Product Description

SUNYO / Chinese High Quality/  WZ30-25 Backhoe Loader  with Famous Brand Engine and Transmission. Widely used, flexible operation

The Backhoe Loader WZ30-25:
   WZ30-25 Backhoe loader, with CZPT  YC4A105Z-T20 engine , power is100hp, chinese axle and Trans. With A/C, pilot control, Reversing video, hammer pipe ,                                                             WZ30-25 Backhoe loader Operating weight7600kg, front bucket 1.2 m3, rated loading is 2.5tons. Rear CZPT bucket is 0.3 m3,                                     
  It can  use for loading and digging, 1 machine has 2 functions. can help you to save much more cost. and can do many kinds work for building road, and so on.                                                                      
 It will bring you higher economic efficiency, Better profit income.

Main Performance Parameter of WZ30-25:

Overall Operating Weight	7640KG
Transport Dimension
mm L*W*H	6170×2268×3760
Wheel base	2370mm
Min. Ground Clearance	300mm
Bucket Capacity	1.0m3
Breakout Force	38KN
Loading Lifting Capacity	2500KG
Bucket Dumping Height	2770mm
Bucket Dumping Distance	925mm
Digging Depth	27mm
Backhoe Capacity	0.3m3
Max. CZPT Depth	4082mm
Swing Angle of Excavator Grab	190o
Max. Pulling Force	39KN
Engine
Model	YUCHAI  YC4A105Z-T20
Type	In Line Direct injection Four-Stroke and Injection Combustion Chamber
Cylinder-Inside Diameter*Stroke	4-108×132
Rated Power	75KW
Rated Speed	2200r/min
Min. Fuel Consumption	≤230g/km.h
Max.Torque	≥400N.M/1500r/min
Displacement	4.8L
Steering System
Model of Steering Device	BZZ5-250
Steering Angle	±36 o
Min. turning radius	5018mm
Pressure of the system	14Mpa
Axle
Manufacturer	HangZhou Axle Factory
Main Transmission Type	Double Reduction
Final Reducer	Single Stage Final Reducer
Rated Loader of Axle	8.5t
Transmission System
Torque Converter
Model	YJ280
Type	Single-stage Three Elements
Max. Efficiency	84.40%
Inlet Pressure	1.3Mpa-1.5 Mpa
Outlet Pressure	0.25Mpa-0.3 Mpa
Cooling Method	Oil-cooling Pressure Circulation
Gearbox
Type	Fixed Shaft Power Transmission
Oil Pressure of Clutch	1373Kpa-1569 Kpa
Gears	Two Gears Ahead, Two Gears Astern
Max.Speed	22Km/h
Tyre
Model	16/70-20
Pressure of Front wheel	0.22 Mpa
Pressure of Back Wheel	0.22 Mpa
Brake System
Service Brake	Air Over Oil Caliper Brake
	External Type
	Self-regulation
	Self-balance
Emergency Brake	Operation Power Implementing brake Manual Operation Power Terminating Brake
Hydraulic System
Digging Power of Excavator Grab	46.5KN
Digging Power of Dipper	31KN
Bucket Lifting Time	5.4S
Bucket Lowering Time	3.1S
Bucket Discharge Time	2.0S

Backhoe Loader:
the backhoe loader also called a loader backhoe,is a heavy equipment vehicle that consists of a tractor fitted with a bucket on the front and a backhoe on the back. Due to its small size and versatility, backhoe loaders are very common in urban engineering and small construction projects (such as building a small house, fixing urban roads, etc.) as well as developing countries. This type of machine is similar to and derived from what is now known as a TLB (Tractor-Loader-Backhoe), which is to say, an agricultural tractor fitted with a front loader and rear backhoe attachment.

Packing & Shipping:
We have been engaged in foreign trade for more than 18 years and have very rich experience in shipping. According to the past situation, each of our products is complete and delivered to customers as planned.
Generally, For the WZ30-25 Backhoe loader , one set need 1 40H conainer, or 2 sets load into 1 40H container and 1 20 container.  it also can load in the bulk ship, or Ro-on/Ro-off ship. it according your requirements

Attachments:
Our backhoe loader can be with some more attachements excapt the standard bucket. for exmple the 4 in 1 bucket, Quick Change, Fork, Auger, Hamer, Grass Grab, Wooden Fork, Snow blade, sweaper, Rops And so on. 

Our Service :
Pre-sale service:
To our customers, before you buy the equipments, we hope to understand your needs, according to your machine requirements and your budget; choose the right model for you, to ensure that you buy high-quality products at a lower price.
At the same time, you are welcome to visit our factory in HangZhou, China; we will book hotels, air tickets and take you up from air port.

