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Guangzhou Morgan Seals Co., Ltd.

Oil Seal, Rubber Seal, Seal Ring manufacturer / supplier in China, offering B/Sb Type Single Lip Rotary Shaft Oil Seal Ring, Steel Cage Large Dimension Rubber Oil Seal, Steel Factory Cold Rolling Bearing Seal and so on.

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Supplier Homepage Product Oil seals SB/B/W/B1 series B/Sb Type Single Lip Rotary Shaft Oil Seal Ring

B/Sb Type Single Lip Rotary Shaft Oil Seal Ring

FOB Price: US $1-25 / Piece
Min. Order: 10 Pieces
Min. Order FOB Price
10 Pieces US $1-25/ Piece
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Port: Guangzhou, China
Production Capacity: 50000PCS/Month
Payment Terms: T/T

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Basic Info
  • Model NO.: SB SERIES
  • Usage: Shaft Sealing, Motors, Pumps,Transmissions
  • Speed: High Speed
  • Lip: Single Lip
  • Color: Customized
  • Cavity Tolerance: ISO H 7
  • Rubber Part Material: NBR, Viton, FKM, EPDM or Customized
  • FKM Thermal Application: -20~+180 Celicus Degree
  • Reciprocation Speed: 0-15m/S
  • Trademark: morgan
  • Specification: 6-1820mm
  • HS Code: 4016931000
  • Material: NBR
  • Type: Assembled
  • Pressure: Atmospheric Type
  • Standard: Standard
  • Shaft Tolerance: ISO H 11
  • Metal Shell: Low Carbon Steel
  • NBR Thermal Application: -25~+80 Celicus Degree
  • Pressure Data: 0-0.05MPa
  • Non-Standard: Accept Customized Products
  • Transport Package: Polybag and Carton
  • Origin: China
Product Description
The SB profile oil seal is a shaft seal composed of a single external metal cage with an internal rubber coating and a primary sealing lip with integrated spring.
B/Sb Type Single Lip Rotary Shaft Oil Seal Ring

Good radial rigidity, particularly for large diameters
Good stability when assembled, preventing the bounce-back effect
Sealing for low and high viscosity fluids
Modern primary sealing lip with low radial forces

Shaft sealing


The table below indicates the relationships between the linear speed, the rotation speed and the recommended material.
B/Sb Type Single Lip Rotary Shaft Oil Seal Ring
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] / 60,000


The standard shaft seals are generally used in unpressurised environments, or for pressures between 0.02 and 0.05 MPa maximum.
Higher pressures are acceptable, following testing, for standard NBR or FKM shaft seals used on a shaft diameter less than 30 mm. Refer to the graph below:
B/Sb Type Single Lip Rotary Shaft Oil Seal Ring
For higher pressures, we recommend using high-pressure SCHP - TCHP shaft seals which, because of their specific design (shorter sealing lip, thicker rubber membrane, metal cage closer to the shaft), can support pressures of up to 1.0 MPa with speeds reduced to 0.3 m/s.


The table below indicates the temperature limits, depending on the materials and fluids used.
MediaMaximum temperature, depending on the materials
Mineral oilsOils for motors+130°C+130°C-+170°C+130°C+100°C+150°C
Oils for gearboxes+120°C+130°C-+150°C+110°C+80°C+130°C
Oils 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-
HFA group - Emulsion with more than 80% water----+70°C+70°C+60°C
HFB group - Opposite solution (water in oil)----+70°C+70°C+60°C
HFC 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-
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°C
The 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.
Mineral oils
In 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 oils
  • gearbox oils
  • hypoid oils
  • ATF oils for automatic gearboxes
  • transmission oils
synthetic oils
This 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 fluids
  • fluids for automatic gearboxes
  • fluids for suspensions
  • fluids for steering systems
  • fluids for hydraulic transmissions
Hypoid oils
This 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.
Greases 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 fluids
It 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.


