Transcription of Fits and Clearances - bearing
1 Ref: FCPG/C/E/E/ in EnglandPocket GuideFits and ClearancesUKNSK UK LTD.,NORTHERN ROAD, NEWARKNOTTINGHAMSHIRE,NG24 2 JFTel: +44/ 1636 605123 Fax: +44/ 1636 602775e-mail: FRANCE DE L EUROPE,2 RUE GEORGES GUYNEMER,78283 GUYANCOURT, CEDEXTel: +33/ 1 30 57 39 39 Fax: +33/ 1 30 57 00 01e-mail: DEUTSCHLAND GMBH,HARKORTSTRASSE 15,40880 RATINGENTel: +49/ 2102 4810 Fax: +49/ 2102 4812290e-mail: ITALIA GARIBALDI 215, 20024 GARBAGNATE,MILANESE (MI)Tel: +39/02 995 191 Fax: +39/02 990 25 778e-mail: ISKRA AND MARKETING OFFICE,UL. WARSZAWSKA 146, 25-547 KIELCETel: +48/ 41 330 38 07 Fax: +48/ 41 330 38 30e-mail: NORWAY OFFICE.,OSTRE KULLEROD 5,N-3241 SANDEFJORDTel: +47/ 3329 3160 Fax: +47/ 3342 9002e-mail: SPAIN, TARRAGONA, 161 CUERPO BAJO,2A PLANTA, 08014 BARCELONATel: +34 932 89 27 63 Fax: +34 934 33 57 76e-mail: RULMANLARI ORTA DO U TI.,YALI MAH. FEVZI CAKMAK CAD.,CAGLAR APT. NO 11/4,MALTEPE, ISTANBUL, 34844 Tel: +90/ 216 442 7106 Fax: +90/ 216 305 5505e-mail: JAPAN BLDF.
2 , 6-3,OHSAKI 1-CHOME SHINAGAWA-KU,TOKYO 141-8560 Tel: +81/ 03 3779 7680 Fax: +81/ 03 3779 7433 EUROPEAN SALES OFFICES AND JAPAN70424 F& 6/27/06 10:18 AM Page 11 Fits and Internal ClearancesFitsImportance of Proper FitsIn the case of a rolling bearing with the inner ring fitted to theshaft with only interference, a harmful circumferential slippingmay occur between the inner ring and shaft. This slipping ofthe inner ring, which is called creep , results in acircumferential displacement of the ring relative to the shaft ifthe interference fit is not sufficiently tight. When creep occurs,the fitted surfaces become abraded, causing wear andconsiderable damage to the shaft. Abnormal heating andvibration may also occur due to abrasive metallic particlesentering the interior of the is important to prevent creep by having sufficient interferenceto firmly secure that ring which rotates to either shaft orhousing. Creep cannot always be eliminated using only axialtightening throughout the bearing ring faces.
3 Generally, it is notnecessary, however, to provide interference for rings subjectedonly to stationary loads. Fits are sometimes made without anyinterference for either the inner or outer ring, to accommodatecertain operating conditions, or to facilitate mounting anddismounting. In this case, to prevent damage to the fittingsurfaces due to creep, lubrication or other applicable methodsshould be F& 6/27/06 10:31 AM Page 13 LoadConditionsFitsInner RingOuter RingInner RingOuter RingBearing OperationRotatingStationaryStationaryRot atingRotating InnerRing LoadStationary OuterRing LoadLoose FitTight FitStationaryRotatingRotatingStationaryR otating OuterRing LoadStationary InnerRing LoadTight FitLoose FitRotating orStationaryRotating orStationaryDirection ofLoadIndeterminateTight FitTight Fit70424 F& 6/27/06 10:31 AM Page 32 Fits and Clearances Pocket GuideLoading Conditions and FitsLoad ApplicationDirection of load indeterminate due to variation of direction or unbalanced loadLOADS tationaryLOADR otatingLOADS tationaryLOADR otating70424 F& 6/27/06 10:31 AM Page 25 Tolerances forHousing BoresAxial Displacement of Outer RingRemarksP7N7 ImpossibleGenerallyImpossibleIf axial displacement of the outer ring is not required.