After-sale service:
After the sale, we will properly arrange the transportation of the machine to ensure that the goods are safely delivered to your hands.
At the same time, we will provide you with technical support 24 hours a day, or send engineers to CZPT the installation and operation. If there are any quality problems with the machine, we will solve it for you in the first time.

Factory View:

Here show some factory pictures to help you understand our company.

Exhibition:
Here show you some exhibition pictures . 

Certificate :

 

FAQ:
Q1: Which country do you export to?
Asia: Pakistan, Philippines, Thailand, Myanmar, Vietnam, Bangladesh, Kazakhstan, Turkmenistan, etc.
Middle East: Iran, UAE, Jordan, Oman, Saudi Arabia, Syria, etc.
Europe: Poland, Russia, Ukraine, Belarus, Bulgaria, etc.
Africa: South Africa,Kenya,Congo,Ethiopia,Nigeria,Ghana,Algeria,Senegal,Tunisia,etc.
South America: Paraguay, Colombia, Brazil, Peru, Chile, Cuba, Venezuela, etc.
Oceania: Australia, etc.

Q2: What is the proportion of your products export?
90% of our products are exported to all over the world.

Q3: What is the payment term?
We can discuss with you. Consider for long-term customers we are favorable payment terms TT, L/C, west union. It depends on the cooperation time, country and contract value.

Q4: What kind of logistic service do you supply?
FOB, CIF, C&F

Q5: What spare parts can you supply?
All kinds of spare parts of SUNYO JCM, SDLG, SHACMAN,  SHXIHU (WEST LAKE) DIS.I, YTO,  etc.
 

Screw Shaft Types

If you’re looking for a screw shaft, but aren’t sure which type to buy, you’re in luck. In this article, we’ll talk about the different types, including Threaded shank, Round head, and Machined. Once you’ve read it, you’ll know which type to buy. Then, you can decide whether you want a ball screw nut or a threaded shank.

Machined screw shafts

Besides the standard stainless steel shaft, manufacturers also provide a variety of other materials, such as titanium, bronze, and brass. In addition to stainless steel, manufacturers also provide a variety of top-coating options, including zinc, brass, and chromium. Aluminum screws are not particularly durable and are easily affected by weather. Most screw shafts feature self-locking mechanisms. They are especially useful in C-clamps, vises, and screw-top container lids.
For applications where accuracy is vital, a ball screw shaft needs to be annealed. A heat treatment can be performed on the ball screw shaft to ensure that both ends are heated evenly. In this process, the shaft will be more durable, while maintaining its high-precision properties. These screw shafts are a key component in computer-controlled motion-control systems, wire bonding, and other industries that require high-precision and high-quality performance.
Depending on the material used, screw shafts can be made of stainless steel or titanium. High-precision CNC machines and lathes are typically used to manufacture screw shafts. Various shapes and sizes are available, each with a specific application. Whether you need a small or large screw, you can find 1 to fit your needs. And since each size requires a different material, your choice of material is important as well.
In general, the materials used for machining screw shafts are steel, stainless steel, titanium, brass, bronze, and aluminum. Metals that resist corrosion are also commonly used. Other materials for screw shafts are Teflon, nylon, and nylon. You can also find threaded screw shafts in materials such as porcelain, glass, and ceramic. If you want to use your screws in a unique material, consider purchasing a customized one.

Ball screw nuts

If you have a screw shaft, the last thing you want to worry about is the ball nut slipping off. To prevent this, you can place a temporary stop in the shaft’s grooves to ensure that the ball nut does not slide off. When you remove the stop, you can then install the ball screw nut. But, before you can install the ball screw nut, you have to make sure that you have a good grip on the shaft.
When selecting ball screw nuts, it’s important to consider how much preload you need to apply to avoid excessive backlash. Preloading eliminates this problem by making the ball nut compact. It also prevents backlash, which is lost motion caused by clearance between the ball and nut. Backlash disrupts repeatability and accuracy. This is where spacer preloading comes in. You can insert a spacer between the 2 ball nuts to transmit the force to the nut. However, you should keep in mind that this method reduces the load capacity of the ball screw.
The critical speed of a screw is the maximum rotating speed before it whips. This critical speed is influenced by several factors, including the diameter of the screw shaft, the number of support elements, and the material. By adjusting these factors, you can reduce the number of components used and the amount of time it takes to assemble the screw shaft. In addition, you can also reduce the number of components and avoid stacking tolerances. However, the critical speed of plastic nuts is limited due to sliding friction.
The ball screw nut has several characteristics that make it unique. Its most prominent feature is the presence of ball bearings. These balls help reduce friction between the screw nut and the shaft. Without ball bearings, the friction would be too high to function properly. Another important characteristic is the groove profile of the nut and ball. These 2 features ensure that the ball and the nut meet at 2 points. You’ll be amazed by the results of the work of these ball screw nuts.

