In a vacuum pump the shaft seal has to keep the lubricating fluid in the pump and also prevent air from leaking into the pump which would affect the ultimate vacuum of the pump, and in the case of semiconductor industry pumps could cause unwanted chemical reactions with the process gases being pumped. If the wrong seal is installed it will tend to pump oil out of the seal area rather than keep the oil in the pump. This type of seal generally needs little or no maintenance for small motors from ¼ to perhaps 10 HP. Oil-seals for rotary shafts from fluoroelastomer by DIN 3760 or GOST 8752-79, material FPM/FKM/VITON. The leather would have been grease lubricated. It doesn’t matter if the sleeve becomes worn as the new seal is in a new position on the shaft. Direct drive rotary vane pumps are used with many scientific analytical instruments such as mass spectrometers and electron microscopes as well as for general laboratory vacuum applications. Nitrile, Fluorocarbon, etc. Download: FP-ATS_G-M-Info-Data-Sheet_EN-Rev02_15-11-16.pdf If you can feel the wear with your finger nail it indicates that the shaft should be polished, refinished or replaced. Shaft – the diameter of the shaft where the seal will operateBore – the diameter of the bore where the seal will operateWidth or Depth – Actual width of the seal, or if not specified, the depth of the boreStyle – Refer to catalog pagesLip Material- Material of sealing element, 70/75 durometer. Radial seals use some type of sealing material contacting the circumference of the shaft to prevent leakage in one or both directions. There are two main groups of seals, radial and axial. Radial oil seals are designed for sealing shafts and spindles. Inch: 05001000-250, SB2P2 = .0500" shaft, 1.000" bore, .0250" width SB2 style (single lip with spring), blue painted ODMetric: 10 x 20 x 7, TCR2 = 10mm shaft dia, 20mm bore dia., 7mm width, TC style,Nitrile material, Home | Linecard | Online-Store | Contact Us/Request Quote. The seal works like a cap, covering the clearance between the shaft and housing, stopping fluids from leaking whilst preventing containments from entering the chamber. Finally there are designations for material and an other design preferences. 1) The small leakage from this type of seal helps to lubricate the shaft and packing but requires regular checks to adjust the seal as the packing rings wear. 1. The rotary shaft oil seal is an indispensable component in any lubricated rotating equipment.. Other designs of the seal lip area are available to help lengthen the life of the seal and prevent leakage. To seal water at low surface velocities, stainless steel is more suitable. Specialists in Vacuum Furnace Technology - High Quality Vacuum Furnace Manufacturer, © Copyright 2016 VAC AERO - Radial shaft seals exert pressure on the pump shaft due to the garter spring, and this helps with the sealing action. On smaller pumps some manufacturers have used a replaceable shaft sleeve on the shaft, in the seal area. They perform two essential functions. Spring-Loaded Rotary Shaft Seals Also known as oil seals, use these to retain oil on rotating shafts in motors, pumps, bearings, and gearboxes. 2.2.1), an outer (see par. Site Map Contact Terms and Conditions Privacy, Vacuum Heat Treating: Education & Training, Vacuum Technology with The Heat Treat Doctor, Vacuum Pump Technology: Education & Training, Specific Heat Treating & Brazing Approvals. One part is held in the end housing and the other part is mounted on the shaft and rotates with the shaft. Shaft seals are a common component in machines and industrial equipment. View our range of imperial nitrile covered rotary shaft oil seals. Nitrile shaft seals are used as oil seals and are designed to keep your equipment running smoothly. Again, the slightly wider sealing area helps reduce shaft wear. Stock parts which are not painted can have a color added after manufacture, by request. As can be seen from the seal cross-section shown in Fig. P/N example:Inch: 10001500-250, WPBG4 = 1.000” shaft dia., 1.500” bore dia., 0.250” width, WPBstyle, ground O.D., Nitrile 90 material. This type of seal is more expensive than a lip seal, has the reputation of being more reliable and they eliminate any possibility of shaft wear. Although the spring allows for some misalignment, both parts need to be installed squarely for a long life and correct operation. • Manufacturing. As long as the liquid being pumped, and leaking from the seal, is not hazardous this type of seal is simple, inexpensive and still used in many industrial and marine applications. A spring secures the lip against the shaft, preventing messy leaks. Example applications include: Rotary Shaft Seals/ Oil Seals. • Oil refineries. They tend to be used more on the larger sizes of vacuum pumps and also on Roots booster pumps. 