Tolerance 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 tolerance
Apparent metal cageRubber coatingCoating with groovesApparent metal cageRubber coating
ØD1 ≤ 50.0+0.10 / +0.20+0.15 / +0.30+0.20 / +0.400.180.25
50.0 < ØD1 ≤ 80.0+0.13 / +0.23+0.20 / +0.35+0.25 / +0.450.250.35
80.0 < ØD1 ≤ 120.0+0.15 / +0.25+0.20 / +0.35+0.25 / +0.450.300.50
120.0 < ØD1 ≤ 180.0+0.18 / +0.28+0.25 / +0.45+0.30 / +0.550.400.65
180.0 < ØD1 ≤ 300.0+0.20 / +0.30+0.25 / +0.45+0.30 / +0.550.25% of ØD0.80
300.0 < ØD1 ≤ 500.0+0.23 / +0.35+0.30 / +0.55+0.35 / +0.650.25% of ØD1.00
500.0 < 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.
B/Sb Type Single Lip Rotary Shaft Oil Seal Ring
Shaft material
Suitable materials are:
  • ordinary C35 and C45 steels used in mechanical construction
  • 1.4300 and 1.4112 stainless steels for sealing water
  • sprayed carbide coatings
  • graphite
  • malleable cast iron
  • materials with a CVD and PVD coating
Not appropriate:
  • chrome coatings solidified through non-uniform wear
  • plastic 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 softening
Shaft hardness
Shaft hardness will depend on the linear speed (in m/s) and the level of pollution.
Rotation speedHardness in HRC
s ≤ 4.0 m/s45 HRC
4.0 < s ≤ 10.0 m/s55 HRC
s > 10.0 m/s60 HRC
Surface 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 applications
  • Rz = 1.0 to 4.0 µm
  • Rmax ≤ 6.3 µm
For pressurev > 0.1 MPa:
  • Ra = 0.2 to 0.4 µm and 0.1 for demanding applications
  • Rz = 1.0 to 3.0 µm
  • Rmax ≤ 6.3 µm
Shaft tolerance
The shaft must have a tolerance of h11, in line with standard ISO 286-2
Shaft diameter
Ød1 (mm)
h11 (mm)
Ød1 ≤ 3.0-0.060 / 0
3.0 < Ød1 ≤ 6.0-0.075 / 0
6.0 < Ød1 ≤ 10.0-0.090 / 0
10.0 < Ød1 ≤ 18.0-0.110 / 0
18.0 < Ød1 ≤ 30.0-0.130 / 0
30.0 < Ød1 ≤ 50.0-0.160 / 0
50.0 < Ød1 ≤ 80.0-0.190 / 0
80.0 < Ød1 ≤ 120.0-0.220 / 0
120.0 < Ød1 ≤ 180.0-0.250 / 0
180.0 < Ød1 ≤ 250.0-0.290 / 0
250.0 < Ød1 ≤ 315.0-0.320 / 0
315.0 < Ød1 ≤ 400.0-0.360 / 0
400.0 < Ød1 ≤ 500.0-0.400 / 0
Chamfer 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)
R (mm)
Ød1 ≤ 10.0Ød1 - 1.502.00
10.0 < Ød1 ≤ 20.0Ød1 - 2.002.00
20.0 < Ød1 ≤ 30.0Ød1 - 2.503.00
30.0 < Ød1 ≤ 40.0Ød1 - 3.003.00
40.0 < Ød1 ≤ 50.0Ød1 - 3.504.00
50.0 < Ød1 ≤ 70.0Ød1 - 4.004.00
70.0 < Ød1 ≤ 95.0Ød1 - 4.505.00
95.0 < Ød1 ≤ 130.0Ød1 - 5.506.00
130.0 < Ød1 ≤ 240.0Ød1 - 7.008.00
240.0 < Ød1 ≤ 500.0Ød1 - 11.0012.00
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 moulds.B/Sb Type Single Lip Rotary Shaft Oil Seal Ring
Production line and warehouse:B/Sb Type Single Lip Rotary Shaft Oil Seal Ring
Our services:
Guangzhou Morgan Seals Co., Ltd the expert in sealing solution field who combines the rich seals research and production experience of her parent firm with the advanced technology and administration of Morgan, Worcester. Morgan Seals Research and Development ability is based on her parent firm who has won awards as scientific research achievements for more than 1000 projects and over 200 of them won scientific and technological progress prizes of municipal, provincial, ministerial and national levels. At the same time, it also has one National Certified Laboratory, one National Engineering Research Centers and three Industry Level Inspection Centers.
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