{"product_id":"id-hq-series-coil-g18se3-7-angle-grinder-spare-part-makita-type-30377","title":"ID HQ SERIES COIL [G18SE3] [7\"] ANGLE GRINDER SPARE PART [Makita Type] - 30377","description":"\u003ch2\u003eRestore Full Power — The Right Coil, Built to Last\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eID HQ Series Field Coil for 7\" Angle Grinder [G18SE3]\u003c\/strong\u003e — Part No. 30377 — is a precision-engineered \u003cstrong\u003eMakita-type replacement coil\u003c\/strong\u003e built to restore full power output to your angle grinder. Featuring \u003cstrong\u003ehigh-grade copper wire windings\u003c\/strong\u003e, robust insulation, and a high-permeability magnetic core, this \u003cstrong\u003efield coil spare part\u003c\/strong\u003e delivers efficient electromagnetic energy transfer, ensuring your grinder operates at peak performance with minimal heat build-up and maximum motor longevity.\u003c\/p\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin: 24px 0;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40%; vertical-align: top; padding: 12px 16px 12px 0; text-align: left; background-color: #000000; color: #ffffff;\"\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 40%; vertical-align: top; padding: 12px 0 12px 16px; text-align: left; background-color: #000000; color: #ffffff;\"\u003e\u003cstrong\u003ePerfect For\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40%; vertical-align: top; padding: 8px 16px 8px 0; text-align: left;\"\u003e\n\u003cul style=\"margin: 0; padding-left: 18px;\"\u003e\n\u003cli\u003eDirect-fit \u003cstrong\u003eMakita-type G18SE3\u003c\/strong\u003e compatibility\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-temperature resistant\u003c\/strong\u003e insulation for sustained heavy-duty use\u003c\/li\u003e\n\u003cli\u003ePrecision \u003cstrong\u003ecopper wire windings\u003c\/strong\u003e for efficient electromagnetic field generation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-permeability magnetic core\u003c\/strong\u003e for maximum energy conversion\u003c\/li\u003e\n\u003cli\u003eOEM-spec dimensions for a \u003cstrong\u003edrop-in replacement\u003c\/strong\u003e with no modification required\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 40%; vertical-align: top; padding: 8px 0 8px 16px; text-align: left;\"\u003e\n\u003cul style=\"margin: 0; padding-left: 18px;\"\u003e\n\u003cli\u003eRepairing a \u003cstrong\u003eburned-out or failed angle grinder motor coil\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003ePreventive maintenance on \u003cstrong\u003ehigh-usage 7\" angle grinders\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eWorkshop and \u003cstrong\u003eprofessional trade tool servicing\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eReducing equipment downtime on \u003cstrong\u003econstruction and fabrication sites\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMakita-Type G18SE3 Direct Compatibility:\u003c\/strong\u003e Engineered as a precise \u003cstrong\u003eOEM-equivalent field coil\u003c\/strong\u003e for the G18SE3 7\" angle grinder platform. Every dimension — winding count, core geometry, and terminal placement — is matched to factory specifications, ensuring a seamless fit with zero rework and full motor performance restoration from the first run.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Grade Copper Wire Windings for Superior Conductivity:\u003c\/strong\u003e The coil uses \u003cstrong\u003ethick-gauge, high-purity copper wire\u003c\/strong\u003e wound to tight tolerances. Copper's low electrical resistance minimises energy loss, reduces operating temperature, and sustains consistent torque output even during extended grinding sessions — critical for metalworking, tile cutting, and surface preparation applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Temperature Resistant Insulation:\u003c\/strong\u003e The winding insulation is rated for the extreme thermal environment inside a working angle grinder motor. This \u003cstrong\u003eheat-resistant enamel coating\u003c\/strong\u003e prevents inter-winding short circuits caused by overheating — the primary failure mode of inferior aftermarket coils — significantly extending service life under continuous load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Permeability Magnetic Core for Efficient Energy Transfer:\u003c\/strong\u003e The laminated silicon-steel magnetic core channels the electromagnetic field generated by the coil windings with minimal flux leakage. This maximises the \u003cstrong\u003eelectromechanical energy conversion efficiency\u003c\/strong\u003e, translating more electrical input directly into rotational mechanical output at the armature — delivering the full rated RPM and torque your grinder is designed for.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrop-In Replacement Design — No Special Tools Required:\u003c\/strong\u003e The ID HQ Series coil is manufactured to \u003cstrong\u003eexact OEM replacement dimensions\u003c\/strong\u003e with pre-formed terminal connectors. Installation follows the standard field coil replacement procedure: remove the brush assembly, extract the worn coil, seat the new coil into the stator housing, and reconnect the terminals — restoring your angle grinder to full working condition without costly professional repair fees.