Section 6: Shaft Fixings - fptgroup.com

1 Section 6: Shaft FixingsSection : 6 The extended range of Fenner Shaft fixing devices offer the ideal means for every application. As well as the industrial standard Taper Lock bush, and asssociated hubs/adaptors, the Fenner keyless fixing device range includes FenLock Fixings in most formats and the rapid fit Trantorque GTRS haft fixingSShaft Fixings : Design Data RequiredShaft dimensions> diameter and tolerance> lengthKeyway details if presentTorque to be transmittedProduct hub details> diameter> length> material (strength)Special considerations > already taper bored> beding moments on the shaftVisit for the taper Lock installation video Fenner Taper Lock Bushes are machined to exacting tolerances in cast iron and steel, available in a full range of both metric and imperial sizes as well as a full range of weld-on hubs, bolt-on hubs and hub adaptors. Trantorque GTR keyless bushings offer a mechanical shrink-fit eliminating the problems of fretting corrosion, backlash and key wallowing.

2 FenLock cone-clamping elements provide a wide range of keyless Shaft /hub fixing assemblies offering simple installation, increased Shaft strength and high torque transmission capacity. Shaft Fixings PageTaper Lock Hubs and Adaptors 127 Taper Lock Metric Bushes 129 Taper Lock Imperial Bushes 130 Taper Lock Engineering Data 131 Taper Lock Installation 132 Trantorque GTR 133 Fenlock Cone Clamping Elements 135 Fenlock Cone Clamping Dimensions 137126 Taper Lock Hubs and AdaptorsShaft fixingSSection : 6fenner advanced chain technologythe MaRk of engineeRing exceLLenceTaper Lock BushesEasy on, easy off - The simplest and quickest Shaft fixingTried and tested in over 50 million applications> ease of installation and removal> equivalent to a shrink-on fit on uniform load applications and thus eliminating the cost of a key> no costly reboring: full rage on both metric and imperial available> high grade, close grain (gg25) material> Special 4-hole feature for balanced.

3 DRiVe DeSign & Maintenance ManuaL127 *Bore tolerance of D3 + + recommendedAll dimensions in codeSizeuse BushSizeD1D2D3D4D5017C0010Bf121210120100 807480017G0010Bf161610130110908490017K00 10Bf20201214512510099100017M0010Bf252517 185155130120119017P0010Bf303020220190165 146147 *Bore tolerance of D3 +0 is recommendedBoLt-on-huBS Fenner Taper Lock Bolt-on Hubs are designed for use with the universally accepted Taper Lock provide a convenient means of securing fan rotors, impellers, agitators and other devices which must be fastened firmly to holes equally spacedto suit B dia. boltsaDaPtoRSAdaptors for Fenner Taper Lock bushes are available for use in parallel bored components, either keyed (KM) or plain (PM) thereby eliminating the need to drill, tap and dia. Dcast ironBS1452gg - 20 - 25 SteelBS970Pt1070M20030A02001008PM2245-71 6256030A02101008kM5 x 575 6760030C02001210PM2560 97 8576030C02101210kM6 x 6103 9385030G02001610PM2570 106 95 86030G02101610kM10 x 8113 10292030M02002517PM45105 145 133121030M02102517kM16 x 10151 140127030Q02003030PM76130 181 165156030Q02103030kM20 x 12191 175159030R02003535PM89160 225 203191030R02103535kM22 x 12235 213200030S02004040PM102185 275 248229030S02104040kM 24 x 12285 257238D3D2L1DD2D1L1L3L2D3D4D2D5D1L4L1L3L 26 holes equally spacedto suit B dia.

4 BoltsHub ref. PM has Plain OD KM has Keywayed ODSection : 6 Shaft fixingSTaper Lock Hubs and AdaptorsProduct codeSizeuse Lock Hubs and AdaptorsShaft fixingSSection : 6 WeLD-on-huBSFenner Taper Lock Weld-on Hubs are made of steel, grade 070M20, drilled, tapped and taper bored to receive standard Taper Lock bushes. The shouldered outer diameter provides a convenient means of welding hubs into fan rotors, steel pulleys, plate sprockets, impellers, agitators and many other devices which must be firmly fastened to the Shaft . *Bore tolerance of D2 +0 is recommendedProduct codeSizeuse Bush SizeD1D2* holes equally spacedto suit B dia. boltsWeLDing inStRuctionSFenner Taper Lock Weld-on Hubs are made of steel, are machined to accept Taper Lock bushes for Shaft fixing, and have a precision machined shoulder against which flanges or webs can be is recommended that a continuous 45 mitre weld be used, working on the larger hub diameter Section only.

5 To ensure accuracy in the welded assembly it is essential to apply only sufficient weld to achieve sufficient weld should not be necessary for normal use and, due to greater heat input, gives a higher risk of table below shows recommended continuous fillet weld requirements for each hub noLeg LengthmmWH124WH164WH205WH255WH306WH356WH 408WH458WH5010 LegLengthFor electric arc welding, low hydrogen electrodes are recommendedfen01/14 : DRiVe DeSign & Maintenance ManuaL129 Bore DiakeywayShallow keyway DepthProduct * * 029Y0125029Z0125029U0125 MetRic BoReS anD keYWaYSBore DiakeywayShallow keyway DepthProduct 029A0010 * * * 029G0042*029H0042* 029P0075029Q0075 Section : 6 Shaft fixingSTaper Lock Metric BushesMetRic BoReS anD keYWaYSDimensions in are British Standard Metric BS 4235: Part 1: 1972 DIN 6885 and conform to ISO recommendations with the exception of those marked* which are shallower.

