The models we list below are part of our existing designs. We offer specific motor design for every customer. Model No. Main PerformanceRated VoltageNo LoadAt Maximum EfficiencyAt StallSpeedCurrentSpeedCurrentTorqueOutputEff.CurrentTorqueVr/minAr/minAg.cmW%AmNmRS-540SA-8019B4.8VDC169722.75138109.60617.4828.561.7462.75154.25 Unit Conversion: 1g.cm≈0.098mN.m≈0.014oz.in 1mm=0.039in 1g=0.035oz Cruise control motorDimension:φ35.8 x 50 L. shaft O.D. 3.175 mmBasic Structure: SECD housing / Plastic end capApplication:Vacuum cleaner / Air pump / Power tool / Electrical Model Weight: Approx. 170g Basic Structure of Chengfang Motors 2-pole statorSr ferrite permanent magnet3, 5, 7, 8, 9, 12,16 slots armatureSilicon-steel lamination with epoxy coatingHigh-carbon steel shaftCu-Ag alloy commutatorCopper-graphite brushesBe-Cu leaf-brush commutating systemSECD round / flat type housingSECD end cap / glassfiber reinforced PA6/6 end capCylinder / self-aligning Cu-Fe alloy sintered bushes155oC (class F) magnet wire↓ ↓ ↓ ↓ ↓ Customerized Options Leadwires with connector / pinsEMI suppression componentsPTC or thermostate protectionBuilt-in AC/DC rectifierBuilt-in cooling fanMultiple output shaftdiamond knurls, straight knurls, D-cut, stepped shaftShaft-mounted gears, essentric gears, belt pulleysStainless steel (SS304, SS420) shaftBall bearingCage-brush commutating systemPrecious metal brush / commutatorHall encoderLow-cogging torque design180oC (class H), 200oC (class C) magnet wire-40oC 220oC bearing lubricantNeodymium magnets