Cast polyamide gears are power transmission components manufactured from engineering plastics and are preferred in mechanical systems where low weight, quiet operation, corrosion resistance, and favorable friction characteristics are important. They can provide an effective alternative in many industrial applications where metal gears are not required and operating conditions are suitable for engineering plastics.

At Erdişli Makina, we manufacture cast polyamide gears for various machinery and production systems based on technical drawings, existing samples, and application-specific operating conditions.

We manufacture custom-sized cast polyamide gears in spur, helical, and special geometries for new machinery, maintenance, overhaul, and spare-part requirements.

What Is Cast Polyamide?

Cast polyamide is an engineering plastic based on cast nylon, commonly known as PA6G (Cast Nylon 6). It is widely used for manufacturing industrial machine components due to its mechanical strength, wear characteristics, low weight, and machinability.

In addition to gears, cast polyamide can be used to manufacture bushings, rollers, guides, bearing components, and various machinery spare parts.

Its significantly lower density compared with metals can provide an advantage in mechanical systems where reducing the weight of moving components is important.

What Is a Cast Polyamide Gear?

A cast polyamide gear is a mechanical power transmission component machined from cast polyamide material instead of metal.

In systems where operating loads and temperatures are within suitable limits, it can be used as an alternative to steel, bronze, or other metal gears.

The vibration-damping characteristics of cast polyamide can also help reduce operating noise, making these gears particularly suitable for machinery and mechanisms where quieter operation is desired.

However, cast polyamide gears should not be considered a direct replacement for metal gears in every application. Factors such as load, rotational speed, temperature, humidity, chemical exposure, and operating duration must be evaluated together when selecting the material.

Erdişli Cast Polyamide Gear Manufacturing

In cast polyamide gear manufacturing, not only the tooth geometry but also the behavior of the material under operating conditions must be considered.

Depending on the application, technical parameters evaluated before manufacturing include:

• Gear type

• Module

• Number of teeth

• Face width

• Outside diameter

• Shaft bore

• Hub design

• Keyway

• Rotational speed

• Transmitted load

• Operating temperature

• Environmental conditions

• Mating gear material

Based on these parameters, we manufacture custom cast polyamide gears for various machinery and mechanical systems.

Advantages of Cast Polyamide Gears

When used in suitable applications, cast polyamide gears can provide several advantages compared with metal gears.

Key advantages include:

• Low weight

• Quiet operation

• Vibration-damping characteristics

• Good wear properties

• Favorable friction characteristics

• Corrosion resistance

• Good machinability

• Electrical insulation properties

• Suitable operating characteristics against metal surfaces

• Manufacturing flexibility in various dimensions

• Adaptability to custom machinery applications

• Suitability for maintenance and spare-part applications

Particularly in systems where reducing operating noise and the weight of moving components is important, cast polyamide gears can provide an effective solution.

Quiet Operation

One of the main reasons for selecting cast polyamide gears is their potential to provide quieter operation compared with metal gears.

Unlike metal-to-metal contact, which can generate significant vibration and operating noise, the structure of polyamide-based materials can help absorb some of these vibrations.

This characteristic can make cast polyamide gears particularly suitable for machinery operating near personnel, packaging systems, automation equipment, and other mechanisms where reduced operating noise is desirable.

Low Weight

Cast polyamide has a significantly lower density than steel and many other metals.

As a result, a cast polyamide gear can be considerably lighter than a metal gear of similar dimensions.

Reducing the weight of moving components can help decrease the overall mass and rotational inertia of a system in certain applications.

This can be particularly advantageous in fast-moving mechanisms or machinery designs where overall weight is an important consideration.

Corrosion Resistance

Unlike conventional metal gears, cast polyamide does not rust.

This characteristic can provide an advantage in humid operating environments or certain mechanical systems where contact with water may occur.

However, polyamide-based materials can absorb moisture, which may affect their dimensional characteristics.

For this reason, environmental humidity and temperature should be considered during the design and manufacturing stages, particularly in applications requiring high dimensional accuracy.

