{"product_id":"chihai-chr-370s-7450g-41d-high-speed-brushed-dc-motor","title":"CHIHAI CHR-370S-7450G-41D High-Speed Brushed DC Motor, 7.4V, 370KD","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\u003cp\u003eThe \u003ca class=\"tophitek-context-link\" href=\"https:\/\/rcdrone.top\/collections\/chihai-motor\/\" style=\"font-weight:600;text-decoration:underline;text-decoration-thickness:1.5px;text-underline-offset:0.15em;\"\u003eCHIHAI MOTOR\u003c\/a\u003e CHR-370S-7450G-41D is a red 370-size high-speed \u003ca class=\"tophitek-context-link\" href=\"https:\/\/rcdrone.top\/collections\/brushed-dc-motors\/\" style=\"font-weight:600;text-decoration:underline;text-decoration-thickness:1.5px;text-underline-offset:0.15em;\"\u003ebrushed DC motor\u003c\/a\u003e with a D-shaped shaft, dual ball bearings and a 7.4 V rating. Choose the motor alone or the package with a solder-free motor-terminal lead for compact toy and experimental drive mechanisms.\u003c\/p\u003e\u003ch2\u003eFeatures\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eBall bearings at both ends and carbon-brush commutation.\u003c\/li\u003e\n\u003cli\u003eWet-pressed ferrite arc magnets and copper armature winding.\u003c\/li\u003e\n\u003cli\u003eDynamically balanced armature with reinforced high-temperature commutator connections.\u003c\/li\u003e\n\u003cli\u003eVentilated red housing and optional approximately 15cm red\/black lead.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cdiv style=\"overflow-x:auto\"\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand \/ model\u003c\/td\u003e\n\u003ctd\u003eCHIHAI MOTOR \/ CHR-370S-7450G-41D; 370KD red high-speed motor family\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor\u003c\/td\u003e\n\u003ctd\u003ePermanent-magnet brushed DC motor, carbon brushes, red ventilated metal housing; no gearbox\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupply\u003c\/td\u003e\n\u003ctd\u003eRated 7.4 V DC; specified operating range 6.0–7.4 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eBall bearings at both ends, wet-pressed ferrite arc magnets, copper armature winding, dynamically balanced armature and high-temperature adhesive at commutator connections\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody\u003c\/td\u003e\n\u003ctd\u003e24.4 mm diameter xapproximately 31 mm body; drawing 30.8 mm section and 41.7 mm overall reference\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput shaft\u003c\/td\u003e\n\u003ctd\u003e2 mm diameter D shaft; 9.5±0.3 mm projection, 1.5 mm across-flat reference, 6.5 mm flat length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting \/ drawing\u003c\/td\u003e\n\u003ctd\u003eTwo M 3 holes, 17 mm spacing; 6.45 mm front boss, 1.7 mm front section, 18.5 mm rear reference and 15degree front-view feature\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRotation \/ position\u003c\/td\u003e\n\u003ctd\u003eCCW reference viewed from shaft\/front side; mounting position unrestricted, horizontal\/vertical typical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet mass\u003c\/td\u003e\n\u003ctd\u003eApproximately 52 g motor reference\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptional lead\u003c\/td\u003e\n\u003ctd\u003eApproximately 15cm red\/black lead with retaining spring-terminal connection at motor; free ends require correct external connection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/div\u003e\u003ch2\u003eElectrical Performance at 7.4 V\u003c\/h2\u003e\u003cp\u003eSpecification limits and typical test values are listed separately. Typical values are reference results, not guaranteed values for every motor. The approximately 50000 rpm description is a rounded no-load reference; use the 49000 rpm±10% specification below.