The Circlip Shaft Internal Snap Retaining ring can be reused repeatedly under normal usage. Then maintenance and inspection will extend the service life of the product.
(1)Appearance deformation
Whether the overall shape of the Circlip Shaft Internal Snap Retaining ring is distorted or warped
Acceptance criteria: The flatness meets the standard, and there is no visible warping under visual inspection
(2)Elastic recovery
Does it fit tightly against the bottom of the shaft groove after installation?
Acceptance criteria: The Circlip Shaft Internal Snap Retaining ring should be able to fully return to its position without any looseness or gap.
(3)Pliers hole wear
Whether the pliers hole is deformed or cracked
Acceptance criteria: The pliers hole is intact, without enlargement or cracks
(4)Sharp edge condition
Whether the sharp edge is worn or dulled
Acceptance criteria: The edge should be sharp and intact
| Mon | Φ3 | Φ4 | Φ5 | Φ6 | Φ7 | Φ8 | Φ9 |
| h max | 0.4 | 0.4 | 0.6 | 0.7 | 0.8 | 0.8 | 1 |
| h min | 0.35 | 0.35 | 0.55 | 0.65 | 0.75 | 0.75 | 0.94 |
| d max | 2.74 | 3.74 | 4.74 | 5.64 | 6.56 | 7.46 | 8.46 |
| d min | 2.55 | 3.55 | 4.55 | 5.45 | 6.32 | 7.22 | 8.22 |
| d1 min | 1 | 1 | 1 | 1.2 | 1.2 | 1.2 | 1.2 |
| b1 max | 1.9 | 2.2 | 2.5 | 2.7 | 3.1 | 3.2 | 3.3 |
(5)Surface corrosion
Presence of rust or oxidation (especially in humid environments)
Acceptance criteria: Surface free of red rust or severe oxidation
(6)Fatigue resistance verification
There should be no cracks on the surface, and the elasticity and hardness must comply with the design standards.
Passing criteria: Conduct random inspections of elasticity and hardness of sample pieces for each batch.
(7)Groove inspection
The retaining force of the lock ring depends on the grooves on the shaft. During each maintenance, it is necessary to check whether the grooves are worn, enlarged, or have chamfered edges.
(8)Cleaning Requirements
Before each installation, thoroughly clean the shaft groove to ensure there is no oil residue, rust debris, or metal fragments.
(9)Is lubrication required?
Standard Circlip Shaft Internal Snap Retaining ring form a locking force through the spring action after installation. Usually, no additional lubrication is necessary. In cases where torque requirements exist, whether to use lubrication should be determined based on the assembly process.
(10)Check the torque and tightening condition.
For shaft systems that experience frequent vibrations or heavy loads, it is recommended to conduct regular inspections of the positioning of the Circlip Shaft Internal Snap Retaining ring in the grooves and the axial clearance to ensure there is no loosening or displacement.