How to judge the pros and cons of rubber oil seals

Qualified products should meet the following conditions: 1. The code mark on the end face is consistent with the needs. 2. The surface is smooth and smooth, without defects or deformation. 3. The shape of the rubber oil seal with the skeleton is correct, and the end face is a perfect circle. When placed on the glass plate, it should be in contact with the glass surface without disturbing the bending phenomenon. 4. The outer edge of the frameless oil seal should be straight, and the end surface should be flat. Hold it by hand to deform it, and it can return to its original shape after letting go. 5. The shape and thickness of the cutting edge should be the same on the entire circumference. When fitting with the matching parts, the cutting edge should be tightly fitted on the matching neck. 6. For the rubber oil seal with spring, the spring should be free of rust and deformation, and can be firmly stuck in the spring groove. Take 50*72*12 rubber oil seal as an example. Let the oil seal fall freely from a height of 1m. If the spring does not fall off more than once every 5 times, it can be considered that the spring and the oil seal cooperate well. 7. When distributors buy rubber oil seals in bulk, they can first take samples for oil immersion test to measure the quality change rate. For example, use 25 transformer oil for oil seal in (70±5) After soaking for 24 hours at a temperature of 100 degrees, the mass change rate should be between 3% and 5%. https://www.orksealing.com/