For more than 30 years, RoHS-compliant iglide® plastic plain bearings have offered a technical and economic advantage over all types of metal plain bearings. We can produce small to very large bearings from bronze, stainless steel, and steel alloys with outer diameters up to 124” and assembly weights up to 35 tons. 1 relative to a prior art journal bearing 9 fabricated with a metal housing 11 and a maintenance free bearing 10 including a plastic load bearing layer as generally described hereinabove. For bearings and shoes, this self-lubricating material consists of a bimetal structure — a stainless steel support and a bronze sliding layer with small particles of graphite solid lubricant homogenously distributed. The self-lubricating segments of the shoes and the flanges of the bronze bearings are fixed with countersunk screws. Oilite bearings are manufactured in three standard materials. LUBRON AQ’s low friction and abrasion resistant properties help minimize wear and extend bearing life. A bearing clearance 6 is provided in the usual manner between the shaft 2 and the bearing surface of the bearing member 3. Both the porous member 1 and the sleeve member 3 can be suitably press-fitted into the bore 4 in the bearing block 7. LUBRON AQ self-lubricating bearings feature a combination of properties and capabilities unsurpassed by other maintenance-free bearings. 9. The method of claim 8, wherein said load bearing layer is selected from the group consisting of fluoropolymers, polyimide and aromatic ketones, and combinations thereof. Smoother finishes are normally required for harder materials, higher loads, and higher surface speeds. 2 is the side view of the described a kind of oil-less self-lubricating bearing of the utility model embodiment. Throughout this disclosure, the terms “self-lubricated” or “self-lubricating” shall refer to use of a material that exhibits sufficient lubricity to nominally eliminate the need for application of a discrete lubricant to a bearing surface. This invention relates to bearings, and more particularly to a maintenance free bearing having a lubricious wear layer that is resistant to creep. 11 S.Q. Niu, J.P. Zhu, J.L. OuYang: Study of Several High Temperature Self-lubricant Materials Vol. They offer a greater lifetime than the other bearings types an self lubricating bearing materials. A further objective of the present invention is to provide a self-lubricating bearing, wherein the bearing is made of bronze. Just enter your requirements, including design, load, speed, shaft material and housing, and instantly see how many hours each suitable material could last inside your application. Such bearings provide convenient means for rotatably, pivotably or slidably fastening multiple members to one another in a maintenance free manner. Advances in technology coupled with the need for energy-efficient and high-performance bearings in industrial equipment and machinery will further assist in the growth of the self-lubricating bearings market. Our range of oil-impregnated sintered bronze bushings is intended for use in maintenance-free operations, under moderately high speeds and low loads. 2. Bearing material according to claim 1, characterized in that the Kumtstoffmatrix besides PTFE also PEEK, PPS, PA, PVDF, PSU, PES or PEI individually or in combination. The article highlights a lower cost, easier-to-maintain machine component that eliminates the total cost of bearing lubricants: high-performance, dry-running plastic bearings. Bronze bearings are cast, machined & lubricated & are available with maximum pressure up to 1,000 psi at 800 degrees F temperature. When self-lubricating bearings are custom designed, you can specify what material and oil should be used, as well as the shape, tolerance, and assembly method that you require. The self-lubricating block, for example, uses a solid lubricant that is a mixture of polymers, oils, and select additives that reduce the penetration of dirt, grit, and liquids into the ball path, preventing premature failures. The creep and delamination problems may be addressed by roughening the metal backing surface, such as by sandblasting, etc., prior to application of the bearing surface. Applications with high loads and high speeds—these lead to excessive frictional heat build-up and wear. Oilite bearings are the most popular self-lubricating bearings in the UK, but they are also in high demand in Europe. Custom manufacturer of self-lubricating ball bearings, linear motion systems and components. Solid plugs of graphite are usually inserted into holes in the base bronze material. Oilless bearing , Oilless bush ,Graphite embedded bearing, self lubricating bearing, Non ferrous bearing , liners , wear pad etc. When circumstances necessitate field machining the lubricated bearing surface, consult a LUBRON engineer for specific recommendations.
