{"product_id":"siemens-1fk7084-2ac71-1qb0-1fk7-ct-servo-motor","title":"Siemens 1FK7084-2AC71-1QB0 SIMOTICS S 1FK7-CT 3.1 kW 20 Nm 2000 rpm Holding Brake Servo Motor","description":"\u003cp\u003eThe Siemens 1FK7084-2AC71-1QB0 is a SIMOTICS S 1FK7-CT synchronous servo motor rated 3.1 kW, delivering 20 Nm standstill torque (M0, 100K duty) at a 2000 rpm rated speed with an 8-pole, 6.7 A design. It is naturally cooled, IMB 5 flange-mounted, and fitted with an absolute single-turn 20-bit encoder on a DRIVE-CLiQ interface plus an integrated holding brake, for IP64-rated position retention on vertical axes.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOrder Number (MLFB)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1FK7084-2AC71-1QB0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSiemens\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSeries\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSIMOTICS S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Designation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1FK7-CT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRated Power (PN)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3.1 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRated Torque (M0, 100K)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e20 Nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRated Speed (NN)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2000 rpm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDC Link Voltage (UDC)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e600 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNumber of Poles\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRated Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6.7 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMoment of Inertia\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e35.500 kgcm2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEfficiency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e93.0 percent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTorque Constant\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2.36 Nm\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVoltage Constant at 20C\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e152.0 V per 1000 rpm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWinding Resistance at 20C\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.58 ohm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRotating Field Inductance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e12.0 mH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eElectrical Time Constant\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e20.50 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMechanical Time Constant\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.02 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThermal Time Constant\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e55 min\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShaft Torsional Stiffness\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e68,000 Nm\/rad\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNet Weight of the Motor\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e21.3 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShipping Weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e18.6 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShaft Height\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e80\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNatural cooling\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRadial Runout Tolerance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.050 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConcentricity Tolerance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.10 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAxial Runout Tolerance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.10 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDegree of Protection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIP64\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHousing Color\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAnthracite RAL 7016, standard\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEncoder\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAbsolute single-turn 20-bit, DRIVE-CLiQ interface, type AS20DQI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOptimum Speed\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2,000 rpm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMounting\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIMB 5 (IM V1, IM V3), flange, 1 rotatable power connector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShaft\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFeather key, tolerance N\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHolding Brake\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIntegrated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGermany\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHS Code\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e85015220\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eSelection Notes\u003c\/h2\u003e\u003cp\u003eThe -2AC71 code sets this motor to a 2000 rpm rated speed within the 1FK7-CT frame, versus the higher-speed -2AF71 winding rated to 3000 rpm at the same 20 Nm standstill torque; the 2000 rpm winding trades top speed for a higher 2.36 Nm\/A torque constant, useful where current headroom on the drive is limited. The -1QB0 suffix adds the integrated holding brake, which raises moment of inertia to 35.5 kgcm2 and motor weight to 21.3 kg compared with the non-brake configuration in this frame, so this figure needs to go into the drive's inertia-matching calculation. Pick this brake configuration for vertical or gravity-loaded axes that must hold position when the servo drive de-energizes; on a horizontal axis without a fail-safe holding requirement, the non-brake version in the same frame carries less inertia. The 68,000 Nm\/rad torsional stiffness and 1.02 ms mechanical time constant still support fast point-to-point moves once the brake's added inertia is accounted for in the position loop tuning.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":53960356004123,"sku":"1FK7084-2AC71-1QB0","price":2523.07,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0903\/7722\/4475\/files\/siemens-1fk7084-2ac71-1qb0-1fk7-ct-servo-motor.png?v=1789757914","url":"https:\/\/stoklink.com\/products\/siemens-1fk7084-2ac71-1qb0-1fk7-ct-servo-motor","provider":"Stoklink","version":"1.0","type":"link"}