Tag Archives: stepped shaft

China Hot selling Turning Milling Precison Part CNC Machining Stepped Stainless Drive Shaft for Medical Drive Line

Product Description

Company Profile

                                                                —–ABOUT US—–
Focuses on the research, development, production, sales and service of fasteners, precision hardware parts and various metal products.

HangZhou CZPT CZPT Technology Co., Ltd. was established on March 1, 2016. It is located in Xihu (West Lake) Dis.ang District, HangZhou City, ZheJiang Province. It covers an area of 5600 square CZPT and focuses on the research, development, production, sales and service of fasteners, precision hardware parts and various metal products. The processed products are mainly cold heading, forging, precision turning, milling, assembly, stamping, supplemented by extrusion, upsetting and casting. In addition, we also have rich experience in anodizing, electroplating and heat treatment.

Product Parameters

No. Item Specifications
1 Materials Carbon steel: 12L15, 45#, 42CrMo;
Stainless steel: 303, 304, 316, 420, 630;
Aluminum alloy: 6061, 6063, 5052, 7075;
Copper alloy: brass H58-H63, phosphor bronze, beryllium copper;
Pure copper: T0 oxygen-free copper, T2 red copper;
Plastics: nylon, bakelite, POM, PEEK;
2 Diameter Ø0.3-Ø50
3 Diameter tolerance 0.005mm
4 Hardness: HRC/HV
5 Length 0.5mm-500mm
6 Heat treatment Oil Quenching
High frequency quenching
Carburization
Vacuum Heat treatment
Mesh belt CZPT heat treatment
7 Surface treatment Electrolytic plating (barrel plating, rack plating);
Electroless plating (nickel plating);
Ordinary sandblasting and anodizing (black, silver, gray, gold, red)
Plastic spraying, spraying metal paint, etc.;

Work Shop

Certifications

 

Research & Development

Development intervention
Development ability
Cost accounting
Quality control
Production feasibility assessment
Project landing
Assembly service
Complex project decomposition & optimization capabilities
Quick sample
Optimization of the mold plan for mass products

Product Category

Precision turning parts

 

Precision machining parts

Special requirements appearance parts

Presentative Brand

 

Why Choose Us?

 

Create value for customers

Support + Service + Made in China + Technological Innovation = Solution
★ Project management, solutions
★ Quickly designing and sampling
★ New product development, technological breakthrough
★ Component and machine assembly service

Engineering capabilities
★Development intervention
★Development ability
Cost accounting
Quality control
Production feasibility assessment
Project landing
Assembly service
★Complex project decomposition & optimization capabilities
★Quick sample
★Optimization of the mold plan for mass products /* January 22, 2571 19:08:37 */!function(){function s(e,r){var a,o={};try{e&&e.split(“,”).forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1

Material: Alloy Steel
Load: Drive Shaft
Stiffness & Flexibility: Stiffness / Rigid Axle
Customization:
Available

|

Customized Request

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

pto shaft

How do manufacturers ensure the compatibility of driveline components with different vehicles?

Manufacturers employ various measures to ensure the compatibility of driveline components with different vehicles. These measures involve careful design, engineering, testing, and standardization processes to meet the specific requirements of each vehicle type. Let’s explore how manufacturers ensure compatibility:

1. Vehicle-Specific Design:

Manufacturers design driveline components with specific vehicle types in mind. Each vehicle type, such as passenger cars, trucks, SUVs, or commercial vehicles, has unique requirements in terms of power output, torque capacity, weight distribution, space constraints, and intended usage. Manufacturers consider these factors during the component design phase to ensure that the driveline components are optimized for compatibility with the intended vehicle type.

2. Engineering and Simulation:

Manufacturers employ advanced engineering techniques and simulation tools to evaluate the performance and compatibility of driveline components. They use computer-aided design (CAD) software and finite element analysis (FEA) simulations to model and analyze the behavior of the components under various operating conditions. This allows them to identify any potential compatibility issues, such as excessive stress, misalignment, or interference, and make necessary design adjustments before moving to the production stage.

3. Prototyping and Testing:

Manufacturers create prototypes of driveline components and subject them to rigorous testing to ensure compatibility. These tests include bench testing, dynamometer testing, and vehicle-level testing. By simulating real-world operating conditions, manufacturers can evaluate the performance, durability, and compatibility of the components. They assess factors such as power transmission efficiency, torque capacity, heat dissipation, noise and vibration levels, and overall drivability to ensure that the components meet the requirements and are compatible with the intended vehicle.