Threaded shank

Wood screws are usually not fully threaded because the shank has an unthreaded portion at the top. This shoulder part forces the screw to compress 2 pieces of wood, which prevents the screw from overheating and compromising the materials strength. As the screw is threaded partially up, it is not as difficult to remove as a fully threaded screw. However, it is important to note that a wood screw will not hold as tightly as 1 with a fully threaded shank.
In addition to being universal, screw threads can be of different sizes. For example, a M8 screw has a thread pitch of 1.25 mm. To avoid confusion, screw thread pitches are commonly given with a multiplication sign. For example, M8x1 means that the screw is 8 mm in diameter but has a thread pitch of 1 mm per 360-degree rotation. Those who are not familiar with these dimensions may find it confusing.
The OD of the threaded portion of a bolt is generally smaller than the OD of the nut. If the shank is too deep for the nut to fit, the threads may bottom out. This is why it’s important to use a thread-cutting bit with a small thread diameter. You can use a micrometer or caliper to measure the thread diameter. This tool will also allow you to easily identify which screw size fits where and how well.
The metric system is the most widely used. Fasteners with DIN numbers are generally metric in size. This makes them very useful for industrial settings. You can find metric-sized screws anywhere, as long as you buy them from a reputable manufacturer. These fasteners also come with a dog point, which is used for safety wire. If the screw needs to be replaced, the shank can be drilled with a hole for a safety wire or for a dog-point.

Round head

A round head screw is the most common type used for machine screws. Other common types include truss head, flat head, and hexed head. Each has a different profile and are used for different purposes. A round head screw is typically wider than a flat or a hexed head, and has a slightly rounded surface. These screws are useful for projects involving sheet metal or sheet-metal parts. Round heads are usually slightly wider than a hex head screw, and they may also be used as a substitute for washers in certain applications. However, truss heads are not necessary for every project.
A wood screw has a smooth shank that protrudes above the surface of the material it is attaching. A metal screw has a threaded shaft that is fully threaded from head to point, and a fully threaded shaft provides more bite. Two common head styles are round head and pan head. If the task requires the screw to be flush or countersunk, the round head will be the best choice.
Another type is the Reed & Prince screw drive. These are similar to Phillips screws but have a 75-degree V shape. They are commonly used in marine hardware and are also known as BNAE NFL22-070. This type is also used for steel plate hangers. In addition to round head and pan head screws, there are a variety of other screw types. You can even get a head with a slotted head if you know where to look.
Screw diameters are specified according to the ISO 261 or ISO 262 standards. An M8 screw has a diameter of 8.25 mm. The M8 screw has a pitch of 1.25 mm, which is equivalent to 1 mm per 360 degrees. There are several other standard screw sizes and thread diameters available. You can find them all by consulting the relevant standards. But remember, the metric system is the most popular.

Self-locking mechanism

A self-locking mechanism for a screw shaft is a device that secures the screw to its supporting member in a failure position. The locking mechanism provides a positive connection between the screw shaft and the control surface during normal operation, and locks the screw to its supporting member when the screw fails. Previous attempts to solve this problem have typically used secondary nuts with free play on the screw, which were intentionally designed to jam when loaded. However, such a device can be unreliable, which is why the present invention offers a more robust and reliable locking mechanism.
The self-locking function of a screw depends on several factors, including its pitch angle and the coefficient of friction of the threads. The angle of friction must be less than the tangent of the material pairing to prevent untightening of the screw. Screws with self-locking mechanisms have an efficiency e lower than 50%, which is less than half. Self-locking screws also have the benefit of being less efficient than a standard screw.
Unlike a normal screw, a self-locking screw can be turned in either direction. The nut 22 rotates with the screw shaft, and the member 23 is translated in an axial direction. Regardless of the direction of the rotation of the screw, this axial translation will result in the opposite moment to that input moment. While screw self-locking mechanisms are typically less expensive, they are more reliable and durable.
Another important feature of self-locking screws is that they are not susceptible to independent loosening. The screw cannot rotate without a certain amount of torque. In addition, a self-locking screw shaft must have a small wedge with a smaller half-angle than the arctangent of the static friction. This means that the torque applied by the driver must be greater than the torque needed to overcome the friction.