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  • 18x30x5mm Nitrile Rubber Rotary Shaft Oil Seal R23 / TC Style
  • 18x30x5mm Nitrile Rubber Rotary Shaft Oil Seal R23 / TC Style
18x30x5mm Nitrile Rubber Rotary Shaft Oil Seal R23 / TC Style
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18x30x5mm Nitrile Rubber Rotary Shaft Oil Seal R23 / TC Style


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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: 18mm
Outside Diameter: 30mm
Width: 5mm
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 Cto 120deg C. It also functions well under dry environment, but only for intermittent periods.
R23 / TC design cross section

Cross section of an R23 / TC style oil seal.

This is a double sealing lip seal arrangement with one primary sealing lip and a dust protection lip.

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

  • Erick Hickman, United Kingdom 05/10/2015

    5 of 5 Stars!
    Very good quality of oil seal, will use this company again! Highly recommended!

  • Reuben Sanford, United Kingdom 22/05/2015

    5 of 5 Stars!
    Seal delivered quickly and and at a great price too. Will definitely be back to order from you again soon. Thanks

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18x30x5mm Nitrile Rubber Rotary Shaft Oil Seal R23 / TC Style

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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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