Product Description

Product Description

Do you want 1 tractor to finish many works including rotary tillage, plowing, ditching, 
guttering,trenching, filling, hoeing, ridging? Do you want your tractor to dig as aexcavator?  
One crawler tractor is enough!  

Rotarty tillage
Trenching, guttering,ditching 
Earth moving
Fertilization and others 
All above farming works finished by 1 tractor!!!

The crawler tractor could finish the above works for you. At the front and back end,you
can equipe all the agrculture tools to process your land. Meanwhile the crawlercould move
freely on paddy land and dry land. All terrain could be taken. It could climb the hill and
cross the horrows as it is anti slope. 


1. Brand Diesel Engines are taken such as Weichai Engine, CZPT Engine. 
2. Widened and longer chassis so stablity 
3. 8-10 Gears, 4 forward and 1 reverse, reponse promptly. 
4. 3 Points suspension and 4 wheelers could be connected. 
5. Top quality of Highlight headlights and turn signals.  


Detailed Photos

The tractor could work as ditcher. It will offer required gutttering or trenching for you.
The control is remote. Once you have set the route, the tractor could run on its own and
you just monitor the process. It also could offer rotary tillage, plowing, filling, CZPT and
hoeing. it could move earth for you too. As long as you add different agriculture tools, it
will work as you want. So it is multi porpose tractor. 


We have been certified by CE, ISO AND EPA by top quality and stable performance.
Meantime we have been rewarded with many Chinese honors and certificates books.
So our machines are durable in quality, stable in performance. We wish to offer
wider distribution. 

Packaging & Shipping

All tracters will be packaged into wooden boxes for exportion. The tractor box will be fastened. 

Company Profile

ZheJiang CZPT Heavy Industry Group Co., Ltd. is specialized in R&D and production of
lawnmowers, crawler tractors, loaders, excavators and forklift truck. Its location is HangZhou city,
ZheJiang ,China. We have got European CE certification and ISO9001:2015. We will direct
you by the freeonline video technical guidance and offer a one-year warranty. Although our
internationaltrade started in 2571, our machines have been exported to over 10 countries,
such as the United States,Italy,Germany, Czech, Romania, Laos, Pakistan and so on.We
could offer OEM and ODM service to you. You are welcome to witness the production process 
in our factory.


1 Are you factory or trading company?
We are factory which produces lawn mowers and many construction machines such as
loaders,excavators, wheel tractors, forklift and and others.

2 What’s your company advantages?
As the leader of lawn mowers and construction machines , we have exported to European
market,familiar with lawn mowers and construction machines and can recommend to clients
right products.

3 Can we buy 1 sample?
Yes, 1 sample order is welcome. However, we need to add sample fee to the price and
will return it back to you after receiving your large order in future.

4 What’s your delivery time?
5 days for sample, 7-10 days for large order.

5 How do you control your quality?
To guarantee high quality and efficient management, our whole manufacturing processes
are under a very serious and strict system. All of our products are 100% inspected before

6 What’s your product warranty?
The warranty time of the machine is 1 year.

7 If I need different measurements or weight, could you offer OEM service?
Sure, we can provide OEM and ODM service.

Model  25HP Crawler Tractor 
General Size  2650*900*1150mm
Total weight 700KG
Diesel engine  Changfa Engine
Engine speed 2200 r
Diesel Cost  6-12 liter/acre
Traveling speed 20Km/h
Working speed 3-6 hours per acre
Gear Box 8 gears,4 forwards, 1 reverse
Crawler width 180mm
Functions  Rotarty tillage, plowing, filling, trenching, guttering, hoeing, earth moving,digging, ridging, fertilization and others 
Model  25HP Crawler Tractor 
General Size  2650*900*1150mm
Total weight 700KG
Diesel engine  Changfa Engine
Engine speed 2200 r
Diesel Cost  6-12 liter/acre
Traveling speed 20Km/h
Working speed 3-6 hours per acre
Gear Box 8 gears,4 forwards, 1 reverse
Crawler width 180mm
Functions  Rotarty tillage, plowing, filling, trenching, guttering, hoeing, earth moving,digging, ridging, fertilization and others 

Applications of Spline Couplings

A spline coupling is a highly effective means of connecting two or more components. These types of couplings are very efficient, as they combine linear motion with rotation, and their efficiency makes them a desirable choice in numerous applications. Read on to learn more about the main characteristics and applications of spline couplings. You will also be able to determine the predicted operation and wear. You can easily design your own couplings by following the steps outlined below.

Optimal design

The spline coupling plays an important role in transmitting torque. It consists of a hub and a shaft with splines that are in surface contact without relative motion. Because they are connected, their angular velocity is the same. The splines can be designed with any profile that minimizes friction. Because they are in contact with each other, the load is not evenly distributed, concentrating on a small area, which can deform the hub surface.
Optimal spline coupling design takes into account several factors, including weight, material characteristics, and performance requirements. In the aeronautics industry, weight is an important design factor. S.A.E. and ANSI tables do not account for weight when calculating the performance requirements of spline couplings. Another critical factor is space. Spline couplings may need to fit in tight spaces, or they may be subject to other configuration constraints.
Optimal design of spline couplers may be characterized by an odd number of teeth. However, this is not always the case. If the external spline’s outer diameter exceeds a certain threshold, the optimal spline coupling model may not be an optimal choice for this application. To optimize a spline coupling for a specific application, the user may need to consider the sizing method that is most appropriate for their application.
Once a design is generated, the next step is to test the resulting spline coupling. The system must check for any design constraints and validate that it can be produced using modern manufacturing techniques. The resulting spline coupling model is then exported to an optimisation tool for further analysis. The method enables a designer to easily manipulate the design of a spline coupling and reduce its weight.
The spline coupling model 20 includes the major structural features of a spline coupling. A product model software program 10 stores default values for each of the spline coupling’s specifications. The resulting spline model is then calculated in accordance with the algorithm used in the present invention. The software allows the designer to enter the spline coupling’s radii, thickness, and orientation.


