Plastic rack application

The rack design must be carefully considered in the plastic rack and pinion applications to ensure the highest load-carrying capacity and reduce frictional heat.
For circular racks, the teeth of the gear are cut on the rod so that the gear rolls on it when stationary. These racks are generally weaker than rectangular racks and therefore require careful design. They should be installed with sleeve bearings or other supports as they are unsuitable for continuous rotation.
The shrinkage of plastic gears depends on the molding process, material, ambient temperature, and time. This ratio is usually expressed as a percentage. For example, a plastic gear with shrinkage of 0.022 mm/mm has a pitch diameter of 50 mm in the mold but shrinks to 1.1 mm after molding and cooling.
The benefits of plastic racks are many. They can be heat treated for extra strength, self-lubricating, and lightweight. They are durable, but only if installed in the right environment. Some materials may be detrimental to their durability and performance, such as acetal, which is known to be prone to voids. Other materials, such as nylon, cannot maintain dimensional accuracy when subjected to changes in temperature and humidity.


Q1. When can I get the price?

A: We usually quote within 24 hours after receiving your inquiry. If you are urgent, Please call us or let us know in your email so we can prioritize your inquiry.

Q2. How long is the lead time for the mold?

A: It all depends on the size and complexity of the mold. Usually, the delivery time is 25-35 days. If the mold is simple and insignificant, we can do it within 15 days.

Q3. I don’t have drawings; how should I start a new project?

A: You can provide us with samples, and we will help complete the drawing design.

Q4. How to ensure product quality before delivery?

A: If you do not come to our factory and there is no third-party inspection, We will be your inspector. We will give you a video with details of the production process, including process reports, product dimensions, structural and surface details, packaging details, etc.

As a plastic gear rack and plastic gear supplier, we always aim to provide the highest quality products and the most comprehensive services and look forward to cooperating with you.

Additional information