4 For heavy loads, interferencefit tight than K is used. Whenhigh accuracy is required,verystrict tolerances should beused for fitting. M7K7 PossibleAxial displacement of outer ring is (J7)Easily PossiblePossibleImpossibleEasily PossibleH7H8G7JS6 (J6)GenerallyImpossibleK6M6 or N6H670424 F& 6/27/06 10:31 AM Page 54 Fits and Clearances Pocket GuideFits between Radial Bearings and Housing BoresExamplesSolid HousingsSolid or SplitHousingsSolidHousingsRotating OuterRing LoadDirection ofLoadIndeterminateRotating InnerRing LoadRotating InnerRing LoadDirection ofLoadIndeterminateHeavy Loads on bearing in Thin-Walled Housing orHeavy Shock LoadsAutomotive Wheel Hubs(Roller Bearings) CraneTravelling WheelsNormal or Heavy LoadsAutomotive WheelHubs (Ball Bearings),Vibrating ScreensLight or Variable LoadsConveyor Rollers,Rope Sheaves,Tension PulleysHeavy Shock LoadsTraction MotorsLoad ConditionsNormal or Heavy LoadsNormal or Light LoadsPumps, CrankshaftMain Bearings,Medium and LargeMotorsLoads of all KindsGeneral BearingApplications,Railway AxleboxesNormal or High LoadsPlummer BlocksHigh Temperature Rise ofInner Ring Through ShaftAccurate Running Desirable under Normal or Light LoadsAccurate Running and High Rigidity Desirable under Variable LoadsMinimum noise is requiredPaper DryersGrinding Spindle RearBall Bearings, High-Speed CentrifugalCompressor FreeBearingsGrinding Spindle FrontBall Bearings, High-Speed CentrifugalCompressor FixedBearingsCylindrical RollerBearings for MachineTool Main SpindleElectrical HomeAppliancesRemarks table is applicable to cast iron and steel housings.
5 For housingsmade of light alloys, the interference should be tighter than in this applicable to special F& 6/27/06 10:31 AM Page 47 Shaft Diameter (mm)ToleranceofShaftRemarksBallBearingsC ylindricalRollerBearings,TaperedRollerBe aringsSphericalRollerBearings CYLINDRICAL BORESAll Shaft DiametersAll Shaft DiametersUse g5 and h5 whereaccuracy is case of large bearings,f6 can be used to allow easy axial and m6 can be used forsingle-row tapered rollerbearings and single-rowangular contact ball bearingsinstead of k5 and than CNbearing internalclearance is necessary. g6h6<18 js518~100<40 js6 (j6)100~20040~140 k6 140~200 m6<18 js5 (j5-6)18~100<40<40k5-6100~14040~10040~65 m5-6140~200100~14065~100m6200~280140~200 100~140n6 200~400140~280p6 50~14050~100n6 140~200100~140p6 Over 200140~200r6 200~500r7js6 (j6)H9/IT5H10/IT7 280~500r6 over 500r7 TAPERED BORES AND SLEEVESAll Shaft DiametersIT5 and IT7 mean that thedeviation of the shaft from its true geometric from, and cylindricityshould be within thetolerances of IT5 and F& 6/27/06 10.
6 31 AM Page 76 Fits and Clearances Pocket GuideFits between Radial Bearings and ShaftsLoad ConditionsExamplesRADIAL BEARINGS WITHR otating Outer Ring LoadRotating Inner Ring Load or Direction of LoadIndeterminateLight Loadsor Variable Loads(< )Heavy Loadsor Shock Loads(< )Normal Loads ( to Cr)Electrical Home Appliances,Pumps, Blowers,Transport Vehicles, Precision Machinery, Machine ToolsGeneral bearing Applications,Medium and Large Motors,Turbines, Pumps,Engine Main Bearings,Gears,Woodworking MachinesRailway Axleboxes,Industrial Vehicles, traction Motors,Construction,Equipment,CrushersGe neral bearing Applications,Railway AxleboxesTransmission Shafts,Woodworking SpindlesAxial Loads OnlyAll Types of LoadingRemarksThis table is applicable only to solid steel