China supplier OEM ODM Customized Aluminum Die Casting Housing of Belt Tension Pulley pulley attachments

Product Description


Company Profile

Hongxin is IATF16949 ceritficated and professional in designing and manufacturing molds,producing prototype, precision high-pressure aluminum alloy die casting parts,zinc alloy high-pressure die casting parts, precision CNC parts and precision plastic injection parts.

Product Description

Technical parameters Aluminum alloy die casting: ADC12/A360/A380/Alsi9cu3/Alsi12Cu1Fe/Alsi12Fe
Zinc alloy die casting:ZA3#,ZA5#,ZA8#
Plastic injection: PA6/PA66/ABS/PC/POM/PE
Aluminum alloy profile extrusion: 6061/6063/6082/7075
CNC machining and Turnning: 6061/6063/5052
Part Weight: From 10g to 50000g
Manufacture Process Drawing/Sample→Mold→Die casting→Deburring → Polishing→CNC Machining→Surface Finishing→ Assembly →Quality Inspection→Packaging→Delivery
Equipment Cold chamber die casting machine:180T/280T/350T/500T/800T/1250T
Injection machines: 88T/128T/160T/250T/380T/500T
CNC centers, CNC turning, CNC lathes, electrical pulse, line cutting, milling, drilling, grinding
Surface Treatment Trimming, Deburring,Polishing, Shot blasting, Sandblasting,Tumbling, Powder coating, Anodizing, Chrome, Electrophoresis, Passivation, Chemical coating
Software Pro-e/Solid work/UG/Auto CAD/CATIA
Products Application Automotive, Electric Motor, Light, Motorcycle,Bicycle, Power tool, Telecommunication, Gas Meter, Home Appliance Equipment, Compressors, Flow Meters, Pumps, Valves, Traffic Equipment, etc.

Our Advantages

  • Direct manufacturer, lower cost and quicker feedback
  • Specialist in prototyping, help you fast verify your design
  • Specialist in low quantity orders (no MOQ requirement for aluminum CNC parts)
  • Specialist in one-step production services from designing to assembly

Facility capability







Q1. Where is your company?
A:Our company is located in HangZhou City, ZHangZhoug province, which is known as the hometown of mold
Q2. Are you a factory or trading company?
A: We are a direct and professional factory and specialized in die casting industry since 2011.
Q3.Can your company make by sample?
A: Yes, we can make by both the sample and drawing.
Q4. What do I need to provide if I want to customize products and get a offer?
A: You can send 2D & 3D drawing(.step/.stp/.igs/.dwg is prefer) or samples and detailed requirement to our team.
Q5. What’s the process of Customizing product?
A: 1. Design of product drawings/samples. 2. Confirm the drawing with the customer. 3. Make the mold.  4. Send sample to customer for approval. 5. Receive confirmation from customer and series production. 6. Quality inspection 7. Packing and shipping.
Q6. Can your company make the mold?
A: Yes, design mold and make mold and fixture by ourselves.
Q7. Your company’s yearly production capacity?
A: 200 set of molds, 5 Million die casting parts and aluminum extrusion parts, 1 Million plastic injection parts
Q8. What is the minimum order quantity?
A:No MOQ for aluminum CNC parts. Low MOQ can be provided to help you test market.
Q9. How long is the lead time?
A: Depends on the order quantity. 1 week for prototypes,Normally 3-7 weeks for mold, 2-4 weeks for series production parts.
Q10. How do you package the products?
A: Bubble bag – Carton Box – Wooden pallet. Special packaging method can be accepted.
Q11. What is the payment method?
Q12.How is the quality?
A: Strict control before shipment.
Q13: What if I got some defective products?
A:If you find any defective products, we will exchange good products or refund you immediately. If you have any questions, please feel free to contact us.


Die Casting Machine Type: Cold Chamber Die Casting Machine
Die Casting Method: Precision Die Casting
Application: Auto Parts
Machining: CNC Machining
Material: Aluminum Alloy
Surface Preparation: Spray Coating
US$ 5/Piece
1 Piece(Min.Order)

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How does the diameter of a pulley affect its mechanical advantage?

The diameter of a pulley plays a significant role in determining its mechanical advantage. Mechanical advantage refers to the ratio of the output force or load to the input force or effort applied to the pulley system. Here’s how the diameter of a pulley affects its mechanical advantage:

1. Larger Diameter: When the diameter of a pulley increases, the mechanical advantage also increases. A larger diameter means that the circumference of the pulley is greater, allowing a longer length of rope or belt to be wrapped around it. As a result, a larger pulley requires less effort force to lift a given load. This is because the load is distributed over a greater length of rope or belt, reducing the force required to overcome the load.

2. Smaller Diameter: Conversely, when the diameter of a pulley decreases, the mechanical advantage decreases. A smaller diameter means that the circumference of the pulley is reduced, resulting in a shorter length of rope or belt wrapped around it. As a result, a smaller pulley requires more effort force to lift a given load. This is because the load is concentrated over a shorter length of rope or belt, requiring a greater force to overcome the load.

It’s important to note that while a larger diameter pulley offers a greater mechanical advantage in terms of reducing the effort force required, it also results in a slower speed of the load being lifted. This is because the longer length of rope or belt requires more input distance to achieve a given output distance. On the other hand, a smaller diameter pulley offers a lower mechanical advantage but allows for a faster speed of the load being lifted.