An important aspect of aero-engine splines is the load distribution among the teeth. The researchers have performed experimental tests and have analyzed the effect of lubrication conditions on the coupling behavior. Then, they devised a theoretical model using a Ruiz parameter to simulate the actual working conditions of spline couplings. This model explains the wear damage caused by the spline couplings by considering the influence of friction, misalignment, and other conditions that are relevant to the splines’ performance.
In order to design a spline coupling, the user first inputs the design criteria for sizing load carrying sections, including the external spline 40 of the spline coupling model 30. Then, the user specifies torque margin performance requirement specifications, such as the yield limit, plastic buckling, and creep buckling. The software program then automatically calculates the size and configuration of the load carrying sections and the shaft. These specifications are then entered into the model software program 10 as specification values.
Various spline coupling configuration specifications are input on the GUI screen 80. The software program 10 then generates a spline coupling model by storing default values for the various specifications. The user then can manipulate the spline coupling model by modifying its various specifications. The final result will be a computer-aided design that enables designers to optimize spline couplings based on their performance and design specifications.
The spline coupling model software program continually evaluates the validity of spline coupling models for a particular application. For example, if a user enters a data value signal corresponding to a parameter signal, the software compares the value of the signal entered to the corresponding value in the knowledge base. If the values are outside the specifications, a warning message is displayed. Once this comparison is completed, the spline coupling model software program outputs a report with the results.
Various spline coupling design factors include weight, material properties, and performance requirements. Weight is one of the most important design factors, particularly in the aeronautics field. ANSI and S.A.E. tables do not consider these factors when calculating the load characteristics of spline couplings. Other design requirements may also restrict the configuration of a spline coupling.


Spline couplings are a type of mechanical joint that connects two rotating shafts. Its two parts engage teeth that transfer load. Although splines are commonly over-dimensioned, they are still prone to fatigue and static behavior. These properties also make them prone to wear and tear. Therefore, proper design and selection are vital to minimize wear and tear on splines. There are many applications of spline couplings.
A key design is based on the size of the shaft being joined. This allows for the proper spacing of the keys. A novel method of hobbing allows for the formation of tapered bases without interference, and the root of the keys is concentric with the axis. These features enable for high production rates. Various applications of spline couplings can be found in various industries. To learn more, read on.
FE based methodology can predict the wear rate of spline couplings by including the evolution of the coefficient of friction. This method can predict fretting wear from simple round-on-flat geometry, and has been calibrated with experimental data. The predicted wear rate is reasonable compared to the experimental data. Friction evolution in spline couplings depends on the spline geometry. It is also crucial to consider the lubrication condition of the splines.
Using a spline coupling reduces backlash and ensures proper alignment of mated components. The shaft’s splined tooth form transfers rotation from the splined shaft to the internal splined member, which may be a gear or other rotary device. A spline coupling’s root strength and torque requirements determine the type of spline coupling that should be used.
The spline root is usually flat and has a crown on one side. The crowned spline has a symmetrical crown at the centerline of the face-width of the spline. As the spline length decreases toward the ends, the teeth are becoming thinner. The tooth diameter is measured in pitch. This means that the male spline has a flat root and a crowned spline.


Spindle couplings are used in rotating machinery to connect two shafts. They are composed of two parts with teeth that engage each other and transfer load. Spline couplings are commonly over-dimensioned and are prone to static and fatigue behavior. Wear phenomena are also a common problem with splines. To address these issues, it is essential to understand the behavior and predictability of these couplings.
Dynamic behavior of spline-rotor couplings is often unclear, particularly if the system is not integrated with the rotor. For example, when a misalignment is not present, the main response frequency is one X-rotating speed. As the misalignment increases, the system starts to vibrate in complex ways. Furthermore, as the shaft orbits depart from the origin, the magnitudes of all the frequencies increase. Thus, research results are useful in determining proper design and troubleshooting of rotor systems.
The model of misaligned spline couplings can be obtained by analyzing the stress-compression relationships between two spline pairs. The meshing force model of splines is a function of the system mass, transmitting torque, and dynamic vibration displacement. This model holds when the dynamic vibration displacement is small. Besides, the CZPT stepping integration method is stable and has high efficiency.
The slip distributions are a function of the state of lubrication, coefficient of friction, and loading cycles. The predicted wear depths are well within the range of measured values. These predictions are based on the slip distributions. The methodology predicts increased wear under lightly lubricated conditions, but not under added lubrication. The lubrication condition and coefficient of friction are the key factors determining the wear behavior of splines.