Gearbox
Why Choose Us?
Quality Guaranteed
A modern enterprise specialized in development, design, manufacture, sale and service for agricultural machinery transmission systems, including agricultural pto shaft (driveline), gearbox, and other accessories in complete series.
Rich Experience
Over decades' development and great efforts, Changheng has become one of the biggest manufacturers in the field of Agricultural PTO shaft.
Advanced Equipmen
We've developed our own line of forging, machining, assembly, plastic injection, etc. And we have our own CE testing facilities like Torque, Frozen and UV tester. We also designed our own Square testbay with monitered gearboxes and PTO shafts running over 1000 hours.
Definition of Gearbox
The most basic definition of a gearbox is that it is a contained gear train, or a mechanical unit or component consisting of a series of integrated gears within a housing. In fact, the name itself defines what it is — a box containing gears. In the most basic sense, a gearbox functions like any system of gears; it alters torque and speed between a driving device like a motor and a load.
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![Agricultural Gearbox]()
Agricultural GearboxRead Morespeed Ratio: 1:2.83. Input: 540RPM; 33KW; 45HP; 583NM. Output: 1528RPM; 206NM
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![PTO Gearbox]()
PTO GearboxRead MoreSpeed Ratio: 3:1 ;. Input: 540RPM ; 44KW ; 60HP ; 778NM. Output: 2334NM ; 180RPM
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![Agricultural Machine Gearbox]()
Agricultural Machine GearboxRead MorePlace of Origin: Zhejiang, China. Brand Name: CH. Model Number: GT40U. Gearing
Benefits of Gearbox
Torque multiplication
Gearboxes can increase the torque output of a motor or engine. This is achieved by reducing the rotational speed of the motor or engine and increasing the torque at the output shaft.
Speed reductio
Gearboxes can be used to reduce the speed of a motor or engine. This is useful in applications where high speeds are not necessary, such as in heavy machinery.
Versatility
Gearboxes are versatile and can be used in a wide range of applications. They can be customized to suit specific requirements and can be used in both high and low-power applications.
A car engine spins at high rotation speeds measured in revolutions per minute (RPM), typically up to 6,500rpm or more at maximum output. Unfortunately, an engine's natural RPM range is often unsuitable for practical driving. This is where the gearbox saves the day.
The gearbox houses a series of gears connected to the engine's crankshaft on one side and the car's driveshaft on the other. Gears of varying sizes intermesh to manipulate engine rotation to wheel rotation ratio. Bigger gears slow down the RPMs, while smaller gears increase RPMs.
Shifting between higher and lower gears adapts the engine's power output for different scenarios. Lower gears provide greater torque for activities like pulling away from a standstill or uphill driving. Higher gears allow the wheels to spin faster, using less engine strain for cruising at high speeds. The gearbox keeps the engine in its optimal operating range as conditions change.
Parts of a Gearbox
A earbox comprises several components or parts, although this depends on the type of gearbox in the vehicle (automatic or manual). Nevertheless, here are the primary gearbox components in most vehicles.
Gears
The gears in gearboxes are metallic discs of different sizes with different ridges and number of teeth. They are in all Gearboxes, fixed on the shafts (except the main shaft), and can slide in either direction.
The transmission's gear transmits power from one shaft to the next shaft, leading to the generation of torque depending on its size, number of teeth, and ridges. A large gear will generate high torque, leading to a lesser speed. On the other hand, a small gear will have a lesser torque, leading to a higher speed.
Shafts
Shafts present in Gearboxes are the input shaft, countershafts, and main shafts. The input shaft, also called the driving and clutch shaft, is attached to the engine via the crankshaft and carries the power generated by the car engines
The countershaft connects directly with the clutch shaft and has a gear that connects with both the clutch shaft and main shaft. Furthermore, based on a direct connection with the shaft carrying the generated powers and the gear ratio, it can run at the engine's speed or a lower speed.
Lastly, the main shaft or the primary shaft is connected to the universal shaft at one end and the countershaft at the other. It runs at the vehicle speed and a different speed from the countershaft.
Bearings
This part of a gearbox functions in reducing friction while facilitating rotation. They are present on both the main and countershafts.
