{"product_id":"chihai-chs-gm25-25by-high-reduction-stepper-motor-100-478","title":"CHIHAI CHS-GM25-25BY High-Reduction Stepper Gear Motor, 100:1–478:1","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\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\/strong\u003e\u003cstrong\u003e CHS-GM25-25BY\u003c\/strong\u003e is a compact \u003ca href=\"https:\/\/rcdrone.top\/collections\/electric-motors\"\u003egeared stepper motor\u003c\/a\u003e with a25mm gearbox and a two-phase, four-wire bipolar motor. This high-reduction range covers nominal100:1,125:1,165:1,217:1 and478:1 ratios for low-speed positioning mechanisms. Its4mm D-shaped output shaft helps secure a mating hub.\u003c\/p\u003e\u003ch2\u003eChoose Your Package\u003c\/h2\u003e\u003cp\u003eSelect Motor Only, Motor + Bracket, Motor + Driver Board, Motor + Enclosed Driver, or Motor + Bracket + Driver Board. Each package contains one selected-ratio motor and only the named accessories. The enclosed-driver package includes its case; a bare Driver Board package does not. Power supply, application machinery and additional installation hardware are not included unless pictured as part of the selected mounting package.\u003c\/p\u003e\u003ch2\u003eMechanical Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eReference\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGearbox \/ motor diameter\u003c\/td\u003e\n\u003ctd\u003e25mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput shaft\u003c\/td\u003e\n\u003ctd\u003e4mm D shaft,3.5mm across flat;12mm projection,8mm flat length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGearbox length L\u003c\/td\u003e\n\u003ctd\u003e100:1 drawing reference98.78:1:23mm;165:1 drawing164.63:1:25mm;217:1 drawing217.31:1:25mm;478:1 drawing478.08:1:27mm. Confirm125:1 length before machining.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor section\u003c\/td\u003e\n\u003ctd\u003e14.8mm length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFront locating boss\u003c\/td\u003e\n\u003ctd\u003e7mm diameter,2.5mm projection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003e2×M3 tapped holes,2mm depth;17mm spacing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear boss\u003c\/td\u003e\n\u003ctd\u003e6mm diameter;3.7mm projection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLead and connector\u003c\/td\u003e\n\u003ctd\u003e150±10mm; PHR-4,2.0mm pitch; UL1571 AWG28 reference\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet motor mass\u003c\/td\u003e\n\u003ctd\u003eApproximately75g; varies with reduction ratio\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003e12V Performance Reference\u003c\/h2\u003e\u003cp\u003eOutput values below use700 input pulses per second. The unreduced motor step angle is15°; the smaller listed step angle applies after the gearbox. No-load output speed decreases under load.\u003c\/p\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eNominal ratio\u003c\/th\u003e\n\u003cth\u003ePerformance chart ratio\u003c\/th\u003e\n\u003cth\u003eOutput step\u003c\/th\u003e\n\u003cth\u003eNo-load rpm at700pps\u003c\/th\u003e\n\u003cth\u003eHolding kgf·cm\u003c\/th\u003e\n\u003cth\u003ePull-out kgf·cm\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e100:1\u003c\/td\u003e\n\u003ctd\u003e98.8:1\u003c\/td\u003e\n\u003ctd\u003e0.15°\u003c\/td\u003e\n\u003ctd\u003e17.7\u003c\/td\u003e\n\u003ctd\u003e≥6.5\u003c\/td\u003e\n\u003ctd\u003e≥5.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e125:1\u003c\/td\u003e\n\u003ctd\u003e125:1\u003c\/td\u003e\n\u003ctd\u003e0.12°\u003c\/td\u003e\n\u003ctd\u003e14\u003c\/td\u003e\n\u003ctd\u003e≥8.0\u003c\/td\u003e\n\u003ctd\u003e≥7.