{"product_id":"id-hq-series-armature-hm0870c-demolition-hammer-spare-part-bosch-type-30307","title":"ID HQ SERIES ARMATURE [HM0870C] DEMOLITION HAMMER SPARE PART [Bosch Type] - 30307","description":"\u003ch2\u003eRestore Peak Impact Power — Built to Bosch HM0870C Specifications\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eID HQ Series Armature for the HM0870C Demolition Hammer\u003c\/strong\u003e (Bosch Type, Part No. 30307) is a precision-engineered \u003cstrong\u003epower tool spare part\u003c\/strong\u003e designed to restore your demolition hammer to full working capacity. Featuring a \u003cstrong\u003ehigh-grade magnetic core\u003c\/strong\u003e, optimised copper winding, and a precision-machined commutator, this \u003cstrong\u003ereplacement armature\u003c\/strong\u003e converts electrical energy into reliable rotational force, delivering the sustained impact performance your heavy-duty tool demands.\u003c\/p\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40%; vertical-align: top; text-align: left; padding: 12px; border: 1px solid #e0e0e0; background-color: #000000; color: #ffffff;\"\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 40%; vertical-align: top; text-align: left; padding: 12px; border: 1px solid #e0e0e0; 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; text-align: left; padding: 12px; border: 1px solid #e0e0e0;\"\u003e\n\u003cul style=\"margin: 0; padding-left: 18px;\"\u003e\n\u003cli\u003eDirect-fit replacement for the \u003cstrong\u003eBosch HM0870C\u003c\/strong\u003e demolition hammer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision-wound copper coil\u003c\/strong\u003e for efficient energy conversion and minimal heat build-up\u003c\/li\u003e\n\u003cli\u003eHigh-density \u003cstrong\u003emagnetic core\u003c\/strong\u003e engineered for maximum torque and consistent rotational output\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision-machined commutator\u003c\/strong\u003e for smooth brush contact and reduced arcing\u003c\/li\u003e\n\u003cli\u003eManufactured to \u003cstrong\u003eOEM-equivalent tolerances\u003c\/strong\u003e for a secure, vibration-resistant fit\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 40%; vertical-align: top; text-align: left; padding: 12px; border: 1px solid #e0e0e0;\"\u003e\n\u003cul style=\"margin: 0; padding-left: 18px;\"\u003e\n\u003cli\u003eRepairing a \u003cstrong\u003eburnt-out or failed HM0870C armature\u003c\/strong\u003e to avoid costly tool replacement\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfessional power tool technicians\u003c\/strong\u003e and service workshops handling Bosch-type demolition hammers\u003c\/li\u003e\n\u003cli\u003eConstruction and demolition contractors requiring \u003cstrong\u003efast, reliable field repairs\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eFacilities and maintenance teams managing a fleet of \u003cstrong\u003eheavy-duty power tools\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\u003eDirect OEM-Compatible Fitment (Part No. 30307):\u003c\/strong\u003e Engineered specifically as a drop-in replacement for the \u003cstrong\u003eBosch HM0870C demolition hammer armature\u003c\/strong\u003e, this spare part eliminates guesswork during installation. The precise shaft diameter, lamination stack length, and commutator segment count are matched to original factory specifications, ensuring proper alignment with the field coil assembly and gear housing without requiring modification.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Efficiency Copper Winding for Sustained Performance:\u003c\/strong\u003e The armature winding uses \u003cstrong\u003ehigh-purity copper wire\u003c\/strong\u003e wound to an exact turn count and pitch, minimising resistive losses and heat generation under prolonged load. This is critical in demolition applications where the tool operates continuously — poor winding quality leads to rapid insulation breakdown and premature failure, which this HQ Series component is designed to prevent.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRobust Magnetic Core Construction:\u003c\/strong\u003e The laminated \u003cstrong\u003esilicon-steel magnetic core\u003c\/strong\u003e reduces eddy current losses, maintaining strong and consistent magnetic flux even during high-impact, high-vibration operation. The tight lamination bonding resists loosening caused by the cyclical mechanical stress inherent to \u003cstrong\u003eSDS-max and chisel demolition work\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision-Machined Commutator for Reliable Brush Interface:\u003c\/strong\u003e The \u003cstrong\u003emachined copper commutator segments\u003c\/strong\u003e are undercut to the correct depth, ensuring clean carbon brush contact that minimises sparking and brush wear. A rough or out-of-round commutator is a leading cause of repeated armature failure — the HQ Series component addresses this with tight roundness tolerances that extend the service life of both the armature and the brushes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBalanced Rotor Assembly for Low-Vibration Operation:\u003c\/strong\u003e Each armature undergoes dynamic balancing to reduce the vibration transferred through the tool body. In a \u003cstrong\u003eheavy-duty demolition hammer\u003c\/strong\u003e, an unbalanced armature accelerates bearing wear and reduces operator comfort during extended use. The balanced rotor contributes to longer bearing life and a more controlled tool feel on site.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeat-Resistant Insulation Class:\u003c\/strong\u003e The winding insulation is rated for high operating temperatures, protecting the copper conductors during demanding demolition tasks such as \u003cstrong\u003econcrete breaking, tile removal, and masonry chiselling\u003c\/strong\u003e. The insulation system prevents inter-winding shorts that are a common failure mode in lower-quality replacement armatures.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis spare part is supplied with the armature assembly ready for installation. It is compatible with Bosch HM0870C demolition hammers and is verified against OEM part number 30307 for reference during procurement and workshop ordering.\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 armature compatible with the Bosch HM0870C demolition hammer?\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"faq-answer-content\"\u003e\n\u003cp\u003eYes. The \u003cstrong\u003eID HQ Series Armature (Part No. 30307)\u003c\/strong\u003e is engineered specifically as a direct replacement for the \u003cstrong\u003eBosch HM0870C demolition hammer\u003c\/strong\u003e. The shaft diameter, commutator dimensions, and lamination stack are matched to OEM specifications for a fit-and-function replacement without modification.