{"product_id":"dewalt-n660685-gear-assembly-second-reduction","title":"Dewalt n660685 Gear Assembly Second Reduction","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe DEWALT n660685 is a second reduction gear assembly used in DEWALT power tools to transfer and reduce rotational speed from the motor stage to the output drive. This internal drivetrain component manages torque multiplication through a secondary gear stage, allowing the tool to deliver the correct output speed and force at the chuck or drive. It is a direct replacement part installed by power tool repair technicians, authorized service centers, or experienced trade professionals performing field repairs on compatible DEWALT tools.\u003c\/p\u003e\u003cp\u003eThis gear assembly is intended for service and repair applications where the second reduction stage has experienced wear, gear tooth damage, or mechanical failure. It fits within the internal gearbox housing of the compatible tool and is typically replaced as part of a drivetrain rebuild. Proper installation requires disassembly of the tool housing and removal of the existing gear stage.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSecond reduction gear stage for torque multiplication and speed step-down\u003c\/li\u003e\n\u003cli\u003eOEM DEWALT replacement part — direct fit for compatible tool models\u003c\/li\u003e\n\u003cli\u003eDesigned for internal gearbox installation within compatible DEWALT power tools\u003c\/li\u003e\n\u003cli\u003eSupports accurate output speed and torque delivery at the tool drive\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement gear assembly for compatible DEWALT power tools requiring second reduction stage service. Refer to your tool model's parts diagram to confirm fitment before ordering.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified power tool repair technician or authorized service center. Disconnect the tool from all power sources and remove the battery pack before beginning disassembly. Full gearbox disassembly is required to access and replace the second reduction gear assembly. Consult the applicable tool service manual for correct reassembly sequence and torque specifications.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\u003cli\u003e\n\u003cstrong\u003eComponent Type\u003c\/strong\u003e: Second Reduction Gear Assembly\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: DEWALT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: n660685\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"DEWALT","offers":[{"title":"Default Title","offer_id":51199421677874,"sku":"N660685","price":31.61,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/307142320.jpg?v=1779682705","url":"https:\/\/voomisupply.com\/products\/dewalt-n660685-gear-assembly-second-reduction","provider":"Voomi Supply","version":"1.0","type":"link"}