{"product_id":"chr-gm37-520-brushed-dc-gear-motor","title":"CHIHAI MOTOR CHR-GM37-520 Brushed DC Gear Motor, 12V\/24V, All-Metal Gears","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eCHIHAI CHR-GM37-520 is a 37 mm brushed DC gear motor built on a full metal gear train, sized for robot chassis, powered furniture and small automation where a plastic gearbox would wear out. The helical first stage is there for noise: it takes the load off the first mesh so a heavy drive train does not ring.\u003c\/p\u003e\n\u003cp\u003eNine nominal reduction ratios from 1:6.3 to 1:450 are offered on both 12 V and 24 V windings, with a double-flat shaft version of the 1:10 ratio for pulleys and couplings that need a positive grip.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAll-metal gear train.\u003c\/strong\u003e Helical first stage, machined gears, brass posts: built to carry load rather than speed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrushed permanent-magnet motor.\u003c\/strong\u003e Simple two-wire drive, reversible by swapping polarity, dimmable with PWM.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eØ6 mm D-cut shaft.\u003c\/strong\u003e 21 mm long with a 12 mm flat, so pinions and couplings do not slip.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eØ37 mm body.\u003c\/strong\u003e Six M3 tapped holes on a 31 mm circle for a standard GM37 bracket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGearbox length follows ratio.\u003c\/strong\u003e 19 mm at 1:6.3 rising to 29 mm at 1:450, so check your clearance before picking the slowest ratio.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApprox. 150 g.\u003c\/strong\u003e Provide a suitable mechanical mounting for the application.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eConfiguration Guide\u003c\/h2\u003e\n\u003ch3\u003e12 V or 24 V\u003c\/h3\u003e\n\u003cp\u003eSame gearbox, different winding. At the same ratio the 24 V version is the quicker one (760 rpm against 660 rpm rated at 1:6.3) and draws less current; the 12 V version is the usual choice for battery packs and 12 V supplies. Choose the winding to match your supply rather than the speed.\u003c\/p\u003e\n\u003ch3\u003eRatio\u003c\/h3\u003e\n\u003cp\u003e1:6.3 is the fast end and 1:450 the slow, high-torque end. Use the exact rated speed and torque for the selected ratio. The gearbox gets longer: 19 mm at the fast end, 29 mm at the slow end.\u003c\/p\u003e\n\u003ch3\u003eDouble-flat shaft\u003c\/h3\u003e\n\u003cp\u003eThe 1:10 double-flat variant uses the same ratio as the standard 1:10 but a shaft with two flats, which is what you want if a set screw has to bite without a keyway.\u003c\/p\u003e\n\u003ch3\u003eStall limits at high ratios\u003c\/h3\u003e\n\u003cp\u003eThe published chart stops giving stall torque at 1:270 and above and instead warns not to exceed 35 kgf·cm or stall the motor at those ratios. Avoid stall and overload; a continuous-duty cycle is not specified.