China best Overdrive Gear of Automobile Gear-Box Countershaft helical bevel gear

Product Description

Overdrive Gear of Automobile Gear-box Countershaft

Why choose us?
1. HangZhou Xihu (West Lake) Dis.hua Chain Group Co., Ltd. Established in 1991, we have 5 subsidiaries in china and have 6 subsidiaries abroad; HangZhou Xihu (West Lake) Dis.hua Gear Co., Ltd is 1 of the subsidiaries of it.
2. We specialized in producing all kinds of standard chains and special chains, cylinder gear, standard & non-standard sprocket and gearbox for middle & light type vehicle and tractor.
3. We have obtained ISO9001, ISO14001, ISO16969, AAA and API certificates.
4. Our partners among world top enterprises, such as JOHNDEERE, NEW HOLLAND, CLAAS, HONDA, KUBOTA, YANMAR, etc.

Technique parameter
Module: 2.0 to 5.0;
Teeth Number: 20 to 60;
Pressure Angle: 20° To 30° ;
O. D: 45 to 318;
L(max): 60

Enterprice Introduction
HangZhou Xihu (West Lake) Dis.hua Gear Co., Ltd. A wholly owned subsidiary of HangZhou Xihu (West Lake) Dis.hua Chain Group Co., Ltd. Is the professional manufacturer of cylinder gear, standard & non standard sprocket and gearbox for middle & light type vehicle and tractor.

The enterprise possesses more than 500 sets of advanced equipments for hobbing, shaping, shaving, grinding and testing, and imported UNIC carburizing automatically lines for heat treatment. Our annual outputs of gears, shafts and sprockets are 4 million pieces and gearboxes are 50, 000 sets. The main products are engine gear, gearbox gear, tractor gear and power transmission sprocket, which widely used in middle & light type trucks, agricultural vehicle, tractors and engineering machinery etc.

Our products “Feiyu Gears” gain “The Famous Brand of ZheJiang Province” and in 2004 we were awarded the “State level Unit of Valuing Contracts and Keeping on Credit” by State Administration of Industry and Commerce.
High quality, best service, reasonable price, we are willing to cooperate with all the customers and develop together.

Application: Motorcycle, Machinery
Manufacturing Method: Cast Gear
Toothed Portion Shape: Spur Gear
Type: Circular Gear
Pressure Angle: 20° to 30°
L: 60


Customized Request

automobile gear

What are the advantages and disadvantages of automatic and manual transmissions?

Automatic and manual transmissions each have their own set of advantages and disadvantages. Here’s a detailed explanation:

Automatic Transmissions:


  • Ease of Use: Automatic transmissions are easier to operate since they do not require the driver to manually engage gears. This makes them more convenient, especially in heavy traffic or during long commutes.
  • Smooth Shifting: Automatic transmissions provide smooth and seamless gear shifts, as the shifting process is controlled by the vehicle’s computer system. This results in a comfortable driving experience.
  • Improved Fuel Efficiency: Modern automatic transmissions often feature advanced technologies such as continuously variable transmissions (CVT) or dual-clutch transmissions (DCT), which can optimize fuel efficiency by selecting the most appropriate gear ratio for the driving conditions.
  • Reduced Driver Fatigue: With automatic transmissions, drivers can focus more on the road and other aspects of driving, as they don’t need to manually shift gears. This can reduce driver fatigue, especially during long journeys.


  • Higher Cost: Automatic transmissions tend to be more expensive to manufacture and repair compared to manual transmissions, which can result in higher vehicle purchase prices and maintenance costs.
  • Less Control: Some driving enthusiasts prefer manual transmissions because they offer more control over gear selection, allowing for a more engaging driving experience. Automatic transmissions, on the other hand, limit the driver’s ability to choose specific gear ratios.
  • Lower Power Transfer Efficiency: Automatic transmissions can have slightly lower power transfer efficiency compared to manual transmissions, which means that some engine power is lost during the transmission of power from the engine to the wheels.

Manual Transmissions:


  • Greater Control: Manual transmissions provide the driver with full control over gear selection, allowing for precise shifts and the ability to match engine RPM to driving conditions. This control can enhance the driving experience, especially for those who enjoy a more engaged and sporty driving style.
  • Improved Power Transfer Efficiency: Manual transmissions generally have higher power transfer efficiency compared to automatic transmissions. This means that a greater percentage of engine power reaches the wheels, resulting in better acceleration and responsiveness.
  • Lower Maintenance Costs: Manual transmissions are typically less complex and have fewer components compared to automatic transmissions. Consequently, they often require less maintenance and can be more cost-effective to repair.


  • Requires Skill: Operating a manual transmission requires learning how to engage gears, coordinate clutch and throttle control, and shift smoothly. This can be challenging for drivers who are not accustomed to manual transmissions or prefer a more relaxed driving experience.
  • Increased Physical Effort: Maneuvering a clutch pedal in stop-and-go traffic or during long drives can be physically tiring, especially in situations that require frequent gear changes.
  • Steeper Learning Curve: Learning to drive a manual transmission vehicle effectively takes time and practice. It requires developing a feel for the clutch engagement point and mastering the coordination between the clutch, gear lever, and accelerator pedal.

Ultimately, the choice between automatic and manual transmissions depends on personal preference, driving conditions, and driving style. Automatic transmissions offer convenience and ease of use, while manual transmissions provide greater control and a more engaging driving experience.

automobile gear

What is a continuously variable transmission (CVT) and how does it work in cars?

