Internal Gears

Standard Materials
Steel (En32)
Delrin

Outside Diameter
Max : 300mm
Min : 50mm

Pitches
0.25mod – 1.5mod
64DP – 16DP

Pressure Angle
20°

We can manufacture a non standard part per drawing or with a Technical Request Form

Internal gears are essential components in mechanical systems where precise power transmission and compact gear arrangements are required. Unlike external gears, internal gears have teeth cut on the inside of the gear, which allows for unique configurations and enhanced performance in certain applications. These gears are widely used in systems like planetary gear sets, where they mesh with external gears or pinions, providing reliable, efficient, and smooth movement.

Standard Materials for Internal Gears

The materials used in the manufacturing of internal gears play a crucial role in their performance, durability, and resistance to wear. Common materials for internal gears include:

• Steel (En32): Steel is known for its strength and durability, making it an excellent choice for high-load applications.
• Delrin: A strong and wear-resistant plastic material, Delrin is often used for internal gears in applications that require quieter operation and less friction.

These materials ensure that the internal gears can handle high pressures and heavy loads while maintaining long-lasting performance.

Size and Specifications

Internal gears are available in a range of sizes to meet different application requirements:

• Outside Diameter:
  • Maximum: 300mm
  • Minimum: 50mm
• Pitches:
  • 0.25mod – 1.5mod or 64DP – 16DP (Diametral Pitch). The pitch determines the spacing between teeth, which is crucial for ensuring the internal gear meshes properly with other gears in the system.
• Pressure Angle: The standard pressure angle for internal gears is 20°, which is essential for determining the gear’s tooth geometry and how the load is transmitted between meshing gears.

Types of Internal Gears

There are different types of internal gears available, allowing for flexibility in various applications:

• Plain Internal Gears: These gears have simple, straight-cut teeth and are typically used in applications where efficiency and durability are the primary concerns.
• Spigot Type Internal Gears: These gears feature an additional spigot (or boss) which provides extra support and can be used in applications where higher torque or load-bearing capabilities are required.

Both types of internal gears can be tailored to meet specific requirements, such as altering the size, number of teeth, or adding additional features like keyways or tapped holes.

Custom Manufacturing

For applications requiring unique specifications, we can manufacture non-standard internal gears based on your drawing or a Technical Request Form. This allows us to provide gears that are perfectly suited to your application’s requirements, ensuring optimal performance and efficiency.

Metric and Imperial Sizes

Internal gears are available in both Metric and Imperial sizes, making them versatile and suitable for use in a wide range of mechanical systems, regardless of the measurement system used.

Applications of Internal Gears

Internal gears are commonly used in applications where space is limited, and high precision is required. Some common uses include:

• Planetary Gear Systems: Internal gears are a key component in planetary gear sets, which are used in various machinery, including automotive transmissions and robotics.
• Automated Machinery: Internal gears are used in industrial machinery and automated systems that require compact and efficient power transmission.
• Reduction Gears: Internal gears are often employed in reduction gears, where high torque and precise speed control are needed.

Conclusion

Internal gears are an essential part of many mechanical systems, providing smooth, reliable, and efficient power transmission in compact arrangements. With materials like Steel (En32) and Delrin, internal gears offer both strength and durability for a wide range of applications. Available in various sizes, pitches, and pressure angles, they can be customized to meet your specific needs. Whether you require plain or spigot type internal gears, we can produce gears that are tailored to your requirements. With the flexibility to create non-standard parts through Technical Request Forms, internal gears are adaptable to a variety of industries and applications, ensuring that your mechanical systems run smoothly and efficiently.