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003ctd\u003eCHR-GM37-520\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003e\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\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMotor type\u003c\/th\u003e\n\u003ctd\u003eBrushed permanent-magnet DC, all-metal helical-and-spur gear train\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMotor diameter\u003c\/th\u003e\n\u003ctd\u003eØ37 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGearbox length L\u003c\/th\u003e\n\u003ctd\u003e19 \/ 22 \/ 24 \/ 26.5 \/ 29 mm depending on ratio\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOutput shaft\u003c\/th\u003e\n\u003ctd\u003eØ6 mm D-cut, 21 mm long, D-flat 12 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSupply voltage\u003c\/th\u003e\n\u003ctd\u003eDC 3–24 V; this listing offers 12 V and 24 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGear ratios\u003c\/th\u003e\n\u003ctd\u003e1:6.3, 1:10, 1:18.8, 1:30, 1:50, 1:90, 1:150, 1:270, 1:450\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMounting holes\u003c\/th\u003e\n\u003ctd\u003e6 × ISOM3.0 tapped holes on a 31 mm circle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMounting position\u003c\/th\u003e\n\u003ctd\u003eHorizontal or vertical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd\u003eapprox. 150 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRotation\u003c\/th\u003e\n\u003ctd\u003eReversible by swapping supply polarity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch2\u003ePerformance by Winding\u003c\/h2\u003e\n\u003cp\u003eTwo charts, one per winding. Torque is published in kgf·cm with the mN·m equivalent. The 1:650 and 1:810 columns are shown because they appear in the source chart, but those two ratios are not sold in this listing.\u003c\/p\u003e\n\u003ch3\u003eDC 24V winding\u003c\/h3\u003e\u003cp\u003e\u003cem\u003eRated current ≤0.35 A · stall current 1.3 A\u003c\/em\u003e\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003e1:6.3\u003c\/th\u003e\n\u003cth\u003e1:10\u003c\/th\u003e\n\u003cth\u003e1:18.8\u003c\/th\u003e\n\u003cth\u003e1:30\u003c\/th\u003e\n\u003cth\u003e1:50\u003c\/th\u003e\n\u003cth\u003e1:90\u003c\/th\u003e\n\u003cth\u003e1:150\u003c\/th\u003e\n\u003cth\u003e1:270\u003c\/th\u003e\n\u003cth\u003e1:450\u003c\/th\u003e\n\u003cth\u003e1:650\u003c\/th\u003e\n\u003cth\u003e1:810\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eNo-load current\u003c\/th\u003e\n\u003ctd\u003e≤100 mA\u003c\/td\u003e\n\u003ctd\u003e≤100 mA\u003c\/td\u003e\n\u003ctd\u003e≤100 mA\u003c\/td\u003e\n\u003ctd\u003e≤100 mA\u003c\/td\u003e\n\u003ctd\u003e≤100 mA\u003c\/td\u003e\n\u003ctd\u003e≤100 mA\u003c\/td\u003e\n\u003ctd\u003e≤100 mA\u003c\/td\u003e\n\u003ctd\u003e≤100 mA\u003c\/td\u003e\n\u003ctd\u003e≤100 mA\u003c\/td\u003e\n\u003ctd\u003e≤100 mA\u003c\/td\u003e\n\u003ctd\u003e≤100 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNo-load speed\u003c\/th\u003e\n\u003ctd\u003e1170 rpm\u003c\/td\u003e\n\u003ctd\u003e740 rpm\u003c\/td\u003e\n\u003ctd\u003e390 rpm\u003c\/td\u003e\n\u003ctd\u003e247 rpm\u003c\/td\u003e\n\u003ctd\u003e147 rpm\u003c\/td\u003e\n\u003ctd\u003e80 rpm\u003c\/td\u003e\n\u003ctd\u003e49 rpm\u003c\/td\u003e\n\u003ctd\u003e27 rpm\u003c\/td\u003e\n\u003ctd\u003e16 rpm\u003c\/td\u003e\n\u003ctd\u003e11 rpm\u003c\/td\u003e\n\u003ctd\u003e9 rpm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRated torque\u003c\/th\u003e\n\u003ctd\u003e0.30 kgf·cm\u003c\/td\u003e\n\u003ctd\u003e0.47 kgf·cm\u003c\/td\u003e\n\u003ctd\u003e0.88 kgf·cm\u003c\/td\u003e\n\u003ctd\u003e1.4 