32 Series National Oil Seal/Radial Lip Seal/Radial Shaft Seal

DescriptionThe 32 series national oil seal/radial lip seal/radial shaft seal is a shaft oil seal composed of a single metal cage with a rubber coating, a primary sealing lip with integrated spring and an additional anti-pollution sealing lip.Two different O.D. designs are available: Flat rubber sheath as well as wavy. The additional dust lip protects the main sealing lip against dust and other fine solid contaminants and therefore this type is recommended for use in polluted environments. To achieve a long lifetime a suitable lubricant between the two sealing lips should be applied.Advantages
Very good static sealing
Very good thermal expansion compensation
Greater roughness is allowed in the housing
Reduced risk of corrosion
Sealing for low and high viscosity fluids
Modern primary sealing lip with low radial forces
Protection against undesirable air contaminantsApplicationsShaft sealing
Motors
Pumps
Transmissions
Technical data
Temperature: -40°C / +200°C Depending On Rubber Material
Pressure: Up to 0.05 MPa
Speed: up to 25 m/s
Medias: mineral and synthetic lubricants (CLP, HLP, APGL etc.)
metal Insert: Carton Steel
Spring: Carton Steel
Oil seal Cross Reference
SpeedThe table below indicates the relationships between the linear speed, the rotation speed and the recommended material.
The shaft seals with an additional protective lip are limited to a speed of 8 m/s.
Linear speed calculation:
s (m/s) = [Ø shaft (mm) x speed (rpm) x π] / 60,000TemperatureThe table below indicates the temperature limits, depending on the materials and fluids used.MediaMaximum temperature, depending on the materialsACMAEMEPDMFKMHNBRNBRVMQMineral oilsOils for motors+130°C+130°C-+170°C+130°C+100°C+150°COils for gearboxes+120°C+130°C-+150°C+110°C+80°C+130°COils for hypoid gears+120°C+130°C-+150°C+110°C+80°C-ATF oils+120°C+130°C-+170°C+130°C+100°C-Hydraulic oils+120°C+130°C+150°C+130°C+90°C-Greases-+130°C--+100°C+90°C-Fire-resistant
fluidsHFA group - Emulsion with more than 80% water----+70°C+70°C+60°CHFB group - Opposite solution (water in oil)----+70°C+70°C+60°CHFC group - Polymer aqueous solution--+60°C-+70°C+70°C-HFD group - Water-free synthetic fluids---+150°C---Other fluidsEL + L heating oil----+100°C+90°C-Air+150°C+150°C+150°C+200°C+130°C+90°C+200°CWater--+150°C+100°C+100°C+90°C-Water for washing--+130°C+100°C+100°C+100°C-Temperature rangeMin.-25°C-40°C-45°C-20°C-30°C-30°C-60°CMax.+150°C+150°C+150°C+200°C+150°C+100°C+200°CThe sealing lip of the shaft seal endures a higher temperature due to shaft rotation, and the significant pressure and friction on the mechanical parts. Good lubrication is therefore necessary to allow for a better release of heat and thus limits the temperature rise in the parts subjected to friction.
By definition, the temperature at the edge of the seal is raised when the rotation speed (and thus the linear speed) as well as the shaft diameter increases. FluidsMineral oilsIn general, this type of oil has few additives and is therefore perfectly suitable for all of the rubbers used for the rotary shaft seals. The following oils are suitable for rotating applications:motor oilsgearbox oilshypoid oilsATF oils for automatic gearboxestransmission oilssynthetic oilsThis type of oil is used to improve different characteristics such as the resistance to ageing, resistance to high temperatures, viscosity, etc. and has a good compatibility with the majority of rubbers used for the shaft seals. Tests may need to be performed beforehand to measure the degree of compatibility of this type of oil with the materials used. Among the synthetic oils are:brake fluidsfluids for automatic gearboxesfluids for suspensionsfluids for steering systemsfluids for hydraulic transmissionsHypoid oilsThis type of oil contains special components such as EP additives. These enable lubrication and thus limit any seizing at the bearings, for example. When affected by heat, these additives have the tendency to lead to deposits on the sealing lip. That is why we recommend using shaft seals with a sealing lip comprising return pumping leads in order to limit the increase in temperature and above all, to reduce these potential carbon deposits.GreasesGreases are generally applied to bearings etc. and require specific adaptation to provide favourable operating conditions for the shaft seal. To prevent the lip of the seal from sustaining more significant pressures than planned, we recommend positioning the lip seal on one side of the bearing in such a way so that the lip is not prematurely destroyed. We also recommend reducing the rotation speed by 50% when lubricated, to ensure that less heat escapes during friction.Aggressive fluidsIt is critical to choose the correct material to better resist different aggressive fluids (acids, solvents, chemical products, etc.). For applications in a rotating environment, we recommend using materials such as FKM rather than NBR. For operations that are dry or use very little lubrication, and where the rubbers do not resist certain aggressive fluids, we advise you to use our PTFE shaft seals.SEAL DESIGNTolerance for the outside diameter of the seal (ØD)The table below indicates the pre-tightening for shaft seals on the housing diameter according to standard ISO 6194-1.Bore diameter
