Sc Profile PTFE/Viton/NBR Rotary Shaft Single Lip Oil Seal
|10-99 100-999 1,000+|
|FOB Unit Price:||US $100 US $10 US $1|
|Purchase Qty. (Pieces)||FOB Unit Price|
|Payment Terms:||T/T, Money Gram|
- Model NO.: SC series
- Usage: Rotary Shaft
- Speed: High Speed
- Lip: Single Lip
- Color and Dimension: Accept Customized Products
- Hardness: Mineral Oils,Synthetic Oils Clp, Hlp, Apgl, etc
- FKM Thermal Application: -15~+200 Celicus Degree
- Reciprocation Speed: 0-20m/S
- Transport Package: Polybag and Carton
- Origin: China
- Material: NBR, Viton/FKM, PTFE or Customized
- Type: Assembled
- Pressure: Atmospheric Type
- Standard: Standard
- Delivery Date: 15days
- NBR Thermal Application: -30~+100 Celicus Degree
- Pressure Data: 0.05MPa
- Trademark: morgan
- Specification: 6-3000mm
- HS Code: 4016931000
The SC profile rotay shaft seal is the rubber covered metal shell oil seal a single metal cage with a rubber coating and a primary sealing lip with integrated spring. The metal shell performs as a support. The spring provides the seal lip with radial pressure to avoid lubricant leakage. Applicable to operating condition with sealing media on one side and no dust on the other side.
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 contaminants
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] / 60,000
PressureThe 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:
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.
TemperatureThe table below indicates the temperature limits, depending on the materials and fluids used.
|Media||Maximum temperature, depending on the materials|
|Mineral oils||Oils 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||-|
|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 fluids||EL + L heating oil||-||-||-||-||+100°C||+90°C||-|
|Water for washing||-||-||+130°C||+100°C||+100°C||+100°C||-|
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 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 oils
- gearbox oils
- hypoid oils
- ATF oils for automatic gearboxes
- transmission oils
synthetic 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 fluids
- fluids for automatic gearboxes
- fluids for suspensions
- fluids for steering systems
- fluids for hydraulic transmissions
Hypoid 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.
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.
|Tolerances on the outside diameter ØD of the ring||Roundness tolerance|
|Apparent metal cage||Rubber coating||Coating with grooves||Apparent metal cage||Rubber coating|
|ØD1 ≤ 50.0||+0.10 / +0.20||+0.15 / +0.30||+0.20 / +0.40||0.18||0.25|
|50.0 < ØD1 ≤ 80.0||+0.13 / +0.23||+0.20 / +0.35||+0.25 / +0.45||0.25||0.35|
|80.0 < ØD1 ≤ 120.0||+0.15 / +0.25||+0.20 / +0.35||+0.25 / +0.45||0.30||0.50|
|120.0 < ØD1 ≤ 180.0||+0.18 / +0.28||+0.25 / +0.45||+0.30 / +0.55||0.40||0.65|
|180.0 < ØD1 ≤ 300.0||+0.20 / +0.30||+0.25 / +0.45||+0.30 / +0.55||0.25% of ØD||0.80|
|300.0 < ØD1 ≤ 500.0||+0.23 / +0.35||+0.30 / +0.55||+0.35 / +0.65||0.25% of ØD||1.00|
|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.
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
- malleable cast iron
- materials with a CVD and PVD coating
- 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 will depend on the linear speed (in m/s) and the level of pollution.
|Rotation speed||Hardness in HRC|
|s ≤ 4.0 m/s||45 HRC|
|4.0 < s ≤ 10.0 m/s||55 HRC|
|s > 10.0 m/s||60 HRC|
The recommendations below must be considered for the quality of the shaft surface area.
- Ra = 0.2 to 0.8 µm and 0.1 for demanding applications
- Rz = 1.0 to 4.0 µm
- Rmax ≤ 6.3 µm
- Ra = 0.2 to 0.4 µm and 0.1 for demanding applications
- Rz = 1.0 to 3.0 µm
- Rmax ≤ 6.3 µm
The shaft must have a tolerance of h11, in line with standard ISO 286-2
|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|
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.
|Ød1 ≤ 10.0||Ød1 - 1.50||2.00|
|10.0 < Ød1 ≤ 20.0||Ød1 - 2.00||2.00|
|20.0 < Ød1 ≤ 30.0||Ød1 - 2.50||3.00|
|30.0 < Ød1 ≤ 40.0||Ød1 - 3.00||3.00|
|40.0 < Ød1 ≤ 50.0||Ød1 - 3.50||4.00|
|50.0 < Ød1 ≤ 70.0||Ød1 - 4.00||4.00|
|70.0 < Ød1 ≤ 95.0||Ød1 - 4.50||5.00|
|95.0 < Ød1 ≤ 130.0||Ød1 - 5.50||6.00|
|130.0 < Ød1 ≤ 240.0||Ød1 - 7.00||8.00|
|240.0 < Ød1 ≤ 500.0||Ød1 - 11.00||12.00|
Note: For non-standard dimension oil seal, morgan seal is able to produce them. Please do not hesitate to contact with us.
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:
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.