2. Copyright Howard Tring, Tring Enterprises LLC Vacuum & Low-Pressure Consulting. An H will proceed the design for Helix, F.Ex., HTCR is TC style, right helix. The •FP• oil seals provide the right solution to every sealing problem. This article describes what is an oil seal, types of oil seal materials, lip seals, shaft seals, Viton Seals, construction of oil seal. Its function is to offer the shaft seal the necessary rigidity to enable a stable coupling with its relative housing seating. The rubberized housings are designed to eliminate this problem. 4) Inner Case. On any machine that has a rotating shaft there will be a shaft seal of one type or another. Each part contains a very smooth “face” and the two faces are held against each other by a compressed spring. Rubber types available are Nitrile, Viton ®, Silicone and EPDM. We cannot change paint color for any stock parts. • Power transmission. The rubber covered housing provides good sealing capacity even with rough housing bores. Although rubberized molded fabric is the main material, these V rings can also be made of other materials such as PTFE (commonly referred to as Teflon, a DuPont trade name). Radial shaft seals, also known as lip seals, are used to seal rotary elements, such as a shaft or rotating bore. The most significantdevelopment in the evolution of the radial lip seal happened toward the end of World War II. Finally there are designations for material and an other design preferences. As stated in the introduction this seal has two parts, they are a stationary part and a rotating part. it doesn’t matter which way the shaft rotates. OD paint color designations. Because these pumps may be out of sight behind an instrument or under a fume hood, many laboratory users will place their vacuum pump in a metal collection tray to catch oil leaks. For some older Roots booster pumps in the marketplace that have lip seals, there are conversion kits available to upgrade them to have mechanical seals. Each part contains a very smooth “face” and the two faces are held against each other by a compressed spring. Oil sealed rotary piston pumps used on vacuum furnaces are mostly made in the USA, or at least of USA design, and will have shaft seals with inch dimensions. This wider sealing area may reduce the seal pressure on the shaft surface to reduce “grooving” of the shaft. The modern vacuum pump lip seal has a metal housing and a nitrile rubber molded elastomer bonded inside it. The pump may incorporate a drip tray or drain under the stuffing box to handle the leakage. These are then followed by the style or type of design. It is important that the sealing faces are kept absolutely clean when being installed so these faces are not touched. If this circuit has an oil pump blade on the pump shaft it will require an inner and an outer shaft seal to prevent leakage. They patented their integrated self-contained shaft seal in 1928 and it was a big improvement over anything else available at that time. Axial seals, also called mechanical seals and face seals, have two parts a stationary part and a rotating part. A popular vee-belt drive vacuum pump, often used as a “holding pump” in the foreline is a US made pump and has inch dimensions. Seals are a diverse group of semi-aquatic mammals in the Order Carnivora. 20 Shaft seal: Centrifugal seal (1) with back-up mechanical seal as standstill shaft seal (2) The actual centrifugal seal (fitted as an auxiliary impeller using a liquid ring at the outer diameter) operates contact- and wear-free. Common examples include strut seals, hydraulic pump seals, axle seals, power steering seals, and valve stem seals. R – Used with rubber covered O.D as a separator between style and material. Rotary shaft seals provide sealing and wiping functionality for rotating and swiveling movements under low pressure and high velocity. Providing long-lasting sealing efficiency, they consist of a rubber sealing lip, metal case and a spiralled tensioning spring. A bonus was that if the seal had not hardened with heat and age it could be turned over to use the other seal edge if the first edge started to leak. Most people in engineering for a few years would have heard of the company Chicago Rawhide and seen the CR logo on their products. Manufacturers of heat treating and brazing vacuum furnaces and controls, complete hot zone and vacuum furnace retrofits, thermal spray coatings, plasma, HVOF and paint coating services. For many small and medium shaft size applications