36 Y.H. Xia, Z.R. Jin, J.G. Cheng: The Use of Gradient Self-lubricating Bearing Materials in Engineering Materials Vol. Total cost of ownership — While purchase price of a self-lubricating bearing might be 10 to 30 per cent higher than the cost of a bearing requiring manual lubrication, the reduced labour costs, elimination of need for lubrication assemblies, improved performance, and reduced downtime compensates for it. Poor lubrication is implicated in half of all bearing failures. 2. A bearing as set forth in claim 1 wherein the capillary flow suction action applied to the lubricant to cause it to flow into said bearing clearance is adapted to the relationship S12 >S13 >S3, wherein S12 is the suction capability of the bearing clearance between the shaft and the bearing surface means, S13 is the suction capability of said clearance between the shaft and the porous member, and S3 is the suction capability of the porous member. For more than 10 years, self-lubricating, or lube-for-life, designs have used oil-saturated polymers in linear bearing applications ranging from food processing to automotive assembly. For water treatment plant or any other industrial process using water, Thordon Bearings have been developed to offer an exceptional abrasion wear resistance. Thereafter, load bearing layer 114 may be applied to the tube in any convenient manner, such as, for example, by spray coating or dipping. In such cases, LUBRON AQ bearings can be furnished with one of several groove patterns to accommodate most types of loading, movement and lubricating requirements. The utility model relates to an oil-free self-lubricating bearing, which comprises a bearing body, the top end of the bearing body is provided with a bearing house; the bearing housing is internally provided with a steel ball, and a layer of self-lubricating layer is arranged between the steel ball and the inner surface of the bearing housing. The good mechanical properties of the sintered bronze along with the good sliding and lubricating properties of a PTFE mixture are optimally combined in the case of the GLYCODUR F slide bearings. The entire laminate is then preferably inserted into a conventional press under heat and pressure wherein load bearing layer 114 is provided with outermost surface 122 as shown in FIG. The material is then subjected to a heat treatment in an oven, in which the PTFE it contains is sintered at 380 ° C. for 3 minutes in order to achieve a final rolling step to produce the final composite and the required gauge block. The solution adopted — to implement the use of self-lubricating material replacing grease lubricated bearings and PTFE foil — has provided better safety for energy production in a sustainable manner following company concerns with the social and environmental aspects of its business. The material can be formed into many shapes and sizes including wear plates, rolled bushings, cylindrical bearings, spherical bearings, split bearings, sleeves, liners, guides and other customizable shapes. In the event that your requirements cannot be met by stock items, our bespoke service enables us to produce both bronze and iron Oilite bearings and customer specific structural parts that are specifically designed to meet individual requirements. The lubrication is consistently applied to the shaft surface. A 1989 report described the friction and wear at an elevated temperature (300°F-500°F) of several thermoplastics compounded with PTFE, other lubricants, and CF.70 The thermoplastic resins that were evaluated were PEEK, PEK, PES, and PPS. 2 and 3, the present invention comprises a bearing 110 having a backing or substrate 112 fabricated from a metallic or other material capable of providing bearing 110 with requisite structural integrity for an intended application. Deva.glide is a self-lubricating bearing material that consists of a high quality bearing bronze with solid lubricant pockets. Highly porous materials have a high stiffness combined with a very low specific weight due to very high porosities. I understand these are a composite construction bearing made from a combination of PFTE (better known as Teflon), Lead, Bronze, Steel and a copper plating, not being a metalurgist and these coming from china though, who really knows. ISO 9001:2000 & AS 9100B certified manufacturer & distributor of standard & custom bearings including oilless or self-lubricating bearings. Self-lubricating pillow block assemblies, open or closed, are commonly available for shaft sizes ranging between ½” and 1½”, with loads ranging from 250 to 4,000 pounds, but can be customized.
