Selected page of Spherical Plain Bearings
r bc originated the precision ground single fracture spherical plain bearing and continues to be the leader in design and innovation listed below are the basic types of spherical plain bearings that rbc makes with pertinent selection criteria spherical plain bearing selection guide b-l b-lss mbmb-ss standard radial b-el b-elss mb-e mb-ess extended inner ring bh-l bh-lss mbhmbh-ss high misalignment b-lssq mb-ssq quadlube® b-lnmss mb-nmss self-lubricated duralubetm b-sa mb-sa angular contact b-dsa-3 mb-dsa3 double acting angular contact radial load reversing radial load uni-directional load thrust load reversing thrust load capability of misalignment max operating temp open 1 max operating temp sealed sensitivity to contamination re-lubrication corrosion protection adjustable clearance excellent excellent good good good good 500 250 low yes good no excellent excellent good good good good 500 250 low yes good no excellent excellent good good good excellent 500 250 low yes good no excellen
| featured product featured product the rbc quadlube® long life spherical plain bearing lubrication flow seal seal seal seal conventional spherical plain bearing rbc quadlube® spherical plain bearing the innovative design of the rbc quadlube® interconnecting lubricating groove system ensures a more efficient distribution of the lubricant by providing channels that transport the grease throughout the entire bearing including into the contact area of the bearing under load in cases of unidirectional load or when lubrication intervals are missed the groove system retains extra lubricant where it is needed for added margin of performance in the dirtiest of environments the grooves and channels capture any dirt or debris and keep these contaminants away from the raceway surfaces the rbc quadlube® long life spherical plain bearing maintains the same size capacity ratings as conventional bearings with the same envelope they can immediately replace conventional bearings without modifying housing
| spherical plain bearings high misalignment inch b ° c k 9 degrees for sealed bearings d d1 d r2 30° r1 series bh lss r1 shaft fillet max r2 hsg fillet max 0.032 0.032 0.032 0.032 0.032 0.032 0.032 0.032 0.032 0.032 0.032 0.044 0.044 0.044 recommended load limits 2 approx weight lb static radial lbf 84,800 115,400 150,900 191,000 235,500 285,000 339,500 398,700 463,000 530,400 603,700 764,800 943,600 1,177,500 recommended shaft diameter iso f6 slip fit iso m5 press fit max 1.2490 1.4990 1.7490 1.9988 2.2488 2.4988 2.7488 2.9988 3.2486 3.4986 3.7486 3.9986 4.4986 5.4983 recommended housing bore 3 iso r7 press fit max 2.4363 2.8112 3.1860 3.5610 3.9359 4.3734 4.7481 5.1231 5.4981 5.8730 6.2480 6.9979 7.7476 8.7475 static dynamic thrust radial lbf lbf 16,600 23,600 31,900 42,000 52,900 62,600 76,300 91,500 109,200 126,100 144,500 290,400 360,900 387,600 21,200 28,800 37,700 47,700 58,800 71,200 84,800 99,600 115,700 132,600 150,900 191,200 235,900 294,300 basic part number min 1.2484 1.4
| spherical plain bearings extended inner ring metric ° bckdd1 d 4 degrees 30° r1 r2 series mb e part number open mb17-e mb20-e mb25-e mb30-e mb35-e mb40-e mb45-e mb50-e mb60-e mb70-e mb80-e d inside diameter nom 17 20 25 30 35 40 45 50 60 70 80 d outside diameter b inner ring width tol 0.20 0.20 0.20 0.25 0.25 0.25 0.25 0.25 0.30 0.30 0.30 c outer ring width nom 10 12 16 18 20 22 25 28 36 40 45 k sphere dia sealed mb17-ess mb20-ess mb25-ess mb30-ess mb35-ess mb40-ess mb45-ess mb50-ess mb60-ess mb70-ess mb80-ess tol tol nom nom +0.000 +0.000 -0.008 -0.010 -0.010 -0.010 -0.012 -0.012 -0.012 -0.012 -0.015 -0.015 -0.015 30 35 42 47 55 62 68 75 90 105 120 -0.009 -0.011 -0.011 -0.011 -0.013 -0.013 -0.013 -0.013 -0.015 -0.015 -0.015 17 20 25 30 35 40 45 50 60 70 80 tol +0.00 -0.24 -0.24 -0.24 -0.24 -0.30 -0.30 -0.30 -0.30 -0.40 -0.40 -0.40 25 30 36 41 48 55 60 67 81 94 107 unmounted diametral clearance 0.05/0.15 0.07/0.17 0.07/0.17 0.07/0.17 0.07/0.17 0.07/0.17 0.07/0.17 0.07/0.17
| featured product featured product impacttuff ® advanced shock load protection the impacttuff® spherical plain bearing improves resistance to shock loads by 300 in many rugged applications where substantial impact loads are common spherical plain bearings can break and chip adding to the high cost of warranties in particular suspension components in off-highway construction vehicles have been subject to abuse from impacting rocks or abrupt terrain changes often the result is broken bearings resulting in costly machinery repair up to the challenge the real challenge of the case carburized design is being able to fracture the outer ring to facilitate assembly we designed a unique outer ring profile with a minimal notch exposure that permits controlled fracture through the softer inner core the ductile inner core provides a high degree of protection against the devastating effects of impact and shock loads impacttuff® technology can be incorporated into almost any traditional rbc spherica
