How much do you know about the design knowledge of the groove shape of the O-ring? Let's follow the Cheap moulded rubber o-rings editor for a simple understanding!
Rectangular grooves are the most commonly used groove shapes for O-rings used in hydropneumatics. The advantage of this kind of groove is that it is easy to machine, and it is convenient to ensure that the O-ring has the necessary compression. In addition to rectangular grooves, there are also V-shaped, semicircular, dovetail and triangular grooves.

The cross-sectional shape of the triangular groove is an equilateral right-angled triangle with M as a right-angled side. The cross-sectional area is about 1.05 to 1.10 times the cross-sectional area of the O-ring. The design principle is that the nominal size of the inner diameter of the O-ring seal is equal. The sealing groove can be opened on the shaft or the hole; for axial sealing, the groove is opened on the plane.
The above is the editor of Cheap moulded rubber o-rings: a brief introduction to the knowledge of groove shape design of O-rings.