kgf·cm\u003c\/td\u003e\n\u003ctd\u003e2.40 kgf·cm\u003c\/td\u003e\n\u003ctd\u003e4.2 kgf·cm\u003c\/td\u003e\n\u003ctd\u003e7.00 kgf·cm\u003c\/td\u003e\n\u003ctd\u003e12.00 kgf·cm\u003c\/td\u003e\n\u003ctd\u003e21.00 kgf·cm\u003c\/td\u003e\n\u003ctd\u003e30.00 kgf·cm\u003c\/td\u003e\n\u003ctd\u003e30.00 kgf·cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRated torque\u003c\/th\u003e\n\u003ctd\u003e29.41 mN·m\u003c\/td\u003e\n\u003ctd\u003e46.08 mN·m\u003c\/td\u003e\n\u003ctd\u003e86.63 mN·m\u003c\/td\u003e\n\u003ctd\u003e137.3 mN·m\u003c\/td\u003e\n\u003ctd\u003e235.3 mN·m\u003c\/td\u003e\n\u003ctd\u003e411.8 mN·m\u003c\/td\u003e\n\u003ctd\u003e686.3 mN·m\u003c\/td\u003e\n\u003ctd\u003e1176 mN·m\u003c\/td\u003e\n\u003ctd\u003e2059 mN·m\u003c\/td\u003e\n\u003ctd\u003e2941 mN·m\u003c\/td\u003e\n\u003ctd\u003e2941 mN·m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRated speed\u003c\/th\u003e\n\u003ctd\u003e760 rpm\u003c\/td\u003e\n\u003ctd\u003e480 rpm\u003c\/td\u003e\n\u003ctd\u003e255 rpm\u003c\/td\u003e\n\u003ctd\u003e160 rpm\u003c\/td\u003e\n\u003ctd\u003e95 rpm\u003c\/td\u003e\n\u003ctd\u003e53 rpm\u003c\/td\u003e\n\u003ctd\u003e31 rpm\u003c\/td\u003e\n\u003ctd\u003e18 rpm\u003c\/td\u003e\n\u003ctd\u003e10 rpm\u003c\/td\u003e\n\u003ctd\u003e9 rpm\u003c\/td\u003e\n\u003ctd\u003e7 rpm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStall torque\u003c\/th\u003e\n\u003ctd\u003e1.2 kgf·cm\u003c\/td\u003e\n\u003ctd\u003e1.9 kgf·cm\u003c\/td\u003e\n\u003ctd\u003e3.6 kgf·cm\u003c\/td\u003e\n\u003ctd\u003e5.5 kgf·cm\u003c\/td\u003e\n\u003ctd\u003e9.5 kgf·cm\u003c\/td\u003e\n\u003ctd\u003e16.0 kgf·cm\u003c\/td\u003e\n\u003ctd\u003e28.0 kgf·cm\u003c\/td\u003e\n\u003ctd colspan=\"4\" style=\"background:#fdecec;color:#b00\"\u003eDo not exceed 35 kgf·cm and do not stall at these ratios\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGearbox length L\u003c\/th\u003e\n\u003ctd\u003e19 mm\u003c\/td\u003e\n\u003ctd\u003e19 mm\u003c\/td\u003e\n\u003ctd\u003e19 mm\u003c\/td\u003e\n\u003ctd\u003e22 mm\u003c\/td\u003e\n\u003ctd\u003e24 mm\u003c\/td\u003e\n\u003ctd\u003e24 mm\u003c\/td\u003e\n\u003ctd\u003e26.5 mm\u003c\/td\u003e\n\u003ctd\u003e26.5 mm\u003c\/td\u003e\n\u003ctd\u003e29 mm\u003c\/td\u003e\n\u003ctd\u003e29 mm\u003c\/td\u003e\n\u003ctd\u003e29 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eDC 12V winding\u003c\/h3\u003e\u003cp\u003e\u003cem\u003eRated current ≤0.45 A · stall current 2.4 A\u003c\/em\u003e\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003e1:6.3\u003c\/th\u003e\n\u003cth\u003e1:10\u003c\/th\u003e\n\u003cth\u003e1:18.8\u003c\/th\u003e\n\u003cth\u003e1:30\u003c\/th\u003e\n\u003cth\u003e1:50\u003c\/th\u003e\n\u003cth\u003e1:90\u003c\/th\u003e\n\u003cth\u003e1:150\u003c\/th\u003e\n\u003cth\u003e1:270\u003c\/th\u003e\n\u003cth\u003e1:450\u003c\/th\u003e\n\u003cth\u003e1:650\u003c\/th\u003e\n\u003cth\u003e1:810\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eNo-load current\u003c\/th\u003e\n\u003ctd\u003e≤100 mA\u003c\/td\u003e\n\u003ctd\u003e≤100 mA\u003c\/td\u003e\n\u003ctd\u003e≤100 mA\u003c\/td\u003e\n\u003ctd\u003e≤100 mA\u003c\/td\u003e\n\u003ctd\u003e≤100 mA\u003c\/td\u003e\n\u003ctd\u003e≤100 mA\u003c\/td\u003e\n\u003ctd\u003e≤100 mA\u003c\/td\u003e\n\u003ctd\u003e≤100 mA\u003c\/td\u003e\n\u003ctd\u003e≤100 