Hole elastic retaining ring production standard inspection and characteristics of the role of industrial solutions

A hole retaining ring installed in the hole is used to fix the axial movement of the parts; the outer diameter of this type of retaining ring is slightly larger than the diameter of the assembly hole. Installation must use the spring pliers; the jaws will be inserted into the hole of the retaining ring, clamping the retaining ring to put it into the pre-processed round hole groove. Hole elastic retaining ring, also known as hole with the spring, hole with the block card, or hole with the ring, is installed in the hole and is used to fix the axial movement of the parts; this type of retaining ring outer diameter than assembly of the diameter of the round hole is slightly larger. Installation must use the spring pliers, which will be inserted into the jaws of the retaining ring of the jaw hole, clamping the retaining ring to put it into the pre-processed round hole groove. There are two main types of retaining rings: elastic retaining rings for holes and elastic retaining rings for reverse holes. The hole elastic retaining ring DIN472 is for fixed parts in the hole with the elastic retaining ring. The hole diameter specifications are generally 8-200mm for ordinary hole retaining rings and 20-100mm for heavy-duty hole retaining rings. The visible hole retaining ring, according to the thickness of the retaining ring, is divided into standard and thickened heavy. Please specify the specific type, thickness, and size when requesting a quotation.

Regarding the shape of elastic retaining rings for holes - rounded and right-angled type, by DIN472, the specific style is not accepted. The material should be spring steel; refer to DIN EN 10132-4; the primary spring steel material is C60, and so on. Stainless steel is usually 1.4122 to maintain the performance of the product.

1. The hardness of elastic retaining rings for holes is as follows:

Specification for not more than 48mm: 470HV-580HV

48mm＜d≤200mm : 435HV-530HV

200mm <d1≤300mm : 390HV-470 HV

For conversion of hardness units, please refer to DIN EN ISO 18265.

2. Surface treatment of shaft retaining rings:

The surface of elastic retaining rings for spring steel holes is generally blackened and oiled. Due to the deformation that must occur when the ring is mounted, zinc plating (risk of hydrogen embrittlement) and non-electrolytic zinc flake coatings (flaking of coatings) on the surface are rare, and the selection of shaft retaining rings with plating is not recommended.

3. Regarding the hole with the elastic retaining ring inspection, our company is conducting a hardness and bending test.

Bending test: the retaining ring should not have cracks in the bending part after bending.

Hardness test: refer to the relevant standards.

Elasticity test: Clamp the hole retaining ring with positioning pliers, reduce the outer diameter to 0.99d, and then relax five times in a row. After the test, measure the outer diameter. The outer diameter of the hole retaining ring after the test should be not less than the maximum value of the groove diameter. Sewing gauge check: Put the retaining ring into the sewing gauge. The ring should be able to pass freely.

4. Characteristics of the elastic retaining ring for holes

The elastic retaining ring for the hole is a simple and practical axial connection element commonly used to connect the shaft and hole of mechanical equipment. Its main features are high elasticity and wear resistance, which can alleviate the effects of axial and radial forces within a specific range and reduce the impact and vibration in motion. At the same time, it can also effectively prevent the loosening or vibration between the shaft and the hole to ensure the regular operation of mechanical equipment.

5. Role of elastic retaining ring for hole

The role of an elastic retaining ring for the hole is mainly to connect the shaft and hole and buffer and stabilize the movement process. When mechanical equipment is operated, the axial and radial forces will affect the shaft and hole, resulting in the gap between the shaft and hole producing loose or vibration, thus affecting the regular operation of mechanical equipment. Using elastic retaining rings for holes can effectively reduce these adverse effects and extend the service life of mechanical equipment.

6. Selection and installation of elastic retaining ring for hole

When selecting elastic retaining rings for holes, it is necessary to determine the appropriate models and specifications according to the diameter of shafts and holes, rotational speed, load, and other parameters. Generally speaking, the installation sequence of the elastic retaining ring for the hole is to install on the shaft first, insert the shaft into the hole, and then push the retaining ring to the end. When installing, attention should be paid to the sealing direction of the retaining ring to avoid reverse installation or wrong connection. At the same time, attention should also be paid to the amount of stretching of the retaining ring during installation, which should be adjusted to the appropriate position according to the actual situation.

Using elastic retaining rings for holes in mechanical equipment can effectively prevent loosening or vibration between the shaft and the hole and extend the service life of mechanical equipment.

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