6 Where a key is to be used it should be parallel and side fitting, with top clearance. Depth of keyway is measured at the italic type indicates bushes made of steel or ductile Lock Imperial BushesShaft fixingSSection : 6 Bore DiakeywayShallow keyway DepthProduct * * * *019Z0500019U0500inch BoReS anD keYWaYSBore keyway DepthProduct * * * 019P0300019Q0300 Dimensions in Keyways are parallel and to British Standard 46: Part 1: 1958, with the exception of those marked* which are shallower. Where a key is to be used it should be side fitting, with top clearance. Depth of keyway is measured at the italic type indicates bushes made of steel or ductile BoReS anD keYWaYSfen01/14 : DRiVe DeSign & Maintenance ManuaL131aVeRage SLiP toRqueS foR taPeR Lock fixing (Without keY)The following table shows empirically derived average slip torque values in Nm for each basic Taper Lock bush size with a variety of common metric bore diameters.

7 The values assume that the assembly uses a fenner taper Lock bush fitted, in accordance with the instructions supplied with every bush, to a hub prepared to the Fenner specification. Slip will tend to occur at the bush/ Shaft interface, at the prescribed torque, unless a key is fitted. With a key, the slip tendency transfers to the bush/hub interface at a greater torque value related to the ratio of bush outer dia. to bore Consult your local Authorised Distributor for specific values. taper Lock bushes should only be used without a key fitted on smooth, uniformly loaded drives with service factors of or to calculate the slip torque if a key is used: Large end diameter* x average slip torque value nm (below) Bush boreBushBore (mm)averageSlip torque (nm)100812291951246611081228194924642879 1210168219105241423221016101998161524135 3824042265201224165383204234048400504202 517242203838042430485105560060670 BushBore (mm)averageSlip torque (nm)302038520303048730558906097075130035 25*4210003535601580752150902600100*30754 030*48170040406023007531501004400115*515 04535*552500454575390010055001106300125* 66255040753950505010056501257370 MiniMuM DiaMeteRS of taPeR BoReD huBSThe following table shows the recommended minimum diameter in mm for bespoke component hubs that are to be drilled, tapped and taper bored for use with Taper Lock bushes.

8 The table differentiates between grey iron and ductile materials of various minimum tensile strength grades (in N/mm2 or MN/m2 units, which are numerically equal). All standard Fenner Taper Lock products are tested to ensure that they are capable of safely containing the radial and circumferential hub stresses generated by the wedging mechanism which makes Taper Lock the equivalent of a shrink-on fit. For Taper Lock hub machining details, consult your local Authorised Lock BushMinimum hub Diameters (mm) for Various Materialstensile Strength n/mm2cast iron 180cast iron 250 Steel/Ductile iron420 Steel 6001008625451471108645754501210104867869 1610109928578161590817773201212110699922 5171301191131083020160146140132303014413 6132127352521119117816735351911761681604 0302242071971864040209195188180453522321 2205198454521520520019450402402292232165 050233223219213 Section : 6 Shaft fixingSTaper Lock Engineering DataLarge bores marked* are only available in bush sizes marked*Taper Lock bushes work effectively on Shaft diameters with h9 tolerance.

9 If in doubt please consult your local Authorised (Nominally + )* from the table on Page 132132 Taper Lock Installation InstructionsShaft fixingSSection : 6to ReMoVe1. Slacken all screws by several turns, remove one or two according to number of removal holes shown thus in diagram. Insert screwsinto removal holes after oiling thread and under head of cap inStaLL1. After ensuring that the mating tapered surfaces, bore and Shaft are completely clean and free from oil or dirt, insert bush in hub so that holes line Sparingly oil thread and point of grub screws, or thread and under head of cap screws. Place screws loosely in holes threaded in hub, shown thus in If a key is to be fitted place it in the Shaft keyway before fitting the bush. It is essential that it is a parallel key and side fitting only and has TOP Clean Shaft and fit hub to Shaft as one unit and locate in position desired, remembering that bush will nip the Shaft first and then hub will be slightly drawn on to the Using a hexagon wrench tighten screws gradually and alternately to torque shown in table Hammer against large-end of bush, using a block or sleeve to prevent damage.

10 (This will ensure that the bush is seated squarely in the bore.) Screws will now turn a little more. Repeat this alternate hammering and screw tightening once or twice to achieve maximum grip on the After drive has been running under load for a short time stop and check tightness of Fill empty holes with grease to exclude Tighten screws alternately until bush is loosened in hub and assembly is free on the Remove assembly from size100811081210161016152012251730203030 35253535403040404535454550405050 Screw tightening torque (nm) qty22222222233333333 Screw DetailsSize (BSW)1/4"1/4"3/8"3/8"3/8"7/16"1/2"5/8"5/ 8"1/2"1/2"5/8"5/8"3/4"3/4"7/8"7/8"hex. Scket Size (mm)3355566881010121214141414 Large end dia. (mm) length (mm) mass (kg) hoLeS inSeRt BuShinSeRt ScReWS anD Locate on Shafttighten ScReWS fingeR tighttighten ScReWS aLteRnateLYReMoVaLtighten ScReWS to the coRRect toRque SettingVisit to view the taper Lock installation : DRiVe DeSign & Maintenance ManuaL133 Trantorque GTR is a single nut locking bush with interlocking components for positive fixing and release.