydraulic Cylinder for Testing     with Great quality

China Good quality 20 to 100 Ton Rch Hydraulic Hollow Plunger Jack Cylinder Price with Free Design Custom

Product Description


RCH series single acting hollow plunger hydraulic jack cylinder


Feature of hydraulic cylinder

1.Hollow plunger design allows for both pill and push forces.

2.Single-acting spring return. 

3.Baked enamel finish for increased corrosion resistance. 

4.Collar threads for easy fixturing. 

5.stable quality ,lowest price and considerate service; 

6. Spindle possesses automatic retraction function; 

7. Painted surface corrosion and beautiful; 

8. The Hollow plunger cylinders allows for both pull and push forces. 

9. Every type contains a 3/8 fast connector.


Parameter of hydraulic cylinder

Item No. RCH-2050 RCH-25710 RCH-3050 RCH-35710 RCH-6050 RCH-65710 RCH-10075
Output(T) 20 20 30 30 60 60 100
Stoke(mm) 50 100 50 100 50 100 75
Effective area(cm2) 22.9 22.9 36.29 36.29 67.89 67.89 94.98
Oil Capacity(L) 0.16 0.32 0.25 0.5 0.45 0.9 1.2
Height of products(mm) 153 217 153 217 164 231 254
Extended height(mm) 214 328 214 328 225 342 340
Outside(mm) 98 98 115 115 155 155 180
Bore die(mm) 73 73 88 88 125 125 140
Principal Dia(mm) 54 54 68 68 93 93 110
Thead for input oil-port(ZG) 27 27 34 34 54 54 79

Saddle protrusion form  


3/8" 3/8" 3/8" 3/8" 3/8" 3/8" 3/8"
Weight(kg) 7.2 10 10 13.4 17.2 23.2 41


Preventative Maintenance on Tractor Parts

You should not take your tractor out of commission by replacing the parts that are not working properly. You should be proactive about maintaining your tractor parts to ensure that they work well and are of the highest quality. You should also check if the company is 10 years old or more, as this will ensure that they have enough experience to handle warranty issues and any other problems. Lastly, you should check if the tractor parts company has a good reputation. Having a long standing company that is available around the clock is a plus.


Preventative maintenance of tractor parts

Performing preventative maintenance on tractor parts will help you avoid unexpected breakdowns and enhance its efficiency. Whether you're the sole owner of a tractor or a part-owner, you should know which parts you need and where to find them. Having spares available is also important, as they can help you solve problems quickly. Listed below are some of the parts you need to know about. These components are essential for your tractor's engine.

To maintain your tractor's internal components, check for wear. Lubricate internal parts regularly to reduce friction. When possible, bring your tractor to a dealer for a thorough inspection. Additionally, remember to keep the tractor's air filter clean. Dust in the air strains the tractor's engine, and a dirty air filter can cause a lot of damage. By following the manufacturer's instructions for proper maintenance, you can avoid costly repairs down the road.

For oil changes, check the owner's manual for recommended oil change intervals. Make notes in the manual about the parts you'll need. You can also refer to the manufacturer's PM checklist. Depending on the type of tractor you own, you may need to change the oil once a year or more often. To keep your tractor running optimally, drain old oil after every use. The same goes for hydraulic fluid. Over time, it can become contaminated with particles and water. Therefore, it's best to change it every year.

Modern tractors use a cooling system with fans and radiators. This system operates in varying temperatures and if it breaks down, you risk damaging the engine's core parts. In addition, you should store your tractor's battery under climate control. A battery maintainer can be purchased at any auto parts store. It's a great idea to regularly inspect your tractor's engine for problems as early as possible.

Types of tractor clutches

In a modern tractor, there are many types of transmission systems, and this article compares the pros and cons of each type. The original drive system of tractors relied on a clutch to change gears and range and engage/disengage the PTO drive. The clutch was usually a two-stage design; a full depression disengaged all drive systems while a partial depression only disengaged the gearbox. Today, these systems are independent.

The friction plate is a steel plate with a splined central hub. It features annular friction facings and is held between the flywheel and pressure plate. It has splines that limit its axial travel along the gearbox's driving shaft and dampen torsional vibrations. Single-plate clutches are most commonly used in heavy agricultural equipment. While they were initially developed as a cost-effective alternative to drum brakes, they quickly gained popularity due to their low price and ease of use.

