Spherical Plain Bearings and Rod Ends for heavy-duty applications
28Pages

FLURO-Gelenklager GmbH SPHERICAL PLAiN BEARINGS AND ROD ENDS FOR HEAVY-DUTY APPLICATIONS

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...

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

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]

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 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...

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 =...

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...

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...

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...

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....

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...