Small Rotary Damper | How to Use & Select Dampers | TOK, Inc.

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Although the operating principle of rotary dampers is the same regardless of size, the designer&#;s experience and competence can be important when using a small rotary damper. Specifically, it is the design capability to identify the compatibility between the small rotary damper and the relative components, and there is essential point to the usage and selection method.

When we hear from designers who are considering the use of rotary dampers, many of them think as below.

&#;I want the lid to close slowly, but I want to find a rotary damper that is as small as possible so that the appearance of the product will not be significantly altered by the mounting of the rotary damper. &#;

We understand your thought very well, but there may be a slight problem with this approach. This is because there are advantages and disadvantages associated with small size.

In this article, we would like to provide you with information on how to choose small rotary dampers.

The advantage of small rotary dampers is that they are &#;small&#; and unlikely to spoil the overall appearance of the product in which the rotary damper is mounted. A small component also reduces the possibility of a large hinge design, resulting in a cleaner appearance.

Another advantage specific to our small rotary dampers is that the color tone is less noticeable after mounting. Two color tones are gray and natural plastic color. Generally, rotary dampers are embedded inside the product and are easily invisible from the customer&#;s product exterior, but even if they are visible through gaps in the product, they are not noticeable because the rotary damper color is gray. However, since the gray color stands out on white color products, a natural color (white color) version is also available.

Furthermore, there are advantages to the relative parts. Since the rotary damper is small, the mating parts for mounting can also be small in shape, which may reduce the parts production cost.

Disadvantages of choosing small rotary dampers

Strength is a disadvantage when selecting a small rotary damper. As you know, torque is determined by the product radius and the working force, so if high torque is required, rotary dampers need to increase the outer diameter or increase the damping force while maintaining a small diameter.

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When downsizing, a stopper shape that can withstand damper torque and the weight of the mating parts is required, but a plastic rotary damper may crack when it is used as high torque specifications. To achieve high torque without increasing the size of the rotary damper, we should change materials from plastic to die-cast parts, but even if the rotary damper can be made to high torque specifications, it will be meaningless if it relative part cracks due to insufficient strength of the mating parts. Even if the strength of the mating part can be secured, the design of the mating part (tolerance range) must be precise so that the shape will not collapse due to repeated exposure to damper torque or radial load. Both increased material strength and increased component precision are factors that increase the cost of your product, and in the end, the balance between quality and cost is often lost and mass production is not achieved. Therefore, we believe that downsizing more than necessary should be avoided.

Against this background, we offer a lineup of small rotary dampers made of plastic with an outer diameter of φ11 mm and a maximum set torque of 0.29 N&#;m (3 kgf&#;cm).

Three ways to select small rotary dampers

The next thing to consider after avoiding high torque specifications and considering a small rotary damper with a maximum torque of 0.29 N&#;m (3 kgf&#;cm) or less is the selection of a rotary damper that matches the way the lid closes. Although it is possible to manufacture a rotary damper to special order specifications, producing only the required number of rotary dampers will increase the unit price and require initial investment such as mold fabrication. Therefore, we introduce three types of small rotary dampers that we sell as our standard products.

Small rotary dampers for lids that close horizontally

TD73 is the best choice for lids that close horizontally. TD73 is a rotary damper that exerts high torque about 30° before the lid closes horizontally and closes slowly. Its inconspicuous gray exterior does not interfere with the design of the product in which it is mounted. Torque variations of 0.05/0.10/0.20/0.29 N&#;m are available, allowing selection according to the weight of the lid. In addition, while the stopper shapes of the fixed and movable sides of a typical rotary damper are often different, TD73 has the same stopper shape on both sides, so depending on usage, there is no need to restrict the insertion direction, allowing for easy and quick assembly. This best-selling product with annual sales of more than 1 million units is used in a wide range of industries.

Small rotary dampers for heavy lids that close horizontally or lids close at an angle

If you are looking for more details, kindly visit Household Appliance Closing Devices exporter OEM.