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003e\u003cspan class=\"question-title\"\u003eHow does this aftermarket armature compare to the original Bosch part?\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"faq-answer-content\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eID HQ Series armature\u003c\/strong\u003e is manufactured to OEM-equivalent tolerances, using \u003cstrong\u003ehigh-purity copper winding\u003c\/strong\u003e, a precision-machined commutator, and a balanced rotor assembly. While it is an aftermarket component, it is designed to meet or match the performance and service life of the original part — at a significantly lower cost, making it the preferred choice for \u003cstrong\u003erepair workshops and professional technicians\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003e\u003cspan class=\"question-title\"\u003eCan I use this armature for other Bosch demolition hammer models?\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"faq-answer-content\"\u003e\n\u003cp\u003eThis armature is validated specifically for the \u003cstrong\u003eBosch HM0870C\u003c\/strong\u003e and is referenced under part number \u003cstrong\u003e30307\u003c\/strong\u003e. While some Bosch-type demolition hammers share similar internals, we recommend confirming compatibility against your tool's model number and part reference before ordering. Using an incorrectly matched armature can result in fitment issues or accelerated wear.\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 is the role of the armature in a demolition hammer?\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"faq-answer-content\"\u003e\n\u003cp\u003eThe \u003cstrong\u003earmature\u003c\/strong\u003e is the rotating component of the electric motor inside the demolition hammer. It consists of a \u003cstrong\u003elaminated magnetic core, copper winding, and commutator\u003c\/strong\u003e. When electrical current flows through the winding, the magnetic interaction with the field coil causes the armature to rotate, transmitting mechanical energy to the hammer's impact mechanism. A damaged or failed armature results in loss of power, overheating, or complete tool 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 know if my HM0870C armature needs replacing?\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"faq-answer-content\"\u003e\n\u003cp\u003eCommon signs of a failing \u003cstrong\u003eHM0870C armature\u003c\/strong\u003e include excessive sparking at the brush contact area, loss of power or intermittent operation, a burning smell during use, visible damage to the commutator segments, or the tool failing to start entirely. If your tool shows any of these symptoms after ruling out a carbon brush issue, the \u003cstrong\u003earmature is likely the faulty component\u003c\/strong\u003e and should be replaced.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003e\u003cspan class=\"question-title\"\u003eDo I need to replace the carbon brushes when fitting a new armature?\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"faq-answer-content\"\u003e\n\u003cp\u003eIt is strongly recommended to \u003cstrong\u003einspect and replace the carbon brushes\u003c\/strong\u003e whenever a new armature is installed. Worn or damaged brushes that caused the original armature failure will rapidly wear the commutator surface of the new part. Fitting fresh brushes alongside the replacement armature ensures a clean mating surface and maximises the service life of the \u003cstrong\u003eHQ Series armature\u003c\/strong\u003e.\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 HM0870C is losing power mid-use — will replacing the armature fix this?\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"faq-answer-content\"\u003e\n\u003cp\u003eIntermittent power loss in a \u003cstrong\u003eBosch HM0870C\u003c\/strong\u003e is frequently caused by a failing armature, particularly when the copper winding insulation degrades due to heat or the commutator becomes worn or pitted. Installing a new \u003cstrong\u003eID HQ Series Armature (Part No. 30307)\u003c\/strong\u003e will restore full motor output — provided the field coil, carbon brushes, and power switch are also in serviceable condition. A complete diagnostic check of all motor components is recommended before and after the repair.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003e\u003cspan class=\"question-title\"\u003eThe demolition hammer is sparking heavily inside — is this an armature issue?\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"faq-answer-content\"\u003e\n\u003cp\u003eHeavy sparking at the brush area of your \u003cstrong\u003edemolition hammer\u003c\/strong\u003e is a strong indicator of commutator damage or winding failure within the armature. A scored, eccentric, or shorted commutator disrupts the clean electrical contact between brushes and armature, causing excessive arcing. Replacing the armature with the \u003cstrong\u003eHQ Series unit\u003c\/strong\u003e — which features a precision-machined, correctly undercut commutator — will eliminate this issue and prevent further damage to the carbon brushes and field coil.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003e\u003cspan class=\"question-title\"\u003eIs it cost-effective to repair my HM0870C with a replacement armature rather than buying a new tool?\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"faq-answer-content\"\u003e\n\u003cp\u003eIn most cases, yes. \u003cstrong\u003eDemolition hammers\u003c\/strong\u003e are high-value tools, and armature failure is one of the most common and repairable faults. The \u003cstrong\u003eID HQ Series Armature (Part No. 30307)\u003c\/strong\u003e offers a cost-efficient repair path that restores the tool to full operational performance at a fraction of the cost of a new machine. For professional contractors and service workshops managing multiple tools, maintaining a stock of critical spare parts like this armature significantly reduces downtime and total cost of ownership.\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":49792102826199,"sku":"30307","price":22.0,"currency_code":"AED","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0714\/1962\/5687\/files\/IDHQSERIESARMATURE_HM0870C_DEMOLITIONHAMMERSPAREPART_BoschType_-30307.jpg?v=1789480437","url":"https:\/\/www.idealpowertools.com\/products\/id-hq-series-armature-hm0870c-demolition-hammer-spare-part-bosch-type-30307","provider":"Ideal Power Tools","version":"1.0","type":"link"}