shaftsEasy axial displacement of inner ring on shaft desirableWheels on Stationary AxlesEasy axial displacement ofinner ring on shaft unnecessaryTension PulleysRope SheavesRADIAL BEARINGS WITH70424 F& 6/27/06 10:31 AM Page 69+ 3+ 6+ 8+ 6+ 9+13+ 9+ 12+ 16+ 20+ 23+ 2736 2 2 4+ 1+ 1+ 1+ 4+ 4+ 8+ 12+ 15+ 15+ 4+ 7+10+ 7+10+ 16+12+ 15+ 19+ 24+ 28+ 34610 2 2 5+ 1+ 1+ 1+ 6+ 6+ 10+ 15+ 19+ 19+ 5+ 8+12+ 9+12+ 19+15+ 18+ 23+ 29+ 34+ 411018 3 3 6+ 1+ 1+ 1+ 7+ 7+ 12+ 18+ 23+ 23+ 5+ 9+13+11+15+ 23+17+ 21+ 28+ 35+ 41+ 491830 4 4 8+ 2+ 2+ 2+ 8+ 8+ 15+ 22+ 28+ 28+ 6+11+15+13+18+ 27+20+ 25+ 33+ 42+ 50+ 593050 5 5 10+ 2+ 2+ 2+ 9+ 9+ 17+ 26+ 34+ 34+ 60+ 715065+ 6+12+18+15+21+ 32+24+ 30+ 39+ 51+ 41+ 41 7 7 12+ 2+ 2+ 2+11+ 11+ 20+ 32+ 62+ 736580+ 43+ 43+ 73+ 8680100+ 6+13+20+18+25+ 38+28+ 35+ 45+ 59+ 51+ 51 9 9 15+ 3+ 3+ 3+13+ 13+ 23+ 37+ 76+ 89100120+ 54+ 54+ 88+103120140+ 63+ 63+ 7+14+22+21+28+ 43+33+ 40+ 52+ 68+ 90+105140160 11 11 18+ 3+ 3+ 3+15+ 15+ 27+ 43+ 65+ 65+ 93+108160180+ 68+
7 68+106+123180200+ 77+ 77+ 7+16+25+24+33+ 50+37+ 46+ 60+ 79+109+126200225 13 13 21+ 4+ 4+ 4+17+ 17+ 31+ 50+ 80+ 80+113+130225250+ 84+ 84+126+146250280+ 7 16 26+27+36+ 56+43+ 52+ 66+ 88+ 94+ 94 16+ 4+ 4+ 4+20+ 20+ 34+ 56+130+150280315+ 98+ 98+144+165315355+ 7 18+29+29+40+ 61+46+ 57+ 73+ 98+108+108 18 28+ 4+ 4+ 4+21+ 21+ 37+ 62+150+171355400+114+114+166+189400450+ 7 20+31+32+45+ 68+50+ 63+ 80+108+126+126 20 32+ 5+ 5+ 5+23+ 23+ 40+ 68+172+195450500+132+132+194+220500560 +44+ 70 + 70+ 88+122+150+15000+ 26+ 44+ 78+199+225560630+155+155+225+255630710 +50+ 80 + 80+100+138+175+17500+ 30+ 50+ 88+235+265710800+185+185+266+300800900 +56+ 90 + 90+112+156+210+21000+ 34+ 56+100+276+3109001 000+220+220+316+3551 0001 120 +66+105 +106+132+186+250+25000+ 40+ 66+120+326+3651 1201 250+260+260 +378+4251 2501 400 +78+125 +126+156+218+300+30000+ 48+ 78+140+408+4551 4001 600+330+330+462+5201 6001 800 +92+150 +150+184+262+370+37000+ 58+ 92+170+492+5501 8002 000+400+400 DiameterClassification (mm)Over F& 6/27/06 10.
8 31 AM Page 98 Fits and Clearances Pocket GuideTolerances for Shaft Diameters360 30 20 10 4 4000000 4 8 38 28 18 9 12 5 8 12 18 30 486100 40 25 13 5 5000000 3 8 49 34 22 11 14 6 9 15 22 36 5810180 50 32 16 6 6000000 4 8 61 43 27 14 17 8 11 18 27 43 7018300 65 40 20 7 7000000 10 78 53 33 16 20 9 13 21 33 52 8430500 80 50 25 9 9000000 8 12 96 66 41 20 25 11 16 25 39 62 10050800 100 60 30 10 10000000 15 119 79 49 23 29 13 19 30 46 74 120801200 120 72 36 12 12000000 11 20 142 94 58 27 34 15 22 35 54 87 1401201800 145 85 43 14 14000000 9 25 170 110 68 32 39 18 25 40 63 100 1601802500 170 100 50 15 15000000 10 30 199 129 79 35 44 20 29 46 72 115 1852503150 190 110 56 17 17000000 16 35 222 142 88 40 49 23 32 52 81 130 2103154000 210 125 62 18 18000000 18 40 246 161 98 43 54 25 36 57 89 140 2304005000 230 135 68 20 20000000 20 45 270 175 108 47 60 27 40 63 97 155 2505006300 260 145 76 22 00000 22 50 304 189 120 66 44 70 110 175 2806308000 290 160 80 24 00000 25 75 340 210 130 74 50 80 125 200 3208001 0000 320 170 86 26 00000 28 100 376 226 142 82 56 90 140 230 3601 000 1 2500 350 195 98 28 00000 33 125 416 261 164 94 66 105 165 260 4201 250 1 6000 390 220 110 30 00000 39 160 468 298 188 108 78 125 195 310 5001 600 2 0000 430 240 120 32 00000 46 200 522 332 164 124 92 150 230 370 600 Units : mDiameterClassification (mm)Over PlaneMean (Normal)dm pd6e6f6g5g6h5h6h7h8h9h10js5js670424 F& 6/27/06 10.
