Angular Contact Ball Bearings 40° - LaakeriCenter

1 Angular Contact ball Bearings 40 / ELLooccaattiioonn wwiitthh TTrraaddiittiioonnThe headquarters in Solms-Oberbielis centrally located in Germany close to the North/South and East/West highways whichalso provides for a central location in international Airport Frankfurt km away serves as a worldwide aanndd RReelliiaabblleeIn the middle of 1996 we opened the central computer controlled high shelf warehouse withmore than pallet is used for finsihed andsemi-finished products as wellas for large is in addition to our existingtwo-storage computer controlledservice warehouse also with more than storage warehouse systemsprovide together with our distribution centre and communication network preciselogistics and a worldwideunequaled wwiitthh are future have the creativity and vision to perform and iiss oouurr eexxaacctt pprreesseennttaattiioonn ttoo ssoolluuttiioonnss wwiitthh of the IBC W lzlager GmbH at the industrial area of Solms-OberbielPrecise Logistics provide an unequaled worldwide reliabilityNew plant in AsslarCentral Computer Controlled High Shelf Warehouse Middle 1996 IBC INDUSTRIAL Bearings AND COMPONENTS3 Single Row Angular Contact ball Bearings of series BEwith 40 Contact angle To meet all the different technical applications and operatingconditions, accurate solutions are required.

2 Only an extensiverange of Angular Contact ball Bearings fulfil the diversity ofrequirements such as high rotational speed and load carryingcapacity, running accuracy, stiffness, as well as combinedradial and axial load at low heat Row 40 Angular Contact ball Bearings can accommo-date radial and axial loads in only one direction.(> See picture 44-101)Load acting of 40 Angular Contact ball bearing44-101 Also external radial loads are creating axial force within thebearing, which has to be compensated by a further there are two Angular Contact ball Bearings adjustedagainst each are typical fields of applications with combined radialand axial load within gears, gear motors, fans, compressors,screw compressors, ventilators, pumps, textile machines,printing machines, conveyors where shaft guidance free ofclearance should be marks of IBC 40 Angular Contact ball bearingsare quiet running, low friction, high rotational speed and along lifespan.

3 Especially usage in pumps or compressors arecreating combined loads at high rotational speed often underunfavourable lubrication circumstances and heavy 40 Angular Contact ball Bearings of BE series, with eachone high and one low shoulder at the bearing rings are non-separable. In comparison to series B, load carrying capacitycould have been increased due to larger larger the axial load carrying capacity the larger the sizeof Contact angle, which is including the conjunction line ofboth Contact points between balls and raceways with the radi-al axis and from which the load is transferred from one race-way to the main dimensions of the IBC single row Angular contactball Bearings are according to DIN 616, ISO 15 and DIN 628,part Angular Contact ball Bearings are available in variousdesigns. 70BE, 72BE, 73BE (> see picture 44-102). Furthervariations with other preloads are deliverable on of cross sections of 40 Angular Contact ball Bearings44-102 MaterialsBearing rings and rolling elements are made of bearing steel100Cr6 ( ) corresponding with SAE52100 and treatmentIBC Angular Contact ball Bearings are dimensionally stableand can be used at operating temperatures of up to 130 C.

4 Inaddition to higher values heat treatment for higher tempera-tures are available on on bearing design and size, various types ofcages are window cage Polyamide glass fibre reinforced, applicable up to 120 CMSolid brass cageJ Steel sheetK PEEK cage, glass fibre reinforced, applicable up to 200 C, in case of high rotational speed up to max. 150 CCage designs44-1034 IBC W LZLAGER GMBHR emarks:If the Bearings are lubricated with oil, any additives containedin the oil may reduce the cage service life. At tempera-tures over 120 C steel cages, PEEK or brass cages shouldbe using in ammonia surroundings such as freezing-appa-ratuses, Bearings with brass cages are not versionsIBC supplies types of Angular Contact ball Bearings , which aresealed on both sides. The Bearings are filled with lithium soapgrease with mineral basic with special grease are recognized by suffix. IBCsupplies also Angular Contact ball Bearings with shields orseals on one or both sides.

5 Bearings with basic sealing(2 RSZ) can be used within a temperature range between 10 C up to +120 C. Sealing with fluor caoutchouc (Viton) isavailable on open bearingsAlso open Bearings could already be delivered with are recognized by bearingsBearings with ceramic balls made of silicon nitride Si3N4areapplicable for current to low specific weight of ceramic balls and the resultinglow centrifugal forces, an increase in rotational speed of up to35 % is possible in comparison to steel balls. Thus the dynam-ic load rating is kept and the static load rating is reduced to70 %.Coated Bearings (Prefix AC)ATCoat enables a bearing to be higher resistant against cor-rosion, wear and allows an increase of speed. This is causedby thin dense chromium coat. The special topographic surfacealso increases the ability of a bearing to withstand emergencysituations. All these characteristics lead to use ATCoated IBCbearings under uncomfortable lubrication conditions are for example explained below: when it is impossible to use a lubricant, when it is only possible to use a low viscous lubricant,which cannot create a separating film, when movement is not a complete rotation, where the lubri-cant film will not remain, when the bearing is unloaded and the rolling elements startto slide, when in case of high acceleration or braking the rolling ele-ments start so ATCoat Bearings are an opportunity to corrosion resistantbearings.