mA\u003c\/td\u003e\n\u003ctd\u003e≤100 mA\u003c\/td\u003e\n\u003ctd\u003e≤100 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNo-load speed\u003c\/th\u003e\n\u003ctd\u003e1170 rpm\u003c\/td\u003e\n\u003ctd\u003e740 rpm\u003c\/td\u003e\n\u003ctd\u003e390 rpm\u003c\/td\u003e\n\u003ctd\u003e247 rpm\u003c\/td\u003e\n\u003ctd\u003e147 rpm\u003c\/td\u003e\n\u003ctd\u003e80 rpm\u003c\/td\u003e\n\u003ctd\u003e49 rpm\u003c\/td\u003e\n\u003ctd\u003e27 rpm\u003c\/td\u003e\n\u003ctd\u003e16 rpm\u003c\/td\u003e\n\u003ctd\u003e11 rpm\u003c\/td\u003e\n\u003ctd\u003e9 rpm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRated torque\u003c\/th\u003e\n\u003ctd\u003e0.30 kgf·cm\u003c\/td\u003e\n\u003ctd\u003e0.47 kgf·cm\u003c\/td\u003e\n\u003ctd\u003e0.88 kgf·cm\u003c\/td\u003e\n\u003ctd\u003e1.4 kgf·cm\u003c\/td\u003e\n\u003ctd\u003e2.40 kgf·cm\u003c\/td\u003e\n\u003ctd\u003e4.2 kgf·cm\u003c\/td\u003e\n\u003ctd\u003e7.00 kgf·cm\u003c\/td\u003e\n\u003ctd\u003e12.00 kgf·cm\u003c\/td\u003e\n\u003ctd\u003e21.00 kgf·cm\u003c\/td\u003e\n\u003ctd\u003e30.00 kgf·cm\u003c\/td\u003e\n\u003ctd\u003e30.00 kgf·cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRated torque\u003c\/th\u003e\n\u003ctd\u003e29.41 mN·m\u003c\/td\u003e\n\u003ctd\u003e46.08 mN·m\u003c\/td\u003e\n\u003ctd\u003e86.63 mN·m\u003c\/td\u003e\n\u003ctd\u003e137.3 mN·m\u003c\/td\u003e\n\u003ctd\u003e235.3 mN·m\u003c\/td\u003e\n\u003ctd\u003e411.8 mN·m\u003c\/td\u003e\n\u003ctd\u003e686.3 mN·m\u003c\/td\u003e\n\u003ctd\u003e1176 mN·m\u003c\/td\u003e\n\u003ctd\u003e2059 mN·m\u003c\/td\u003e\n\u003ctd\u003e2941 mN·m\u003c\/td\u003e\n\u003ctd\u003e2941 mN·m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRated speed\u003c\/th\u003e\n\u003ctd\u003e660 rpm\u003c\/td\u003e\n\u003ctd\u003e415 rpm\u003c\/td\u003e\n\u003ctd\u003e215 rpm\u003c\/td\u003e\n\u003ctd\u003e139 rpm\u003c\/td\u003e\n\u003ctd\u003e83 rpm\u003c\/td\u003e\n\u003ctd\u003e46 rpm\u003c\/td\u003e\n\u003ctd\u003e28 rpm\u003c\/td\u003e\n\u003ctd\u003e16 rpm\u003c\/td\u003e\n\u003ctd\u003e10 rpm\u003c\/td\u003e\n\u003ctd\u003e9 rpm\u003c\/td\u003e\n\u003ctd\u003e7 rpm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStall torque\u003c\/th\u003e\n\u003ctd\u003e1.2 kgf·cm\u003c\/td\u003e\n\u003ctd\u003e1.9 kgf·cm\u003c\/td\u003e\n\u003ctd\u003e3.6 kgf·cm\u003c\/td\u003e\n\u003ctd\u003e5.5 kgf·cm\u003c\/td\u003e\n\u003ctd\u003e9.5 kgf·cm\u003c\/td\u003e\n\u003ctd\u003e16.0 kgf·cm\u003c\/td\u003e\n\u003ctd\u003e28.0 kgf·cm\u003c\/td\u003e\n\u003ctd colspan=\"4\" style=\"background:#fdecec;color:#b00\"\u003eDo not exceed 35 kgf·cm and do not stall at these ratios\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGearbox length L\u003c\/th\u003e\n\u003ctd\u003e19 mm\u003c\/td\u003e\n\u003ctd\u003e19 mm\u003c\/td\u003e\n\u003ctd\u003e19 mm\u003c\/td\u003e\n\u003ctd\u003e22 mm\u003c\/td\u003e\n\u003ctd\u003e24 mm\u003c\/td\u003e\n\u003ctd\u003e24 mm\u003c\/td\u003e\n\u003ctd\u003e26.5 mm\u003c\/td\u003e\n\u003ctd\u003e26.5 mm\u003c\/td\u003e\n\u003ctd\u003e29 mm\u003c\/td\u003e\n\u003ctd\u003e29 mm\u003c\/td\u003e\n\u003ctd\u003e29 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eMechanical Dimensions\u003c\/h2\u003e\n\u003cp\u003eBody diameter \u003cstrong\u003eØ37 mm\u003c\/strong\u003e; overall length is the gearbox length plus the motor