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  • 9x22x7mm Nitrile Rubber Rotary Shaft Oil Seal with Garter Spring R21 / SC
  • 9x22x7mm Nitrile Rubber Rotary Shaft Oil Seal with Garter Spring R21 / SC
9x22x7mm Nitrile Rubber Rotary Shaft Oil Seal with Garter Spring R21 / SC
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9x22x7mm Nitrile Rubber Rotary Shaft Oil Seal with Garter Spring R21 / SC

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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.

Brand / Quality: Simply NBR Seals - High Quality
Inside Diameter: 9mm
Outside Diameter: 22mm
Width: 7mm
Shaft Size not Inside Diameter (d)
Outside Diameter (D)
Width (b)
Oil Seals
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.
R21 / SC design cross section

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

Viton Chemical Resistance

  • Hayden Dallas, United Kingdom 18/12/2019

    5 of 5 Stars!
    Very easy to use website unlike some others I've used, Found the oil seals I needed with no trouble at all. Delivered next day even though I'd only opted for free post. Great stuff.

  • Coleman Rawlings, United Kingdom 25/09/2019

    5 of 5 Stars!
    Using the website to find my required oil seals was a simple and quick process, thank you.

  • Ricky Whitney, United Kingdom 20/07/2015

    5 of 5 Stars!
    Great product delivered quickly. Will be sure to recommend your website to friends as the service has been brilliant. Thanks again.

  • Beckham Banks, United Kingdom 05/06/2015

    5 of 5 Stars!
    Just had to let you know of a great experience I've had ordering through your website. Found the seal pretty quickly on your website using the drop down boxes. Received the order within 24 hours and it's just what I was after. Will be definitely ordering with you in the future. Thank you.

  • Jase Aiden, United Kingdom 04/01/2015

    5 of 5 Stars!
    Great quality nitirile seal, Thanks again for your advise, your website is fantastic. I found it really easy to find things and the most important thing it was in stock and I got it the next day. Thanks alot simply bearings for getting my job going again. See you soon

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9x22x7mm Nitrile Rubber Rotary Shaft Oil Seal with Garter Spring R21 / SC

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Simply bearings are the UK's largest online retailer of bearings, seals, belts, chains, sprockets, lubricants and other associated power transmission equipment.
Simply Bearings Ltd, Halton House, Greenfold Way, Leigh
Greater Manchester
United kingdom

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