Global O-Ring and Seal

25 Nov.,2022


rubber oil seal

Oil Seal Overview

Oil seals, often called a rotary shaft seal or grease seal, closes the gap between stationary and moving components in mechanical equipment — most often rotating shafts — helping prevent lubricant escape and stopping harmful materials, such as dirt, from moving in through the clearance. Oil seals are most commonly used in gearboxes, hydraulic cylinders, and related components.


Oil Seal Part Number System

Global O-Ring and Seal’s oil seal part numbers are designed to describe the seal size, style, and material composition. When searching for oil seals via our online store, you will not only be presented with your selection but with comparable oil seals of the same dimensions. There are often viable style substitutions which are functionally compatible, but with additional features. With over 17,000 unique oil seals in our database, you can cross-reference 180,000 part numbers of OEMs and manufacturers. In the Search Bar above, simply type the OEM/manufacturer part number alone (no need to type the name), and the oil seals matching that part number will be displayed.

As an example, this oil seal has a Shaft Size of 4″, a Bore Size of 5.000″, a Width Size of .375″, a Style of TB2, and is made of Viton material. Conversely, the same size oil seal in Metric has a Shaft Size of 101.6 mm, a Bore Size of 127 mm, and a Width Size of 9.52 mm.

OS/MOS: Designates if dimensions are displayed in inches or millimeters.

Shaft, Bore, Width: Dimensions displayed are actual size, rather than nominal.

Style: 2-5 characters in length (see our style chart at the bottom for details).

Material: There are several material options. Nitrile (Blank) Viton (V), Silicone (S), EPDM (E), Carboxylated Nitrile (X), HNBR (H), Polyacrylate (P), and Teflon (T).