Oil Seals: Designed to aid trouble-free operation of your equipment, providing an excellent barrier against the escape of oils and greases and preventing the ingress of foreign matter. Benefits: Excellent wear resistance, good running properties, high resistance to chemicals and petroleum based fuels including petrol, diesel and LPG.
An oil seal normally consists of three basic components: The Sealing Element (the nitrile rubber part), the Metal Case, and the Spring. It is a widely used sealing component. The function of a seal is to prevent the leakage of medium along the moving parts. This is mainly achieved by the sealing element. Nitrile Rubber (NBR)
NBR is the most commonly used seal material. It has good heat resistance properties, good resistance to oils, salt solutions, hydraulic oils, and gasoline. Operation temperatures are recommended from -40deg C to 120deg C. It also functions well under dry environment, but only for intermittent periods.
Cross section of an R21 / SC style oil seal.
This is a single sealing lip seal arrangement.
The seal cases are made from SAE 1008-1010 Carbon Steel and are often coated in a very thin layer of Nitrile rubber to assist sealing in the housing.
The principle function of the metal case is to impart rigidity and strength to the seal.
The spring is made from SAE 1050-1095 Carbon Spring Steel which has a protective zinc coating.
The principle function of the spring is to maintain an even gripping pressure around the shaft
Camden Donovan, United Kingdom 19/12/2019
I was nervous about buying the incorrect oil seals however, I called Simply Bearings and was treated really well and professionally.
Abel Reilly, United Kingdom 01/10/2019
My seals arrived today, within 48 hrs of ordering on a free delivery. They are really good quality and considerably cheaper than my local motor factors. Total satisfaction.
Kellen Jayce, United Kingdom 08/03/2018
Clearly packaged. Especially when you order a large number of different sizes all to be used at separate times. Well done Simply.
Luka Campbell, United Kingdom 01/02/2017
Very Good service, will continue to use Simply Bearings.