China factory Truck Spare Parts Axle Differential Half Shaft Side Gear for Sinotruk-HOWO 199012320009 gear ratio calculator

Product Description


Sinotruk HOWO/Steyr Truck Spare Parts Axle Differential Half Shaft Side Gear


(1) Accessory products of the truck, use 20CrMmti material.
(2) Heat treatment and tempering, high gear root strength, stronger impact resistance.
(3) Multi-purpose CHINAMFG carburizing processing, fine grinding processing technology, effectively reducing noise.
(4) Test product 1 by one, and inspect each product on delivery to ensure 100% quality stability of the product.
(5) The unified brand carton, inner bag and integral foam packaging, which is strong and beautiful.
(6) Passed ISO/TS16949:2009 quality management system certification.
(7) Passed ISO/IEC17571:2005 certification.
(8) Certified by National Laboratory Accreditation Committee.
(9) “100 Auto Parts Suppliers” in China.
(10) China Machinery Top 500.
(11) National first-class measurement enterprise.
(12) National first-class physical and chemical enterprise.

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Truck Model Sinotruk, Shacman, Saic Xihu (West Lake) Dis.n, Foton Auman, FAW Xihu (West Lake) Dis., Xihu (West Lake) Dis.feng, European & Japanese Truck Series, North BENZ( BEIBEN), JAC, etc.
Product catalogue Axle Wheel Assembly
Differential Assembly
Main Reducer Assembly
Inner Ring Gear& Bracket
Basin Angle Gear/ Bevel Gear
Axle Shaft/ Half Shaft & Through Shaft
Axle Housing& Axle Assembly
Steering knuckle & Front Axle
Brake Drum& Wheel Hub
Main Reducer Housing
Oil Seal Seat
Nut& Shim Series
Brake Backing Plate
Chassis Support Products Leaf Spring Bracket
Drop Arm Series
Bracket Series
Leaf Spring Shackle Series
Balanced Suspension Series Balance Shaft Assembly
Balance Shaft Housing
Axle Spring Seat
Thrust Rod
Balance Shaft Parts
Shock Absorber Series Shock Absorber
Shock Absorbing Airbag
Steering System Power Steering Pump
Power Steering Gear
Rubber Products Oil Seal
Rubber Support
Thrust Rod Rubber Core
Truck Belt
Engine support
Clutch Series Clutch Pressure Plate
Clutch Disc
Flywheel Assembly
Flywheel Ring Gear
Adjusting Arm Series  


Working Principle

Single reduction gear is a driving bevel gear (commonly known as angular gear) and a basin angle gear pair. The driving bevel gear is connected with the transmission shaft, rotates clockwise, sticks to its right side from the bevel gear, and rotates downward at the meshing point, which is consistent with the CHINAMFG direction of the wheel. Due to the small diameter of the driving bevel gear and the large diameter of the bevel gear, the function of deceleration is achieved.
The double reduction has an additional intermediate transition gear.The left side of the driving bevel gear is meshed with the bevel gear of the intermediate gear. The bevel gear is coaxial with a spur gear with small diameter, and the spur gear is meshed with the driven gear. In this way, the intermediate gear rotates backward and the driven gear rotates forward. There is a two-stage deceleration process in the middle.
Due to the increase of axle volume, double reduction was mainly used in vehicles with low engine power in the past, mainly in construction machinery with low speed and high torque.
In the double reduction final drive, if the second-stage deceleration is carried out near the wheel, it actually constitutes an independent part at the 2 wheels, it is called wheel reducer. The advantage of this is that the torque transmitted by the half shaft can be reduced, which is conducive to reducing the size and quality of the half shaft. The wheel reducer can be planetary gear type or composed of a pair of cylindrical gear pairs. When the cylindrical gear pair is used for wheel side deceleration, the up-down position relationship between the wheel axis and the half shaft can be changed by adjusting the mutual position of the 2 gears. This kind of axle is called portal axle, which is often used for vehicles with special requirements for the high and low position of the axle.
According to the number of the main reducer transmission ratio, it can be divided into single-speed and double-speed. 
Domestic cars basically adopt single speed main reducer with fixed transmission ratio. On the double reduction final drive, there are 2 transmission ratios for selection, and this main reducer actually acts as an auxiliary transmission.

Packaging & Shipping



Q1. How to guarantee your after-sales service?
Strict inspection during production, Strictly check the products before shipment to ensure our packaging in good condition. Track and receive feedback from customer regularly. Our products warranty is 365 days.
Each product provides quality assurance service. If there is a problem with the product within the warranty period, the customer can negotiate with us in detail about the related claims, and we will do our best to satisfy the customer.