In general, suitable materials for forming the porous member 1 are loosely sintered balls of metal, plastic material, glass, ceramic or one or more other solid substances which are cemented together, welded together or sintered without pressure. Our bearings are capable of operating in wet or dry environments and extreme temperature conditions while carrying extremely heavy static and dynamic loads. Deva.metal® is a self-lubricating bearing material manufactured by advanced powder metallurgy. Briefly described, as shown in the drawings, the present invention comprises a self-lubricating bearing 110 fabricated as a laminate of a metallic backing, support or substrate 112, a series of raised structures 113 extending orthogonally therefrom, and a polymeric sliding, wear or load bearing layer 114 superposed thereover. Thus, raised structures 113 of the present invention, formed integrally with substrate 112 and embedded into load bearing layer 114 enable a relatively thick bearing layer 114 of low friction self-lubricating material to be utilized. Thus, advantageously, bearings 110 are provided with a relatively low coefficient of friction, long bearing life, resistance to creep and mechanical stresses, and are electrically and thermally conductive. Self-lubrication has several advantages over traditional lubricated bearings. In DE 41 05 657 AI only a metal fluoride-containing impregnation material is mentioned, which has 2% PbF 2 , but no metal oxide, which is not distinguished by improved cavitation resistance and wear resistance compared to the other exemplary embodiments not containing metal fluoride. This allows the bearing to provide their own lubrication during operation without requiring the application of grease or oil lubricant. Other important uses for copper and copper-base PM materials include friction materials, electrical parts, filters, additives to iron, aluminum powder alloying, catalysts, paints, and pigments. This product is an environmentally friendly Lead free compound bearing, a “perfect oil-less bearing” that does not require any lubricant at all uses polytetrafluoroethylene (PTFE) resin, has excellent low friction characteristics and also optimizes metal properties such as strength and dimensional stability. The AST650 series bushing material consists of strong cast bronze as a base material and is combined with solid lubricants. Various combinations of the materials already mentioned are used, plus bronze powder, metal oxides and sometimes carbon fibres. Maintenance-free sliding bearings comprising a metal support and a plastic layer are known. Igus® extensively tests its bearing materials and compiles that data into an online database called the iglide® Expert System to help you choose the best product. 6 L.Y. Yang, C.C. Li, S.R. Wang, Y.J. Wang, Z.M. Liu: Design of High Temperature Self-lubricating Bearing Vol. An improved bearing structure is described which includes a permanently magnetized porous body filled with an interstitial magnetic lubricant for extending the operational life of self-lubricating bearings. 26 C.C. Zhang, L. Wang, Z.W. Zhao: Study of New Al-based Bearing Materials Vol. METAFRAM® products offer a wide range of self-lubricating bearings in bronze and steel alloys. One significant reason for this slowing down of growth has been the miniaturization of many products such as CD and DVD players, memory sticks, computers, etc., requiring ever smaller PM bearings. 6. A bearing as set forth in claim 1 wherein said bearing clearance between the shaft and the bearing surface means is in a range of from about 0.021 to 0.039 mm. The roller bearings in the distributor mechanism of the units at Jupia are being replaced with self-lubricating bearing materials. Deva.glide® maintenance-free bearings, without the need for lubrication with oil or grease are recommended for large bearings. It is made of high quality low – carbon steel with bronze alloy of a particular formulation with high density with sintered bronze as it s interlayer, and inside with the compound of PTFE. Under the optimum conditions, this oil is drawn to the bearing surface creating a lubricated layer between the bearing and the shaft. In addition, the illustrated arrangement ensures that lubricant, for example oil, does not in normal operation escape from the bearing as the porous member 1 which performs the function of a lubricant store is arranged in the interior of the receiving bore 4, that is to say, it is screened or shielded from the exterior by the member 3. This means that the bearing does not require collecting means such as centrifuging rings and felt discs which are otherwise provided to collect any lubricant which may escape.