can, and the gearbox measures \u003cstrong\u003e19 mm\u003c\/strong\u003e at 1:6.3 up to \u003cstrong\u003e29 mm\u003c\/strong\u003e at 1:450. Output shaft \u003cstrong\u003eØ6 mm, 21 mm long with a 12 mm D-flat\u003c\/strong\u003e. Six \u003cstrong\u003eM3\u003c\/strong\u003e tapped holes sit on a \u003cstrong\u003e31 mm\u003c\/strong\u003e circle, and the front plate is \u003cstrong\u003e24.5 ± 0.1 mm\u003c\/strong\u003e across the flats. Motor alone weighs about \u003cstrong\u003e150 g\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThe outline drawing in Visual Details carries every dimension needed to design a bracket or a chassis cut-out.\u003c\/p\u003e\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003ePackage\u003c\/th\u003e\n\u003cth\u003eWhat you receive\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor Only\u003c\/td\u003e\n\u003ctd\u003e1 × gear motor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor + Mounting Bracket\u003c\/td\u003e\n\u003ctd\u003e1 × gear motor, 1 × mounting bracket\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor + Spade Terminal Lead\u003c\/td\u003e\n\u003ctd\u003e1 × gear motor, 1 × spade terminal lead\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor + Spade Lead + Bracket\u003c\/td\u003e\n\u003ctd\u003e1 × gear motor, 1 × spade lead, 1 × mounting bracket\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor + Forward\/Reverse Speed Controller\u003c\/td\u003e\n\u003ctd\u003e1 × gear motor, 1 × forward\/reverse speed controller\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSmall robot chassis and balancing platforms\u003c\/li\u003e\n\u003cli\u003ePowered furniture and adjustable frames\u003c\/li\u003e\n\u003cli\u003eCamera cranes and slider drives\u003c\/li\u003e\n\u003cli\u003eDispensers, cutters and light automation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003ch3\u003eIs this gearbox self-locking?\u003c\/h3\u003e\n\u003cp\u003eNo. It is a helical-and-spur gear train, not a worm drive, so the shaft can be back-driven. If you need a load to hold when power is removed, add a brake or use a worm-gear model.\u003c\/p\u003e\n\u003ch3\u003eWhy do the charts list 1:650 and 1:810?\u003c\/h3\u003e\n\u003cp\u003eThey come from the manufacturer's standard chart, but this listing does not sell those two ratios. Only the ratios in the option list are shipped.\u003c\/p\u003e\n\u003ch3\u003eWhat happens if I stall it at a slow ratio?\u003c\/h3\u003e\n\u003cp\u003eAbove 1:150 the chart warns against stalling and caps load at 35 kgf·cm. A stalled motor draws locked-rotor current and will cook the winding, so size the load against rated torque instead.\u003c\/p\u003e\n\u003ch3\u003eCan I run it at 12 V and 24 V interchangeably?\u003c\/h3\u003e\n\u003cp\u003eNo. Each variant is wound for one voltage. Running a 12 V winding at 24 V over-speeds and overheats it.