A continuously variable transmission (CVT) is a type of automatic transmission that provides an infinite number of gear ratios within a specific range. Here’s a detailed explanation of how it works:

In a traditional transmission, gears of different sizes are used to achieve different gear ratios. These gears have fixed ratios, and the transmission shifts between them to adjust the speed and torque output. In contrast, a CVT uses a different mechanism to vary the gear ratios.

1. Pulleys and Belt/Chain System:

A CVT consists of two pulleys connected by a metal belt or a chain. Each pulley has two halves that can move closer together or farther apart. One pulley is connected to the engine, and the other is connected to the wheels.

2. Variable Pulley Diameter:

The pulleys in a CVT have variable diameters. As the pulley halves move closer together, the effective diameter decreases, and as they move farther apart, the effective diameter increases. This adjustment of the pulley diameters allows for continuous variation of the gear ratio.

3. Belt/Chain Movement:

The metal belt or chain runs between the two pulleys. When the effective diameter of one pulley decreases, the belt or chain moves towards the larger diameter on the other pulley. As a result, the contact point on the pulleys changes, altering the effective gear ratio.

4. Hydraulic or Electronic Control:

To control the movement of the pulleys, a CVT uses a hydraulic or electronic control system. This system monitors various factors, such as vehicle speed, engine load, throttle input, and acceleration demands, to determine the optimal gear ratio. It then adjusts the position of the pulley halves accordingly.

5. Seamless Gear Ratio Changes:

Due to the continuous variation of the pulley diameters, a CVT provides seamless gear ratio changes. It can continuously adjust the gear ratio to keep the engine operating at its most efficient RPM for a given driving condition. This flexibility allows the engine to deliver power more effectively and improves fuel efficiency.

6. “Step” or “Shift” Modes:

Some CVTs offer “step” or “shift” modes to simulate traditional gear shifting. In these modes, the CVT may have predefined ratios or “virtual” gears that mimic the feel of gear changes. This can provide a more familiar driving experience for those accustomed to traditional automatic transmissions.

CVTs are known for their smoothness and fuel efficiency. By continuously adjusting the gear ratio to match the engine’s power output and the driving conditions, a CVT helps optimize fuel consumption. They are commonly found in smaller vehicles and hybrid cars.

However, it’s worth noting that CVTs may have a different driving feel compared to traditional transmissions, as the engine RPM can remain relatively constant during acceleration. Some drivers may prefer the stepped gear changes of conventional transmissions for a more engaging driving experience.

“`automobile gear

Can you explain the role of gear ratios in an automobile transmission?

Gear ratios play a crucial role in an automobile transmission. Here’s a detailed explanation:

In an automobile transmission, the gear ratio refers to the ratio of the rotational speed of the engine’s input shaft to the rotational speed of the transmission output shaft, which is connected to the wheels. Different gear ratios are achieved by using gears of varying sizes.

1. Speed and Torque Conversion: The primary function of gear ratios is to convert the engine’s high rotational speed and low torque into lower rotational speed and higher torque at the wheels. Lower gear ratios (such as first or second gear) provide high torque multiplication, which is useful for starting the vehicle or climbing steep hills. Higher gear ratios (such as fifth or sixth gear) allow the engine to operate at lower speeds while maintaining higher vehicle speeds, providing better fuel efficiency and reduced engine wear.

2. Acceleration and Power: By selecting the appropriate gear ratio, the transmission enables the driver to control the vehicle’s acceleration and power delivery. Lower gear ratios provide quick acceleration by multiplying the engine’s torque output. During rapid acceleration, the transmission may stay in lower gears to keep the engine operating within its optimal power band. Higher gear ratios are used for cruising at higher speeds, where less torque is needed to maintain the vehicle’s momentum.

3. Engine Performance: Gear ratios are crucial for optimizing engine performance. Engines have a specific range of speeds called the power band, where they deliver the most power efficiently. By selecting the right gear ratio, the transmission keeps the engine operating within its power band, ensuring optimal performance and responsiveness. This improves the overall driving experience and allows the engine to operate at its most efficient point, resulting in better fuel economy.

4. Load and Terrain Adaptation: Different gear ratios allow the vehicle to adapt to varying loads and terrains. When encountering uphill gradients or carrying heavy loads, lower gear ratios are used to provide the necessary torque for overcoming resistance. Conversely, on flat roads or when the vehicle is lightly loaded, higher gear ratios are utilized to maintain speed while reducing engine RPM and improving fuel efficiency.

5. Gear Shifting: The availability of different gear ratios facilitates gear shifting in manual transmissions. As the vehicle accelerates, the driver can shift to higher gears to reach higher speeds while maintaining optimal engine performance. Similarly, when decelerating or coming to a stop, downshifting to lower gears allows for engine braking and better control of the vehicle.

6. Mechanical Advantage: Gear ratios provide a mechanical advantage by multiplying the engine’s torque output. Lower gear ratios offer higher torque multiplication, enabling the vehicle to overcome resistance and handle demanding tasks. This mechanical advantage is particularly useful during towing, off-road driving, or situations requiring increased traction.

Overall, gear ratios in automobile transmissions enable the engine’s power and torque to be transmitted to the wheels efficiently. They allow for speed and torque conversion, adaptation to different driving conditions, optimization of engine performance, and control over the vehicle’s acceleration and power delivery.

China best Overdrive Gear of Automobile Gear-Box Countershaft helical bevel gearChina best Overdrive Gear of Automobile Gear-Box Countershaft helical bevel gear
editor by CX 2023-10-09