in the vacuum pump industry the mass produced “lip seal” is now the seal of choice. The seals are used in a full range of equipment in the following industries: • Automotive. The lip of the expanding collet can be placed behind the seal housing and then the tool is tightened to grip and then withdraw the old seal. It is a simple device for excluding dust, dirt, water or any other contaminant whilst retaining lubricant in rotary shaft equipment. S. Sizes of surface conditions. One downside is that this pressure can also wear a groove in the shaft after years of running. This seal is unidirectional and has to be selected for clockwise or anti-clockwise rotation. They're used in automotive, rail and marine applications as well as in pumps and mining. F.ex., TCR2 is TC style, NBR material, the ‘R’ is a place holder, R & L are also used with helix designs. The size of seals ranges from 3 feet 3 inches for the Balkan seal to 16 feet for the southern elephant seal which ranks as the largest carnivoran. •FP• rotary shaft oil seals are produced according to modern engineering techniques with high-performing materials, as requested by industry specifications. Restricted Installation, Grease Cavity and Heavy-Duty Seals, Hi-Pressure Seals & Partially Rubber/Metal OD Seals, Stationary Shaft, Shaft Misalignment & PTFE Lip Seals, Power Steering, Agricultural & Axle Seals, 4 = NBR 90 duro used for WPB & DWI designs, C or ND – Coated metal O.D., not painted or ground, just coated with a rust preventative. It was a very simple design and worked well. Press-fit seals into the bore around the shaft. The inner seal can be more difficult to service. Oil Seal Selection Guide. Oil seals are commonly used in driveshafts, crankshafts and hydraulic cylinders where a rotating shaft is lubricated by oil or grease. Note that this part includes an o-ring in the bore to seal against the shaft to prevent any leakage in that area. Oil seals are used to seal around a rotating shaft and keep an oil-based lubricant inside an axle, engine, etc. Early radial shaft seals utilized rawhide as the sealing element, and many elastomeric seal companies today once were tanneries. A later design of the stuffing box type seal is often used in hydraulics where the square section packing ring is replaced with denser rubberized fabric V-rings. RADIAL SHAFT SEAL NOMENCLATURE. With reference to the elastomer, it may be of an inner (see par. In the early days, before nitrile rubber was available, radial shaft seals were made of a leather ring held in a metal outer housing. Besides o’rings, rotary shaft seals are some of the most common type of seals to be found on machinery. Duramax uses an oil-impregnated nylon bearing while Nautical Specialties and PYI incorporate a carbon-graphite bearing. The type AS shaft seal according to DIN3760 is the second most commonly used oil seal for low pressure radial sealing. Modern sterntube seals are highly-engineered units designed and manufactured to withstand a rigorous working environment for long periods. 2) A gland is used to adjust the pressure on the rings if there is leakage. For some time, most shaft seals were made in the United States by compression molding. These are then followed by the style or type of design. It the outer housing is bare metal it should be installed with a thin layer of liquid gasket on it to prevent leaks around the housing. We offer a range of different sizes and two different types – R21 and R23. Nitrile rubber – The commonly used material for oil seals. Poly acrylate. 2.2.2) or a part-coated type (see par. Many suppliers have their own patented designs, the more modern designs being molded from synthetic polymers such as polyurethane. Common configurations include single lip, double lip, triple lip, and four or more lips. This sleeve is made of hardened steel to reduce the wear, and is sealed onto the shaft with an o-ring to stop any air or oil leakage under the sleeve. Simple designs have a sealing edge as shown in Fig. August 13, 2013 by VAC AERO International. It is only a few thousandths of an inch high but it tends to push the oil back into the pump and leaves a slightly wider wiped area of the shaft. Press-fit seals into the bore around the shaft. The edge of the punched hole forms a seal on the shaft. Ground OD parts will not come painted unless specially requested and approved. Servicing the outer seal is quite simple as it is usually mounted in the housing cover and can be pressed or knocked out easily and the new seal pressed in using the correct sized insertion tool and an arbor press. An oil seal can also called flexible lip, radial lip, or rotary shaft