SLEWING RINGS - Rima (UK)

SLEWING RINGSG E N E R A L C A T A L O G U E

M O T I O N ,L I F T I N GA N DB E Y O N DS I N C E 1 9 7 2COMPANY WITHQUALITY MANAGEMENTSYSTEM CERTIFIED BY DNV=ISO 9001:2000=1

S L E W I N GR I N G SD I V I S I O N2

EXAMPLES OF APPLICATION3

4O U R M O D E L S

I N D U S T R I A L S L E W I N G R I N G S I N T R O D U C T I O NThe information within this catalogue refers to the ISO standards that apply to slew ring manufacturing.Four point contact slewing rings, due to the many different applications do not have a standard production; loadcapacities can differ from one manufacturer to another due to the geometrical construction of each slewing rings.The material used for the slewing rings construction in this catalogue is: C45N.The specific conditions in which they operate can be:• High axial load• Tilting moments• Radial load• Slow and discontinuous rotation• Horizontal work positionCONSTRUCTION MATERIALSRings composition:C45 (Normalised, Hardened and tempered)Correspondence chart between Italian, European and non- European regulationsUNI7845/787874/79EURONORM83/70NORMATIVE17200/69DINW NrAFNORA 35 551ABS970-1/72970-2/70AISI - SAEC 45 2C45 Ck45 1191 XC48 080M46 104542 CrMo4 (Normalised, Hardened and tempered)Correspondence chart between Italian, European and non- European regulationsUNI7845/787874/79EURONORM83/70NORMATIVE17200/69DINW NrAFNORA 35 551ABS970-1/72970-2/70AISI - SAE42 CrMo4 42 CrMo4 42 CrMo4 7225 42CD4708A42En 19c4140Sphere composition100Cr6 HRC 63 ± 3THREATMENTS• Raceways: Induction hardening HRC56 ± 3• Gears: Induction hardening HRC56 ± 36

PRELIMINARY CHOICE OF THE SLEWING RINGSTo make a correct evaluation of the slewing rings, please follow the procedures in the following flow chart:WORKING DATA Fa, Fr, M, Nrot, OVERALL DIMENSIONSUNGEARED GEAR TYPE EXTERNALModel ModelInternal ModelEQUIVALENT LOAD CALCULATION Fdeq, MreqSINGLE ROW SLEWING RINGS LOAD CHART CHECKYESVERIFICATIONNOASSEMBLAGEINSTRUCTIONDOUBLE ROW SLEWING RINGS LOAD CHART CHECKNEW PLANNINGBOLTFASTENINGCHART7

R E A D I N G O F T H E C H E C K C H A R THOW TO DETERMINE THE EQUIVALENT LOADS (Fa.eq, Mr.eq)• Peq = equivalent loads pointFa.eq = Fa + 5,05 . FrMr.eq = Mr.Significance:Fa = Nominal axial load (KN)Fr = Nominal radial load (KN)Fa.eq = Equivalent axial load (KN)Mr = Nominal tilting moment (KN.m)Mr.eq = equivalent tilting moment (KN.m)• Pu = point of useFa.u = Fa.eq . K.stat.Mr.u = Mr.eq . K.stat.Significance:K stat = Safety factorFa.u = Axial load of work (KN)Mr.u = Tilting moment of work (KN.m)Please note: the Pu must be under the curve of the limit load chartThe ratio OM/OPu represents the nominal safety factor that must correspond to the value and specificationsimposed by the user.The formulas for the preliminary choice of the slewing rings correspond to a hypothetical case with:• Axle of vertical rotation• Inferior speed to 1 turn / minute• Work without shock• Without considering the resultant loadof the gear• For different application please refer toour technical department.Please note: in all cases, the customerrequirements in this section must beconfirmed by our technical department.8

