{"product_id":"id-hq-series-coil-dw28490-9-angle-grinder-spare-part-makita-type-30375","title":"ID HQ SERIES COIL [DW28490] [9\"] ANGLE GRINDER SPARE PART [Makita Type] - 30375","description":"\u003ch2\u003eRestore Full Power — Genuine-Grade Coil Engineering for Your 9\" Angle Grinder\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eID HQ Series Field Coil for 9\" Angle Grinder (DW28490)\u003c\/strong\u003e is a precision-engineered \u003cstrong\u003eMakita-type replacement coil\u003c\/strong\u003e designed to restore full power output to your angle grinder. Built with \u003cstrong\u003ehigh-grade copper wire windings\u003c\/strong\u003e, premium insulation, and a laminated magnetic core, this \u003cstrong\u003epower tool spare part (Part No. 30375)\u003c\/strong\u003e delivers reliable \u003cstrong\u003eelectromagnetic energy conversion\u003c\/strong\u003e, ensuring your grinder operates at peak efficiency after every repair.\u003c\/p\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 40%; text-align: left; padding: 10px 10px 10px 0; vertical-align: top; font-size: 1.05em; background-color: #000000; color: #ffffff;\"\u003eKey Features\u003c\/th\u003e\n\u003cth style=\"width: 40%; text-align: left; padding: 10px 10px 10px 20px; vertical-align: top; font-size: 1.05em; background-color: #000000; color: #ffffff;\"\u003ePerfect For\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40%; text-align: left; vertical-align: top; padding: 10px 10px 10px 0;\"\u003e\n\u003cul style=\"margin: 0; padding-left: 18px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-temperature resistance\u003c\/strong\u003e for sustained heavy-duty operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-grade copper wire windings\u003c\/strong\u003e for maximum conductivity and minimal energy loss\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLaminated magnetic core\u003c\/strong\u003e for efficient electromagnetic field generation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMakita-type compatibility\u003c\/strong\u003e — direct replacement for DW28490 9\" angle grinders\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePremium insulation\u003c\/strong\u003e for electrical safety and coil longevity\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 40%; text-align: left; vertical-align: top; padding: 10px 10px 10px 20px;\"\u003e\n\u003cul style=\"margin: 0; padding-left: 18px;\"\u003e\n\u003cli\u003eRepairing \u003cstrong\u003eburnt-out or failed coils\u003c\/strong\u003e in 9\" angle grinders\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorkshop and site maintenance\u003c\/strong\u003e teams servicing Makita-compatible tools\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower tool repair technicians\u003c\/strong\u003e and service centres\u003c\/li\u003e\n\u003cli\u003eExtending the lifespan of \u003cstrong\u003eDW28490-type grinders\u003c\/strong\u003e rather than replacing the entire unit\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\u003eDirect Makita-Type Replacement (DW28490 Compatible):\u003c\/strong\u003e Engineered as a drop-in replacement coil specifically matched to the DW28490 9\" angle grinder platform. The dimensional tolerances, terminal configuration, and winding specifications are designed for compatibility with Makita-type motor housings, ensuring a straightforward, secure fit without modification.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Grade Copper Wire Windings for Maximum Efficiency:\u003c\/strong\u003e The coil is wound using high-conductivity copper wire, minimising electrical resistance and heat build-up during operation. This translates to better power transfer from the power supply to the grinder's rotor, maintaining consistent RPM under load — critical for cutting, grinding, and surface preparation tasks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLaminated Magnetic Core for Reduced Energy Loss:\u003c\/strong\u003e The laminated steel core construction significantly reduces eddy current losses within the coil, allowing more electrical energy to be converted into usable mechanical energy rather than wasted heat. This improves overall tool efficiency and reduces thermal stress on the motor assembly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Temperature Resistant Insulation for Demanding Environments:\u003c\/strong\u003e The copper windings are coated with premium insulation rated to withstand the elevated temperatures generated during sustained angle grinder operation. This protects the coil from premature degradation, short circuits, and insulation breakdown, even in environments where the grinder is used intensively over extended periods.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGenuine-Grade Quality Under Part No. 30375:\u003c\/strong\u003e Supplied under the HQ Series designation with part reference 30375, this coil is manufactured to meet or exceed the performance benchmarks of OEM field coils. It is a cost-effective repair solution that brings a worn or damaged 9\" angle grinder back to full operational specification without the cost of a full tool replacement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRestores Motor Output and Prevents Further Mechanical Damage:\u003c\/strong\u003e A failing or failed field coil directly causes loss of power, erratic motor behaviour, excessive sparking, and in severe cases, total motor seizure. Replacing the coil promptly with this HQ Series unit stops further mechanical damage to the armature and motor housing, protecting the broader tool investment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis HQ Series coil (Part No. 30375) is supplied as a single field coil unit intended for installation by a qualified power tool technician or experienced user. It is a genuine-grade aftermarket spare part and is not manufactured by or affiliated with Makita Corporation.\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 angle grinder?\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"faq-answer-content\"\u003e\n\u003cp\u003eThis coil is specifically engineered for \u003cstrong\u003eDW28490 9\" angle grinders of the Makita type\u003c\/strong\u003e. If your grinder uses the same motor housing and terminal configuration as the DW28490 platform, this is a direct replacement. Always confirm your grinder's model number and existing coil part reference before purchasing. If in doubt, our team can assist with compatibility confirmation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003e\u003cspan class=\"question-title\"\u003eIs this an original Makita part or an aftermarket spare?