The mechanical advantage of a pulley system can be calculated using the formula:

Mechanical Advantage = Load / Effort

Where “Load” refers to the weight or force being lifted and “Effort” refers to the force applied to the pulley system. By adjusting the diameter of the pulley, the mechanical advantage can be optimized to suit the specific requirements of the application, balancing the effort force and speed of the load being lifted.


How do pulleys work in garage door openers and winches?

Pulleys play a crucial role in both garage door openers and winches, enabling the smooth and efficient operation of these devices. They provide mechanical advantage, facilitate load lifting and lowering, and contribute to the overall functionality and safety of garage door openers and winches. Here’s how pulleys work in each of these applications:

1. Garage Door Openers:

In a typical garage door opener system, pulleys are used in conjunction with a motor, drive belt or chain, and a set of cables or torsion springs. The pulleys are mounted on the garage door’s torsion bar or header, and the cables or springs are connected to the bottom of the door. Here’s how the pulleys work in a garage door opener:

– Motor and Drive Mechanism: The motor drives a pulley or sprocket, which is connected to a drive belt or chain. As the motor rotates the pulley, the drive belt or chain moves, transferring rotational motion to another pulley or sprocket mounted on the torsion bar.

– Torsion Bar and Cables: The torsion bar, equipped with a pulley, is located above the garage door. The cables are threaded through the pulleys and attached to the bottom of the door on each side. When the motor rotates the torsion bar pulley, the cables move, causing the garage door to open or close.

– Mechanical Advantage: By using pulleys, the garage door opener system creates a mechanical advantage. The arrangement of the pulleys and cables or springs helps distribute the load, making it easier for the motor to lift the heavy garage door. This mechanical advantage reduces the strain on the motor and ensures smooth and controlled movement of the door.

2. Winches:

Pulleys are also integral components of winches used for lifting and pulling heavy loads. Winches consist of a drum or spool around which a cable or rope is wrapped, and pulleys are used to guide and redirect the cable or rope. Here’s how pulleys work in a winch:

– Load Lifting: The cable or rope is wound around the winch drum, and one end is attached to the load to be lifted or pulled. The other end is connected to a fixed point or a secondary pulley system. As the winch drum rotates, the cable or rope is wound or unwound, allowing the load to be lifted or lowered.

– Pulley Systems: Pulleys are used in winches to redirect the cable or rope, providing a mechanical advantage and ensuring smooth movement. Additional pulleys may be employed to create a block and tackle system, further increasing the mechanical advantage and the winch’s lifting capacity.

– Control and Safety: Winches often incorporate braking systems and clutches to control the movement and secure the load. Pulleys play a role in these control mechanisms, helping to regulate the winch’s speed and provide reliable stopping and holding power.

Overall, pulleys are essential components in garage door openers and winches, enabling the smooth and controlled movement of heavy loads. They provide mechanical advantage, facilitate load lifting and lowering, and contribute to the efficiency and safety of these devices.


Can you explain the basic principles of pulley mechanics?

Pulley mechanics are based on a few fundamental principles that govern the operation of pulley systems. Here’s an explanation of the basic principles:

1. Mechanical Advantage: The primary principle of pulley mechanics is mechanical advantage. A pulley system allows for the multiplication of force applied to the rope or belt. By distributing the force over multiple segments of the rope or belt, the load becomes easier to lift or move. The mechanical advantage gained depends on the number of pulleys used in the system. The more pulleys in the system, the greater the mechanical advantage.

2. Force Transmission: When a force is applied to one end of the rope or belt, it creates tension that causes the pulley to rotate. As the pulley turns, the force is transmitted to the load attached to the other end of the rope or belt. This force transmission allows for the movement and manipulation of objects in pulley systems.

3. Directional Change: One of the key principles of pulley mechanics is directional change. A pulley system enables the operator to change the direction of the applied force. By redirecting the force along a different path, a pulley system allows for force to be exerted from a more convenient or advantageous position. This directional change is particularly useful in situations where the force needs to be applied vertically, horizontally, or at an angle.

4. Conservation of Energy: Pulley mechanics also adhere to the principle of conservation of energy. The work done on the load by the applied force is equal to the work done against the load’s weight. Through the pulley system, the input force is transformed into an output force that moves or lifts the load. The energy input and output remain the same, but the pulley system allows for the distribution and transformation of forces to achieve the desired mechanical advantage.

5. Speed and Torque Conversion: Pulleys can also be used to convert speed and torque in mechanical systems. By varying the size of the pulleys or using pulleys of different diameters, the rotational speed and torque can be adjusted according to the requirements of the system. This speed and torque conversion allows for the optimization of power transmission and the matching of different rotational speeds between input and output components.

6. Multiple Pulley Systems: Pulleys can be combined in systems to achieve increased mechanical advantage or to create complex motion patterns. In systems with multiple pulleys, such as block and tackle arrangements, the load is distributed over several segments of rope or belt, further reducing the effort required to lift heavy objects. These systems are often used in cranes, elevators, and other applications where heavy lifting is necessary.

These basic principles of pulley mechanics form the foundation for the understanding and application of pulleys in mechanical systems. By harnessing mechanical advantage, force transmission, directional change, conservation of energy, and speed/torque conversion, pulley systems provide a versatile means of lifting, moving, and manipulating loads in various applications.

China supplier OEM ODM Customized Aluminum Die Casting Housing of Belt Tension Pulley   pulley attachments	China supplier OEM ODM Customized Aluminum Die Casting Housing of Belt Tension Pulley   pulley attachments
editor by CX


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