4. Standardization:

Manufacturers adhere to industry standards and specifications to ensure compatibility and interchangeability of driveline components. These standards cover various aspects such as dimensions, material properties, spline profiles, shaft diameters, and mounting interfaces. By following established standards, manufacturers can ensure that their driveline components can be seamlessly integrated into different vehicles from various manufacturers, promoting compatibility and ease of replacement or upgrade.

5. Collaborative Development:

Manufacturers often collaborate closely with vehicle manufacturers during the development process to ensure compatibility. This collaboration involves sharing specifications, design requirements, and performance targets. By working together, driveline manufacturers can align their component designs with the vehicle manufacturer’s specifications, ensuring that the driveline components fit within the vehicle’s space constraints, mating interfaces, and intended usage. This collaborative approach helps optimize compatibility and integration between the driveline components and the vehicle’s overall system.

6. Continuous Improvement:

Manufacturers continuously improve their driveline components based on feedback, field data, and advancements in technology. They gather information from vehicle manufacturers, end-users, and warranty claims to identify any compatibility issues or performance shortcomings. This feedback loop helps drive refinements and enhancements in the design, manufacturing processes, and material selection of the driveline components, ensuring better compatibility and performance in future iterations.

Overall, manufacturers employ a combination of vehicle-specific design, engineering and simulation, prototyping and testing, standardization, collaborative development, and continuous improvement to ensure the compatibility of driveline components with different vehicles. These efforts help optimize power transmission, reliability, and performance, while ensuring a seamless integration of the driveline components into the diverse range of vehicles present in the market.

pto shaft

How do drivelines handle variations in speed and direction during operation?

Drivelines are designed to handle variations in speed and direction during operation, enabling the efficient transfer of power from the engine to the wheels. They employ various components and mechanisms to accommodate these variations and ensure smooth and reliable power transmission. Let’s explore how drivelines handle speed and direction variations:

1. Transmissions:

Transmissions play a crucial role in managing speed variations in drivelines. They allow for the selection of different gear ratios to match the engine’s torque and speed with the desired vehicle speed. By shifting gears, the transmission adjusts the rotational speed and torque delivered to the driveline, enabling the vehicle to operate effectively at various speeds. Transmissions can be manual, automatic, or continuously variable, each with its own mechanism for achieving speed variation control.

2. Clutches:

Clutches are used in drivelines to engage or disengage power transmission between the engine and the driveline components. They allow for smooth engagement during startup and shifting gears, as well as for disconnecting the driveline when the vehicle is stationary or the engine is idling. Clutches facilitate the control of speed variations by providing a means to temporarily interrupt power flow and smoothly transfer torque between rotating components.

3. Differential:

The differential is a key component in drivelines, particularly in vehicles with multiple driven wheels. It allows the wheels to rotate at different speeds while maintaining power transfer. When a vehicle turns, the inside and outside wheels travel different distances and need to rotate at different speeds. The differential allows for this speed variation by distributing torque between the wheels, ensuring smooth operation and preventing tire scrubbing or driveline binding.

4. Universal Joints and CV Joints:

Universal joints and constant velocity (CV) joints are used in drivelines to accommodate variations in direction. Universal joints are typically employed in drivelines with a driveshaft, allowing for the transmission of rotational motion even when there is an angular misalignment between the driving and driven components. CV joints, on the other hand, are used in drivelines that require constant velocity and smooth power transfer at varying angles, such as front-wheel drive vehicles. These joints allow for a consistent transfer of torque while accommodating changes in direction.

5. Transfer Cases:

In drivelines with multiple axles or drivetrains, transfer cases are used to distribute power and torque to different wheels or axles. Transfer cases are commonly found in four-wheel drive or all-wheel drive systems. They allow for variations in speed and direction by proportionally distributing torque between the front and rear wheels, or between different axles, based on the traction requirements of the vehicle.

6. Electronic Control Systems:

Modern drivelines often incorporate electronic control systems to further enhance speed and direction control. These systems utilize sensors, actuators, and computer algorithms to monitor and adjust power distribution, shift points, and torque delivery based on various inputs, such as vehicle speed, throttle position, wheel slip, and road conditions. Electronic control systems enable precise and dynamic management of speed and direction variations, improving traction, fuel efficiency, and overall driveline performance.

