Oil Seals - Radial Shaft Seals

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REQUESTING THE RIGHT SEAL

 

To request a REPLACEMENT SEAL
you must know:
To request a seal for a SPECIFIC APPLICATION
you must know:
Type: Single Lip, Double Lip, W/Dust Wiper S Speed of shaft
Spring Loaded? T Temperature
Metal or Rubber OD A Application
Size: Shaft / Bore / Width M Media being sealed
Inch or Metric P Pressure
Material: Nitrile, Fluorocarbon, etc S Sizes of surface conditions


RADIAL SHAFT SEAL NOMENCLATURE


1) Seal Width
2) Metal Case (Outer)
3) Housing
4) Inner Case
5) Outer Face
6) Inside Face
7) Radial Wall
8) Seal Outer Diameter
9) Housing Bore Diameter
10) Spring Position (R-Value)
11) Spring Groove
12) Garter Spring
13) Heel Section
14) Flex Section
15) Spring Retainer Lip
16) Inside Lip Angle
17) Toe Face
18) Auxiliary (Dust) Lip
19) Rib (Helix)
20) Contact Point
21) Inside Lip Surface
22) Spring Set Lip Diameter
23) Free Lip (Unsprung) Diameter
24) Contact Line Height
25) Lip Height
26) Lip Angle


DIMENSIONING A SEAL


 

  • Seal O.D.’s follow SAE/RMA recommended pressfits and tolerances.
  • Seal I.D. will vary for different manufacturers due to different production processes and design.


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SEAL SELECTION PROCESS

 

Typically a Custom Design, TC4, TB4, DKH, DKB,
or a Hydraulic Seal

< < Reciprocating < < What Type of Motion?
v
v

Radial
v
v

                   What is Moving?    > > Bore > >

Typically a
Custom Design

v
v

Shaft
v
v

BA or BASL

< < Water < < Fluid to Seal?   > > Grease > >

VC, KC, KB, VB

v
v

Oil
v
v

Typically a Custom Design

< < Over 5 PSI < < How Much Pressure?                    

v
v

Under 5 PSI

v
v

Typically a Custom Design

< < Heavy Contamination < < Outside Sealing?  > > Fluid > >

DC, DB, or
Two Seals

 

v
v

 

Light Dust
TC, BASL, TB, or TBR

Air
SC, BA, SB, or SBR

New Customer Hotline: 800-775-6525

Existing Customer Specialist: 603-468-3600 or repeat customers

Marco Rubber & Plastics
PO Box 1150
Seabrook, NH 03874

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