ØD1 (mm)Tolerances on the outside diameter ØD of the ringRoundness toleranceApparent metal cageRubber coatingCoating with groovesApparent metal cageRubber coatingØD1 ≤ 50.0+0.10 / +0.20+0.15 / +0.30+0.20 / +0.400.180.2550.0 < ØD1 ≤ 80.0+0.13 / +0.23+0.20 / +0.35+0.25 / +0.450.250.3580.0 < ØD1 ≤ 120.0+0.15 / +0.25+0.20 / +0.35+0.25 / +0.450.300.50120.0 < ØD1 ≤ 180.0+0.18 / +0.28+0.25 / +0.45+0.30 / +0.550.400.65180.0 < ØD1 ≤ 300.0+0.20 / +0.30+0.25 / +0.45+0.30 / +0.550.25% of ØD0.80300.0 < ØD1 ≤ 500.0+0.23 / +0.35+0.30 / +0.55+0.35 / +0.650.25% of ØD1.00500.0 < ØD1 ≤ 630.0+0.23 / +0.35+0.35 / +0.65+0.40 / +0.75--630.0 < ØD1 ≤ 800.0+0.28 / +0.43+0.40 / +0.75+0.45 / +0.85--Tolerance for the inside diameter of the seal (Ød)Free and without constraint, the inside diameter of the sealing lip is always smaller than the diameter of the shaft. The pre-tightening or interference denotes the difference between these two values. Depending on the shaft diameter, the diameter of the sealing lip is generally considered to be less, between 0.8 and 3.5 mm.Shaft material
Suitable materials are:ordinary C35 and C45 steels used in mechanical construction1.4300 and 1.4112 stainless steels for sealing watersprayed carbide coatingsgraphitemalleable cast ironmaterials with a CVD and PVD coatingNot appropriate:chrome coatings solidified through non-uniform wearplastic materials resulting from low thermal conductivity, which can lead to a disturbance in the transport of heat, an increase in temperature in friction areas with the shaft seal, as well as a potential softeningShaft hardness
Shaft hardness will depend on the linear speed (in m/s) and the level of pollution.Rotation speedHardness in HRCs ≤ 4.0 m/s45 HRC4.0 < s ≤ 10.0 m/s55 HRCs > 10.0 m/s60 HRCSurface roughness
The recommendations below must be considered for the quality of the shaft surface area.
Standard conditions:Ra = 0.2 to 0.8 µm and 0.1 for demanding applicationsRz = 1.0 to 4.0 µmRmax ≤ 6.3 µmFor pressurev > 0.1 MPa:Ra = 0.2 to 0.4 µm and 0.1 for demanding applicationsRz = 1.0 to 3.0 µmRmax ≤ 6.3 µmShaft tolerance
The shaft must have a tolerance of h11, in line with standard ISO 286-2Shaft diameter
Ød1 (mm)Tolerance
h11 (mm)Ød1 ≤ 3.0-0.060 / 03.0 < Ød1 ≤ 6.0-0.075 / 06.0 < Ød1 ≤ 10.0-0.090 / 010.0 < Ød1 ≤ 18.0-0.110 / 018.0 < Ød1 ≤ 30.0-0.130 / 030.0 < Ød1 ≤ 50.0-0.160 / 050.0 < Ød1 ≤ 80.0-0.190 / 080.0 < Ød1 ≤ 120.0-0.220 / 0120.0 < Ød1 ≤ 180.0-0.250 / 0180.0 < Ød1 ≤ 250.0-0.290 / 0250.0 < Ød1 ≤ 315.0-0.320 / 0315.0 < Ød1 ≤ 400.0-0.360 / 0400.0 < Ød1 ≤ 500.0-0.400 / 0Chamfer and radius
You are strongly advised to install a chamfer on the shaft so as not to alter the primary sealing sealing lip of the shaft seal during assembly. Please refer to the table below.Shaft diameter
Ød1 (mm)Chamfer diameter
Ød3 (mm)Radius
R (mm)Ød1 ≤ 10.0Ød1 - 1.502.0010.0 < Ød1 ≤ 20.0Ød1 - 2.002.0020.0 < Ød1 ≤ 30.0Ød1 - 2.503.0030.0 < Ød1 ≤ 40.0Ød1 - 3.003.0040.0 < Ød1 ≤ 50.0Ød1 - 3.504.0050.0 < Ød1 ≤ 70.0Ød1 - 4.004.0070.0 < Ød1 ≤ 95.0Ød1 - 4.505.0095.0 < Ød1 ≤ 130.0Ød1 - 5.506.00130.0 < Ød1 ≤ 240.0Ød1 - 7.008.00240.0 < Ød1 ≤ 500.0Ød1 - 11.0012.00Oil Seal Size In mm
Morgan Seals has the biggest vulcanizing machine(4000T) and different kinds of seal moulds. So for the non standard oil seals, please do not hesitate to contact with us. The following is the the picture of our production line and warehouse:
about Morgan
Established by Guangzhou Mechanical Engineering Research Institute Co., Ltd. (51% share, hereinafter to be referred as GMERI) and Morgan Construction Co., Worcester, MA, U. S. A. (49%, hereinafter to be referred as Morgan, Worcester) in 2006, Guangzhou Morgan seals Company Ltd. Is a professional manufacturer for sealing products. Combined the rich seals research and production experience of GMERI with the advanced technology and administration of Morgan, Worcester, the joint venture is renowned for its modern production lines, persisting research & development, strict quality control, quality sales and after-sales service. Now she has gained a good name from her customer all over the world, such as Siemens Primetals, Baosteel, SMS siemag and so on.