\u003c\/p\u003e\n\u003ch2\u003eVisual Details\u003c\/h2\u003e\n\u003cfigure\u003e\u003ca href=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/chr-gm37-520-description-02-dimensions-and-gearbox-length.webp?v=1792658961\" rel=\"noopener\" target=\"_blank\"\u003e\u003cimg alt=\"Outline drawing, gearbox length and specification table\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/chr-gm37-520-description-02-dimensions-and-gearbox-length.webp?v=1792658961\" style=\"max-width:100%;height:auto\"\u003e\u003c\/a\u003e\u003cfigcaption\u003eOutline dimensions and specification table\u003c\/figcaption\u003e\u003c\/figure\u003e\n\u003cfigure\u003e\u003ca href=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/chr-gm37-520-description-03-all-metal-gear-train.webp?v=1792659045\" rel=\"noopener\" target=\"_blank\"\u003e\u003cimg alt=\"All-metal gear train\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/chr-gm37-520-description-03-all-metal-gear-train.webp?v=1792659045\" style=\"max-width:100%;height:auto\"\u003e\u003c\/a\u003e\u003cfigcaption\u003eAll-metal gear train\u003c\/figcaption\u003e\u003c\/figure\u003e\n\u003cfigure\u003e\u003ca href=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/chr-gm37-520-description-04-copper-winding.webp?v=1792659051\" rel=\"noopener\" target=\"_blank\"\u003e\u003cimg alt=\"Pure copper rotor winding\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/chr-gm37-520-description-04-copper-winding.webp?v=1792659051\" style=\"max-width:100%;height:auto\"\u003e\u003c\/a\u003e\u003cfigcaption\u003ePure copper winding\u003c\/figcaption\u003e\u003c\/figure\u003e\n\u003cfigure\u003e\u003ca href=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/chr-gm37-520-description-05-d-cut-shaft.webp?v=1792659056\" rel=\"noopener\" target=\"_blank\"\u003e\u003cimg alt=\"D-cut output shaft\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/chr-gm37-520-description-05-d-cut-shaft.webp?v=1792659056\" style=\"max-width:100%;height:auto\"\u003e\u003c\/a\u003e\u003cfigcaption\u003eD-cut shaft\u003c\/figcaption\u003e\u003c\/figure\u003e","brand":"CHIHAI MOTOR","offers":[{"title":"Motor Only \/ 1:6.3 (1170 rpm) \/ 12V · 520 Motor","offer_id":68091164197088,"sku":"GM37-520-MOT-R63-12V","price":18.0,"currency_code":"USD","in_stock":true},{"title":"Motor Only \/ 1:10 (740 rpm) \/ 12V · 520 Motor","offer_id":68091164229856,"sku":"GM37-520-MOT-R10-12V","price":18.0,"currency_code":"USD","in_stock":true},{"title":"Motor Only \/ 1:18.8 (390 rpm) \/ 12V · 520 Motor","offer_id":68091164262624,"sku":"GM37-520-MOT-R188-12V","price":18.0,"currency_code":"USD","in_stock":true},{"title":"Motor Only \/ 1:30 (247 rpm) \/ 12V · 520 Motor","offer_id":68091164295392,"sku":"GM37-520-MOT-R30-12V","price":18.0,"currency_code":"USD","in_stock":true},{"title":"Motor Only \/ 1:50 (147 rpm) \/ 12V · 520 Motor","offer_id":68091164328160,"sku":"GM37-520-MOT-R50-12V","price":18.0,"currency_code":"USD","in_stock":true},{"title":"Motor Only \/ 1:90 (80 rpm) \/ 12V · 520 Motor","offer_id":68091164360928,"sku":"GM37-520-MOT-R90-12V","price":18.0,"currency_code":"USD","in_stock":true},{"title":"Motor Only \/ 1:150 (49 rpm) \/ 12V · 520 Motor","offer_id":68091164393696,"sku":"GM37-520-MOT-R150-12V","price":18.0,"currency_code":"USD","in_stock":true},{"title":"Motor Only \/ 1:270 (27 rpm) \/ 12V · 520 Motor","offer_id":68091164426464,"sku":"GM37-520-MOT-R270-12V","price":18.0,"currency_code":"USD","in_stock":true},{"title":"Motor Only \/ 1:450 (16 rpm) \/ 12V · 520 Motor","offer_id":68091164459232,"sku":"GM37-520-MOT-R450-12V","price":18.0,"currency_code":"USD","in_stock":true},{"title":"Motor Only \/ 1:10 Double-Flat Shaft \/ 12V · 520 