{"product_id":"hmr-5022","title":"HMR-5022 Hammersaw Motor (BETA)","description":"\u003ch2\u003eLegendary RDY-5022 - now with Single Arm Support\u003cstrong\u003e\u003c\/strong\u003e\n\u003c\/h2\u003e\n\u003cp class=\"\"\u003e\u003cstrong\u003eLots of \u003ca href=\"https:\/\/grabcad.com\/library\/just-cuz-spinner-blade-designs-beetle-3lb-and-ant-1lb-for-hubmotors-and-jcr-4935-1\" title=\"cad for blades\"\u003eblade design CAD files\u003c\/a\u003e are now available for free! Note: a blade is not included with the purchase of a motor. \u003ca href=\"https:\/\/grabcad.com\/library\/hmr-5022-v1-0-hammersaw-hubmotor-for-combat-robotics-1\"\u003eMotor CAD is here.\u003c\/a\u003e\u003c\/strong\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"\"\u003eWhile the RDY-5022 V2 has proven to be the go-to choice for hammersaws in recent years, one common modification was often made - a drilled-through stator mount allowing use of a shoulder bolt through the motor center. We've decided to make a special version for the 5022 for single-arm hammersaws and other single side supported applications, which adds this change out of the box - plus another big one. The blade mounting is reversed to make the lever arm as small as possible when delivering a hit, making arms twist less, and more force is just piercing top plates. \u003cbr\u003e\u003cbr\u003eWe're looking to get a small batch beta tested so these are going at a reduced price, and there is a limited stock available. \u003c\/p\u003e\n\u003cp class=\"\"\u003e\u003cem\u003e\u003cstrong\u003eWhat's Included when you buy a Complete Motor:\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e1X HMR-5022 complete motor!\u003c\/li\u003e\n\u003cli\u003e1X 6mm x 30mm Shoulder Bolt with M5 thread\u003c\/li\u003e\n\u003cli\u003e1X M5 Lock Nut\u003c\/li\u003e\n\u003cli\u003e3X Shoulder Bolt Spacers (0.032\", will be metric for future versions)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe 4-inch ripsaw blade shown is not included, but is sold separately. \u003c\/p\u003e\n\u003cp\u003eThis motor is intended to be mounted to a rigid robot frame component and as such does not come with a mounting plate or bracket.\u003cbr\u003e\u003cbr\u003e\u003ciframe title=\"RDY-5022 Bearing Replacement and Stator Repair Tutorial\" src=\"https:\/\/www.youtube.com\/embed\/id7gjhQeGfk\" height=\"450\" width=\"800\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003ch3\u003eSpecs and Usage\u003c\/h3\u003e\n\u003ch4\u003eSpecs\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eMotor internals and specs are identical to the existing RDY-5022\u003c\/li\u003e\n\u003cli\u003eWeighs just\u003cstrong\u003e 70.1 grams\u003c\/strong\u003e without the shoulder bolt, or 82.4g with the shoulder bolt and three spacers\u003c\/li\u003e\n\u003cli\u003eOnly 1700kV for this batch, but possibility for more later\u003c\/li\u003e\n\u003cli\u003e2024-T3 aluminum hub, 6061-T6 blue stator support\u003c\/li\u003e\n\u003cli\u003eEpoxied magnets, windings, and cable retention inside the motor\u003c\/li\u003e\n\u003cli\u003eCAD coming soon\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/youtu.be\/gii5ewsedca\" title=\"Blade install video\"\u003eVideo for blade installation here\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWarning: The outside of this motor is like a big heatsink and can get very hot!\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ch3\u003ePower and ESCs\u003c\/h3\u003e\n\u003cp class=\"\"\u003eFor best results, pair with our very own \u003ca title=\"tekko32\" href=\"https:\/\/justcuzrobotics.com\/products\/tekko32-3s-6s-am32-brushless-esc-soldered?\"\u003eTekko32 ESC\u003c\/a\u003e, AM32 firmware pre-programmed. Note this ESC is programmed singe directional out of the box, but can be switched to bidirectional using a \u003ca href=\"https:\/\/justcuzrobotics.com\/products\/usb-programmer-for-am32-blheli-blheli32-escs?_pos=1\u0026amp;_psq=usb\u0026amp;_ss=e\u0026amp;_v=1.0\"\u003eUSB Programmer\u003c\/a\u003e. \u003c\/p\u003e\n\u003cp class=\"\" data-pm-slice=\"1 1 []\"\u003eActual current draw and torque are highly dependent on your exact ESC and configuration, battery, voltage, and loading. Air resistance and tip speed for your weapon play a huge role in the current draw of your system. Even reducing speed by 20% might cut air resistance in half. \u003c\/p\u003e\n\u003cp class=\"\" data-pm-slice=\"1 1 []\"\u003eClick here for the test data spreadsheet:\u003cimg\u003e\u003ca href=\"https:\/\/docs.google.com\/spreadsheets\/d\/14f-79k2ELBbwaYbwyW3HrL5LfKw3hgTmKD1Ri45CDOU\/edit?usp=sharing\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0764\/3129\/4773\/files\/chrome_b8Gv6L74Ad.png?v=1737737488\" alt=\"\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eDisclaimer\u003c\/h3\u003e\n\u003cp\u003e\u003ca rel=\"noopener noreferrer\" href=\"https:\/\/bit.ly\/BotSafety\" target=\"_blank\"\u003eWarning: combat robots are not toys! They are extremely dangerous. Click here for a safety video.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eTesting a robot with an active spinning weapon should never be done while maintaining a line of sight with the robot. Ideally, you should be testing inside an enclosed box or arena with at least 1\/4\" thick polycarbonate windows or top to see through, and 1\/2” or thicker plywood or MDF construction. Operation (Including testing) outside of a suitable arena or test box could cause serious injury. By purchasing this product you acknowledge that you are responsible for the safe use of this product and that Team Just ‘Cuz Robotics or its employees are not liable for any injuries or damages.\u003c\/p\u003e","brand":"Just 'Cuz Robotics","offers":[{"title":"HMR-5022 1700kV","offer_id":52951341105461,"sku":"HMR-5022-1700-FAST","price":55.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0764\/3129\/4773\/files\/HRM-5022-V1-blade-1.jpg?v=1780339972","url":"https:\/\/justcuzrobotics.com\/products\/hmr-5022","provider":"Just 'Cuz Robotics","version":"1.0","type":"link"}