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- Spherical Plain Bearings and Rod Ends for heavy-duty applications
Spherical Plain Bearings and Rod Ends for heavy-duty applications
Spherical Plain Bearings and Rod Ends for heavy-duty applications
FLURO-Gelenklager GmbH specializes in spherical plain bearings and rod ends, adhering to DIN ISO 12240-1 standards. These components accommodate circular and tilting movements, compensating for misalignments. The FLUROGLIDE® technology is developed for high-risk applications under dynamic loads.
FLUROGLIDE® bearings offer high load capacity, resistance to changing loads, and low stick-slip tilt. Performance charts compare the coefficient of friction and working life against competitors.
The document outlines various series of spherical plain bearings and rod ends, including maintenance-free options, categorized under DIN ISO standards for radial, angular, and axial bearings, and cylindrical sliding bushings.
Load Ratings: Dynamic (C) and static (Co) load ratings are crucial for service life, depending on material-specific load factors and the bearing's functional area.
Internal and Operating Clearance: Radial and axial clearances are specified, with maintenance-free bearings requiring no radial clearance.
Bearing Design: Recommendations for selecting bearings as locating or floating bearings emphasize fit and material hardness.
Proper handling and installation are critical for warranty and performance. Bearings should be stored in clean, dry areas and installed with appropriate tools. Maintenance-free bearings should not be lubricated.
Service life calculations are based on testing and theoretical models, aiding in selecting suitable bearings for specific applications.
Working life is influenced by bearing selection, impacts, corrosion, installation, load type, contaminants, and seal functionality, measured in oscillations or operating hours.
Friction in maintenance-free bearings is affected by tribological pairing, load, sliding speed, and temperature. Friction decreases with increasing load and is crucial during the run-in phase.
Bearings experience constant, composite, radial, and axial loads. Formulas for calculating equivalent loads emphasize matching specific bearing loads to operating conditions.
A step-by-step process for calculating theoretical service life includes load, bearing pressure, glide/wear distance, sliding speed, and factors like temperature and movement. An example for a crane manufacturer is provided.
- Friction moment: M = p x µ x dk x 5 x 10-4
- Load calculation: p = X x fr X = 0.97 x 26.565fa/fr
- Bearing pressure: p = 300 x p/c
- Sliding speed: v = 2.91 x 10-4 x dk x ß x f
- Service life: l = s x f x f1 x f3 x 10 / v x f2
Specifications and data for Series E, G, and C, and rod ends are provided. Bearings are designed for high load applications and are maintenance-free due to FLUROGLIDE® technology.
Bearings are made from high-quality bearing steel 100Cr6, hardened, ground, polished, and chrome plated. Outer rings are phosphated and bonded with FLUROGLIDE®. Stainless steel options are available.
- Series E: Suitable for high unidirectional or variable loads, with split shell design for sizes up to 120.
- Series G: Offers a larger tilting angle with a wider inner ring, similar to Series E.
- Series C: Designed for high loads with dynamic load ratings, requiring additional securing for higher loads.
Rod ends in Series E are made from heat-treated steel, galvanized, and feature a maintenance-free spherical plain bearing with a sealing system.
Includes tables with static and dynamic load ratings, tilting angles, and weights for each bearing size, along with tolerances and dimensions.
Recommended for high radial and axial loads, emphasizing securing outer ring halves for Series C under high load conditions.
Designed for high axial loads with a hard chrome/FLUROGLIDE® mating surface, making them maintenance-free. Housing and inner disks are made from bearing steel 100Cr6.
Standardized machine parts according to DIN ISO 4379, capable of absorbing higher forces than conventional bearings, made from bearing steel 100Cr6 with FLUROGLIDE® bonded to the inner surface.
Details required include radial and axial loads, load direction, frequency, and movement type, considering environmental conditions.
Used in railway vehicles, loading cranes, shear lifting tables, transportation systems, construction machines, and shipbuilding.
FLURO-Gelenklager GmbH is located in Rosenfeld, Germany, inviting visits to its manufacturing plant.
Catalog excerpts
FLURO-Gelenklager GmbH SPHERICAL PLAiN BEARINGS AND ROD ENDS FOR HEAVY-DUTY APPLICATIONS
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Introduction According to DIN ISO 12240-1, radial spherical plain bearings are standardized, ready-to-fit machine parts. Spherical plain bearings can perform circular movements, i.e., movements in circumferential direction (pivoting or rotating movements) and/or movements perpendicular to the bearing axis (tilting), all of which can compensate for misalignments and manufacturing inaccuracies as well as settling occurring in foundations. FLURO® has over 35 years of experience in the development and manufacture of spherical plain bearings and rod ends. To meet increasing customer requirements with...
