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Rotary Seals

How to find the correct Rotary Shaft Seal...

You can browse through the most common sizes of rotary oil seals available by using the table below;

or, if you already know the exact size of seal required, you can enter the size in the search box above - use the following format:-

outside diameter, followed by inside diameter, followed by width, each separated by an "x" with no-spaces..
eg.. 89x53x13 or 3.1/2x2.3/4x1/2

  Browse R23 metric and imperial seals, with...
INTERNAL DIAMETER {Shaft Dia} between..
    Browse R23 metric and imperial seals, with..
OUTSIDE DIAMETER {Housing Dia} between..
 
6 to 12 mm, (¼ to ½ inch)
12 to 19 mm, (½ to ¾ inch)
19 to 25 mm, (¾ to 1 inch)
25 to 31 mm, (1 to 1¼ inch)
31 to 38 mm, (1¼ to 1½ inch)
38 to 44 mm, (1½ to 1¾ inch)
44 to 50 mm, (1¾ to 2 inch)
50 to 57 mm, (2 to 2¼ inch)
57 to 63 mm, (2¼ to 2½ inch)
63 to 70 mm, (2½ to 2¾ inch)
70 to 76 mm, (2¾ to 3 inch)
76 to 89 mm, (3 to 3½ inch)
89 to 114 mm, (3½ to 4½ inch)
114 to 292 mm, (4½ to 11½ inch)
   
12 to 31 mm, (½ to 1¼ inch)
31 to 38 mm, (1¼ to 1½ inch)
38 to 44 mm, (1½ to 1¾ inch)
44 to 50 mm, (1¾ to 2 inch)
50 to 57 mm, (2 to 2¼ inch)
57 to 63 mm, (2¼ to 2½ inch)
63 to 76 mm, (2½ to 3 inch)
76 to 89 mm, (3 to 3½ inch)
89 to 101 mm, (3½ to 4 inch)
101 to 133 mm, (4 to 5¼ inch)
133 to 292 mm, (5¼ to 11½ inch)
                                                                                                                                                                                                      

David Harries & Co can quickly source seals from a vast range of standad, specialist and non-standard size ans variants. If you can not find the exact product you need from the lists on this website, please contact our knowledgeable staff by any of the methods on our "contact us" page and we will do our very best to help.

Although there are thousands of variants, a common rotary oil seal normally consists of three basic components:The Sealing Element (commonly made of nitrile rubber), the Metal Case, and the Spring.
The function of a seal is to prevent the leakage of medium (oil, grease or other fluids) along the moving parts. This is mainly achieved by the sealing element - Nitrile Rubber (NBR)

Nitrile Rubber (NBR) has good heat resistance properties, good resistance to oils, salt solutions, hydraulic oils, petrol, diesel and other gasoline products. Operation temperatures are recommended from -40deg C to 120deg

R23 / TC style Oil Seal

This is a double sealing lip seal arrangement with one primary sealing lip and a dust protection lip.
Designed to aid trouble-free operation of equipment, providing an excellent barrier against the escape of oils and greases and preventing the ingress of foreign matter.
Benefits include excellent wear resistance, good running properties, high resistance to chemicals and petroleum based fuels including petrol, diesel and LPG.

Common uses include:-

Agricultural equipment
Motor cycle forks
Agricultural, pumps, mining
Rail and transport use, Electric motors, Wheels
General engineering applications
Marine, Shipping, Automotive

R23 / TC style Oil Seal - photo

R23 Construction

The seal cases can be made from Carbon Steel, Stainless Steel or Aluminium and are 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.

R23 / TC style Oil Seal - info

Nitrile (NBR)

Nitrile, chemically, is a copolymer of butadiene and acrylonitrile. Acrylonitrile content varies in commercial products from 18% to 50%. As the nitrile content increases, resistance to petroleum base oils and hydrocarbon fuels increases, but low temperature flexibility decreases. Due to its excellent resistance to petroleum products, and its ability to be compounded for service over a temperature range of -35°C to +120°C (-30°F to +250°F), nitrile is the most widely used elastomer in the seal industry today. Also many military rubber specifications for fuel and oil resistant O-rings require nitrile based compounds. It should be mentioned that to obtain good resistance to low temperature, it is often necessary to sacrifice some high temperature resistance. Nitrile compounds are superior to most elastomers with regard to compression set, tear, and abrasion resistance.

  COMMON TYPES OF ROTARY SHAFT SEAL PROFILES
(and a selection of manufacturers' and suppliers' alternative reference codes)
R23 Rotary Shaft Seal - Rubber covered case single lip with wiper
R21 Rotary Shaft Seal - Rubber covered case single lip
R6 Rotary Shaft Seal - Metal case single lip with wiper
R4 Rotary Shaft Seal - Metal case single lip
  (all seals with springs around main sealing lip)
Rubber covered case
single lip with wiper
Rubber covered case
single lip
Metal case
single lip with wiper
Metal case
single lip
           
  INTERCHANGE CODES
TECHNOX, PIONEER WESTON, FAIRWAY
R23
R21
R6
R4
  BARNWELL, PARKER, ATC, NOK, STYLE
TC
SC
TB
SB
  DIN3760
AS
A
BS
B
  CFW (SIMRIT), SIMRIT-FREUDENBERG
BASL
BA
B1 SL
B1
  GOETZE
827S
827N
822S
822N
  KACO
DGS
DG
DFS
DF
  STEFA
CC
CB
BC
BB
  GOCO
FA
A
   
  NATIONAL
32
35
   
  GARLOCK
94
92
   
  PAULSTRA
IEL
IE
   
  SIMMERWERKE
ASL
A
   
  SKF-CHICARGO RAWHIDE
HMSA7
HMS4
   
  SO GIANT
 104
103
210
207