Q2. How can I accurately buy the products I need?
We need accurate product number, If you can’t provide product number, you can send us your product picture, or tell us your truck model, engine name plate, and so on. we will
determine exactly what you need products.

Q3. Do you accept third party inspection?
Yes.we do

Q4. How about your delivery time?
Generally, it will take 3 to 10 days after receiving your advance payment. The specific delivery time depends on the items and the quantity of your order.

Q5. What are your brand agency conditions and advantages?
After we CHINAMFG an agent in 1 city, we will not CHINAMFG a second company to protect the agent’s brand advantage and price advantage. And we will help the agent develop customers and solve all kinds of difficult and miscellaneous problems about products.

Q6. What is your terms of payment?
By TT or LC. We’ll show you the photos of the products and packages before you pay the balance.

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After-sales Service: Support
Warranty: 12 Months
Type: Chassis
US$ 45/Piece
1 Piece(Min.Order)


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Return&refunds: You can apply for a refund up to 30 days after receipt of the products.

differential gear

How does a differential gear distribute power between the wheels?

A differential gear is responsible for distributing power between the wheels of a vehicle, allowing them to rotate at different speeds while maintaining torque transfer. Here’s a detailed explanation of how a differential gear accomplishes this:

1. Power Input:

The differential gear receives power from the transmission or driveshaft connected to the engine. This power is transmitted to the differential assembly, which is typically located in the axle housing.

2. Ring and Pinion Gears:

Within the differential assembly, the power from the driveshaft is transferred to the ring and pinion gears. The ring gear is a large gear that surrounds the differential assembly, while the pinion gear is a smaller gear connected to the driveshaft. The interaction between these gears allows the power to be redirected.

3. Side Gears and Spider Gears:

The ring gear is connected to side gears, also known as bevel gears, through a set of small gears called spider gears. The side gears are attached to the axle shafts, which are responsible for transmitting power to the wheels. The spider gears allow the side gears to rotate independently of each other while maintaining torque transfer.

4. Differential Action:

As the vehicle moves, the differential gears enable the wheels to rotate at different speeds during turns. When the vehicle is moving in a straight line, the spider gears rotate smoothly, allowing equal power distribution to both wheels. However, during a turn, the inside wheel travels a shorter distance than the outside wheel, causing them to rotate at different speeds.

5. Speed and Torque Distribution:

The differential gear adjusts the speed and torque distribution between the wheels based on their rotational differences. When the vehicle is turning, the spider gears allow one wheel to rotate faster than the other, ensuring that torque is transferred to the wheel with better traction. This allows the wheels to rotate at different speeds, preventing tire scrubbing and providing smooth cornering.

6. Limited-Slip and Locking Differentials:

In certain differential systems, such as limited-slip differentials or locking differentials, additional mechanisms are incorporated to enhance traction and power distribution. Limited-slip differentials use clutch packs or friction plates to provide a predetermined amount of resistance, allowing some speed differentiation between the wheels while still transferring power. Locking differentials, on the other hand, lock the side gears together, ensuring equal torque distribution to both wheels, regardless of traction conditions.

7. Differential Types:

There are various types of differentials, including open differentials, limited-slip differentials, electronic differentials, torque vectoring differentials, and more. Each type has its own mechanisms and technologies to distribute power between the wheels effectively, depending on the vehicle’s requirements and driving conditions.

In summary, a differential gear distributes power between the wheels by utilizing a system of gears, including ring and pinion gears, side gears, and spider gears. The differential action allows the wheels to rotate at different speeds during turns, ensuring smooth cornering and preventing tire scrubbing. Additional mechanisms, such as limited-slip or locking differentials, can further enhance traction and power distribution in various driving conditions.

differential gear

How do differential gears contribute to traction in slippery conditions?