\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"faq-answer-content\"\u003e\n\u003cp\u003eThis is a \u003cstrong\u003ehigh-quality aftermarket (HQ Series) spare part\u003c\/strong\u003e manufactured to meet or exceed the performance specifications of OEM coils. It is not manufactured by or affiliated with Makita Corporation. The HQ Series designation indicates it is produced to a genuine-grade standard, offering a reliable and cost-effective repair alternative to OEM parts.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003e\u003cspan class=\"question-title\"\u003eWhy should I replace the coil rather than buying a new angle grinder?\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"faq-answer-content\"\u003e\n\u003cp\u003eReplacing a \u003cstrong\u003efailed field coil\u003c\/strong\u003e is significantly more economical than purchasing a new 9\" angle grinder. The coil is one of the most common failure points in angle grinders due to heat and electrical stress over time. With a \u003cstrong\u003ePart No. 30375 HQ Series replacement coil\u003c\/strong\u003e, you can restore your DW28490-type grinder to full operational specification at a fraction of the cost of a new tool, making it the smart choice for workshops, tradespeople, and repair technicians.\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 the field coil do in 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 responsible for generating a strong electromagnetic field within the motor housing. When electrical current passes through the \u003cstrong\u003ecopper wire windings\u003c\/strong\u003e wrapped around the \u003cstrong\u003elaminated magnetic core\u003c\/strong\u003e, it produces this field, which interacts with the armature (rotor) to generate rotational mechanical energy — converting electrical energy from your power supply into the spinning force that drives the grinder disc.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003e\u003cspan class=\"question-title\"\u003eCan I install this coil myself, or do I need a technician?\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"faq-answer-content\"\u003e\n\u003cp\u003eWhile an experienced power tool user with the correct tools may be able to replace the field coil, we strongly recommend installation by a \u003cstrong\u003equalified power tool repair technician\u003c\/strong\u003e. Angle grinder disassembly involves working with electrical components, and incorrect installation can result in motor damage, electrical hazards, or tool malfunction. Always disconnect the tool from the power supply before any internal work.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003e\u003cspan class=\"question-title\"\u003eHow do I know if my field coil has failed?\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"faq-answer-content\"\u003e\n\u003cp\u003eCommon signs of a \u003cstrong\u003efailed or failing field coil\u003c\/strong\u003e include significant loss of power output, the grinder running erratically or at inconsistent speeds, excessive sparking from the motor area, a burning smell from the motor housing, or the tool failing to start altogether. A technician can confirm coil failure using a \u003cstrong\u003emultimeter to test coil resistance\u003c\/strong\u003e — an open circuit or reading significantly outside specification confirms the coil needs replacement.\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 — will replacing the coil fix it?\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"faq-answer-content\"\u003e\n\u003cp\u003eA \u003cstrong\u003edegraded or partially failed field coil\u003c\/strong\u003e is one of the most common causes of power loss in angle grinders. If your DW28490-type grinder has progressively lost power, struggles under load, or runs at reduced speed, the field coil is a strong candidate for diagnosis. Replacing it with this \u003cstrong\u003eHQ Series Part No. 30375 coil\u003c\/strong\u003e can fully restore motor output — provided the armature, brushes, and bearings are in serviceable condition.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003e\u003cspan class=\"question-title\"\u003eMy grinder is sparking excessively — could the coil be the cause?\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"faq-answer-content\"\u003e\n\u003cp\u003eExcessive sparking can result from worn carbon brushes, a damaged armature, or a \u003cstrong\u003edeteriorating field coil with compromised insulation\u003c\/strong\u003e. When the coil's insulation breaks down, it can cause short circuits that increase brush sparking significantly. If brush replacement has not resolved the issue, the field coil should be tested for insulation resistance. Replacing it with this \u003cstrong\u003ehigh-temperature resistant HQ Series unit\u003c\/strong\u003e may fully resolve the sparking.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003e\u003cspan class=\"question-title\"\u003eWill this coil fit if my grinder is a different brand but uses the DW28490 spec?\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"faq-answer-content\"\u003e\n\u003cp\u003eThis coil is designed for \u003cstrong\u003eMakita-type DW28490 9\" angle grinder motors\u003c\/strong\u003e. Many aftermarket and compatible-brand grinders use motor assemblies built to the same platform specification. If your grinder's motor housing, coil dimensions, and terminal positions match the DW28490 specification, this coil should fit. We recommend cross-referencing your existing coil's dimensions and part number, or consulting a qualified technician before installation.\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":49792103645399,"sku":"30375","price":37.0,"currency_code":"AED","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0714\/1962\/5687\/files\/IDHQSERIESCOIL_DW28490_9INCH_ANGLEGRINDERSPAREPART_MakitaType_-30375_be9f5e2b-74a2-4489-942b-30b374390dae.jpg?v=1789480644","url":"https:\/\/www.idealpowertools.com\/products\/id-hq-series-coil-dw28490-9-angle-grinder-spare-part-makita-type-30375","provider":"Ideal Power Tools","version":"1.0","type":"link"}