Oil-filled sintered bronze bearings were first conceived in the 1930s, with self-lubricating metal-polymer bearings developed around 1950 and lubrication-free solid polymer bearings appearing in the 1960s. It is also necessary to collect lubricant, such as oil, which escapes from the bearing, and felt discs or suitably shaped centrifuging rings are used for this purpose. A wide range of lubricants are available to meet specific requirements within a temperature range of -60°C to 200°C, lubricant additives are also available to impart anti-wear properties in marginal lubrication conditions. A precise analysis of space requirements is critical to specifying self-lubricating bearings. Self-lubricating bearings eliminate the need for maintenance , lowering labor costs, and increase the service life of aerospace applications. The clearance for bearings moving in a to-and-fro motion should be the smallest possible (0.5-1 ‰). In high temperatures, the clearance should be larger than normal. Where split housings or a need for disassembly and reassembly make split bushings advantageous, LUBRON AQ bearings are available either matched (split before final machining providing perfect 180° halves) or unmatched (split after final machining varying slightly from perfect 180° halves). The sintered bronze layer also helps conduct heat away from the bearing surface. Meet your powder metal bearings needs. We can find Thordon Bearings on many applications in the field of transportation, like self-lubricating bushes for hinges and pulleys for trucks and special vehicles. The invention is based on the knowledge that the performance under lubrication-free conditions can be significantly increased if a certain filler combination is used in conjunction with PTFE, which has PbO and metal fluoride. Some of this discussion was presented earlier in Section 7.4.3. Some studies of wear and friction control temperature to a specific level (usually room temperature”), some report temperatures, and some studies report nothing. Even though LUBRON AQ bearings are extremely durable, care must be taken to ensure that the lubricated bearing surfaces are not damaged before or during installation. 11. Bearing material according to one of claims 6 to 10, characterized in that the solid lubricants are MoSj or boron nitride. The bearings of the present invention are more resistant to mechanical stresses than standard NG. In this regard, bearings of the present invention were fabricated using a steel substrate 0.8 mm thick with bronze intermediate layer 116 and PTFE bearing layer 114 of the dimensions shown and described hereinabove with respect to FIG. These bearings are solid or hollow cylinders, to be machined to final dimensions when the system is not ready for standard SELFOIL® bearings. Specified and approved by engineering design firms and water power authorities worldwide, LUBRON AQ bearings are the proven choice for hydro pump-turbine and dam gate applications. Stainless roller wheels are also available from Lubron Bearing Systems in combination with self-aligning spherical bearings. Friction coefficient is 0.03~0.15. As shown in Figure 1 & 2, the coefficient decreases with load but increases under low temperature. Temperature — Vendors will rate their bearings for operation in certain ranges. Furthermore, the arrangement illustrated ensures that the bearing clearance 6 between the shaft 2 and the member 3 is not sucked empty of lubricant by the suction effect of the porous member 1, after assembly of the bearing or when the shaft is stationary or rotating at low speeds. Accurate alignment is particularly important for self-lubricating bearings. This kind of material provides a maintenance-free solution and is particularly good for high load and intermittent of oscillating motion. The porous bronze layer is impregnated with a polymer such as PTFE (polytetrafluoroethylene), with a top layer or lining of polymer disposed thereon. LUBRON AQ spherical bearing assemblies consist of an inner component (gimbal) with a cylindrical inside diameter for shaft rotation and a spherical convex outside diameter, and a two-piece outer component (race) with a mating spherical concave inside diameter and a cylindrical concave outside diameter for mounting in a housing. G-METAL cylindrical bearings can be made from 8 mm to 280 mm in diameter. Wear is a surface phenomenon that results in the gradual deterioration of contacting surfaces through friction. There are three types of self-lubricating plain bearings used today. The utility model relates to a kind of oil-less self-lubricating bearing.