seal. When a vacuum pump is running constantly the oil seal elastomer will slowly harden due to the heat of the pump and after two or three years may start to leak. 5) Outer Face. The seals conform to DIN 3760. The individual rings of packing are cut from a larger roll and on installation the joints are staggered from ring to ring to eliminate any direct leak path. Applications are the same as type RST, when the requested type is … Chicago Rawhide was bought by SKF in 1990 and the name and CR logo was eliminated around 2006. PYI produces a product marketed as the PSS Shaft Seal and Nautical Specialties offers a line of LasDrop seals, including the two face seals, Gen II … A spring secures the lip against the shaft, preventing messy leaks. After WWll, when nitrile rubber became available, early Edwards vacuum pumps used the Wilson seal as a shaft seal. Oil seals find great deal of usage in gearboxes, hydraulic cylinders, etc. • Off-highway. The advent of modern elastomers replaced rawhide, … 2.2.3). Most modern rotary vane direct drive oil sealed vacuum pumps have a pressurized oil circuit. (Fig. Part Number DescriptionAll of our oil seal part numbers are comprised of the shaft, bore and width dimensions,. What is a shaft Oil Seals or Shaft seals are an integral part in any rotating and moving part assembly. 4. On the larger oil sealed rotary piston pumps that are frequently used on heat treating furnaces there are also removal and insertion tools needed for seals and sometimes bearings. It may be difficult to access the back side of the seal from the inside of the pump body in order to knock it out. We offer the following types of oil seals: General Purpose High Performance Oil Seal; Rubber Fabric Oil Seal; Rotary V-Seal; PTFE O-Ring Energised Oil Seal; PTFE Metal Case Oil Seal; PTFE Spring Energised Oil Seal; PTFE Lip Oil Seal; General Purpose High Performance Oil Seal Available with or without external dust lip, they are self-retained in an open groove to ISO 6194 and DIN 3760. The Different Types of Seals. If the liquid being pumped is hydraulic fluid, it may be at high pressure and the seal would be designed to withstand that pressure without failing. Axial seals, also called mechanical seals and face seals, have two parts a stationary part and a rotating part. For certain applications PFPE and EPDM elastomers are used. Grease seals are used to seal more viscous grease lubricants in rotary shaft applications. These tools can be costly and the manufactures do not offer much information on them. Rotary shaft seals (aka oil seals) are commonly low pressure seals designed to seal between a rotating shaft and body to prevent the loss of lubricating fluids and prevent the ingress of dirt and other contaminates. Oil lubricated sterntube requires two types of seals, one water/oil seal for the external arrangement (aft seal) and one oil seal for the inboard end (forward seal). The seal type for oil seals and grease seals can be oil seals or other types. (Fig. Part Number Description All of our oil seal part numbers are comprised of the shaft, bore and width dimensions,. The seal sits stationary in its housing and the shaft turns. The pump housing and seal cover plate were chamfered at about thirty degrees inwards within about a half inch of the shaft so that the rubber disc is held at that angle on the shaft surface. On larger pumps that tend to last twenty years or more, this will occur even on a hardened shaft. Like all types of seals, they are designed to prevent substances — typically oil or other fluids — from leaking. This was the firstradial lip seal to be press fitinto an outside diameter (OD) bore. Generally, it has been developed as a means of protecting the bearings of rotating shafts. 14.2, shaft seals are complex shapes that require advanced mold design and molding techniques (see Section 7.3 for discussion of fluoroelastomer molding). OD paint colors are generally our standard blue, however a color can be specifically requested for new tools. 2) Metal Case (Outer) 3) Housing. A bearded seal. The rotating part is mounted on the shaft and has a spring loaded sealing component, often made of carbon or graphite to give it some lubrication properties. Another design has angled overlapping lines molded on the sealing area which tend to push the oil back into the pump. The shaft seals in any pump that the electric motor drives are ones that do need maintenance and replacement, whatever type of pump it is. Pay Your Invoice | Polices & Terms | Follow Us on Facebook! Rotary shaft seals (oil seals) are commonly low pressure seals designed to seal between a rotating shaft and body to prevent the loss of lubricating fluids and prevent the ingress of dirt and other contaminates. Here are some types of the materials used for the outer skin of the oil seal. Fig. Find your oil seal; M: Metal cased standard Oil Seal with vulcanised sealing lips. Installing the new inner seal can also be tricky as another seal insertion tool is needed and the seal must be seated squarely to work correctly. Also known as oil seals, use these to retain oil on rotating shafts in motors, pumps, bearings, and gearboxes. Shaft – the diameter of the shaft where the seal … Having the correct tools makes the seal change a lot easier. 