| featured product featured product the rbc shimpack® b-dsa-3 double acting angular contact spherical plain bearing the rbc shimpack® double acting angular contact spherical plain bearing was developed to ease the installation procedures required on the assembly line traditionally the bearing assembly was completed clearance was measured and then the assembly was disassembled shimmed and reassembled with the rbc shimpack® double acting angular contact spherical plain bearing a spacer is preset and individually calibrated at the factory to provide the optimum amount of axial internal clearance x old method of shimming the cover plate has to be bolted down until all clearance in the bearing is eliminated and gap x measured the cover plate is then removed and shims added the housing begins to fret and deteriorate as the outer ring slides because of the loose fit the b-dsa-3 shimpack double acting angular contact spherical plain bearing ® the bearing is mounted with a press fit and cover pla
| spherical outer rings sealed metric ccdd 30° 30° r2 r2 series ormb series ormb ss part number open ormb12 ormb15 ormb17 ormb20 ormb25 ormb30 ormb35 ormb40 ormb45 ormb50 ormb60 ormb70 ormb80 ormb90 ormb100 ormb110 ormb120 ormb140 ormb160-9l ormb180-9l ormb200-9l ormb220-9l ormb240-9l ormb260-9l ormb280-9l ormb300-9l ormb320-9l recommended spherical dia of ball stud sealed max 19.000 22.000 25.000 30.000 36.000 41.000 48.000 55.000 60.000 67.000 81.000 94.000 107.000 117.000 134.000 143.000 160.000 187.000 206.000 234.000 265.000 286.000 306.000 333.000 360.000 375.000 380.000 d outside diameter nom 22 26 30 35 42 47 55 62 68 75 90 105 120 130 150 160 180 210 230 260 290 320 340 370 400 430 440 c outer ring width min 18.980 21.980 24.980 29.980 35.980 40.980 47.980 54.980 59.980 66.980 80.980 93.980 106.980 116.980 133.980 142.980 159.980 186.980 205.980 233.970 264.970 285.970 305.970 332.970 359.970 374.970 379.970 tol tol nom +0.000 +0.000 -0.009 -0.009 -0.009 -0.011 -0.011 -0.011 -
| industrial rod ends male shank heavy duty forging inch bcad1 d h1 h2 h g1 g series rem a head dia c head thickness h2 overall length h1 neck to center 1.000 1.000 1.125 1.125 1.187 1.187 1.375 1.375 1.750 1.562 1.562 1.750 1.750 2.187 2.187 2.187 2.375 2.375 2.375 2.687 2.687 2.687 3.000 3.000 3.000 diametral clearance approx weight lb recommended static load limit radial lbf thrust lbf 4,500 4,500 5,200 5,200 5,800 5,800 7,100 7,100 8,700 7,900 7,900 8,700 8,700 10,000 10,000 10,000 11,200 11,200 11,200 12,500 12,500 12,500 13,800 13,800 13,800 part number 2.062 2.062 2.375 2.375 2.687 2.687 3.312 3.312 4.000 3.625 3.625 4.000 4.000 4.625 4.625 4.625 5.250 5.250 5.250 5.875 5.875 5.875 6.500 6.500 6.500 0.562 0.562 0.656 0.656 0.750 0.750 0.937 0.937 1.125 1.031 1.031 1.125 1.125 1.312 1.312 1.312 1.500 1.500 1.500 1.687 1.687 1.687 1.875 1.875 1.875 4.031 4.031 4.562 4.562 5.093 5.093 6.218 6.218 7.406 6.812 6.812 7.406 7.406 8.625 8.625 8.625 9.812 9.812 9.812 11.062 11.062 11.0
| fa ps hardened spacer d d1 ps fa shaft design figure 18 reduce contact pressure by using a hardened and tapered spacer with the exception of bearings under light load and press fitted inner rings it is generally recommended that shafts or pins be heat treated to a surface hardness of hrc 55 min and have a surface finish of 32 rms under dynamic operating conditions and with a loosely fitted inner ring it must be expected that rotation takes place between inner ring and shaft under very heavy loads even an interference fit does not guarantee that the inner ring will not rotate on the shaft thrust loads on radial bearings are transmitted via the face of the inner ring the contact stress of this annular area should be checked against the yield strength in compression of the shaft material or any spacer which may be used even under static conditions it may be necessary to harden the shaft shoulder to prevent plastic deformation hardened spacers with a tapered od may be used if the shoulder
| applications traffic doors heavy duty extractors hinge pin heavy duty traffic doors common in warehouses and factories require b-sa radial load only and b-l bearings for the bottom hinges where substantial thrust loads are present suspension rod mb-l metric radial type spherical plain bearings are used in a heavy duty extractor in the textile industry in this particular application the bearings are used to take up the misalignment in the suspension rods 62
| innovation commitment quality rbc bearings has been producing bearings in the usa since 1919 in addition to unique custom bearings rbc offers a full line of standard industrial and aerospace bearings including spherical plain bearings radial angular contact extended inner ring high misalignment quadlube® impacttuff® spreadlock® seal crosslube® duralubetm milltufftm bearings and self-lubricating bearings available in inch and metric sizes rod ends commercial and industrial precision mil-spec series self-lubricating and aircraft sold under the heim® unibal® and spherco® brands available in inch and metric sizes thin section ball bearings standard cross sections to one inch sizes to 40 inches stainless steel and other materials are available seals are available on all sizes and standard cross sections ball bearings precision ground semiground unground high loads long life smooth operation nicetm ball bearings are offered in caged and full complement configurations self-lubricating bearing
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