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number 30377 — Genuine HQ Series Quality:\u003c\/strong\u003e Catalogued under \u003cstrong\u003ePart No. 30377\u003c\/strong\u003e in the ID HQ Series spare parts range, this coil is traceable, stocked consistently, and backed by ID's quality control standards. Each unit is packaged to prevent transit damage and includes all components required for a complete field coil installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis \u003cstrong\u003eID HQ Series Field Coil\u003c\/strong\u003e is supplied ready for installation and includes all necessary connection terminals for a complete replacement. It carries the relevant quality certifications applicable to electrical spare parts in its class, confirming it meets the safety and performance standards expected of professional-grade power tool components.\u003c\/p\u003e\n\u003c!-- CSS Styles for the FAQ Section --\u003e\n\u003cstyle\u003e\n.faq-section-styled {\n  font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, Helvetica, Arial, sans-serif;\n  margin-top: 40px;\n}\n.faq-section-styled h2 {\n  font-size: 2em;\n  font-weight: 700;\n  color: #1C2228;\n  border-bottom: 2px solid #F4F4F4;\n  padding-bottom: 15px;\n  margin-bottom: 30px;\n}\n.faq-section-styled details {\n  background-color: #f9f9f9;\n  border: 1px solid #e9e9e9;\n  border-radius: 8px;\n  margin-bottom: 15px;\n  overflow: hidden;\n}\n.faq-section-styled summary {\n  display: flex;\n  justify-content: space-between;\n  align-items: center;\n  padding: 20px;\n  font-weight: 600;\n  font-size: 1.1em;\n  color: #1C2228;\n  cursor: pointer;\n  list-style: none;\n}\n.faq-section-styled summary::-webkit-details-marker {\n  display: none;\n}\n.faq-section-styled .question-title {\n  display: flex;\n  align-items: center;\n}\n.faq-section-styled .question-title::before {\n  content: '\\25B6';\n  margin-right: 15px;\n  font-size: 0.8em;\n  color: #1C2228;\n}\n.faq-section-styled summary::after {\n  content: '+';\n  font-size: 1.8em;\n  font-weight: 300;\n  color: #1C2228;\n  transition: transform 0.2s ease-in-out;\n}\n.faq-section-styled details[open] summary::after {\n  transform: rotate(45deg);\n}\n.faq-section-styled .faq-answer-content {\n  background-color: #FFFFFF;\n  padding: 20px 20px 20px 55px;\n  border-top: 1px solid #e9e9e9;\n}\n.faq-section-styled .faq-answer-content p {\n  margin: 0;\n  font-size: 1em;\n  line-height: 1.7;\n  color: #2E2E2E;\n  text-align: left;\n}\n.faq-section-styled .faq-answer-content p strong {\n    color: #1C2228;\n}\n\u003c\/style\u003e\n\u003cdiv class=\"faq-section-styled\"\u003e\n\u003ch2\u003eGeneral Purchase \u0026amp; Comparison Queries\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003e\u003cspan class=\"question-title\"\u003eIs this coil compatible with my Makita 7\" angle grinder?\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"faq-answer-content\"\u003e\n\u003cp\u003eThis is an \u003cstrong\u003eID HQ Series Makita-type field coil\u003c\/strong\u003e designed specifically for the \u003cstrong\u003eG18SE3 7\" angle grinder\u003c\/strong\u003e platform. It is not an official Makita OEM part but is engineered to \u003cstrong\u003eexact OEM-equivalent specifications\u003c\/strong\u003e — matching winding count, core dimensions, and terminal layout — making it a direct drop-in replacement for compatible G18SE3 models. Always verify your grinder's model number and part number (30377) before purchasing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003e\u003cspan class=\"question-title\"\u003eHow does the ID HQ Series coil compare to cheaper aftermarket alternatives?\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"faq-answer-content\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eID HQ Series field coil\u003c\/strong\u003e uses \u003cstrong\u003ehigh-purity copper windings\u003c\/strong\u003e and \u003cstrong\u003eheat-resistant insulation\u003c\/strong\u003e rated for the sustained thermal loads inside a working grinder motor — specifications that budget alternatives frequently compromise on. Inferior coils typically use lower-grade wire with thinner insulation, leading to premature failure under continuous heavy-duty use. The HQ Series is built for \u003cstrong\u003eprofessional and trade environments\u003c\/strong\u003e where tool downtime is costly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003e\u003cspan class=\"question-title\"\u003eIs it more cost-effective to replace the coil or buy a new angle grinder?\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"faq-answer-content\"\u003e\n\u003cp\u003eFor a quality 7\" angle grinder, \u003cstrong\u003ereplacing the field coil is significantly more cost-effective\u003c\/strong\u003e than purchasing a new unit. The field coil is one of the most common failure points in an angle grinder motor, and with a \u003cstrong\u003edirect-fit Part No. 30377 replacement\u003c\/strong\u003e, the repair can be completed quickly without specialist tools. If the armature, gear assembly, and housing are in good condition, a new coil will restore the grinder to full rated performance at a fraction of the replacement cost.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003ch2\u003eProduct-Specific and Usage Queries\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003e\u003cspan class=\"question-title\"\u003eWhat does a field coil do inside an angle grinder?