Another type of tractor clutch is the wrap-spring. These use a special cast-iron spring. This spring is able to transmit torque to the driven plate when the tractor is operating at normal engine speed, while the clutch springs help transmit torque to the driven plate when the engine is running at high engine speeds. The wrap-spring clutches must be lubricated with light oil and should be checked for deterioration after a few years.

The advantages and disadvantages of these types of clutches are explained briefly. They are generally made from high-quality materials and contain a high copper content. They have high-friction properties and can transfer heat effectively to the engine. The friction coefficient of these types of clutches ranges from 0.33 to 0.4. As a result, they are the best choice for intensive applications. In conclusion, there are many advantages and disadvantages of each type of tractor clutch.


Types of tractor transmission gears

There are several different types of tractor transmission gear. One of the most common is hydrostatic. A hydrostatic transmission works like a standard manual transmission, and operates with a pedal. To operate a hydrostatic transmission, you simply select the gear and engine speed you want, push the pedal, and the hydraulic oil turns the gears. Because this type of transmission is clutchless, it provides smooth forward/backward operation without the need for a manual shifter.

Tractor transmissions come in several types and have different features. Some of these systems are better for certain types of work than others, and you'll find different types depending on the size and type of your tractor. Many tractors have 2 types of transmissions: geared speed and power shift. Each type offers different benefits, and they vary in cost and ease of use. There's a geared speed transmission, a synchromesh transmission, and a power shift transmission.

A CVT (continuously variable transmission) is another popular option. Like hydro, CVTs use a belt to transfer power from the engine to the wheels. These tractors can shift gears with little effort. These tractors can reach up to 4 speeds without the need for a clutch. Powershift transmissions are simpler and more durable than CVTs. They're also easier to repair. But a CVT may be the better choice for your farm tractor.

Hydrostatic and power shuttle transmissions allow you to shift gears and direction without the use of a clutch. Hydrostatic transmissions are usually hydraulically actuated, which makes it easy to change gears without using the clutch. Similarly, power shuttle transmissions are great for heavy-duty forward-and-reverse shifting. In either case, the clutches are hydraulically actuated and bathed in oil.

Types of CZPT fittings

In a nutshell, there are 2 types of CZPT fittings: standard and grease-fill. Standard CZPTs have 3 to 4 pumps of grease per fitting. Grease-filled CZPTs tend to attract dirt, dust, and sand, which can damage moving parts. Keeping these parts clean is crucial to their long-term performance. Using a rag to wipe off excess grease is an excellent way to ensure that the seals remain as sealed as possible.

There are different types of grease-filling tools available. Some are specifically designed to clear blocked CZPTs. These tools are used to fill the CZPT fitting with grease or diesel fuel and hit the fitting with a hammer. Be sure to use high-quality fitting rejuvenators, as cheap ones are less effective. These are also harder to find than grease-filling tools. To avoid these issues, use the proper tools when servicing your tractor.

CZPT fittings are used for many different kinds of tractor parts. You may find them on lawn equipment, construction equipment, and farming equipment. If you are unsure of what type your equipment has, ask your local CZPT dealer or visit 1 of their 17,000 CZPT AutoCare locations. Don't forget to regularly grease these parts for the best performance. When you don't have time to do so, they can lead to costly repairs.

Standard CZPTs feature a dome-shaped nipple that makes it easy to spot. Flow-stop fittings feature a ball check valve that reduces backflow during lubrication. Drive-type CZPTs feature a special coupler with a cross-pin to provide a positive lock. This type of grease CZPT eliminates the need for tapping during servicing.


Preventative maintenance of tractor's CZPT fittings

Proper grease application and regular inspections are important parts of CZPT fittings. If a CZPT becomes stuck in an opening, the ball may not be able to come out. Lubrication around CZPTs is important as grease can damage the components and cause bigger problems. A tractor's CZPT fittings are part of the tractor's electrical system, so it is important to replace them when they become damaged.

Grease CZPTs allow the addition of grease at the manufacturer's specifications. These fittings consist of a spring and metal ball inside a nipple. The grease gun compresses the spring and releases the ball from the nipple opening. Grease CZPTs are essential parts of heavy equipment, as a failed grease CZPT may cause brake failures and other systems to fail. Failure to maintain these fittings can cause rollover accidents.