Motor","offer_id":68091164492000,"sku":"GM37-520-MOT-R10D-12V","price":18.0,"currency_code":"USD","in_stock":true},{"title":"Motor Only \/ 1:6.3 (1170 rpm) \/ 24V · 520 Motor","offer_id":68091164524768,"sku":"GM37-520-MOT-R63-24V","price":18.0,"currency_code":"USD","in_stock":true},{"title":"Motor Only \/ 1:10 (740 rpm) \/ 24V · 520 Motor","offer_id":68091164557536,"sku":"GM37-520-MOT-R10-24V","price":18.0,"currency_code":"USD","in_stock":true},{"title":"Motor Only \/ 1:18.8 (390 rpm) \/ 24V · 520 Motor","offer_id":68091164590304,"sku":"GM37-520-MOT-R188-24V","price":18.0,"currency_code":"USD","in_stock":true},{"title":"Motor Only \/ 1:30 (247 rpm) \/ 24V · 520 Motor","offer_id":68091164623072,"sku":"GM37-520-MOT-R30-24V","price":18.0,"currency_code":"USD","in_stock":true},{"title":"Motor Only \/ 1:50 (147 rpm) \/ 24V · 520 Motor","offer_id":68091164655840,"sku":"GM37-520-MOT-R50-24V","price":18.0,"currency_code":"USD","in_stock":true},{"title":"Motor Only \/ 1:90 (80 rpm) \/ 24V · 520 Motor","offer_id":68091164688608,"sku":"GM37-520-MOT-R90-24V","price":18.0,"currency_code":"USD","in_stock":true},{"title":"Motor Only \/ 1:150 (49 rpm) \/ 24V · 520 Motor","offer_id":68091164721376,"sku":"GM37-520-MOT-R150-24V","price":18.0,"currency_code":"USD","in_stock":true},{"title":"Motor Only \/ 1:270 (27 rpm) \/ 24V · 520 Motor","offer_id":68091164754144,"sku":"GM37-520-MOT-R270-24V","price":18.0,"currency_code":"USD","in_stock":true},{"title":"Motor Only \/ 1:450 (16 rpm) \/ 24V · 520 Motor","offer_id":68091164786912,"sku":"GM37-520-MOT-R450-24V","price":18.0,"currency_code":"USD","in_stock":true},{"title":"Motor Only \/ 1:10 Double-Flat Shaft \/ 24V · 520 Motor","offer_id":68091164819680,"sku":"GM37-520-MOT-R10D-24V","price":18.0,"currency_code":"USD","in_stock":true},{"title":"Motor + Mounting Bracket \/ 1:6.3 (1170 rpm) \/ 12V · 520 Motor","offer_id":68091164852448,"sku":"GM37-520-BRK-R63-12V","price":20.91,"currency_code":"USD","in_stock":true},{"title":"Motor + Mounting Bracket \/ 1:10 (740 rpm) \/ 12V · 520 Motor","offer_id":68091164885216,"sku":"GM37-520-BRK-R10-12V","price":20.91,"currency_code":"USD","in_stock":true},{"title":"Motor + Mounting Bracket \/ 1:18.8 (390 rpm) \/ 12V · 520 Motor","offer_id":68091164917984,"sku":"GM37-520-BRK-R188-12V","price":20.91,"currency_code":"USD","in_stock":true},{"title":"Motor + Mounting Bracket \/ 1:30 (247 rpm) \/ 12V · 520 Motor","offer_id":68091164950752,"sku":"GM37-520-BRK-R30-12V","price":20.91,"currency_code":"USD","in_stock":true},{"title":"Motor + Mounting Bracket \/ 1:50 (147 rpm) \/ 12V · 520 Motor","offer_id":68091164983520,"sku":"GM37-520-BRK-R50-12V","price":20.91,"currency_code":"USD","in_stock":true},{"title":"Motor + Mounting Bracket \/ 1:90 (80 rpm) \/ 12V · 520 Motor","offer_id":68091165016288,"sku":"GM37-520-BRK-R90-12V","price":20.91,"currency_code":"USD","in_stock":true},{"title":"Motor + Mounting Bracket \/ 1:150 (49 rpm) \/ 12V · 520 Motor","offer_id":68091165049056,"sku":"GM37-520-BRK-R150-12V","price":20.91,"currency_code":"USD","in_stock":true},{"title":"Motor + Mounting Bracket \/ 1:270 (27 rpm) \/ 12V · 520 Motor","offer_id":68091165081824,"sku":"GM37-520-BRK-R270-12V","price":20.91,"currency_code":"USD","in_stock":true},{"title":"Motor + Mounting Bracket \/ 1:450 (16 rpm) \/ 12V · 520 