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e165:1\u003c\/td\u003e\n\u003ctd\u003e165:1\u003c\/td\u003e\n\u003ctd\u003e0.09°\u003c\/td\u003e\n\u003ctd\u003e10.6\u003c\/td\u003e\n\u003ctd\u003e9.0 max\u003c\/td\u003e\n\u003ctd\u003e9.0 max\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e217:1\u003c\/td\u003e\n\u003ctd\u003e217:1\u003c\/td\u003e\n\u003ctd\u003e0.069°\u003c\/td\u003e\n\u003ctd\u003e8.1\u003c\/td\u003e\n\u003ctd\u003e9.0 max\u003c\/td\u003e\n\u003ctd\u003e9.0 max\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e478:1\u003c\/td\u003e\n\u003ctd\u003e478:1\u003c\/td\u003e\n\u003ctd\u003e0.031°\u003c\/td\u003e\n\u003ctd\u003e3.7\u003c\/td\u003e\n\u003ctd\u003e9.0 max\u003c\/td\u003e\n\u003ctd\u003e9.0 max\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003e“9.0 max” is a maximum permissible load, not a minimum torque rating.\u003c\/strong\u003e Do not exceed9.0kgf·cm on the165:1,217:1 or478:1 configurations. Holding torque describes a stationary energized motor; it is not continuous running torque. Use the actual load and motion profile when selecting a ratio.\u003c\/p\u003e\u003ch2\u003eMotor Electrical Reference\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDrive reference\u003c\/td\u003e\n\u003ctd\u003e12V DC using L6219 driver reference; bipolar drive,2-phase excitation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePhase current\u003c\/td\u003e\n\u003ctd\u003e300mA per phase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePhase resistance\u003c\/td\u003e\n\u003ctd\u003e10Ω±7% per phase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePhase inductance\u003c\/td\u003e\n\u003ctd\u003e7.5mH per phase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor step angle before gearbox\u003c\/td\u003e\n\u003ctd\u003e15° per step\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor pull-out torque before gearbox\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;60gf·cm at100pps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor holding torque before gearbox\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;75gf·cm at0pps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum response \/ starting frequency\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;1300pps \/ \u0026gt;800pps reference\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInsulation\u003c\/td\u003e\n\u003ctd\u003eClass E coils;100MΩ at500V DC;100V AC for1second dielectric reference\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating temperature\u003c\/td\u003e\n\u003ctd\u003e−10°C to55°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eConnection and Driver Use\u003c\/h2\u003e\u003cp\u003eThis is a four-wire bipolar stepper motor requiring a compatible two-phase driver. It does not contain a self-running brushless DC commutation driver. Use a driver matched to the motor's300mA-per-phase reference and the actual supply; do not apply DC directly across arbitrary connector pins.\u003c\/p\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eConnector pin\u003c\/th\u003e\n\u003cth\u003eWire color\u003c\/th\u003e\n\u003cth\u003eWinding pair\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eYellow\u003c\/td\u003e\n\u003ctd\u003eYellow–Red winding\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eRed\u003c\/td\u003e\n\u003ctd\u003eYellow–Red winding\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003ctd\u003eBlack–Blue winding\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eBlue\u003c\/td\u003e\n\u003ctd\u003eBlack–Blue winding\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003cp\u003eVerify pin numbering and coil continuity before connecting. A two-phase excitation sequence is Yellow+Black, Yellow+Blue, Red+Blue, Red+Black; reverse the sequence to reverse rotation. Output-shaft direction depends on gearing and the viewing direction, so check it unloaded. Disconnect power before rewiring; do not force the output shaft, overload the gearbox or operate stalled.