INDICATIVE DATA ON SLEWING RINGS ROTATIONThe slewing rings use is limited by the following chart.Dwp (m/m) 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600Nmax(Rot/min) 60 50 40 30 28 25 22 20 18 16 15 14 13 12Significance:• Dwp (m/m) = Center distance rotation.• Nmax = Revolutions number per minute.The information above applies to slewing rings that are working in a horizontal position and with intermittentrevolutions. In cases of continuous revolutions, please ask to our technical department for a verification.Please note: to obtain all the slewing rings information, please full complete our “slewingrings technical data schedule.SAFETY FACTORS (Kstast)ApplicationsCrane truckUnloading craneAuto cranePacking systemsWelding tablesWater conditionerSlewing tablesTower craneSlewing craneQuay CraneAerial platformsTraveling bridge craneBridge craneForestry machineHydraulic craneMerry-go-roundOffshore craneKstat1,101,251,45SpecialEvaluationSafety margins are built in based on statistical history for each of the applications above. For applications notlisted in this chart, please contact our technical dept. at slewingrings@rimaspa.it9

I N D U S T R I A L S L E W I N G R I N G S ( T T ) D ATADate: ……………………………CompanyAddressContactTel.FaxE-mailType of machineApplication of the TT: O Horizontal O Vertical O OtherRevolutions: O Continue O Intermittent O OtherTurning ring: O External O Internal O Rev. Speed [turn/min] ………LOADING OF THE TTAxial (kN) Radial (kN) Tilting moment (kNm)NominalMaximalTestGear O External O Internal O UngearedModul [m]Tangential force Ft(kN)N° of Teeth [z] Torque (kNm)N° of teeth of the Pinion [z]Working conditionsEnvironmental ConditionsAmbient temperatureOther to specify1 0

GEARFeatures:Cylindrical - straight type (on request cylindrical lead-angled)Module: 2 ÷ 12Pressure angle: α 20° - 14,5° - 25°Heath treatment of teeth: induction hardening.1 1

A S S E M B L I N G A N D M A I N T E N A N C EFIXING STRUCTUREFor an even distribution of the loads, we recommend a rigid steel structure with a minimum of resistance equalto = 500 N m/m 2 .The figure above, indicates the minimum thickness of the support structure where H is the height of slewingrings.SUPPORT STRUCTURE TOLERANCESFor the best results it is recommended that the support structure is as flat as possible, but the chart below showsthe tolerances that can be used.Dwp (m/m) 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500Tp m/m μ 8 9 10 11 12 13 14 15 16 17 18 19 20Dwp = Centre distance rotation of the spheresTp m/m μ = Tolerance of the structureIn all cases of tolerance adjustments, please use a special synthetic resin.AXIAL DEFLECTIONSAfter the fitting of the slewing rings it is good practise to verify the deflection under maximum load, making surethe tolerances are within the parameters of the following chart.Dwp 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500Ra m/m 0,2 0,22 0,25 0,28 0,31 0,34 0,37 0,40 0,43 0,40 0,50 0,53 0,56Ra = tolerance of structure rigidity1 2

BOLTSTo fix the slewing rings, use bolts class 8.8, 10.9, 12.9tighten with a torque wrench using the guide below.BOLT DIMENSIONS, WASHERBOLT ANTI TEMPERING WASHERL b> 5 · d< 10 · dD Re= 2 · dL O> dS r≥ 0,3 · dL L> 6 · bolt pitchL F> 1,5 · dBolt fastening chartDIAMETEROF BOLTSTENSIONINGFORCEN8.8 10.9TIGHTENINGTORQUENmTENSIONINGFORCENTIGHTENINGTORQUENmM12 38500 78 56000 117M14 53000 126 77000 184M16 72000 193 106000 249M18 91000 270 129000 387M20 117000 387 166000 558M22 146000 522 208000 747M24 168000 666 239000 954M27 221000 990 315000 1395TENSIONINGFORCEN12.9TIGHTENINGTORQUENm66000 15090000 240124000 370151000 510194000 720243000 970280000 1240370000 1850The fastening order listThe fastening order listExample for N=15 boltsN = number of holes Start from 01 3

G E A R E D S L E W I N G R I N G SThe fixing and the setup of the pinion must be as near to the red painted area as possible. This will give thecorrect position to allow the maximum effect of the coupling play.(g) Between the teeth that must not exceed g = 0, 04. ModuleLUBRICATIONThe most common grease used is lithium based (Ep) and corresponds to the standard: DIN 51825 K2K – 20and ISO L-X-BCHA2. It is also possible to use equivalent greases working within the temperatures of -20 C° and+ 120 C°.Listed below are some of the equivalent greases recommended:ESSOMOBILAGIPSHELLBeacon EP2Mobilux EP2GRMU / EP2Calithia EP2Please note: lubrication must be periodical and based on the machine usage.For low temperature application, special grease must be used.WORKING CONDITIONSIndustrial slewing rings have optimal working conditions based within -20° and + 60°.For any different requirements, please contact our technical dept: slewingrings@rimaspa.it1 4