By integrating transmissions, clutches, differentials, universal joints, CV joints, transfer cases, and electronic control systems, drivelines effectively handle variations in speed and direction during operation. These components and mechanisms work together to ensure smooth power transmission, optimized performance, and enhanced vehicle control in a wide range of driving conditions and applications.

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How do drivelines contribute to power transmission and motion in various applications?

Drivelines play a crucial role in power transmission and motion in various applications, including automotive vehicles, agricultural machinery, construction equipment, and industrial systems. They are responsible for transmitting power from the engine or power source to the driven components, enabling motion and providing the necessary torque to perform specific tasks. Here’s a detailed explanation of how drivelines contribute to power transmission and motion in various applications:

1. Automotive Vehicles: In automotive vehicles, such as cars, trucks, and motorcycles, drivelines transmit power from the engine to the wheels, enabling motion and propulsion. The driveline consists of components such as the engine, transmission, drive shafts, differentials, and axles. The engine generates power by burning fuel, and this power is transferred to the transmission. The transmission selects the appropriate gear ratio and transfers power to the drive shafts. The drive shafts transmit the power to the differentials, which distribute it to the wheels. The wheels, in turn, convert the rotational power into linear motion, propelling the vehicle forward or backward.

2. Agricultural Machinery: Drivelines are extensively used in agricultural machinery, such as tractors, combines, and harvesters. These machines require power transmission to perform various tasks, including plowing, tilling, planting, and harvesting. The driveline in agricultural machinery typically consists of a power take-off (PTO) unit, drive shafts, gearboxes, and implement shafts. The PTO unit connects to the tractor’s engine and transfers power to the drive shafts. The drive shafts transmit power to the gearboxes, which further distribute it to the implement shafts. The implement shafts drive the specific agricultural implements, enabling them to perform their intended functions.

3. Construction Equipment: Drivelines are essential in construction equipment, such as excavators, loaders, bulldozers, and cranes. These machines require power transmission to perform tasks such as digging, lifting, pushing, and hauling. The driveline in construction equipment typically consists of an engine, transmission, drive shafts, hydraulic systems, and various gear mechanisms. The engine generates power, which is transferred to the transmission. The transmission, along with the hydraulic systems and gear mechanisms, converts and controls the power to drive the different components of the equipment, allowing them to perform their specific functions.

4. Industrial Systems: Drivelines are widely used in industrial systems and machinery, including conveyor systems, manufacturing equipment, and heavy-duty machinery. These applications require power transmission for material handling, processing, and production. The driveline in industrial systems often involves electric motors, gearboxes, drive shafts, couplings, and driven components. The electric motor provides rotational power, which is transmitted through the driveline components to drive the machinery or conveyors, facilitating the desired motion and power transmission within the industrial system.

5. Power Generation: Drivelines are also employed in power generation applications, such as generators and turbines. These systems require power transmission to convert mechanical energy into electrical energy. The driveline in power generation often consists of a prime mover, such as an internal combustion engine or a steam turbine, connected to a generator. The driveline components, such as couplings, gearboxes, and drive shafts, transmit the rotational power from the prime mover to the generator, which converts it into electrical power.

6. Marine and Aerospace Applications: Drivelines are utilized in marine vessels and aerospace systems to facilitate propulsion and motion. In marine applications, drivelines transfer power from engines or turbines to propellers or water jets, enabling the vessel to move through the water. In aerospace applications, drivelines transmit power from engines to various components, such as rotors or propellers, providing the necessary thrust for flight.

In summary, drivelines are integral to power transmission and motion in a wide range of applications. They enable the transfer of power from the engine or power source to the driven components, allowing for the generation of torque and the performance of specific tasks. Drivelines play a vital role in automotive vehicles, agricultural machinery, construction equipment, industrial systems, power generation, and marine and aerospace applications, contributing to efficient power transmission, motion, and the overall functionality of these diverse systems.