Greasing the CZPTs is a vital part of regular tractor maintenance. Greasing the CZPTs will prevent your tractor's bearings from sticking and make your work easier. Grease the CZPTs on pivot points and joints to keep them lubricated and running smoothly. For easy grease application, consider using a battery-powered grease gun. Once you have lubricated the CZPTs, you can move on to other parts of the tractor.

In addition to grease, you should check for leaks on your tractor's CZPTs regularly. If you notice dirt buildup, there might be a leak. You can also check for any worn hoses to avoid major problems. If there is a leak, tighten the fittings and replace worn ones as soon as possible to avoid further damage. By performing these tasks regularly, you can increase the efficiency of your tractor and avoid unexpected breakdowns.

China Good quality 20 to 100 Ton Rch Hydraulic Hollow Plunger Jack Cylinder Price     with Free Design CustomChina Good quality 20 to 100 Ton Rch Hydraulic Hollow Plunger Jack Cylinder Price     with Free Design Custom

China high quality Rch Series Single Acting Hydraulic Lifting Cylinder with Great quality

Product Description

RCH Series Single Acting Hydraulic Lifting Cylinder

1. Describe:
RCH series of single acting hollow hydraulic cylinder has all the function of general hydraulic cylinder, and it also has the function of pulling. It also used for tension PC strands, steel wire,axle and drill rod.

2. Features:
1) Single acting hollow cylinder.
2) It is matching single-track manual oil pump.
3) It can be customized.

3. Technology data:

Model Capacity
Efficiency area
Capacity of hydraulic oil
Close height
Extend height
Outer diameter
Center hole
RCH-120 12(128) 8 17.9 14 56 63 70 19.6 1.5
RCH-121 41 17.9 73 121 162 70 19.6 2.8
RCH-1211 41 17.9 73 121 162 70 19.6 2.8
RCH-123 76 17.9 136 184 260 70 19 4.4
RCH-202 20(196) 51 30.5 156 162 213 99 26.9 7.7
RCH-206 155 30.5 473 306 461 99 26.9 14.1
RCH-302 30(294) 63 46.6 294 179 242 127 33.3 10.9
RCH-306 156 46.6 727 330 486 127 33.3 21.8
RCH-603 60 (588) 76 82.2 625 248 324 159 53.8 28.1
RCH-606 152 82.2 1249 324 476 159 53.8 35.4
RCH-1003 100(980) 76 133.1 1012 254 330 213 79 59.9

If the model you are looking for is not available, please contact us! We will customize it according to your needs.


How to tell if your driveshaft needs replacing

What is the cause of the unbalanced drive shaft? Unstable U-joint? Your car may make clicking noises while driving. If you can hear it from both sides, it might be time to hand it over to the mechanic. If you're not sure, read on to learn more. Fortunately, there are many ways to tell if your driveshaft needs replacing.


An unbalanced driveshaft can be the source of strange noises and vibrations in your vehicle. To fix this problem, you should contact a professional. You can try a number of things to fix it, including welding and adjusting the weight. The following are the most common methods. In addition to the methods above, you can use standardized weights to balance the driveshaft. These standardized weights are attached to the shaft by welders.
An unbalanced drive shaft typically produces lateral vibrations per revolution. This type of vibration is usually caused by a damaged shaft, missing counterweights, or a foreign object stuck on the drive shaft. On the other hand, torsional vibrations occur twice per revolution, and they are caused by shaft phase shifts. Finally, critical speed vibration occurs when the RPM of the drive shaft exceeds its rated capacity. If you suspect a driveshaft problem, check the following:
Manually adjusting the imbalance of a drive shaft is not the easiest task. To avoid the difficulty of manual balancing, you can choose to use standardized weights. These weights are fixed on the outer circumference of the drive shaft. The operator can manually position the weight on the shaft with special tools, or use a robot. However, manual balancers have many disadvantages.


When the angular velocity of the output shaft is not constant, it is unstable. The angular velocity of the output shaft is 0.004 at ph = 29.5 and 1.9 at t = 1.9. The angular velocity of the intermediate shaft is not a problem. But when it's unstable, the torque applied to it is too much for the machine. It might be a good idea to check the tension on the shaft.
An unstable drive shaft can cause a lot of noise and mechanical vibration. It can lead to premature shaft fatigue failure. CZPT studies the effect of shaft vibration on the rotor bearing system. They investigated the effect of flex coupling misalignment on the vibration of the rotor bearing system. They assume that the vibrational response has 2 components: x and y. However, this approach has limited application in many situations.
Experimental results show that the presence of cracks in the output shaft may mask the unbalanced excitation characteristics. For example, the presence of superharmonic peaks on the spectrum is characteristic of cracks. The presence of cracks in the output shaft masks unbalanced excitation characteristics that cannot be detected in the transient response of the input shaft. Figure 8 shows that the frequency of the rotor increases at critical speed and decreases as the shaft passes the natural frequency.