\u003c\/p\u003e\u003cdiv style=\"overflow-x:auto\"\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eTypical reference\u003c\/th\u003e\n\u003cth\u003eCondition\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eNo-load current\u003c\/td\u003e\n\u003ctd\u003e≤1.8 A\u003c\/td\u003e\n\u003ctd\u003e1.5 A\u003c\/td\u003e\n\u003ctd\u003eAt rated 7.4 V, no load\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNo-load speed\u003c\/td\u003e\n\u003ctd\u003e49000 rpm ±10%\u003c\/td\u003e\n\u003ctd\u003e49400 rpm\u003c\/td\u003e\n\u003ctd\u003eAt rated 7.4 V, no load\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNo-load starting voltage\u003c\/td\u003e\n\u003ctd\u003e≤0.8 V DC\u003c\/td\u003e\n\u003ctd\u003e0.5 V DC\u003c\/td\u003e\n\u003ctd\u003eSlowly raise input from 0 V until continuous no-load rotation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStall torque\u003c\/td\u003e\n\u003ctd\u003e≥900gf.cm\u003c\/td\u003e\n\u003ctd\u003e1138gf.cm\u003c\/td\u003e\n\u003ctd\u003eAt rated 7.4 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStall current\u003c\/td\u003e\n\u003ctd\u003e≤100 A\u003c\/td\u003e\n\u003ctd\u003e80 A\u003c\/td\u003e\n\u003ctd\u003eStable 7.4 V terminal voltage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal resistance\u003c\/td\u003e\n\u003ctd\u003e0.0925Ω ±10%\u003c\/td\u003e\n\u003ctd\u003e0.0925Ω\u003c\/td\u003e\n\u003ctd\u003eMeasured between motor terminals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInsulation resistance\u003c\/td\u003e\n\u003ctd\u003e≥10MΩ\u003c\/td\u003e\n\u003ctd\u003eInfinity reference\u003c\/td\u003e\n\u003ctd\u003eBetween terminal and metal housing at 250 V or 500VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch2\u003eLoad and Environmental Conditions\u003c\/h2\u003e\u003cdiv style=\"overflow-x:auto\"\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eTypical reference\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated load\u003c\/td\u003e\n\u003ctd\u003e125gf.cm\u003c\/td\u003e\n\u003ctd\u003e125gf.cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating-load range\u003c\/td\u003e\n\u003ctd\u003e0–570gf.cm\u003c\/td\u003e\n\u003ctd\u003e125gf.cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated-load current\u003c\/td\u003e\n\u003ctd\u003e≤12.5 A\u003c\/td\u003e\n\u003ctd\u003e10.2 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated-load speed\u003c\/td\u003e\n\u003ctd\u003e43000 rpm ±10%\u003c\/td\u003e\n\u003ctd\u003e43460 rpm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGrounding polarity\u003c\/td\u003e\n\u003ctd\u003eNo grounding polarity\u003c\/td\u003e\n\u003ctd\u003eNo grounding polarity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating environment\u003c\/td\u003e\n\u003ctd\u003e-5 to 40°C; 15–90%RH\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage environment\u003c\/td\u003e\n\u003ctd\u003e-10 to 50°C; 15–90%RH, no condensation\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003cp\u003eRated-load torque 125gf.cm and stall torque 900gf.cm use gram-force centimeters, not kilogram-force centimeters. Rated-load speed and no-load speed are different operating points. A stalled motor can draw very high current and heat rapidly; do not hold the shaft stalled. Use a suitable current-capable DC supply, controller, wiring and protection for the intended load.\u003c\/p\u003e\u003ch2\u003eInstallation and Operation\u003c\/h2\u003e\u003cp\u003eOperate within 6.0–7.4 V DC. Do not use 11.1 V for normal operation: excessive speed can damage this high-speed motor. It is intended for relatively light loads rather than heavy-load or high-reduction torque duties. The no-load starting-voltage test is not an alternative rated supply range.\u003c\/p\u003e\u003cp\u003eCheck shaft fit, mounting-hole spacing, screw engagement and the ventilated housing clearance before assembly. Keep moving parts guarded and allow the motor to cool. Follow the positive\/negative terminal references in the drawing; reversing DC polarity reverses rotation. Disconnect power before wiring or handling the shaft.\u003c\/p\u003e\u003cp\u003eThe optional spring contacts retain on the motor terminals; do not pull them out forcefully. The motor-terminal connection avoids soldering directly on the motor, while the free wire ends still need a suitable insulated supply\/controller connection. Red\/black lead polarity must match the actual terminal marks and desired rotation.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cp\u003e370-size toy upgrades, small high-speed drive experiments and compact mechanisms matched to the stated voltage, shaft, speed and load. It is a bare motor rather than a complete toy, vehicle, gearbox or drive system.