Catalogue RfN 7012 - mdmetric.com

1 locking ConnectionsE1200 CatalogueRINGFEDER locking AssembliesRfN 7012 For highly-stressed shaft-hubconnections and high machi-ning tolerancesRINGFEDER Products are available from MARYLAND Box 261 Owings Mills, MD 21117 USA email: web: phones: (410)358-3130 (800)638-1830 faxes: (410)358-3142 (800)872-9329 Please note that our guarantee refers to our pro-ducts only. Because of the unlimited number of ap-plications and all different types of machines, it isnot possible for our engineers to know all factorsthat may affect or change the technical data or publication may not be reproduced, either part-ly or wholly, without the source being reserve the right to modify design by way oftechnical locking assemblies rfn 7012 Certified by DIN EN ISO 9001 and VDA ConnectionsRINGFEDER Products are available from MARYLAND Box 261 Owings Mills, MD 21117 USA email: web: phones: (410)358-3130 (800)638-1830 faxes: (410)358-3142 (800)872-93293 IndexPageCharacteristics.

2 4 Dimension table for locking assemblies rfn 7012 .. 6 Hub outside diameter ..8 Calculations: locking assemblies rfn 7012 .. 8 Hub .. 9 Hollow shaft .. 12 Fitting and removing .. 14 Hints on construction Typical constructions .. 15 The ABC of the locking assemblies rfn 7012 .. 24 Torque wrenches and accessories .. 27 Strength values: Steel .. 28 Cast steel .. 28 ISO-Table of tolerances ..29 Mounting suggestions, required data .. 31 RINGFEDER locking assemblies RfN 70124 Several locking assemblies rfn 7012 can be used in transmissible torques and axial loads are added (see page 7)We guarantee the torque/axial load transmission values as givenin this publication, regardless of whether the connection is sub-jected to static, dynamic or impact loads. However, the valuesgiven in this Catalogue must not be assemblies rfn 7012 can bridge large clearancesbetween k 11 and h 11 resp.

3 N 11 and H 11 are possible ( 7). locking assemblies rfn 7012 bridge large clearances and needno stops or other mechanical devices of this type. In contrastto all other shafthub connections, close machining tolerancesare temperature difference between shaft and hub for shrinkagefits is eliminated. locking assemblies rfn 7012 are tightenedusing standard screws and standard tools. Machining or fittingwork is not the locking screws, and the locking Assembly RfN7012 can be removed. The steep angle of the double tapers(approx. 28 ) prevents selflocking and ensures that theLocking Assembly can be released without highly-stressed shaft-hub connectionsThe shrink fit is unsurpassable. No other shaft-hub connectionscan offer anywhere near the same performance regardingfatigue strength under alternating torsional stresses.

4 These fitsare nevertheless rare, as they call for involved calculations,extremely close machining tolerances, cause considerabletrouble when fitting and removing the parts in question, andgive rise to problems during repair work (exchangeability,adjustments, centering, etc.).The locking Assembly RINGFEDER Connections is a shrink fit- a shrink fit of special 1 locking Assembly RINGFEDER rfn 7012 TRANSMISSION OF HIGH PERIPHERAL FORCESOPTIMUM DEPENDABILITYSIMPLIFIED MANUFACTURESEASY EXCHANGEABILITYEASY MOUNTINGEASY REMOVALRINGFEDER locking assemblies RfN 70125 When the locking screws are tightened down, the contact(functional) surfaces are pressed firmly together, so preventingthe ingress of dirt and assemblies rfn 7012 are most suitable for securing alltypes of bosses and hubs on shafts and axles.

5 They efficientlyreplace shrink fits, key and polygon connections, splined shafts,etc. These locking assemblies are used for the connection ofgearwheels, chain sprockets, levers, cams, cam plates, beltpulleys, brake drums, flywheels, couplings and clutches, shaft-mounted gearings, flanges, rope sheaves, track wheels,impellers, ship and aircraft propellers, etc. and are giving everysatisfaction in these and countless other assemblies rfn 7012 need no stops. Bosses and hubscan therefore be located and locked at any point of the a frictional lock connention, locking assemblies RfN7012 have absolutely no no moving parts, locking assemblies rfn 7012 can betightened and released as often as required. The locking screwsare standard items and thus readily shaft nor hub have keyways. Thus, notch effect isminimized and a high polar section modulus is at the disposalof the the permissible load is exceeded, locking AssembliesRfN 7012 will slip.

6 In this way, they can safeguard valuablemachine components against damage. However, the LockingAssembly connection is subject to the same laws as all otherfrictional lock connections, and is not suitable for use asslipping Catalogue lists all interesting data in the form of quick-reference SUSCEPTIBILITY TO CONTAMINATIONUNLIMITED APPLICATION RANGEEASY ADJUSTABILITYPERFECT TRUE RUNNINGFREEDOM FROM WEARHIGH FATIGUE STRENGTH UNDER ALTERNA-TING TORSIONAL STRESSESOVERLOAD PROTECTION EFFECTEASY CALCULATIONSRINGFEDER locking assemblies RfN 70126 locking Assembly designation for shaft diameter = 70 mm: locking Assembly RINGFEDER 70 x 110 RfN 70126 996 12419 x47201727,525527220908M 6 x 1814M80,24990 93020 x47201727,527027210908M 6 x 1814M80,24990 95722 x47201727,530027195908M 6 x 1814M80,23990 98524 x50201727,536030195959M 6 x 1814M80,26990 93725 x50201727,538030190959M 6 x 1814M80,25990 98128 x55201727,547033185959M 6 x 1814M80,3990 98130 x55201727,550033175959M 6 x 1814M80,297 990 33232 x60201727,56304019210512M 6 x 1814M80,34991 00735 x60201727,57004018010512M 6 x 1814M80,325 996 23638 x65201727,58704618811015M 6 x 1814M80,36991 01540 x65201727,59204618011015M 6 x 1814M80,347 990 35942 x75242033,515007222612512M 8 x 2235M 100,6991 02345 x75242033,516107221012512M 8 x 2235M 100,577 990 36748 x80242033.