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cp\u003eThe high reduction ratios suit low-speed positioning, indexing and compact mechanisms that need small output steps. Allow for gearbox backlash and verify positioning performance in the actual mechanism. No closed-loop encoder or feedback controller is included.\u003c\/p\u003e\u003ch2\u003eWhat's Included\u003c\/h2\u003e\u003cp\u003eOne high-reduction stepper motor in the chosen ratio. The bracket, bare driver board or enclosed driver is included only when named in the selected Package. A power supply and example machinery are not included.\u003c\/p\u003e\u003ch2\u003eVisual Details\u003c\/h2\u003e\u003cfigure\u003e\u003ca href=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/chihai-gm25by-high-reduction-gears.webp?v=1792730459\" rel=\"noopener\" target=\"_blank\"\u003e\u003cimg alt=\"All-metal reduction gear train\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/chihai-gm25by-high-reduction-gears.webp?v=1792730459\" style=\"max-width:100%;height:auto\"\u003e\u003c\/a\u003e\u003cfigcaption\u003eAll-metal reduction gear train\u003c\/figcaption\u003e\u003c\/figure\u003e\u003cfigure\u003e\u003ca href=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/chihai-gm25by-high-reduction-pcb.webp?v=1792730464\" rel=\"noopener\" target=\"_blank\"\u003e\u003cimg alt=\"Protected motor wiring PCB\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/chihai-gm25by-high-reduction-pcb.webp?v=1792730464\" style=\"max-width:100%;height:auto\"\u003e\u003c\/a\u003e\u003cfigcaption\u003eProtected motor wiring PCB\u003c\/figcaption\u003e\u003c\/figure\u003e\u003cfigure\u003e\u003ca href=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/chihai-gm25by-high-reduction-shaft.webp?v=1792730468\" rel=\"noopener\" target=\"_blank\"\u003e\u003cimg alt=\"4mm D-shaped output shaft\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/chihai-gm25by-high-reduction-shaft.webp?v=1792730468\" style=\"max-width:100%;height:auto\"\u003e\u003c\/a\u003e\u003cfigcaption\u003e4mm D-shaped output shaft\u003c\/figcaption\u003e\u003c\/figure\u003e\u003cfigure\u003e\u003ca href=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/chihai-gm25by-high-reduction-performance.webp?v=1792730472\" rel=\"noopener\" target=\"_blank\"\u003e\u003cimg alt=\"High-reduction output performance\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/chihai-gm25by-high-reduction-performance.webp?v=1792730472\" style=\"max-width:100%;height:auto\"\u003e\u003c\/a\u003e\u003cfigcaption\u003eHigh-reduction output performance\u003c\/figcaption\u003e\u003c\/figure\u003e\u003cfigure\u003e\u003ca href=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/chihai-gm25by-high-reduction-wiring.webp?v=1792730476\" rel=\"noopener\" target=\"_blank\"\u003e\u003cimg alt=\"Connector and winding pairs\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/chihai-gm25by-high-reduction-wiring.webp?v=1792730476\" style=\"max-width:100%;height:auto\"\u003e\u003c\/a\u003e\u003cfigcaption\u003eConnector and winding pairs\u003c\/figcaption\u003e\u003c\/figure\u003e\u003cfigure\u003e\u003ca href=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/chihai-gm25by-high-reduction-dimensions.webp?v=1792730480\" rel=\"noopener\" target=\"_blank\"\u003e\u003cimg alt=\"Mechanical reference - dimensions in mm\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/chihai-gm25by-high-reduction-dimensions.webp?v=1792730480\" style=\"max-width:100%;height:auto\"\u003e\u003c\/a\u003e\u003cfigcaption\u003eMechanical reference - dimensions in mm\u003c\/figcaption\u003e\u003c\/figure\u003e","brand":"CHIHAI MOTOR","offers":[{"title":"Motor Only \/ 100:1","offer_id":68108824871136,"sku":"CHI-GM25BY-HR-6893-01","price":29.62,"currency_code":"USD","in_stock":true},{"title":"Motor