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Eve^ry care has been taken to ensure the accuracy of the information in this catalog. However, no liability can be accepted for any errors or omissions. Due to continuing technical advances, we reserve the right to alter our products without notice. FLURO-Gelenklager GmbH
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Performance Charts pressure stability of fluroglide® running time [%] Surface pressure [n/mm²] Working life comparison Coefficient of friction of FLUROGLIDE® at different surface pressures µ-normal operating phase µ-nominalbetriebsphase µ-run-in phase µ-einlaufphase Surface pressure [n/mm²]
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Designs / Series Product Overview Spherical Plain Bearings DIN ISO 12240-1 Series C Maintenance free Maintenance free Spherical Plain Bearings DIN ISO 12240-1 Series G Maintenance free Spherical Plain Bearings DIN ISO 12240-1 Series E Maintenance free Rod Ends DIN ISO 12240-4 Series E with Male Thread Maintenance free Rod Ends DIN ISO 12240-4 Series E with Female Thread Maintenance free Cylindrical Sliding Bushing DIN ISO 4379 Maintenance free Axial Spherical Plain Bearing DIN ISO 12240-3 Maintenance free Angular Spherical Plain Bearing DIN ISO 12240-2 The main dimensions and tolerances of the...
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The load bearing capacity of spherical plain bearings is defined by the bearing manufacturer with the dynamic load rating C and the basic static load rating Co and is not content of DIN ISO 12240. The load rating comparison of spherical plain bearings from different manufacturers is only viable if the bearing dimensions, the tribological pairing and the calculation method are identical. Dynamic Load Rating C - This is a characteristic value for the calculation of the theoretical service life when used under dynamic load conditions. For maintenance free bearings, each repeat movement is considered...
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The radial clearance and the operating clearance of a bearing consists of the radial displacement of the inner part (inner ring, shaft, bolt, etc.) in the outer ring (sliding bushing) on the Y-/vertical axis. The radial clearance in spherical plain bearings are manufacturer-specific and should primarily provide optimum functionality. The addition of production, form and position tolerances means the radial clearance is specified in the tables for the series E, G and C. Maintenance free spherical plain bearings require no radial clearance for layers of lubrication film. At radial clearance = 0,...
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Appropriate measures must be taken to ensure the pivoting, tilting or rotating movements always take place between the functional surfaces of the bearing. Due to the relatively low friction values of maintenance free bearings, looser fits for housing and shaft/ bolt can be used. With regard to load share and load angle in the spherical plain bearing and especially in variable load applications, tighter fits are the better solution. Selection as Locating Bearing Housing and shaft fits must be in accordance with the installation recommendations. If looser fits must be selected due to installation...
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Assembly and Disassembly Measures Spherical plain bearings and sliding bushings are precision machine parts. Trouble-free performance requires careful handling prior to and during installation. the warranty is voided by installation errors. When delivered, the bearings are preserved and can be taken directly out of the box and installed where needed. Do not alter the delivery condition and leave the bearings in the packaging until ready to install. The bearings should be stored in clean, dry areas. figure 2: Centering chamfers For the prevention of corrosion, make sure the bearings are handled...
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Assembly and Disassembly Measures The mounting forces increase when the bearing dimensions increase. Appropriate assembly and reassembly options must therefore be provided as early as the design stage. ! if split outer rings are installed, align the separation point approximately 90° to the direction of the main load. The outer ring of the large spherical plain bearings GE...CW is screwed on one side. Having the screw/ bolt pattern face the mounting side may facilitate a possible bearing replacement. The threaded holes for eyebolts according to DIN 580 in the end faces are provided for handling...
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Service Life and Working Life Service Life and Working Life A variety of test bench and laboratory experiments under different load, motion ratios and conditions are the basis for the service life and the theoretical calculations. The efforts to make the tests as practical as possible are faced with natural limits, so that theory and application experience must be merged. Whether the user or FLURO® carries out the calculation, the specifications (page 26) must list the complete technical data. The calculation of the theoretical service life definitely delivers comparable bearing benchmarks. These...
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Service Life and Working Life Development focused on an optimized run-in phase of the spherical plain bearing value to achieve an extension of the normal operating phase. Range: p = 1 -300 N/mm² s = 1500000 / 1.0219p to p ≤ 100 N/mm² s = 800000 / 1.0155p from p ≥ 100 – 300 N/mm² Increased friction values are synonymous with increased wear in the run-in and run-out phases. A constant coefficient of friction in the normal operating phase reflects the linear wear, which is the result of a trouble-free, properly functioning intrinsic bearing tribology, effected by the continuous replacement of used...
Open the catalog to page 12All FLURO®-Gelenklager GmbH catalogs and technical brochures
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- Metal bushing
- Plastic plain bearing
- Plastic bushing
- Steel plain bearing
- Steel rod end
- PTFE plain bearing
- Bronze plain bearing
- Female rod end
- Male rod end
- Joint
- Stainless steel bushing
- Cylindrical bushing
- Maintenance-free plain bearing
- Radial plain bearing
- High-performance plain bearing
- Steel bushing