China Professional Metal Injection Molding Sintered Iron – Base Gears for Automobile Parts with Great quality

Product Description

Iron alloy base sintered oil sleeve bushing by powder metallurgy

Material Iron powder, alloy powder,precious metal powder
Technology Sintering – Powder Metallurgy
  Certificate ISO9001/TS16949
Surface Treatment High frequency quenching, oil impregnation,CNC,vacuum cleaning,polishing,
Apperance No crumbling, cracks, exfoliation, voids, metal pitting and other defects
Process Flow
Powder mixing – Forming – Sintering – Oil impregnation – Sizing -Ultrasonic cleaning – Steam oxidation – Oil impregnation – Final inspection – Packing
Application Motorcycle parts, auto parts, Power Tools parts, Motor parts, electric Bicycle,

Production process of powder metallurgy
Powder mixing – Forming – Sintering – Oil impregnation – Sizing -Ultrasonic cleaning – Steam oxidation – Oil impregnation – Final inspection – Packing

A trained, qualified, and dedicated work force

  1. Engineering is our strength – we will help your designers convert your parts to cost-effective powdered metal parts.
  2. Every employee is trained to a standard of excellence.

Quality is designed into the process

  1. Consistent and committed attitude to quality first.

Critical characteristics are measured and controlled using the latest statistical methods

  1. Quality is always the first priority.
  2. Our subcontractors are held to the same high standards.


Application: Motor, Electric Cars, Motorcycle, Machinery
Hardness: Hardened Tooth Surface
Gear Position: Internal Gear
Manufacturing Method: Sintered Gear
Toothed Portion Shape: Spur Gear
Material: Stainless Steel
US$ 0/Piece
1 Piece(Min.Order)

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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 the impact of gear selection on fuel efficiency in a car?

Gear selection in a car has a significant impact on fuel efficiency. Here’s a detailed explanation:

1. Optimal Engine Speed:

Choosing the right gear allows the engine to operate at its optimal speed or within its “power band.” Each engine has a range of RPM (revolutions per minute) where it delivers the best balance of power and fuel efficiency. By selecting the appropriate gear, the engine can stay within this range, maximizing fuel efficiency.

2. Engine Load:

Gear selection affects the load on the engine. Higher gears, such as fifth or sixth gear, provide a higher gear ratio, reducing the engine’s rotational speed for a given vehicle speed. This reduces the load on the engine and can improve fuel efficiency, especially during highway driving where maintaining a steady speed is common.

3. Avoiding Over-Revving:

Shifting to a higher gear at the right time helps prevent the engine from over-revving. Over-revving occurs when the engine operates at excessively high RPM, which can waste fuel and potentially cause engine damage. By upshifting in a timely manner, the engine can run at a more efficient RPM range, leading to better fuel economy.

4. Acceleration and Deceleration:

The choice of gear during acceleration and deceleration also affects fuel efficiency. During acceleration, shifting up to higher gears smoothly and at appropriate RPM levels promotes fuel efficiency. Similarly, when decelerating, downshifting to lower gears while utilizing engine braking can save fuel by reducing the need for excessive braking and maintaining better control over vehicle speed.

5. Driving Conditions:

The impact of gear selection on fuel efficiency can vary based on driving conditions. For example, in hilly or mountainous terrains, downshifting to lower gears on uphill climbs can provide the necessary power while avoiding excessive fuel consumption. In stop-and-go city traffic, selecting lower gears can aid in smoother acceleration from a standstill, reducing fuel waste.

6. Manual vs. Automatic Transmissions:

The impact of gear selection on fuel efficiency can differ between manual and automatic transmissions. Manual transmissions offer more control over gear selection, allowing drivers to optimize fuel efficiency by choosing the most suitable gear for a given situation. On the other hand, modern automatic transmissions are designed to optimize fuel efficiency by automatically selecting the appropriate gear based on driving conditions and engine load.

In summary, gear selection plays a crucial role in determining fuel efficiency in a car. Optimal gear selection helps keep the engine operating at its most efficient RPM range, reduces engine load, prevents over-revving, and promotes smoother acceleration and deceleration. By understanding the relationship between gear selection and fuel efficiency, drivers can adopt driving habits that maximize fuel economy and reduce fuel consumption.

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 Professional Metal Injection Molding Sintered Iron - Base Gears for Automobile Parts with Great qualityChina Professional Metal Injection Molding Sintered Iron - Base Gears for Automobile Parts with Great quality
editor by CX 2023-10-07