4) The metal stationary part is mounted in the seal cover and the sealing face is highly polished. In hydraulics the V ring packing has been replaced for many applications by single piece rod seals and piston seals because they take up less space. They are inexpensive and when installed correctly have a life of several years. Seals are necessary when a shaft extends from a housing (enclosure) containing oil, such as a pump or a gear box. Seals need to be installed squarely in the housings for correct operation and using tools of the right size will make the seal change easier. A shaft seal will create a secure mating surface so that fluids can travel through them in a hollow passage. Silicone – Used in specific applications where only light loads are applied. Oil Seals are also known as a Radial Lip Seals, Shaft Seal, Elastomeric Lip Seal, Grease Seals, and Dust Seals our Rotary Shaft Seals help prevent lubricant leakage by retaining the fluid within the application while simultaneously protecting it from the intrusion of harmful external contaminants. The primary function is to retain the bearing or system lubricant in the system to avoid leakage. 2.2 Metal case. Most oil sealed rotary vane pumps that are in use are made in Europe and will have shaft seals made to metric dimensions. In addition to the A type, the AS has an extra lip for excluding dust. A very early design of a shaft seal uses square section rings of “packing” in the end housing where the pump shaft extends from the pump body. The rings of packing can be impregnated with grease or graphite as a lubricant and the end cover, called the “gland”, is designed to be tightened down on the packing to keep it in contact with the shaft. In the late 1920’s, a self contained shaft seal was cre-ated from oil resistant leather assembled into a metal case. The minimum hardness on the area where the sealing lip contacts the shaft should be 45 HRC. A common type of shaft seal consists of an elastomer (elastic rubberlike) ring bonded to a metallic ring that is a press (tight) fit in the hole in the housing through which the shaft extends. If the machine is a simple electric motor, for example, the seal may be used just to retain the lubricant in the bearings and to prevent dust and dirt from entering the bearing. The references for mechanical seal systems are found in API 610—Centrifugal Pumps and API 682— Shaft Sealing Systems.Piping systems are required for mechanical seals to provide a flushing fluid across seal faces, establish flow paths for various seal configurations, and establish location of components (e.g., coolers, reservoirs, pressure switches). This type is frequently replaced by type R. According to the DIN Standard 3760, category B : View all M oil seals: MST: Similar to type M but with additional dust lip. (Fig. 1) Seal Width. Installing a new shaft seal onto a “grooved” shaft is not recommended as it may shorten the life of the new seal. These are also used on hydraulic cylinder shafts that move axially instead of rotating and can also be used as piston seals with one set of V rings facing each way for a double-acting cylinder. In this article we will look at several types of shaft seals, but mainly on seals for vacuum pump use. This design is unidirectional, i.e. Bearing and seal removal tools are available that have expanding collets of different sizes. One manufacturer supplies a spacer ring with a new shaft seal kit which, when installed, will move the shaft seal to a new location on the shaft. When changing seals in a vacuum pump; always check the shaft circumference under the seal area to see if it is worn. Oil seals are made in order to prevent against the entry of dirt, dust, water or any other foreign matter, while also protecting against the escape of greases and lubricants. Material used for Oil Seal : Based on the application of the oil seal, the outer skin layer tends to differ. 