Only \/ 125:1","offer_id":68108824903904,"sku":"CHI-GM25BY-HR-6893-02","price":29.62,"currency_code":"USD","in_stock":true},{"title":"Motor Only \/ 165:1","offer_id":68108824936672,"sku":"CHI-GM25BY-HR-6893-03","price":29.62,"currency_code":"USD","in_stock":true},{"title":"Motor Only \/ 217:1","offer_id":68108824969440,"sku":"CHI-GM25BY-HR-6893-04","price":29.62,"currency_code":"USD","in_stock":true},{"title":"Motor Only \/ 478:1","offer_id":68108825002208,"sku":"CHI-GM25BY-HR-6893-05","price":29.62,"currency_code":"USD","in_stock":true},{"title":"Motor + Bracket \/ 100:1","offer_id":68108825034976,"sku":"CHI-GM25BY-HR-6893-06","price":29.0,"currency_code":"USD","in_stock":true},{"title":"Motor + Bracket \/ 125:1","offer_id":68108825067744,"sku":"CHI-GM25BY-HR-6893-07","price":29.0,"currency_code":"USD","in_stock":true},{"title":"Motor + Bracket \/ 165:1","offer_id":68108825100512,"sku":"CHI-GM25BY-HR-6893-08","price":29.0,"currency_code":"USD","in_stock":true},{"title":"Motor + Bracket \/ 217:1","offer_id":68108825133280,"sku":"CHI-GM25BY-HR-6893-09","price":29.0,"currency_code":"USD","in_stock":true},{"title":"Motor + Bracket \/ 478:1","offer_id":68108825166048,"sku":"CHI-GM25BY-HR-6893-10","price":29.0,"currency_code":"USD","in_stock":true},{"title":"Motor + Driver Board \/ 100:1","offer_id":68108825198816,"sku":"CHI-GM25BY-HR-6893-11","price":45.15,"currency_code":"USD","in_stock":true},{"title":"Motor + Driver Board \/ 125:1","offer_id":68108825231584,"sku":"CHI-GM25BY-HR-6893-12","price":45.15,"currency_code":"USD","in_stock":true},{"title":"Motor + Driver Board \/ 165:1","offer_id":68108825264352,"sku":"CHI-GM25BY-HR-6893-13","price":45.15,"currency_code":"USD","in_stock":true},{"title":"Motor + Driver Board \/ 217:1","offer_id":68108825297120,"sku":"CHI-GM25BY-HR-6893-14","price":45.15,"currency_code":"USD","in_stock":true},{"title":"Motor + Driver Board \/ 478:1","offer_id":68108825329888,"sku":"CHI-GM25BY-HR-6893-15","price":45.15,"currency_code":"USD","in_stock":true},{"title":"Motor + Enclosed Driver \/ 100:1","offer_id":68108825362656,"sku":"CHI-GM25BY-HR-6893-16","price":47.31,"currency_code":"USD","in_stock":true},{"title":"Motor + Enclosed Driver \/ 125:1","offer_id":68108825395424,"sku":"CHI-GM25BY-HR-6893-17","price":47.31,"currency_code":"USD","in_stock":true},{"title":"Motor + Enclosed Driver \/ 165:1","offer_id":68108825428192,"sku":"CHI-GM25BY-HR-6893-18","price":47.31,"currency_code":"USD","in_stock":true},{"title":"Motor + Enclosed Driver \/ 217:1","offer_id":68108825460960,"sku":"CHI-GM25BY-HR-6893-19","price":47.31,"currency_code":"USD","in_stock":true},{"title":"Motor + Enclosed Driver \/ 478:1","offer_id":68108825493728,"sku":"CHI-GM25BY-HR-6893-20","price":47.31,"currency_code":"USD","in_stock":true},{"title":"Motor + Bracket + Driver Board \/ 100:1","offer_id":68108825526496,"sku":"CHI-GM25BY-HR-6893-21","price":48.31,"currency_code":"USD","in_stock":true},{"title":"Motor + Bracket + Driver Board \/ 125:1","offer_id":68108825559264,"sku":"CHI-GM25BY-HR-6893-22","price":48.31,"currency_code":"USD","in_stock":true},{"title":"Motor + Bracket + Driver Board \/ 165:1","offer_id":68108825592032,"sku":"CHI-GM25BY-HR-6893-23","price":48.31,"currency_code":"USD","in_stock":true},{"title":"Motor + Bracket + Driver Board \/ 217:1","offer_id":68108825624800,"sku":"CHI-GM25BY-HR-6893-24","price":48.31,"currency_code":"USD","in_stock":true},{"title":"Motor + Bracket + Driver Board \/ 478:1","offer_id":68108825657568,"sku":"CHI-GM25BY-HR-6893-25","price":48.31,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0643\/3210\/3904\/files\/chihai-gm25by-high-reduction-v1.jpg?v=1792730505","url":"https:\/\/rcdrone.top\/it\/products\/chihai-chs-gm25-25by-high-reduction-stepper-motor-100-478","provider":"RCDrone","version":"1.0","type":"link"}