O Ring Slot Dimensions

O-ring Size Charts Note: The AS O-ring Size Chart has a column that shows the Nominal Size along-side the Actual Size. Originally the nominal size was just for a listing of the approximate fractional dimensions of the O-ring. Prior to the common use of dial calipers many people called out a 1 inch by 1-1/4 rt = O-ring, this was a dash -214. O-Ring Size AS568A-W Cross Section Nominal Actual L Gland Depth Squeeze% G Groove Width (To sharp corner) R R 1 004 through 050 1/16.070 ±.003.053 to.055 23. On O-ring drive belts and their application will be found in O-Ring Applications, Section III. 1.2 What is an O-Ring Seal? An O-ring seal is used to prevent the loss of a fluid or gas. The seal assembly consists of an elastomer O-ring and a gland. An O-ring is a circular cross-section ring molded from rubber (Figure 1-1). Typical dimensions of an O-ring are internal dimension (id), outer dimension (od) and thickness / cross section (cs) Metric O-rings are usually defined by the internal dimension x the cross section.

An o-ring is contained in a gland and forced to flow into the surface imperfections of the glands and any clearance gaps available to it. An o-ring can perform sealing by means of squeeze under low pressure conditions. The extent of extrusion depends upon the hardness of o-ring, the pressure, and the size of the clearance gap.

O-ring groove design for non-circular groove

O-ring Groove Dimensions Static

O-ring groove design for non-circular groove

O Ring Groove Dimensions Roymech