9 31 AM Page 811+ 2+ 2+ 6 4 40 9 9 5 15 111018 6 9 12 12 15 18 17 20 23 26 29+ 1+ 2+ 6 5 40 12 11 7 18 141830 8 11 15 14 17 21 21 24 28 31 35+ 2+ 3+ 7 5 40 13 12 8 21 173050 9 13 18 16 20 25 24 28 33 37 42+ 3+ 4+ 9 6 50 15 14 9 26 215080 10 15 21 19 24 30 28 33 39 45 51+ 2+ 4+ 10 8 60 18 16 10 30 2480120 13 18 25 23 28 35 33 38 45 52 59+ 3+ 4+ 12 9 80 21 20 12 36 28120180 15 21 28 27 33 40 39 45 52 61 68+ 2+ 5+ 13 11 80 25 22 14 41 33180250 18 24 33 31 37 46 45 51 60 70 79+ 3+ 5+ 16 13 90 27 25 14 47 36250315 20 27 36 36 41 52 50 57 66 79 88+ 3+ 7+ 17 14 100 30 26 16 51 41315400 22 29 40 39 46 57 55 62 73 87 98+ 2+ 8+ 18 16 100 33 27 17 55 45400500 25 32 45 43 50 63 60 67 80 95 108 00 26 26 44 44 78 78500630 44 70 70 96 88 114 122 148 00 30 30 50 50 88 88630800 50 80 80 110 100 130 138 168 00 34 34 56 56 100 1008001 000 56 90 90 124 112 146 156 190 00 40 40 66 66 120 1201 0001 250 66 105 106 145 132 171 186 225 00 48 48 78 78 140 1401 2501 600 78 125 126 173 156 203 218 265 00 58 58 92 92 170 1701 6002 000 92 150 150 208 184 242 262 320 00 68 68 110 110 195 1952 0002 500 110 175 178 243 220 285 305 370K7K6K5M5M6M7N5N6N7P6P7 DiameterClassification (mm)Over F& 6/27/06 10.
10 31 AM Page 1110 Fits and Clearances Pocket GuideTolerances for Housing Bore Diameters10180+ 43+ 27+ 34+ 17+ 24+ 11+ 18+ 27+ 6+10 9 8+ 32+ 16+ 16+ 6+ 6000 5 818300+ 53+ 33+ 41+ 20+ 28+ 13+ 21+ 33+ 8+12 9+ 40+ 20+ 20+ 7+ 7000 5 930500+ 66+ 41+ 50+ 25+ 34+ 16+ 25+ 39+10+14 8 11+ 50+ 25+ 25+ 9+ 9000 6 1150800+ 79+ 49+ 60+ 29+ 40+ 19+ 30+ 46+13+18 15 13+ 60+ 30+ 30+ 10+ 10000 6 12801200+ 94+ 58+ 71+ 34+ 47+ 22+ 35+ 54+16+22 11 15+ 72+ 36+ 36+ 12+ 12000 6 13012015018+110+ 68+ 83+ 39+ 54+ 25+ 40+ 63+18+26 20150180 0+ 85+ 43+ 43+ 14+ 14000 7 14 251802500+129+ 79+ 96+ 44+ 61+ 29+ 46+ 72+22+30 23 30+100+ 50+ 50+ 15+ 15000 7 162503150+142+ 88+108+ 49+ 69+ 32+ 52+ 81+25+36 16 26 35+110+ 56+ 56+ 17+ 17000 7 163154000+161+ 98+119+ 54+ 75+ 36+ 57+ 89+29+39 18 40+125+ 62+ 62+ 18+ 18000 7 184005000+175+108+131+ 60+ 83+ 40+ 63+ 97+33+43 20 45+135+ 68+ 68+ 20+ 20000 7 205006300+189+120+146+ 66+ 92+ 44+ 70+110 22 35 50+145+ 76+ 76+ 22+ 220006308000+210+130+160+ 74+104+ 50+ 80+125 25 40 75+160+ 80+ 80+ 24+ 240008001 0000+226+142+176+ 82+116+ 56+ 90+140 28 45 100+170+ 86+ 86+ 26+ 260001 000 1 2500+261+164+203+ 94+133+ 66+105+165 33 125+195+ 98+ 98+ 28+ 280001 250 1 6000+298+188+235+108+155+ 78+125+195 39 160+220+110+110+ 30+ 300001 600 2 0000+332+212+270+124+182+ 92+150+230 46 75 200+240+120+120+ 32+ 320002 000 2 5000+370+240+305+144+209+110+175+280 55 250+260+130+130+ 34+ 34000 Units : mDiameterClassification (mm)Over PlaneMean (Normal)Dm pE6F6F7G6G7H6H7H8J6J7JS6JS770424 F& 6/27/06 10.