Use with Metal Gears

Depending on application requirements, cast polyamide gears can also operate together with metal gears.

For example, pairing a steel pinion with a cast polyamide gear may help reduce operating noise and manage wear between mating surfaces in certain systems.

However, because the mechanical properties of these materials differ, factors such as load distribution, tooth geometry, and operating temperature must be carefully considered.

Proper material pairing contributes to more reliable operation and longer system service life.

Types of Cast Polyamide Gears

Depending on the technical requirements of the application, various gear geometries can be manufactured from cast polyamide.

These may include:

• Cast polyamide spur gears

• Cast polyamide helical gears

• Cast polyamide sprockets

• Cast polyamide custom-profile gears

• Cast polyamide machinery spare parts

The appropriate gear type and dimensions are determined according to the operating conditions and technical requirements of the machinery.

Manufacturing from Technical Drawings or Samples

We manufacture cast polyamide gears according to technical drawings as well as from existing component samples.

Plastic gears used in machinery operating for many years may eventually wear, break, or become deformed.

When the original replacement part is unavailable, the dimensions and tooth geometry of the existing component can be evaluated to manufacture a new cast polyamide gear.

Sample-based manufacturing provides an effective solution particularly for:

• Older machinery

• Imported machinery

• Packaging equipment

• Production lines

• Custom-designed machinery

• Systems with unavailable spare parts

• Maintenance and overhaul operations

Applications of Cast Polyamide Gears

Cast polyamide gears can be used in various industrial applications involving low to moderate mechanical loads, particularly where reduced operating noise or corrosion resistance is important.

Typical applications include:

• Packaging machinery

• Food processing machinery

• Conveyor systems

• Automation systems

• Textile machinery

• Filling machines

• Labeling machinery

• Production lines

• Material handling systems

• Agricultural machinery

• Machinery manufacturing

• Light-duty mechanical drive systems

• Custom machinery and equipment

What Should Be Considered When Selecting a Cast Polyamide Gear?

Although cast polyamide gears offer significant advantages, the operating limits of the material must be taken into consideration.

Important factors in gear selection and manufacturing include:

• Transmitted load and torque

• Rotational speed

• Gear diameter

• Module

• Number of teeth

• Face width

• Operating temperature

• Environmental humidity

• Exposure to chemicals

• Continuous or intermittent operation

• Mating gear material

• Shaft and hub connection

• Dimensional accuracy requirements

For applications involving high temperatures, high torque, or severe impact loads, suitable metal gear materials may be more appropriate than cast polyamide.

Custom Cast Polyamide Gear Manufacturing

For applications where standard products are not suitable, we provide custom cast polyamide gear manufacturing.

The outside diameter, module, number of teeth, width, hub design, shaft bore, keyway, and other technical specifications can be customized according to application requirements.

In addition to manufacturing new components from technical drawings, we can reproduce plastic gears that are no longer commercially available using existing parts as samples.

Cast Polyamide Gear Manufacturing for Maintenance and Overhaul

Plastic gears can become worn or damaged as a result of prolonged operation, excessive loads, high temperatures, or mechanical problems within the system.

Particularly in older or imported machinery, sourcing the original plastic gear may be difficult or impossible.

By using the existing component as a sample, a new cast polyamide gear suitable for the machinery can be manufactured.

This can make it possible to replace the required component instead of replacing the entire mechanism.

Why Erdişli Makina?

With experience in machine gear and spare-part manufacturing since 1987, we provide custom gear solutions manufactured not only from metals but also from various engineering materials.

Our ability to manufacture according to technical drawings or existing samples enables us to support new machinery projects as well as maintenance, overhaul, and spare-part requirements.

In cast polyamide gear manufacturing, we evaluate tooth geometry, operating loads, mating component characteristics, and material behavior under actual operating conditions to provide application-specific solutions.

For cast polyamide gears, plastic gears, custom-sized cast polyamide gears, or replacement plastic gears manufactured from existing samples, contact Erdişli Makina.