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  • 14x22x4mm Nitrile Rubber Rotary Shaft Oil Seal R21 / SC
  • 14x22x4mm Nitrile Rubber Rotary Shaft Oil Seal R21 / SC
14x22x4mm Nitrile Rubber Rotary Shaft Oil Seal 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: 14mm
Outside Diameter: 22mm
Width: 4mm
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

  • Liam Johnson, United kingdom 19/12/2019

    5 of 5 Stars!
    Been looking for thiese oil seals for a long time, wish i had found your service sooner, excellent service

  • Joe Fabian, United Kingdom 26/09/2019

    5 of 5 Stars!
    The seals i ordered arrived the next day, packaged and delivered in perfect condition.

  • Branson Davenport, United Kingdom 10/07/2015

    5 of 5 Stars!
    Thank you for delivering the seals so quickly. Only really needed to order 1 but ordered a couple as the price was so agreeable. Will be sure to recommend you and to order from you again in the future.

  • Dylan Rene, United Kingdom 07/07/2015

    5 of 5 Stars!
    Very good service from this company first time I have ordered on line and I am not disappointed arrived day after and are very good quality and price. Thankyou

  • Micheal Johns, United Kingdom 08/06/2015

    4 of 5 Stars!
    Quality seal delivered, have ordered a couple as spares as the price was so good. Will be sure to order from you again in the future as the service has been fantastic. Thank you.

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14x22x4mm Nitrile Rubber Rotary Shaft Oil Seal 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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