INDUSTRIAL SLEWING RINGS: WORKING FEATURES1 5

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SYMBOLS CHARTCoaCorCaCrMrMZαKmXmFtCoefficient of static axial loadCoefficient of static radial loadCoefficient of dynamic axial loadCoefficient of dynamic radial loadRadial tilting momentModuleNumber of teethPressure angleTruncation coefficientAddendum modificationMaximum tooth loadConversion Tabella conversione tables chilogrammi/libbrekg/libbreLibbre 0 1 2 3 4 5 6 7 8 900,00000,45360,90721,36081,81442,26802,72163,17513,62874,0823104,53594,98955,44315,89676,35036,80397,25757,71118,16478,6183209,07199,52549,979010,43310,88611,34011,79312,24712,70113,1543013,60814,06114,51514,96915,42215,87616,32916,78317,23717,6904018,14418,59719,05119,50419,95820,41220,86521,31921,77222,2265022,68023,13323,58724,04024,49424,94825,40125,85526,30826,7616027,21627,66928,12328,57629,03029,48429,93730,39130,84431,2577031,75132,20532,65933,11233,56634,01934,47334,92735,38035,8338036,28736,74137,19537,64838,10238,55539,00939,46339,91640,3699040,82341,27741,73142,18442,63043,09143,54543,99844,45244,905Tabella Conversion conversione tables millimetri/pollicimm/inchesPoll. 0 1 2 3 4 5 6 7 8 9101101/160,001,5925,4026,9950,8052,3976,2077,79101,6103,1127,0128,6152,4154,0177,8179,4203,2204,8228,6230,2254,0255,6279,4281,01/33,1828,5753,9779,37104,8130,2155,6181,0206,4231,8257,2282,63/164,7630,1655,5680,96106,4131,8157,2182,6208,0233,4258,8284,21/46,3531,7557,1582,55108,0133,4158,8184,2209,6235,0260,4285,75/167,9433,3458,7481,14109,5134,9160,3185,7211,1236,5261,9287,33/89,5334,9260,3285,72111,1136,5161,9187,3212,7238,1263,5288,97/1611,1136,5160,9187,31112,7138,1163,5188,9214,3239,7265,1290,51/2 12,70 38,10 63,50 88,90 114,3 139,7 165,1 190,5 215,9 241,3 266,7 292,19/1614,2939,6965,0990,49115,9141,3166,7192,1217,5242,9268,3293,75/815,8841,2766,6792,07117,5142,9168,3193,7219,1244,5269,9295,311/1617,4642,8668,2693,66119,1144,5169,9195,3220,7246,1271,5296,93/419,0544,4569,8595,25120,7146,1171,5196,9222,3247,7273,1298,613/1620,6446,0471,4496,84122,2147,6173198,0223,8249,2274,6300,07/822,2347,6273,0298,42123,8149,2174,6200,1225,4250,8276,2301,615/16 23,81 49,21 74,61 100,0 125,4 150,8 176,2 201,6 227,0 252,4 277,8 303,11 1 1

M O T I O N , L I F T I N G A N D B E Y O N DBecause of continuous technology research datacan change without notice. Please, contact ourTechnical dept. for further information.1 1 2

ED. 2006RIMA s.p.a.Via Sigalina a Mattina, 32 - 25018 Montichiari (BS) ItalyTel. +39 030 962161 - Fax +39 030 9961397www.rimaspa.comDomestic salesTel. +39 030 962161 - Fax +39 030 9659357 - commerciale@rimaspa.itExport departmentTel. +39 030 962161 - Fax +39 030 9962091 - export@rimaspa.itFor UK and Ireland: Rima Uk LtdUnit 2, Rash’s Green Ind. Estate - Dereham - Norfolk - NR19 1JGTel. +44 1362 697772 - Fax +44 1362 696444 - e-mail: info@rima-uk.comwww.rima-uk.com