7 517007119611512M 8 x 2235M 100,62991 03150 x80242033,517707119011512M 8 x 2235M 100,6991 04055 x85242033,522708320013014M 8 x 2235M 100,63991 05860 x90242033,524708318012014M 8 x 2235M 100,69991 06665 x95242033,530409319013016M 8 x 2235M 100,73991 07470 x 110282439,5460013221013014M 10 x 2570M 121,26991 08275 x 115282439,5490013119512514M 10 x 2570M 121,33991 09080 x 120282439,5520013118012014M 10 x 2570M 121,4991 10485 x 125282439,5630014819513016M 10 x 2570M 121,49991 11290 x130282439,5660014718012516M 10 x 2570M 121,53991 12095 x 135282439,5790016719513518M 10 x 2570M 121,62991 139100 x 145332647960019219513514M 12 x 30125M 142,01991 147110 x 1553326471050019118012514M 12 x 30125M 142,15991 155120 x 1653326471310021818513516M 12 x 30125M 142,35991 163130 x 1803834521760027216511520M 12 x 35125M 143,51991 171140 x 1903834522090029816512522M 12 x 35125M 143,85991 180150 x 2003834522420032417012524M 12 x 35125M 144,07991 198160 x 2103834522800035017013026M 12 x 35125M 144,3991 201170 x 2254438603280038616012022M 14 x 40190M 165,78991 210180 x 2354438603780042016512524M 14 x 40190M 166,05991 228190 x 2505246684650049015011528M 14 x 45190M 168,25991 236200 x 2605246685250052515011530M 14 x 45190M 168,65991 244220 x 2855650746800062015011526M 16 x 50295M 2011,22991 252240 x 3055650748550071516012530M 16 x 50295M 2012,2991 260260 x 32556507410400080016513034M 16 x 50295M 2013.

8 2991 279280 x 355666086,512800091514511532M 18 x 60405M 2219,2991 287300 x 375666086,5153000102015012036M 18 x 60405M 2220,5991 295320 x 4057872100,5210000131015012036M 20 x 70580M 2429,6991 309340 x4257872 100,5224000131014511536M 20 x 70580M 2431,1991 317360 x 4559084116294000163014511536M 22 x 80780M 2742,2991 325380 x 4759084116308000162013511036M 22 x 80780M 2744991 333400 x 4959084116322000161013010536M 22 x 80780M 2746991 341420 x 5159084116374000178013511040M 22 x 80780M 2750991 350440 x 54510296130455000206013010540M 24 x 901000M 3064,6991 368460 x 56510296130470000204012510040M 24 x 901000M 3067,4991 376480 x 58510296130515000216012510042M 24 x 901000M 3071991 384500 x 60510296130560000224012510044M 24 x 901000M 3072.

9 6991 392520 x 63010296130600000232012510045M 24 x 901000M 3080991 406540 x 65010296130630000234012010045M 24 x 901000M 3082991 414560 x 67010296130680000244012010048M 24 x 901000M 3085991 422580 x 69010296130735000254012010050M 24 x 901000M 3088991 430600 x 71010296130775000258012010050M 24 x 901000M 3091991 449620 x 73010296130825000266012010052M 24 x 901000M 3093991 457640 x 75010296130865000270011510054M 24 x 901000M 3096991 465660 x 77010296130925000280012010056M 24 x 901000M 3099991 473680 x 79010296130965000284011510056M 24 x 901000M 30 102991 481700 x 810102961301030000296011510060M 24 x 901000M 30 104991 490720 x 830102961301070000298011510060M 24 x 901000M 30 107740 x 850102961301140000308011510062M 24 x 901000M 30 110991 511760 x 870102961301210000318011510064M 24 x 901000M 30 113991 520780 x 890102961301250000322011510065M 24 x 901000M 30 116800 x 910102961301300000326011510066M 24 x 901000M 30 118820 x 930102961301370000334011510068M 24 x 901000M 30 121840 x 950102961301450000346011510070M 24 x 901000M 30 124860 x 970102961301520000354011510072M 24 x 901000M 30 127880 x 990102961301590000362011510074M 24 x 901000M 30 129900 x 1010102961301650000368011510075M 24 x 901000M 30 132920 x 1030102961301710000372011010076M 24 x 901000M 30 135940 x 1050102961301790000382011010078M 24 x 901000M 30 138960 x 1070102961301870000390011510080M 24 x 901000M 30 140980 x 1090102961301940000396011010081M

10 24 x 901000M 30 1431000 x 1110102961302000000400011010082M 24 x 901000M 30 146 x DLIL1T or Faxpp TransmissibleLocking Assembly dimensionstorquesaxialforcesshafthubLock ing screwsDIN EN ISO 4762(DIN 912) pressuresbetween LockingAssembly andBold printed types are standard7 Explanations to the opposite tabled x D, L, l, L1= Basic dimensions, locking Assembly nottightenedT= Transmissible torqueFax= Transmissible axial forcep= Approx. Surface pressure between locking Assemblyand shaftp = Approx. Surface pressure between locking Assemblyand hubTA= Required tightening torque per locking screw (tightenwith torque wrench)dD= Auxiliary thread in the front thrust ring. The screws atthese points are special marked for easy 3 Hub mounted with locking Assembly RfN 7012DN= Diameter of the hub above the locking Assembly, see pa-ges 8, 9 and 10 (radial load).