GERWAH Backlash-free Servo-insert Couplings

Backlash-free Servo-insert Coupling Technical DescriptionThe couplings can be finetuned to the specificapplication requirements interms of torsional stiffnessand vibration behavior byselecting from various colorcoded elastomeric spidershaving different gradesof shore hardness.Spider Colourdurometer code(shorehardness)80 SH A blue92 SH AyellowMaterial Allowable temperaturerange°Ccontinuous max. temp.temperature short termpolyurethane -50 till +80 -60 till +120polyurethane-40 till +90-50 till +120Availablefor type5-195-48Typical applicationsDrives in electronic measuring systems; backlash free when pre-compressedCentral spindle drives; backlash free when pre-compressed98 SH A red polyurethane -30 till +90 -40 till +120 5-48 Positioning drives; backlash free when pre-compressed64 SH D-H greenhytrel -50 till +120 -60 till +150 7-38 Machine tool spindles, control drives, feed units, planetary gearboxes;64 SH D polyurethane -20 till +110 -30 till +120 42-48}greenHeavy loads, torsionally stiff, high ambient temperature, water proofTechnical termsfor the couplingdesignPre-Compression: The curvedjaw couplings are designed tohave an interference fit betweenthe coupling hubs and elastomerelement for true backlashfree operation. Therefore, theflexible spider needs to be precompressedfor proper seatingduring the assembly procedure.The amount of pre-compressionvaries widely depending on theshore harness of the spider, thesize of the coupling and the machiningtolerances. A light forceis necessary to pre-compressthe torsionally soft spiders whilea large force is required to precompressa torsionally stiff spider.TkN – Nominal Torque of coupling(Nm): Continuous torquewhich can be transmittedthroughout the entire speedrange, taking into considerationoperational factors such as ambienttemperature and torsionalstiffness.Tkmax – Maximum Torque ofcoupling (Nm): Torque to betransmitted 1 x 10^5 times asa peak load or 0.5 x 10^4 timesas an alternating load during theentire life of the coupling takinginto consideration factors suchas temperature, torsional stiffnessand shock loading.Type Servoinsert5791419242838424880929880929864809298648092986480929864929864929864929864929864929864ShorescaleMax. speed (min -1 ) for typeDK/GSADSADS/R EK/GS ASS/A ASS/A-P DMK/ADSDXK/ADSAAAAAADAAADAAADAAADAADAADAADAADAAD38000 4750027000 3400019000 2400013000 16000 2540010000 12000 190007000600050004000360085001380011700955080507200318002380017300147001190010000910011450895070006000500040000,30,50,90,71,22,02,41,835647,512,5165101721356075951602001903254052654505603105256551) Dynamic torsional stiffness at 0.5 x TkNDynamic balancing is required for speeds exceeding V=30m/sTorque (Nm)TkNTkmax0,61,01,71,42,44,04,83,66101281525321020344270120150190320400380650810530900112062010501310Statictorsionalstiffness3,25,28,38,614,323341731517460115172234340570860124014302060298022903440435045807160105406300192002758078502237036200Dynamictorsionalstiffness1016252643691035295155224180344513702103017202580372042966189893468761031413050137522148631620243055707170258059308274Axialstiffness(Nm/rad) (Nm/rad) 1) (Nm/mm)82154296114219421630125262518769153336654856582112020102930148025603696178032004348235044006474243055707270258059308274®DIST. AUTORIZADOMEX (55) 53 63 23 31QRO (442) 1 95 72 60MTY (81) 83 54 10 18ventas@industrialmagza.com14info@gerwah.com • www.gerwah.com • Phone 0049-6022-22040 You Can Rely On Us! Fax 0049-6022-220411 • D-63868 Grosswallstadt