6 The protective coat in connection with ceramic ballsprovides very good technical features (prefix ACC).Designs1) Single bearingsSingle Bearings are suitable where only one bearing per bear-ing location is used. These single Bearings are positioned in acertain distance to each specially defined tightening torque via a locknut or a flangemakes adjusting of preload or axial clearance. In case of suchbearing arrangements single row Angular Contact ball bear-ings have to be adjusted against each other until the neces-sary preload or axial clearance is reached. The right adjust-ment of both single Bearings is quite essential to guaranteethe bearing s functionality. Otherwise lifespan would bereduced caused by higher friction loss and thus resultinghigher operating temperatures. Even running noises or move-ment between balls and raceway may occur and thus com-plete load carrying capacity could not be fully ) Universal Bearings for mounting in pairsSingle row Angular Contact ball Bearings for universal designare intended for mounting in pairs in T-arrangements (tandem)in such cases when load carrying capacity is not sufficientenough, respectively the bearing arrangements have to carryaxial load in both directions (O- or X-arrangement).

7 The uni-versal Bearings have a defined ground stick-out S at thelateral faces of the inner and outer ring. This enables adjust-ment without shims.(> See Picture 44-104 a) with positive and b) with negativeclearance, which means preload.)44-104 Axial clearance and preload classes are given in the table onpage 5. The sequence of letters A, B, O, L, M signifies theamount of high axial play to medium aPicture bIBC INDUSTRIAL Bearings AND COMPONENTS5 The mentioned figures show the non-mounted bearingarrangements of two Bearings without measuring ground Bearings show the same protruding dis-tance of inner to outer ring on both sides and therefore areapplicable for any O-, X- or of axial load in both directions enables O-and X-arrangement. Due to Contact lines meeting in apexesoutside of the two Bearings , O-arrangement is more suitablefor accommodation of tilting moments, considering that bear-ing sets in such arrangements result in a relatively rigid bear-ing arrangement.

8 Comparing to O-arrangement, the contactlines of X-arrangement are converging within the two the above, the X-arrangement is less case of main load in one direction Bearings could bemounted in tandem arrangement. In case of occasionalchange of load direction a counter acting bearing would benecessary. (Please refer to column radial clearance and pre-load .) bearing arrangements44-105 InclinationMisalignment should be avoided. According to arrangement atmax. 2 Angular minutes. Inclination is leading to a certainseizure, higher running noise and reduces X-arrangement is less delicate than and preloadUnder appropriate operating conditions and reference speed,very low preload is optional to reach regular and free rolling of elements. Perfect rolling is granted with load distributionFa/Fr > means, in stationary (cold) conditions, Bearings are usedwith minimum internal clearance as under operating condi-tions the inner rings are warming up more than the outer ringsand thus clearance is becoming smaller, respectively preloadis becoming fits for shaft and housing are using up further case of high operating clearance, load capacity of the bear-ings is not completely case of unidirectional load in O-and X-arrangement, furtherconsiderations should be counter Bearings should not mainly be discharged tem-porary, as within the discharged bearing unfavourable slidingof balls may happen.

9 This may influence the noise, lubricantfilm, load on cage and lifespan. Light preload or a clearancefree solution should be arrangements with axial clearance and axial preload44-200O-arrangementX-arrangementT andem-O-arrangementTandem-arrangementa) with axial clearance:in O-arrangementaxial preloadaxial clearancein X-arrangementb) with axial preload:in O-arrangementin X-arrangementaxial preloadaxial clearanceBore [ m][ m][ m][ m][ m][ m]10 1872312319116 22 6 4 12 8 1673332521138 44 8 6 14 10 187038302113400 4 2 10 6 1418 3072403223156 22 6 4 12 8 1673423425178 44 8 6 14 10 187047392517400 4 2 10 6 1430 5072494127196 22 6 4 12 8 1673514329218 44 8 6 14 10 1850 8072604834229 33 9 6 18 12 24736250362411 55 11 8 20 14 2680 12072675538269 33 9 6 18 12 24736957402811 55 11 8 20 14 26120 18072736141299 33 9 6 18 12 24737563433111 55 11 8 20 14 26180 250729074513512 44 12 8 24 16 32739276533714 66 14 10 26 18 3444-201 Axial clearance and preload of IBC 40 Angular Contact ball Bearings (pair arrangements)6 IBC W LZLAGER GMBHFits for point and circumferential loadsFits mainly influence the clearance or preload and thus thefollowing information should be observed.

10 First of all it has tobe detected which rings accommodate rotating load undwhich point load. Rings with point load are less critical, asthey are only lightly clamped on the counter part. In this way acertain area of the ring diameter is always loaded. The largerthe shocks and load are, the stronger the fits should point load und circumferential load (> see picture 40-300).Point load and circumferential load40-300 The light fits are used for lighter loads each up to C,thetighter for higher load fits and temperature drop between the inner and outerring result in reduction of radial and axial clearance and hasto be considered fits should be adjusted according to the required preloadwhen operating temperature is reached. For hollow shafts andthin-walled housings stronger fits should be factorfor radial clearanceis approximately x of radial clearance by fits and operating conditionsThe radial clearance is approximately reduced by the follow-ing equation:Sreff= So (Sint+ ST)[mm][ ] Sreff Effective radial operational clearanceSoClearance before mountingSintReduced clearance due to interferenceSTReduced clearance due to temperature differences between inner and outer ringAfter mounting the following clearance appears:Sm= So Sint[ ]Sint= Inti fi+ Into fo[mm][ ]IntiInterference inner ringIntoInterference outer ringfiReduction factor inner ringfoReduction factor outer ringGuidelines:fiSolid or cast iron metal foare depending on roughness and diameter of bearingrings, respectively the diameter of the hollow shaft.