Housing
A Gearbox housing is a case that contains all the components of the car component. It is very strong and provides protection and support for the components.
What Is the Purpose of Gearbox?
The Gearbox provides torque and speed conversion because of the internal combustion lamination. It also facilitates the direction changes for the output shaft to reverse. The main purpose of the Gearbox in the car is to decrease the load which is on the engine by controlling the torque and the speed of the vehicle.
Gearbox also has an option to select the different types of gear ratios. Once the engine crosses the speed limit on the first gear, it will advise to increase the gear and reduce the engine's rpm, allowing it to pick the greater speed and acceleration and get better fuel economy.
Most vehicle gearboxes are used to increase the torque and reduce the speed of an output shaft, which generates a mechanical advantage. The automotive Gearbox also has a provisional to apply opposite that it will offer, increasing the speed of shaft output with the torque reduction.
Driving a car requires both speed and traction. Transmission gears help you choose one or the other depending on your driving situation.
The lower gears, 2nd and 1st, provide the best traction, while the higher gears, 5th and 6th (if available) provide the most acceleration. In addition, the number of gears in the gearbox provides an excellent combination of traction and speed.
So, it helps the driver/rider to choose the most suitable combination to increase efficiency. Therefore, it is very important to choose the right gear according to the road conditions and the load. Shorter gears improve acceleration and pickup, while higher gears improve top speed.
Common Gearbox Maintenance Procedures
Oil Change
The lubricating oil in the gearbox degrades over time due to heat and wear. Regular oil changes help maintain proper lubrication, preventing friction and wear on gears and bearings.
Inspection of Seals and Gaskets
Seals and gaskets play a crucial role in preventing oil leakage and keeping contaminants out. Regularly inspect and replace damaged seals and gaskets to maintain the integrity of the gearbox.
Gear Inspection
Check for signs of wear or damage on gears. Abnormalities such as chipped teeth or uneven wear patterns can indicate issues that need addressing before they escalate.
Bearing Maintenance
Bearings support the rotating shafts within the gearbox. Ensure they are properly lubricated and replace any worn-out bearings to prevent excessive friction and potential breakdowns.
Alignment Checks
Misalignment of gearbox components can lead to increased wear and reduced efficiency. Regularly check and correct any misalignments to ensure smooth operation
Why Is a Gearbox Necessary?
A gearbox is required to regulate the power output and the speed range of the engine relative to the range of speeds over which the vehicle is at any given time likely to be required to operate. Only in this way can the torque at the wheels be balanced against demands for either a steady speed uphill or downhill, or on the level, or for acceleration or deceleration. A gearbox is necessary, therefore, so that the driver can regulate torque by selecting the appropriate speed range or, in other words, the vehicle speed at which maximum torque is obtainable.
When a vehicle is moving at a uniform speed, the driving force, or tractive effort, at the wheels must be such as to exactly balance the sum of three categories of variable forces tending to oppose the motion. If it is greater, the car will accelerate, and if it is smaller, it will decelerate until a balance is obtained. Such a balance will be established eventually, because two of the forces vary with speed. The three forces are: aerodynamic, or air, resistance, gradient resistance that can be either positive or negative, and rolling resistance.
Agricultural gearboxes play a vital role in modern agricultural machinery. Agricultural gearboxes are key components for power transmission of agricultural equipment. It can convert and transmit the power of the engine to meet the needs of different agricultural operations and ensure the efficient and stable operation of various agricultural machinery. It has high precision and reliability and can withstand large torque and load. Whether in ploughing, sowing, harvesting and other links, agricultural gearboxes play an irreplaceable role.
In order to ensure the good performance and long life of agricultural gearboxes, daily maintenance is essential. Check the oil level and oil quality of the gearbox regularly, and replace or add suitable lubricating oil in time to reduce wear and friction. At the same time, pay attention to whether the gearbox has abnormal sound or vibration. If there is any abnormality, the cause should be promptly investigated and repaired. During use, it is necessary to operate in accordance with the prescribed operating procedures to avoid overload and unreasonable use. Clean the gearbox regularly to prevent impurities and dust from entering the interior and affecting its normal operation.
