Sprockets

Sprockets by Structures

Sprockets by Applications

Sprockets by Materials

Sprockets by Different Standards

Sprockets Types

The American Society of Mechanical Engineers (ASME, formerly known as ANSI) has implemented several standards that not only establish minimum requirements for sprockets but also create categories for different types of sprockets. ASME identifies sprockets based on their dimensions, pitch and general types. There are three types of sprockets, each with a hub style:

• Type A sprockets have no hub
• Type B sprocket has a hub on one side
• C-type sprocket has a hub on each side

What Is the Main Difference Between a Sprocket and a Pulley?

A sprocket is a toothed wheel that engages with a chain or track to transmit rotational motion and torque, typically in systems like bicycles or machinery. A pulley is a grooved wheel designed to guide or support a belt, rope, or cable, often used to transmit power or change the direction of force in systems like conveyor belts or lifting mechanisms. The main difference lies in their engagement: sprockets use teeth for positive drive with chains, ensuring no slip, while pulleys rely on friction with belts or ropes, which may allow slip under load.

Principle for Selecting the Number of Teeth of Chain Drive Sprockets

• Transmission ratio and speed:
  Match the number of teeth on the sprocket to achieve a reasonable speed conversion.
• Range of teeth:
  A small number of teeth is prone to cause the chain to elongate and reduce the accuracy. A large number of teeth reduces impact.
  The number of teeth on the small sprocket should not be too small to prevent chain wear. Excessive teeth on the large sprocket increase its size and weight.
• Dynamic performance:
  Avoid odd-numbered teeth and reduce dynamic loads.
  Avoid having a common divisor between the number of teeth and the number of chain links to prevent resonance.
• Power and Load Capacity:
  The number of teeth is selected based on the transmitted power. For heavy-duty transmission, the number of teeth is increased to enhance the load-carrying capacity
  When operating at high speed and under heavy load, increasing the number of teeth can improve the working conditions of the chain.

• Chain and Meshing:
  Ensure that the chain can be smoothly meshed in and out to prevent it from coming apart.
  Consider the chain model, specification, pitch error and elastic deformation.
• Transmission smoothness:
  The difference in the number of teeth between adjacent sprockets should not be too large to reduce uneven force distribution on the chain.
  Increasing the number of teeth reduces vibration and improves transmission accuracy.
• Noise and Lifespan:
  High-speed transmission increases the number of teeth to reduce noise.
  A reasonable number of teeth extends the fatigue life of the chain and reduces wear.
• Structure and Installation:
  Consider the installation space, the diameter of the sprocket and the system layout.
  Avoid increasing the bending stress of the chain by too many teeth.
• Efficiency and Cost:
  Take into account transmission efficiency, manufacturing process and cost.
  Select the number of teeth that conforms to the standardized series.
• Working condition adaptability:
  Low-speed transmission can reduce the number of teeth, while frequent starts and stops require careful selection.
  Consider the lubrication conditions, working environment and tension.
• Maintenance and Reliability:
  Select the number of teeth that is easy to maintain to ensure the reliability of the system.
  The number of teeth helps to extend the service life of the transmission system.

Sprockets in Australia

At GBC, we are proud to supply high-quality sprockets across Australia, serving industries ranging from mining and agriculture to manufacturing and logistics. Our sprockets are engineered for durability, precision, and performance, ensuring seamless operation even under the toughest conditions. With a wide range of standard sizes and custom solutions available, we meet the unique needs of businesses nationwide. Trust us for reliable sprockets crafted to keep your operations running smoothly. Experience the difference with our commitment to excellence, local support, and fast delivery across Australia.