12x21x4mm R21/SC Single Lip Nitrile Rotary Shaft Oil Seal with Garter Spring

In stock
SKU: 12x21x4-R21
Single lip nitrile rubber metric rotary shaft oil seal with garter spring 12mm inside x 21mm outside x 4mm wide.
Regular price £1.68 inc.VAT
£1.40 exc.VAT
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Product details

  • SKU 12x21x4-R21
  • Inside diameter (d) 12mm
  • Outside diameter (D) 21mm
  • Width (B) 4mm
Seals are ideal for excluding dirt, dust, water or any other contaminant whilst retaining lubricant in rotary shaft equipment. They are generally used as a means of protecting the bearings of rotating shafts.

The term nitrile rubber is used for acrylonitrile-butadiene rubber (NBR). This material has very good engineering properties and is a general-purpose sealing lip material. It is a copolymer manufactured from acrylonitrile and butadiene that provides good resistance to the following media:

Most mineral oils and greases with a mineral oil base
Normal fuels like gasoline, diesel and light heating oils
Animal and vegetable oils and fats and hot water