\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"faq-answer-content\"\u003e\n\u003cp\u003eThe \u003cstrong\u003efield coil (stator coil)\u003c\/strong\u003e is the stationary winding inside the angle grinder motor responsible for generating the \u003cstrong\u003eelectromagnetic field\u003c\/strong\u003e that drives the rotating armature. When electrical current passes through the \u003cstrong\u003ecopper wire windings\u003c\/strong\u003e, it magnetises the \u003cstrong\u003ehigh-permeability magnetic core\u003c\/strong\u003e, producing a powerful flux field. This field interacts with the armature windings to create the rotational force (torque) that drives the grinding disc. A failed or degraded field coil results in reduced power, excessive heat, or complete motor failure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003e\u003cspan class=\"question-title\"\u003eHow do I install the G18SE3 field coil replacement?\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"faq-answer-content\"\u003e\n\u003cp\u003eInstallation follows a standard field coil replacement procedure. First, \u003cstrong\u003edisconnect the grinder from the power supply\u003c\/strong\u003e and remove the brush caps to release the carbon brushes. Unscrew the motor housing to access the stator assembly. Carefully note the \u003cstrong\u003eterminal wiring orientation\u003c\/strong\u003e before disconnecting the old coil. Remove the worn coil from the stator housing, seat the new \u003cstrong\u003eID HQ Series Part No. 30377 coil\u003c\/strong\u003e into position, reconnect the terminals, and reassemble in reverse order. Always test at no-load before returning the tool to service.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003e\u003cspan class=\"question-title\"\u003eWhat are the symptoms of a failing field coil in a 7\" angle grinder?\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"faq-answer-content\"\u003e\n\u003cp\u003eCommon signs of a \u003cstrong\u003efailing or burned field coil\u003c\/strong\u003e include: significant reduction in motor power or speed under load, the grinder running intermittently or cutting out during use, a \u003cstrong\u003eburning smell or visible scorch marks\u003c\/strong\u003e on the motor housing, excessive sparking at the brushes beyond normal wear, and in complete failure cases, the motor not starting at all despite the power switch functioning. If you observe any of these symptoms, inspect the \u003cstrong\u003efield coil and armature\u003c\/strong\u003e before assuming broader motor failure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003ch2\u003eProblem\/Solution-Oriented Queries\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003e\u003cspan class=\"question-title\"\u003eMy angle grinder has lost power but still runs — could the coil be the issue?\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"faq-answer-content\"\u003e\n\u003cp\u003eYes. A \u003cstrong\u003epartially failed field coil\u003c\/strong\u003e — caused by inter-winding short circuits from insulation breakdown or heat damage — can reduce the strength of the electromagnetic field without completely stopping the motor. The result is a grinder that still runs but delivers \u003cstrong\u003enoticeably reduced torque and RPM\u003c\/strong\u003e, particularly under cutting or grinding load. Replacing the field coil with a new \u003cstrong\u003eID HQ Series Part No. 30377\u003c\/strong\u003e unit will restore full electromagnetic output and return the grinder to its rated performance specifications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003e\u003cspan class=\"question-title\"\u003eThe grinder overheats quickly — can a new coil fix this?\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"faq-answer-content\"\u003e\n\u003cp\u003eRapid overheating is frequently caused by a \u003cstrong\u003edegraded field coil with compromised insulation\u003c\/strong\u003e, which creates internal short circuits that increase resistive losses and generate excess heat within the motor. Replacing the worn coil with the \u003cstrong\u003eID HQ Series high-temperature resistant field coil\u003c\/strong\u003e eliminates this source of thermal runaway. However, also check that the \u003cstrong\u003eventilation slots are clear of debris\u003c\/strong\u003e and that the carbon brushes are not worn beyond their service limit, as these can contribute independently to overheating.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003e\u003cspan class=\"question-title\"\u003eI replaced the brushes but the grinder still underperforms — what next?\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"faq-answer-content\"\u003e\n\u003cp\u003eIf \u003cstrong\u003enew carbon brushes have not restored performance\u003c\/strong\u003e, the field coil or armature is the next most likely cause. Use a \u003cstrong\u003emultimeter to test the field coil\u003c\/strong\u003e for continuity and check for short circuits between windings or between windings and the core. An open circuit or very low resistance reading indicates a failed coil. Replacing it with the \u003cstrong\u003eID HQ Series Part No. 30377 field coil\u003c\/strong\u003e is the logical next repair step before considering armature replacement, as the coil is both more accessible and more commonly the root cause of sustained underperformance after brush replacement.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e","brand":"Ideal Power Tools","offers":[{"title":"Default Title","offer_id":49792103678167,"sku":"30377","price":36.0,"currency_code":"AED","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0714\/1962\/5687\/files\/IDHQSERIESCOIL_G18SE3_7INCH_ANGLEGRINDERSPAREPART_MakitaType_-30377.jpg?v=1789480620","url":"https:\/\/www.idealpowertools.com\/products\/id-hq-series-coil-g18se3-7-angle-grinder-spare-part-makita-type-30377","provider":"Ideal Power Tools","version":"1.0","type":"link"}