Also, the current design of the oil channels formed on the circumference of the present bearing produces an effective cooling circulation for the lubricating oil, whose degradation can be prevented or lessened and which can greatly reduce the heat generated during the rotation of the shaft. Such maintenance free bearings may comprise a variety of configurations, such as, for example, bushes or journal bearings, thrust bearings or washers, locating pads, valve port plates, and wearing components for a variety of mechanisms. The bushings shall be composed of supporting metal and a solid lubricant suitable for underwater application. In the original turbine design, the regulating ring assembly had an axial thrust bronze block fixed to its bottom surface, which slid in a channel full of oil. RBC Lubron is a subsidiary of RBC Bearings Inc. LUBRON TF bearings are constructed of woven PTFE fabric liners permanently bonded and mechanically locked to rigid bronze or stainless steel backings. Porous, sintered metal impregnated with solid lubricants. A felt wick is machined into the ID of the bearing that is intended only for use with oils—when using grease, remove the felt wick to create a reservoir for the grease lubrication. 32 G.M. Zhou: Study of Solid Self-lubricant Bearing Vol. The original bearings for Jupia were bronze lubricated with grease, and a seal was installed only on the upper bearing. Using similar techniques and manufacturing equipment as structural PM components, porous and cellular PM materials are commonly sintered to densities between 25% and 85% of theoretical mean density (TMD) while structural PM parts are typically 85%-99.9% of TMD. Used in crusher, screw conveyor, steel mill, spindle, shafting and self-lubricating applications. 12. Bearing material according to one of claims 6 to 11, characterized in that the thermosets or high-temperature thermoplastics are polyamideimides or polyimides. The self-lubricating compound shall be integrally molded and compressed into recesses provided for containment, with an additional coating up to040 inches (1 mm) applied to 100% of the bearing surface area. We are able to offer Oilite bearings in sealed plastic bags or boxes. Sintering of powders is used commercially to produce porous metals by Schunk Sinter Metals (). With larger pores, these can be used to control air flow as filters or silencers, and with smaller pores they can form self-lubricating bearings. Fine particles of solid lubricant create lubrication film on the motion part, when friction is occurred, and the bearing can achieve excellent self-lubrication and abrasion resistance under dry lubricating condition. This provides a reduced concentration of low friction material close to the backing metal. Self-lubricated operating dry, or water lubricated, they cancel the pollution risks and notably reduce the maintenance costs, offering a lifetime higher than the other materials used as bearing bushes. Self-lubricating bearings form part of our extensive range, which also includes metal polymer bearings, pot bearings, elastomeric bearings, pipeline bearings, bi-metallic bearings, and so on. We invite our customers to let us know what their needs and requirements are so that we can cater to them with an appropriate product. One solution is to avoid glue completely and create a mechanical link, that is, to hot-press the lubricant into a shallow surface layer of porous bronze. 17. The method of claim 15, wherein said load bearing layer and said adhesive are fabricated as a monolayer comprising a polymer blend. The bearings are secured in the sheet metal plate on both sides after fitting. For most applications, the recommended bearing loads listed in Table 1 will provide a safety factor of at least 3. LUBRON AQ bearings, which combine high strength alloys with tough, resilient lubricants, are designed to withstand heavy loads. The main reasons re-lubrication maintenance practices fall short include lubrication not being properly or consistently administered; lubrication points not being easily accessible; maintenance personnel not being properly trained and incorrect or improper quantity of lubricant being used. These bearings are made with a mixture of thermoplastic materials, embedded reinforcing fibers and solid lubricant. Copper is exceeded only by silver among the materials used for electrical applications. Self-lubricating bearings work by having lubricant impregnated within the sliding layer of the bearing. Another further objective of the present invention is to provide a manufacturing process for making self-lubricating bearings comprising the following steps: the forming step is to place processed particles of a multiple of alloys evenly to a multiple of round cavities provided in the molding mold made of low heat expansion coefficient material and each center of the cavity is provided with a core bar made of low heat expansion coefficient material so as to form a hollow cylindrical green body; the sintering step is to place the molding mold with a multiple of hollow cylindrical green bodies into a sintering furnace with flowing protective atmosphere, which is then heated below two thirds of the melting temperature of the alloy’s main constituent for 10 to 20 minutes, such that the spherical alloy particles can be sintered together and form a sintered body with large pores; the shaping step is to place the hollow cylindrical sintered bodies after cooling down into the cavity of a steel extruding mold and extruded therein to shape the sintered bodies into semi-finished bearings with satisfactory roundness, surface roughness, and concentricity; and the oil-impregnation step is to soak the multiple of the semi-finished bearings into a container filled with liquid lubricant, such that the multiple of pores among the spherical alloy particles absorb lubricant and store it therein, and finally the soaking bearings containing rich oil are retrieved from the container to become self-lubricating bearings.