Agricultural gearboxes are an important support for agricultural production. We need to attach importance to its role and do a good job of maintenance so that it can better serve agricultural development and contribute to the modernization of agriculture.
Gearbox Selection Steps
1.Identify Output Style: Determine if you need the input shaft and output shaft to be parallel, co-linear, at different angles, and/or on different planes. Also, decide if you need a sprocket, toothed pinion, pulley, or other items on the output shaft. Most of these items create a high radial load.
2.Consider Shaft:Hollow Bore Size and Features Options might include keying, splining, shear pinning, tapering, static grounding, etc.
3.Determine Load Type: Non-uniform loads and high-shock loads often require a higher service factor because they increase wear on gears and bearings.
4.Determine Load Values: Calculate the axial (thrust) loads and radial (overhung) loads that will be acting on the output shaft of the gearbox and check the gearbox manufacturer's catalog to find one that can withstand them.
5.Analyze Gearbox Mounting Needs: Most gearbox manufacturers offer a range of mounting configurations. Some of the most common mounting options include mounting feet for either above or below the body of the gearbox, hollow outputs, and many different input and output configurations. Housing styles may limit how a unit is mounted, so custom frames or brackets may be needed.
6.Define the Service Factor: The service factor is defined by the AGMA (American Gear Manufacturers Association) as the ratio between a specific gearbox's rated horsepower and the horsepower demanded by the application.
It is based on the conditions of the application, the type of gearbox, and the expected hours of operation per day.
7.Evaluate Temperature and Environment: This will determine if special sealing materials and corrosion-resistant materials are needed, and it will help determine lubrication requirements.
8.Other Considerations: Sometimes manufacturers must ship the gearbox without lubricant due to regulations about the transportation of hazardous materials, and some manufacturers may offer to integrate a motor onto the gearbox and ship the assembly as a single unit.
Our Factory
Founded in 1995, Zhejiang Changheng Machinery Group Co., Ltd is now a modern enterprise specialized in development, design, manufacture, sale and service for agricultural machinery transmission systems, including agricultural pto shaft (driveline), gearbox, and other accessories in complete series.
● We've developed our own line of forging, machining, assembly, plastic injection, etc.
● We have our own CE testing facilities like Torque, Frozen and UV tester.
● We also designed our own Square testbay with monitered gearboxes and PTO shafts running over 1000 hours.
Our Certificate
Ultimate FAQ Guide to Gearbox
Q: What is a gearbox?
Q: How do gearbox work?
Q: Where are gearboxes used?
Q: What is the benefit of a gearbox?
Q: What features does gearbox have?
Q: What maintenance plans does gearbox have?
Q: Need to keep gearbox clean?
Q: How to service a gearbox?
Drain gearbox fluid.
Inspect the fluid for evidence of sludge.
Fill the gearbox to the recommended level with new fluid of the correct type and viscosity*
Inspect fit of plug and drain plug.
Check for leaks and wear on seals.
Check shift lever bushes.
Check clutch operation.
Q: What is the maintenance of a gearbox?
Q: How to size and select gearboxes?
Required output torque (or speed), along with RPM and shaft rotation.
Available space.
Configuration (2-way, 3-way, or 4-way).
Bore centerline measurement.
Gear ratio.
Rotation configuration.
Q: What are the criteria for gearbox selection?
Q: How do you choose the right gearbox?
Q: How many km does a gearbox last?
Q: How do you maintain a gearbox?
Q: What is the standard maintenance procedure for gearbox?
Monitor the Temperature of the Gearbox.
Lubricate the Gearbox Regularly.
Check the Gearbox for Dirt and Dust.
Q: How much does it cost to service gearbox?
Q: How do you inspect a gearbox?
Q: What are the best methods for gearbox lubrication?
Q: How often should you do gearbox oil?
Q: How often does a gearbox need servicing?
Q: What is the standard maintenance procedure for a gearbox?
Oil Level and Quality: Check the oil level in the gearbox as per the manufacturer's recommendations.
We're well-known as one of the leading gearbox manufacturers and suppliers in China. If you're going to wholesale customized gearbox with competitive price, welcome to get quotation from our factory.
gearbox for agricultural machinery, 1000 rpm to 540 rpm gearbox, 540 pto right angle gearbox