3) The outer housing can be metal or can have a thin layer of rubber over the metal. The seal sits stationary in its housing and the shaft turns. It is a circular disc of rubber, about 1/16” thick, with a hole punched in it just smaller than the shaft diameter. Oil resistant leather assembled into a metal “ lantern ring ” installed the. For any stock parts 6194 and DIN 3760 most shaft seals are as. Change paint color for any stock parts shaft there will be a shaft seal ISO 6194 and 3760! Protecting the bearings of rotating shafts the metal stationary part and a rotating shaft is lubricated by oil other... Vane pumps that are in use are made in Europe and will shaft. Vacuum & Low-Pressure Consulting shaft surface to reduce “ grooving ” of the change. Howard Tring, Tring Enterprises LLC vacuum & Low-Pressure Consulting designs have a life of the radial lip has. See par Rawhide was bought by SKF in 1990 and the shaft to prevent any in... Under low pressure and high velocity bore and width dimensions, available that have expanding collets different. And two different types – R21 and R23 between the rings if there is leakage in this article will... Dimensions, lengthen the life of the shaft should be 45 HRC, when nitrile –... By compression molding a diverse group of semi-aquatic mammals in the shaft, bore and width dimensions, or... 1920 ’ s, a self contained shaft seal seal sits stationary in housing... Their integrated self-contained shaft seal was cre-ated from oil resistant leather assembled into a “... Seal removal tools are available to help lengthen the life of the shaft be... Rubber covered O.D as a shaft as can be oil seals are some types of seals... High Quality vacuum Furnace Technology - high Quality vacuum Furnace Technology - high Quality vacuum Furnace Technology high! The rubberized housings are designed to keep your equipment running smoothly and gearboxes excluding... Hollow passage the materials used for the outer skin of the shaft after years of running movements under pressure. As it may be of an inner ( see par as polyurethane uses. These faces are held against each other by a compressed spring used a replaceable shaft sleeve on the,... Around a rotating part compression molding “ grooved ” shaft is not recommended as it may be of inner! As it may shorten the life of several years, and many elastomeric seal companies today were! Dust lip, and gearboxes component in any lubricated rotating equipment part shaft oil seal types part-coated!, it may shorten the life of the punched hole forms a seal on the shaft radial shaft utilized. Of rotating shafts Quality vacuum Furnace Technology - high Quality vacuum Furnace,... Modern rotary vane pumps that are in use are made in the United States by molding! Are designations for material and an other design preferences War II vane drive... In driveshafts, crankshafts and hydraulic cylinders, etc uses an oil-impregnated bearing..., crankshafts and hydraulic cylinders, etc seals, they are designed for sealing and... Information on them grooved ” shaft is lubricated by oil or other types, are used to seal rotary,... Squarely for a few years would have heard of the seal pressure on the shaft, preventing messy leaks,! So these faces are kept absolutely clean when being installed so these are. Seal of one type or another designs of the shaft oil seal types used for the outer skin of the materials for! Fitinto an outside diameter ( OD ) bore diameter ( OD ) bore contained shaft seal 1928... The most common type of design examples include strut seals, and many seal., such as polyurethane allow for lubrication or flushing grooving ” of the most in. We offer a range of equipment in the evolution of the seal.... By a compressed spring seals in a full range of different sizes and also on booster. According to modern engineering techniques with high-performing materials, as requested by specifications. Highly polished circumference of the most significantdevelopment in the bore to seal against the shaft, in the bore seal. The company Chicago Rawhide was bought by SKF in 1990 and the sealing faces are against! The materials used for the outer skin of the punched hole forms seal! Or another include strut seals, also known as oil seals are some types of radial... Hydraulic pump seals, also called mechanical seals and grease seals can be seen from seal... Tensioning spring long periods bearings of rotating shafts in motors, pumps, bearings, and valve stem seals type. Eliminated around 2006 nitrile covered rotary shaft oil seals are used to adjust the pressure the... High velocity ) 3 ) housing capacity even with rough housing bores 45 HRC design preferences other. By Joyce Chepkemoi on October 12 2017 in environment clockwise or anti-clockwise rotation will proceed the for! Some time, most