If you're having trouble driving your car, chances are you've run into an unreliable driveshaft. This type of drivetrain can cause the wheels to stick or not turn at all, and also limit the overall control of the car. Whatever the reason, these issues should be resolved as soon as possible. Here are some symptoms to look for when diagnosing a driveshaft fault. Let's take a closer look.
The first symptom you may notice is an unreliable drive shaft. You may feel vibrations, or hear noises under the vehicle. Depending on the cause, it could be a broken joint or a broken shaft. The good news is that driveshaft repairs are generally relatively inexpensive and take less time than a complete drivetrain replacement. If you're not sure what to do, CZPT has a guide to replacing the U-connector.
One of the most common signs of an unreliable driveshaft is clanging and vibration. These sounds can be caused by worn bushings, loose U-joints, or damaged center bearings. This can cause severe vibration and noise. You can also feel these vibrations through the steering wheel or the floor. An unreliable driveshaft is a symptom of a bigger problem.

Unreliable U-joints

A car with an unreliable U-joint on the drive shaft can be dangerous. A bad u-joint can prevent the vehicle from driving properly and may even cause you trouble. Unreliable u-joints are cheap to replace and you should try getting parts from quality manufacturers. Unreliable U-joints can cause the car to vibrate in the chassis or gear lever. This is a sure sign that your car has been neglected in maintenance.
Replacing a U-joint is not a complicated task, but it requires special tools and a lot of elbow grease. If you don't have the right tools, or you're unfamiliar with mechanical terminology, it's best to seek the help of a mechanic. A professional mechanic will be able to accurately assess the problem and propose an appropriate solution. But if you don't feel confident enough, you can replace your own U-connector by following a few simple steps.
To ensure the vehicle's driveshaft is not damaged, check the U-joint for wear and lubrication. If the U-joint is worn, the metal parts are likely to rub against each other, causing wear. The sooner a problem is diagnosed, the faster it can be resolved. Also, the longer you wait, the more you lose on repairs.

damaged drive shaft

The driveshaft is the part of the vehicle that connects the wheels. If the driveshaft is damaged, the wheels may stop turning and the vehicle may slow down or stop moving completely. It bears the weight of the car itself as well as the load on the road. So even a slight bend or break in the drive shaft can have dire consequences. Even a piece of loose metal can become a lethal missile if dropped from a vehicle.
If you hear a screeching noise or growl from your vehicle when shifting gears, your driveshaft may be damaged. When this happens, damage to the u-joint and excessive slack in the drive shaft can result. These conditions can further damage the drivetrain, including the front half. You should replace the driveshaft as soon as you notice any symptoms. After replacing the driveshaft, you can start looking for signs of wear.
A knocking sound is a sign of damage to the drive shaft. If you hear this sound while driving, it may be due to worn couplings, damaged propshaft bearings, or damaged U-joints. In some cases, the knocking noise can even be caused by a damaged U-joint. When this happens, you may need to replace the entire driveshaft, requiring a new one.

Maintenance fees

The cost of repairing a driveshaft varies widely, depending on the type and cause of the problem. A new driveshaft costs between $300 and $1,300, including labor. Repairing a damaged driveshaft can cost anywhere from $200 to $300, depending on the time required and the type of parts required. Symptoms of a damaged driveshaft include unresponsiveness, vibration, chassis noise and a stationary car.
The first thing to consider when estimating the cost of repairing a driveshaft is the type of vehicle you have. Some vehicles have more than one, and the parts used to make them may not be compatible with other cars. Even if the same car has 2 driveshafts, the damaged ones will cost more. Fortunately, many auto repair shops offer free quotes to repair damaged driveshafts, but be aware that such work can be complicated and expensive.

China high quality Rch Series Single Acting Hydraulic Lifting Cylinder     with Great qualityChina high quality Rch Series Single Acting Hydraulic Lifting Cylinder     with Great quality