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
GERRY EDE UNITED KINGDOM 03/07/2019
Great quality product and fantastic service. I’ve been able to complete my art project without spending too much money thanks to Simply Bearings.
Angel Deandre, United Kingdom 29/11/2017
arrived within a couple days.. thanks
Assunta Margaret, United Kingdom 17/06/2016
Good quality seals arrived quickly. Will be back to order more from you soon as the service has been brilliant. Thank you.
Ian Heywood, United kingdom 06/03/2015
Got exactly what I ordered - which is always good - I've no reason to doubt that they are good quality but of course only time will tell on that.
Delivery was super fast and of course free postage is always a bonus. I will certainly be ordering again from this vendor.