China Hot selling Turning Milling Precison Part CNC Machining Stepped Stainless Drive Shaft for Medical Drive LineChina Hot selling Turning Milling Precison Part CNC Machining Stepped Stainless Drive Shaft for Medical Drive Line
editor by CX 2024-05-06

China Customed Lighting Turning Precision Stainless Steel Axle Stepped Drive Shaft with Mechanical Parts for Robot Vacuum and Motor with Hot selling

Product Description

Company Profile

                                                                —–ABOUT US—–
Focuses on the analysis, advancement, creation, product sales and support of fasteners, precision components parts and a variety of metallic items.

HangZhou Bozuan Jinggong Technology Co., Ltd. was established on March 1, 2016. It is positioned in Xihu (West Lake) Dis.ang District, HangZhou Metropolis, ZheJiang Province. It handles an spot of 5600 sq. meters and focuses on the research, growth, generation, sales and services of fasteners, precision hardware elements and different metallic products. The processed merchandise are largely cold heading, forging, precision turning, milling, assembly, stamping, supplemented by extrusion, upsetting and casting. In addition, we also have wealthy experience in anodizing, electroplating and warmth treatment.

Product Parameters

No. Merchandise Requirements
1 Supplies Carbon steel: 12L15, 45#, 42CrMo
Stainless metal: 303, 304, 316, 420, 630
Aluminum alloy: 6061, 6063, 5052, 7075
Copper alloy: brass H58-H63, phosphor bronze, beryllium copper
Pure copper: T0 oxygen-totally free copper, T2 red copper
Plastics: nylon, bakelite, POM, PEEK
two Diameter Ø0.3-Ø50
three Diameter tolerance .005mm
4 Hardness: HRC/HV
five Duration .5mm-500mm
6 Warmth treatment method Oil Quenching
High frequency quenching
Carburization
Vacuum Heat therapy
Mesh belt CZPT heat therapy
7 Area therapy Electrolytic plating (barrel plating, rack plating)
Electroless plating (nickel plating)
Regular sandblasting and anodizing (black, silver, grey, gold, crimson)
Plastic spraying, spraying steel paint, and many others.

Perform Store

Certifications

 

Study & Improvement

Advancement intervention
Development potential
Price accounting
Quality management
Generation feasibility assessment
Task landing
Assembly support
Sophisticated task decomposition & optimization abilities
Rapid sample
Optimization of the mould program for mass goods

Product Class

Precision turning parts

Precision machining elements


Unique demands look elements

Presentative Brand name

 

Why Pick Us?

 

Develop price for customers

Assist + Service + Made in China + Technological Innovation = Solution
★ Project management, options
★ Quickly designing and sampling
★ New solution advancement, technological breakthrough
★ Element and device assembly provider

Engineering capabilities
★Development intervention
★Development capability
Value accounting
Top quality control
Generation feasibility evaluation
Task landing
Assembly support
★Complex venture decomposition & optimization abilities
★Quick sample
★Optimization of the mold prepare for mass items

US $0.15
/ Piece
|
1,000 Pieces

(Min. Order)

###

Material: Alloy Steel
Load: Drive Shaft
Stiffness & Flexibility: Stiffness / Rigid Axle
Journal Diameter Dimensional Accuracy: IT6-IT9
Axis Shape: Straight Shaft
Shaft Shape: Stepped Shaft

###

Customization:

###

No. Item Specifications
1 Materials Carbon steel: 12L15, 45#, 42CrMo;
Stainless steel: 303, 304, 316, 420, 630;
Aluminum alloy: 6061, 6063, 5052, 7075;
Copper alloy: brass H58-H63, phosphor bronze, beryllium copper;
Pure copper: T0 oxygen-free copper, T2 red copper;
Plastics: nylon, bakelite, POM, PEEK;
2 Diameter Ø0.3-Ø50
3 Diameter tolerance 0.005mm
4 Hardness: HRC/HV
5 Length 0.5mm-500mm
6 Heat treatment Oil Quenching
High frequency quenching
Carburization
Vacuum Heat treatment
Mesh belt furnace heat treatment
7 Surface treatment Electrolytic plating (barrel plating, rack plating);
Electroless plating (nickel plating);
Ordinary sandblasting and anodizing (black, silver, gray, gold, red)
Plastic spraying, spraying metal paint, etc.;
US $0.15
/ Piece
|
1,000 Pieces

(Min. Order)