\u003c\/p\u003e\u003ch2\u003eWhat's Included\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMotor Only: one red 370-size motor.\u003c\/li\u003e\n\u003cli\u003eMotor + Solder-Free Lead: one motor and the pictured approximately 15cm red\/black retaining-terminal lead.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eA battery, power supply, speed controller, gearbox, coupling, mounting bracket and complete mechanism are not included.\u003c\/p\u003e\u003ch2\u003eFAQ\u003c\/h2\u003e\u003ch3\u003eCan I run it from an 11.1 V battery?\u003c\/h3\u003e\u003cp\u003eNo. Use the specified 6.0–7.4 V operating range; 11.1 V can cause excessive speed and motor damage.\u003c\/p\u003e\u003ch3\u003eIs 43000 rpm the no-load speed?\u003c\/h3\u003e\u003cp\u003eNo. It is the rated-load speed reference. No-load specification is 49000 rpm±10% at 7.4 V.\u003c\/p\u003e\u003ch3\u003eDoes the lead package need soldering on the motor?\u003c\/h3\u003e\u003cp\u003eNo. Its retaining contacts connect at the motor terminals; the free ends still require a correct external electrical connection.\u003c\/p\u003e\u003ch2\u003eVisual Details\u003c\/h2\u003e\u003cfigure\u003e\u003ca href=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/local68-113-dimensions.webp?v=1792747922\" rel=\"noopener\" target=\"_blank\"\u003e\u003cimg alt=\"370KD mechanical dimensions in mm\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/local68-113-dimensions.webp?v=1792747922\" style=\"max-width:100%;height:auto\"\u003e\u003c\/a\u003e\u003cfigcaption\u003e370KD mechanical dimensions in mm\u003c\/figcaption\u003e\u003c\/figure\u003e\u003cfigure\u003e\u003ca href=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/local68-113-electrical.webp?v=1792747928\" rel=\"noopener\" target=\"_blank\"\u003e\u003cimg alt=\"7.4V electrical specification and typical values\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/local68-113-electrical.webp?v=1792747928\" style=\"max-width:100%;height:auto\"\u003e\u003c\/a\u003e\u003cfigcaption\u003e7.4V electrical specification and typical values\u003c\/figcaption\u003e\u003c\/figure\u003e\u003cfigure\u003e\u003ca href=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/local68-113-operating.webp?v=1792747933\" rel=\"noopener\" target=\"_blank\"\u003e\u003cimg alt=\"Load and environmental limits\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/local68-113-operating.webp?v=1792747933\" style=\"max-width:100%;height:auto\"\u003e\u003c\/a\u003e\u003cfigcaption\u003eLoad and environmental limits\u003c\/figcaption\u003e\u003c\/figure\u003e\u003cfigure\u003e\u003ca href=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/local68-113-construction.webp?v=1792747937\" rel=\"noopener\" target=\"_blank\"\u003e\u003cimg alt=\"Dual bearings,ferrite magnets and copper winding\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/local68-113-construction.webp?v=1792747937\" style=\"max-width:100%;height:auto\"\u003e\u003c\/a\u003e\u003cfigcaption\u003eDual bearings,ferrite magnets and copper winding\u003c\/figcaption\u003e\u003c\/figure\u003e\u003cfigure\u003e\u003ca href=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/local68-113-lead.webp?v=1792747942\" rel=\"noopener\" target=\"_blank\"\u003e\u003cimg alt=\"Optional solder-free motor-terminal lead\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/local68-113-lead.webp?v=1792747942\" style=\"max-width:100%;height:auto\"\u003e\u003c\/a\u003e\u003cfigcaption\u003eOptional solder-free motor-terminal lead\u003c\/figcaption\u003e\u003c\/figure\u003e","brand":"CHIHAI MOTOR","offers":[{"title":"Motor Only","offer_id":68111549530336,"sku":"CHR370S7450G41D-68113-001","price":19.92,"currency_code":"USD","in_stock":true},{"title":"Motor + Solder-Free Lead","offer_id":68111549563104,"sku":"CHR370S7450G41D-68113-002","price":21.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0643\/3210\/3904\/files\/local68-113-v1.jpg?v=1792747947","url":"https:\/\/rcdrone.top\/sv\/products\/chihai-chr-370s-7450g-41d-high-speed-brushed-dc-motor","provider":"RCDrone","version":"1.0","type":"link"}