In slippery conditions, such as driving on ice, snow, or wet surfaces, differential gears play a crucial role in improving traction and maintaining vehicle control. Here’s a detailed explanation of how differential gears contribute to traction in slippery conditions:

  • Torque Distribution: Differential gears allow torque to be distributed between the wheels on the same axle. In slippery conditions, where traction is reduced, differential gears enable power to be sent to the wheels with better grip. This distribution of torque helps maximize traction and prevent wheel spin.
  • Wheel Speed Variation: In slippery conditions, the wheels on the same axle may encounter different levels of traction. For example, one wheel might be on a patch of ice while the other is on a surface with better grip. Differential gears accommodate this variation by allowing the wheels to rotate at different speeds. This wheel speed variation helps ensure that power is directed to the wheels with more traction, improving overall grip and stability.
  • Slip Limitation: When one wheel loses traction and starts to slip, the other wheel with better grip can potentially receive less power due to the default behavior of an open differential. However, some differential systems employ advanced features like limited-slip differentials (LSD) or electronic traction control systems. These systems detect wheel slip and apply mechanisms to limit slip and redirect power to the wheel with better traction, effectively improving traction in slippery conditions.
  • Positive Traction Devices: In some cases, differential gears can be equipped with positive traction devices such as locking differentials or electronic locking differentials. These devices lock the differential gears, forcing both wheels on the same axle to rotate at the same speed. This feature is particularly beneficial in extremely slippery conditions where maximum traction is essential. By locking the differential, these devices ensure that power is evenly distributed to both wheels, maximizing grip and traction.
  • Off-Road Capability: Differential gears with advanced features like limited-slip differentials or locking differentials are commonly employed in off-road vehicles. These vehicles often encounter challenging terrain with low-traction conditions. The differential systems in these vehicles enhance off-road capability by transferring power to the wheels with the most traction, preventing wheel spin, and allowing the vehicle to navigate through difficult terrain more effectively.

In summary, differential gears contribute to traction in slippery conditions by distributing torque between wheels, accommodating wheel speed variation, limiting slip through advanced features, and offering positive traction devices. These mechanisms allow power to be directed to the wheels with better grip, improving traction, stability, and overall vehicle control in slippery conditions.

differential gear

How do differential gears contribute to handling and stability in vehicles?

Differential gears play a significant role in enhancing the handling and stability of vehicles. Here’s a detailed explanation:

Differential gears contribute to handling and stability in vehicles in several ways:

1. Independent Wheel Rotation:

One of the primary contributions of differential gears is allowing the wheels to rotate independently. During turns, the outer wheel needs to travel a greater distance than the inner wheel. The differential gear enables this speed differentiation, ensuring that each wheel can rotate at a different speed while still receiving power from the engine. This independent wheel rotation enables smoother and more controlled handling during turns.

2. Balanced Power Distribution:

The differential gear distributes torque between the wheels, allowing them to receive power and propel the vehicle forward. By balancing the power distribution, the differential helps maintain stability during acceleration and deceleration. It ensures that both wheels receive an appropriate amount of power, preventing excessive wheel spin or traction loss, which can affect the vehicle’s stability.

3. Enhanced Traction:

Effective traction is crucial for handling and stability. Differential gears play a key role in optimizing traction. In situations where one wheel encounters reduced traction, such as on slippery surfaces or during cornering, the differential allows the wheel with better traction to receive more power. This torque distribution helps maximize the vehicle’s ability to maintain forward motion and improves overall stability by minimizing wheel slip.

4. Improved Steering Response:

The differential gear contributes to improved steering response, which is essential for handling and stability. By allowing the wheels to rotate independently, the differential enhances the vehicle’s ability to respond to steering inputs. It enables precise and controlled turning, allowing the driver to navigate corners and curves with better accuracy and confidence.

5. Balanced Weight Distribution:

Proper weight distribution is critical for optimal handling and stability. The differential gear helps maintain balanced weight distribution among the wheels. During turns, the weight of the vehicle shifts towards the outside wheels. The differential allows the outer wheel to rotate faster, accommodating this weight transfer and promoting stability. By ensuring balanced weight distribution, the differential contributes to predictable and controlled handling.

6. Prevention of Wheel Hop:

Wheel hop, which refers to the rapid up-and-down movement of the wheels during acceleration or on uneven surfaces, can negatively impact stability and handling. The differential gear helps prevent wheel hop by allowing the wheels to rotate at different speeds. This flexibility in wheel rotation reduces the likelihood of wheel hop, improving stability and maintaining better traction on the road.

In summary, differential gears contribute significantly to handling and stability in vehicles. They enable independent wheel rotation, balance power distribution, optimize traction, improve steering response, maintain balanced weight distribution, and prevent wheel hop. By facilitating smooth and controlled handling, the differential gear enhances the overall stability and performance of vehicles.

China factory Truck Spare Parts Axle Differential Half Shaft Side Gear for Sinotruk-HOWO 199012320009 gear ratio calculatorChina factory Truck Spare Parts Axle Differential Half Shaft Side Gear for Sinotruk-HOWO 199012320009 gear ratio calculator
editor by Dream 2024-05-14