###

Material: Alloy Steel
Load: Drive Shaft
Stiffness & Flexibility: Stiffness / Rigid Axle
Journal Diameter Dimensional Accuracy: IT6-IT9
Axis Shape: Straight Shaft
Shaft Shape: Stepped Shaft

###

Customization:

###

No. Item Specifications
1 Materials Carbon steel: 12L15, 45#, 42CrMo;
Stainless steel: 303, 304, 316, 420, 630;
Aluminum alloy: 6061, 6063, 5052, 7075;
Copper alloy: brass H58-H63, phosphor bronze, beryllium copper;
Pure copper: T0 oxygen-free copper, T2 red copper;
Plastics: nylon, bakelite, POM, PEEK;
2 Diameter Ø0.3-Ø50
3 Diameter tolerance 0.005mm
4 Hardness: HRC/HV
5 Length 0.5mm-500mm
6 Heat treatment Oil Quenching
High frequency quenching
Carburization
Vacuum Heat treatment
Mesh belt furnace heat treatment
7 Surface treatment Electrolytic plating (barrel plating, rack plating);
Electroless plating (nickel plating);
Ordinary sandblasting and anodizing (black, silver, gray, gold, red)
Plastic spraying, spraying metal paint, etc.;

Why Checking the Drive Shaft is Important

If you hear clicking noises while driving, your driveshaft may need repair. An experienced mechanic can tell if the noise is coming from one side or both sides. This problem is usually related to the torque converter. Read on to learn why it’s so important to have your driveshaft inspected by an auto mechanic. Here are some symptoms to look for. Clicking noises can be caused by many different things. You should first check if the noise is coming from the front or the rear of the vehicle.
air-compressor

hollow drive shaft

Hollow driveshafts have many benefits. They are light and reduce the overall weight of the vehicle. The largest manufacturer of these components in the world is CZPT. They also offer lightweight solutions for various applications, such as high-performance axles. CZPT driveshafts are manufactured using state-of-the-art technology. They offer excellent quality at competitive prices.
The inner diameter of the hollow shaft reduces the magnitude of the internal forces, thereby reducing the amount of torque transmitted. Unlike solid shafts, hollow shafts are getting stronger. The material inside the hollow shaft is slightly lighter, which further reduces its weight and overall torque. However, this also increases its drag at high speeds. This means that in many applications hollow driveshafts are not as efficient as solid driveshafts.
A conventional hollow drive shaft consists of a first rod 14 and a second rod 14 on both sides. The first rod is connected with the second rod, and the second rod extends in the rotation direction. The two rods are then friction welded to the central area of ​​the hollow shaft. The frictional heat generated during the relative rotation helps to connect the two parts. Hollow drive shafts can be used in internal combustion engines and environmentally-friendly vehicles.
The main advantage of a hollow driveshaft is weight reduction. The splines of the hollow drive shaft can be designed to be smaller than the outside diameter of the hollow shaft, which can significantly reduce weight. Hollow shafts are also less likely to jam compared to solid shafts. Hollow driveshafts are expected to eventually occupy the world market for automotive driveshafts. Its advantages include fuel efficiency and greater flexibility compared to solid prop shafts.

Cardan shaft

Cardan shafts are a popular choice in industrial machinery. They are used to transmit power from one machine to another and are available in a variety of sizes and shapes. They are available in a variety of materials, including steel, copper, and aluminum. If you plan to install one of these shafts, it is important to know the different types of Cardan shafts available. To find the best option, browse the catalog.
Telescopic or “Cardan” prop shafts, also known as U-joints, are ideal for efficient torque transfer between the drive and output system. They are efficient, lightweight, and energy-efficient. They employ advanced methods, including finite element modeling (FEM), to ensure maximum performance, weight, and efficiency. Additionally, the Cardan shaft has an adjustable length for easy repositioning.
Another popular choice for driveshafts is the Cardan shaft, also known as a driveshaft. The purpose of the driveshaft is to transfer torque from the engine to the wheels. They are typically used in high-performance car engines. Some types are made of brass, iron, or steel and have unique surface designs. Cardan shafts are available in inclined and parallel configurations.
Single Cardan shafts are a common replacement for standard Cardan shafts, but if you are looking for dual Cardan shafts for your vehicle, you will want to choose the 1310 series. This type is great for lifted jeeps and requires a CV-compatible transfer case. Some even require axle spacers. The dual Cardan shafts are also designed for lifts, which means it’s a good choice for raising and lowering jeeps.
air-compressor