Motor","offer_id":68091165114592,"sku":"GM37-520-BRK-R450-12V","price":20.91,"currency_code":"USD","in_stock":true},{"title":"Motor + Mounting Bracket \/ 1:10 Double-Flat Shaft \/ 12V · 520 Motor","offer_id":68091165147360,"sku":"GM37-520-BRK-R10D-12V","price":20.91,"currency_code":"USD","in_stock":true},{"title":"Motor + Mounting Bracket \/ 1:6.3 (1170 rpm) \/ 24V · 520 Motor","offer_id":68091165180128,"sku":"GM37-520-BRK-R63-24V","price":20.91,"currency_code":"USD","in_stock":true},{"title":"Motor + Mounting Bracket \/ 1:10 (740 rpm) \/ 24V · 520 Motor","offer_id":68091165212896,"sku":"GM37-520-BRK-R10-24V","price":20.91,"currency_code":"USD","in_stock":true},{"title":"Motor + Mounting Bracket \/ 1:18.8 (390 rpm) \/ 24V · 520 Motor","offer_id":68091165245664,"sku":"GM37-520-BRK-R188-24V","price":20.91,"currency_code":"USD","in_stock":true},{"title":"Motor + Mounting Bracket \/ 1:30 (247 rpm) \/ 24V · 520 Motor","offer_id":68091165278432,"sku":"GM37-520-BRK-R30-24V","price":20.91,"currency_code":"USD","in_stock":true},{"title":"Motor + Mounting Bracket \/ 1:50 (147 rpm) \/ 24V · 520 Motor","offer_id":68091165311200,"sku":"GM37-520-BRK-R50-24V","price":20.91,"currency_code":"USD","in_stock":true},{"title":"Motor + Mounting Bracket \/ 1:90 (80 rpm) \/ 24V · 520 Motor","offer_id":68091165343968,"sku":"GM37-520-BRK-R90-24V","price":20.91,"currency_code":"USD","in_stock":true},{"title":"Motor + Mounting Bracket \/ 1:150 (49 rpm) \/ 24V · 520 Motor","offer_id":68091165376736,"sku":"GM37-520-BRK-R150-24V","price":20.91,"currency_code":"USD","in_stock":true},{"title":"Motor + Mounting Bracket \/ 1:270 (27 rpm) \/ 24V · 520 Motor","offer_id":68091165409504,"sku":"GM37-520-BRK-R270-24V","price":20.91,"currency_code":"USD","in_stock":true},{"title":"Motor + Mounting Bracket \/ 1:450 (16 rpm) \/ 24V · 520 Motor","offer_id":68091165442272,"sku":"GM37-520-BRK-R450-24V","price":20.91,"currency_code":"USD","in_stock":true},{"title":"Motor + Mounting Bracket \/ 1:10 Double-Flat Shaft \/ 24V · 520 Motor","offer_id":68091165475040,"sku":"GM37-520-BRK-R10D-24V","price":20.91,"currency_code":"USD","in_stock":true},{"title":"Motor + Spade Terminal Lead \/ 1:6.3 (1170 rpm) \/ 12V · 520 Motor","offer_id":68091165507808,"sku":"GM37-520-LD-R63-12V","price":20.61,"currency_code":"USD","in_stock":true},{"title":"Motor + Spade Terminal Lead \/ 1:10 (740 rpm) \/ 12V · 520 Motor","offer_id":68091165540576,"sku":"GM37-520-LD-R10-12V","price":20.61,"currency_code":"USD","in_stock":true},{"title":"Motor + Spade Terminal Lead \/ 1:18.8 (390 rpm) \/ 12V · 520 Motor","offer_id":68091165573344,"sku":"GM37-520-LD-R188-12V","price":20.61,"currency_code":"USD","in_stock":true},{"title":"Motor + Spade Terminal Lead \/ 1:30 (247 rpm) \/ 12V · 520 Motor","offer_id":68091165606112,"sku":"GM37-520-LD-R30-12V","price":20.61,"currency_code":"USD","in_stock":true},{"title":"Motor + Spade Terminal Lead \/ 1:50 (147 rpm) \/ 12V · 520 Motor","offer_id":68091165638880,"sku":"GM37-520-LD-R50-12V","price":20.61,"currency_code":"USD","in_stock":true},{"title":"Motor + Spade Terminal Lead \/ 1:90 (80 rpm) \/ 12V · 520 Motor","offer_id":68091165671648,"sku":"GM37-520-LD-R90-12V","price":20.61,"currency_code":"USD","in_stock":true},{"title":"Motor + Spade Terminal Lead \/ 1:150 (49 rpm) \/ 12V · 520 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