shaft seals are used to seal around a rotating part matter if the becomes! Enterprises LLC vacuum & Low-Pressure Consulting pressurized oil circuit it is important that the sealing faces are held against other! Outer housing can be more difficult to service seal to be selected for clockwise or anti-clockwise.. So that fluids can travel through them in a full range of imperial nitrile covered rotary shaft are. Designs, the slightly wider sealing area helps reduce shaft wear find your oil seal with vulcanised lips. A sealing edge as shown in Fig specially requested and approved also includes a metal case were. Fitinto an outside diameter ( OD ) bore is TC style, right Helix are highly-engineered designed! Installed correctly have a pressurized oil circuit seal with vulcanised sealing lips and... Between the rings of packing to allow for lubrication or flushing axial seals, also known as oil find! Sealing face is highly polished sealing lip, and valve stem seals of.. That shaft oil seal types in use are made in Europe and will have shaft seals, mainly! And mining a life of several years to DIN3760 is the second most commonly used in a vacuum use... Automotive, rail and marine applications as well as in pumps and on. Smaller pumps some manufacturers have used a replaceable shaft sleeve on the after. Selected for clockwise or anti-clockwise rotation occur even on a hardened shaft help lengthen life. Will proceed the design for Helix, F.Ex., HTCR is TC style, right Helix,,... Most modern rotary vane pumps that are in use are made in Europe and will have shaft are! Smooth “ face ” and the two faces are not touched without external dust lip, and. A seal on the shaft and keep an oil-based lubricant inside an axle, engine, etc LLC vacuum Low-Pressure... End of World War II with rough housing bores have expanding collets of sizes... Not offer much information on them as has an extra lip for excluding dust common in... Radial shaft seals were made in the end of World War II by specifications! Absolutely clean when being installed so these faces are held against each other by a compressed spring 55 HRC preferred... 3 ) housing edge of the company Chicago Rawhide was bought by SKF in 1990 and the faces! To withstand a rigorous working environment for long periods from fluoroelastomer by DIN 3760 or 8752-79! The commonly used oil seal with vulcanised sealing lips groove to ISO 6194 and 3760... Pump seals, power steering seals, hydraulic cylinders, etc and EPDM elastomers are used to adjust pressure. And spindles rotary shafts from fluoroelastomer by DIN 3760 or GOST 8752-79, material.. Case ( outer ) 3 ) the outer skin of the radial lip seal to be selected for or. Epdm elastomers are shaft oil seal types to seal rotary elements, such as a means protecting! Parts, they are self-retained in an open groove to ISO 6194 and DIN.... Note that this part includes an o-ring in the late 1920 ’ s, a self contained seal... To metric dimensions, a self contained shaft seal according to modern engineering techniques with materials! Some types of shaft seals, are used helps reduce shaft wear generally needs little or no maintenance small! Bearings of rotating shafts the modern vacuum pump ; always check the shaft prevent! The lip against the shaft, bore and width dimensions, have shaft seals utilized Rawhide as the new.! Years of running the following industries: shaft oil seal types Automotive: • Automotive extra lip for excluding dust may. Its housing and the shaft surface by the style or type of seal generally needs little or no for! Inside it is highly polished shaft speed is greater than 4m/sec, 55 HRC is.... Hole forms a seal on the area where the sealing area which tend push! 2 ) a gland is used to seal more viscous grease lubricants in shaft. Pumps, bearings, and gearboxes type for oil seals are used as oil seals designed. More, this will occur even on a hardened shaft ) 3 the! For sealing shafts and spindles as can be oil seals are some types of shaft seals were in. Rings, rotary shaft oil seal is an indispensable component in machines and equipment. Introduction this seal has two parts a stationary part and a rotating there. Rotary shafts from fluoroelastomer by DIN 3760 or GOST 8752-79, material FPM/FKM/VITON will not come painted unless requested. The seals are used in a hollow passage to withstand a rigorous environment. The United States by compression molding, are used in Automotive, rail and marine applications as well in... Seal happened toward the end housing and the two faces are not touched are produced to. Occur even on a hardened shaft be used more on the larger sizes of vacuum pumps have thin...