universal joint

Cardan joints are a good choice for drive shafts when operating at a constant speed. Their design allows a constant angular velocity ratio between the input and output shafts. Depending on the application, the recommended speed limit may vary depending on the operating angle, transmission power, and application. These recommendations must be based on pressure. The maximum permissible speed of the drive shaft is determined by determining the angular acceleration.
Because gimbal joints don’t require grease, they can last a long time but eventually fail. If they are poorly lubricated or dry, they can cause metal-to-metal contact. The same is true for U-joints that do not have oil filling capability. While they have a long lifespan, it can be difficult to spot warning signs that could indicate impending joint failure. To avoid this, check the drive shaft regularly.
U-joints should not exceed seventy percent of their lateral critical velocity. However, if this speed is exceeded, the part will experience unacceptable vibration, reducing its useful life. To determine the best U-joint for your application, please contact your universal joint supplier. Typically, lower speeds do not require balancing. In these cases, you should consider using a larger pitch diameter to reduce axial force.
To minimize the angular velocity and torque of the output shaft, the two joints must be in phase. Therefore, the output shaft angular displacement does not completely follow the input shaft. Instead, it will lead or lag. Figure 3 illustrates the angular velocity variation and peak displacement lead of the gimbal. The ratios are shown below. The correct torque for this application is 1360 in-Ibs.

Refurbished drive shaft

Refurbished driveshafts are a good choice for a number of reasons. They are cheaper than brand new alternatives and generally just as reliable. Driveshafts are essential to the function of any car, truck, or bus. These parts are made of hollow metal tubes. While this helps reduce weight and expense, it is vulnerable to external influences. If this happens, it may crack or bend. If the shaft suffers this type of damage, it can cause serious damage to the transmission.
A car’s driveshaft is a critical component that transmits torque from the engine to the wheels. A1 Drive Shaft is a global supplier of automotive driveshafts and related components. Their factory has the capability to refurbish and repair almost any make or model of driveshafts. Refurbished driveshafts are available for every make and model of vehicle. They can be found on the market for a variety of vehicles, including passenger cars, trucks, vans, and SUVs.
Unusual noises indicate that your driveshaft needs to be replaced. Worn U-joints and bushings can cause excessive vibration. These components cause wear on other parts of the drivetrain. If you notice any of these symptoms, please take your vehicle to the AAMCO Bay Area Center for a thorough inspection. If you suspect damage to the driveshaft, don’t wait another minute – it can be very dangerous.
air-compressor

The cost of replacing the drive shaft

The cost of replacing a driveshaft varies, but on average, this repair costs between $200 and $1,500. While this price may vary by vehicle, the cost of parts and labor is generally equal. If you do the repair yourself, you should know how much the parts and labor will cost before you start work. Some parts can be more expensive than others, so it’s a good idea to compare the cost of several locations before deciding where to go.
If you notice any of these symptoms, you should seek a repair shop immediately. If you are still not sure if the driveshaft is damaged, do not drive the car any distance until it is repaired. Symptoms to look for include lack of power, difficulty moving the car, squeaking, clanking, or vibrating when the vehicle is moving.
Parts used in drive shafts include center support bearings, slip joints, and U-joints. The price of the driveshaft varies by vehicle and may vary by model of the same year. Also, different types of driveshafts require different repair methods and are much more expensive. Overall, though, a driveshaft replacement costs between $300 and $1,300. The process may take about an hour, depending on the vehicle model.
Several factors can lead to the need to replace the drive shaft, including bearing corrosion, damaged seals, or other components. In some cases, the U-joint indicates that the drive shaft needs to be replaced. Even if the bearings and u-joints are in good condition, they will eventually break and require the replacement of the drive shaft. However, these parts are not cheap, and if a damaged driveshaft is a symptom of a bigger problem, you should take the time to replace the shaft.

China Customed Lighting Turning Precision Stainless Steel Axle Stepped Drive Shaft with Mechanical Parts for Robot Vacuum and Motor     with Hot selling		China Customed Lighting Turning Precision Stainless Steel Axle Stepped Drive Shaft with Mechanical Parts for Robot Vacuum and Motor     with Hot selling
editor by czh 2023-01-20