{"product_id":"cnc-spindle-speed-control-bundle","title":"CNC Spindle Speed Control Bundle","description":"\u003cdiv style=\"font-family: Arial, sans-serif; line-height: 1.6; color: #222;\"\u003e\n\n  \u003ch2 style=\"font-size: 24px; margin-bottom: 10px;\"\u003eCNC Spindle Speed Control Bundle\u003c\/h2\u003e\n\n  \u003cp style=\"font-size: 16px; margin-bottom: 18px;\"\u003e\n    The \u003cstrong\u003eCNC Spindle Speed Control Bundle\u003c\/strong\u003e is built for CNC users who want to control spindle speed and switch an accessory circuit from their CNC control system. This bundle pairs the \u003cstrong\u003eC41S-PWM Spindle Speed Control Board\u003c\/strong\u003e with the \u003cstrong\u003eC37 Single Relay Board\u003c\/strong\u003e, giving you a practical setup for VFD spindle control, spindle enable wiring, coolant control, contactor triggering, or other CNC accessory switching.\n  \u003c\/p\u003e\n\n  \u003cp style=\"font-size: 16px; margin-bottom: 18px;\"\u003e\n    This is a cleaner option than buying parts separately and trying to figure out later what else is needed. The C41S-PWM handles the spindle speed signal, while the C37 gives you a dedicated relay output for switching one compatible AC or DC device.\n  \u003c\/p\u003e\n\n  \u003cdiv style=\"background: #f6f6f6; border-left: 4px solid #333; padding: 15px 18px; margin: 22px 0;\"\u003e\n    \u003cstrong\u003eBest for:\u003c\/strong\u003e CNC routers, CNC mills, VFD spindle setups, spindle enable circuits, coolant pump control, contactor triggering, and CNC control box upgrades.\n  \u003c\/div\u003e\n\n  \u003ch3 style=\"font-size: 20px; margin-top: 28px;\"\u003eWhat’s Included\u003c\/h3\u003e\n\n  \u003cul style=\"padding-left: 22px; margin-bottom: 22px;\"\u003e\n    \u003cli\u003e\n      \u003cstrong\u003eC41S-PWM Spindle Speed Control Board\u003c\/strong\u003e\u003cbr\u003e\n      Converts a PWM signal into a \u003cstrong\u003e0–10V analog output\u003c\/strong\u003e for compatible VFD and spindle speed control.\n      \u003cbr\u003e\n      \u003ca href=\"\/de\/products\/c41s-pwm-spindle-speed-control-board-with-0-10v-analog-output\" style=\"color: #0056b3; text-decoration: underline;\"\u003eView full C41S-PWM specs\u003c\/a\u003e\n    \u003c\/li\u003e\n\n    \u003cli style=\"margin-top: 14px;\"\u003e\n      \u003cstrong\u003eC37 Single Relay Board\u003c\/strong\u003e\u003cbr\u003e\n      Provides one relay output for switching a spindle enable circuit, coolant pump, contactor, valve, or other compatible CNC accessory.\n      \u003cbr\u003e\n      \u003ca href=\"\/de\/products\/c37-single-relay-board-for-cnc-accessory-control\" style=\"color: #0056b3; text-decoration: underline;\"\u003eView full C37 relay board specs\u003c\/a\u003e\n    \u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3 style=\"font-size: 20px; margin-top: 28px;\"\u003eWhy Buy This Bundle?\u003c\/h3\u003e\n\n  \u003cul style=\"padding-left: 22px; margin-bottom: 22px;\"\u003e\n    \u003cli\u003e\n      \u003cstrong\u003eControl spindle speed from your CNC system:\u003c\/strong\u003e\n      The C41S-PWM outputs the 0–10V analog signal used by many compatible VFDs for external spindle speed control.\n    \u003c\/li\u003e\n    \u003cli\u003e\n      \u003cstrong\u003eAdd a dedicated relay output:\u003c\/strong\u003e\n      The C37 gives you one relay-controlled output for spindle enable, coolant, contactor triggering, solenoids, or another compatible accessory.\n    \u003c\/li\u003e\n    \u003cli\u003e\n      \u003cstrong\u003eCleaner control box layout:\u003c\/strong\u003e\n      These boards help organize spindle and accessory control inside your CNC cabinet instead of leaving the wiring scattered across separate components.\n    \u003c\/li\u003e\n    \u003cli\u003e\n      \u003cstrong\u003eBetter than guessing parts individually:\u003c\/strong\u003e\n      Many CNC builders realize they need both speed control and relay switching. This bundle gives you both together.\n    \u003c\/li\u003e\n    \u003cli\u003e\n      \u003cstrong\u003eUseful for VFD-based spindle setups:\u003c\/strong\u003e\n      If your VFD supports external 0–10V analog speed control, this bundle gives you a strong starting point for CNC-controlled spindle operation.\n    \u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3 style=\"font-size: 20px; margin-top: 28px;\"\u003eCommon Uses\u003c\/h3\u003e\n\n  \u003cul style=\"padding-left: 22px; margin-bottom: 22px;\"\u003e\n    \u003cli\u003eVFD spindle speed control\u003c\/li\u003e\n    \u003cli\u003eCNC-controlled spindle on\/off or enable wiring\u003c\/li\u003e\n    \u003cli\u003eCoolant pump switching\u003c\/li\u003e\n    \u003cli\u003eContactor triggering for larger spindle systems\u003c\/li\u003e\n    \u003cli\u003eSolenoid or electro-valve control\u003c\/li\u003e\n    \u003cli\u003eCNC router or CNC mill control box upgrades\u003c\/li\u003e\n    \u003cli\u003eReplacing manual spindle speed adjustment with CNC-controlled speed output\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3 style=\"font-size: 20px; margin-top: 28px;\"\u003eSimple Explanation\u003c\/h3\u003e\n\n  \u003cp style=\"font-size: 16px; margin-bottom: 18px;\"\u003e\n    The \u003cstrong\u003eC41S-PWM\u003c\/strong\u003e helps your CNC controller send a speed command to a compatible VFD or spindle drive. The \u003cstrong\u003eC37\u003c\/strong\u003e acts like a CNC-controlled switch for one external device. Together, they help you build a cleaner spindle-control section inside your CNC control box.\n  \u003c\/p\u003e\n\n  \u003cp style=\"font-size: 16px; margin-bottom: 18px;\"\u003e\n    This bundle is best for customers who want spindle speed control plus one relay-controlled output without having to piece the parts together separately.\n  \u003c\/p\u003e\n\n  \u003ch3 style=\"font-size: 20px; margin-top: 28px;\"\u003eImportant Compatibility Notes\u003c\/h3\u003e\n\n  \u003cul style=\"padding-left: 22px; margin-bottom: 22px;\"\u003e\n    \u003cli\u003eThe C41S-PWM is \u003cstrong\u003enot a VFD\u003c\/strong\u003e and is \u003cstrong\u003enot a spindle drive\u003c\/strong\u003e.\u003c\/li\u003e\n    \u003cli\u003eYour VFD or motor controller must support external \u003cstrong\u003e0–10V analog speed control\u003c\/strong\u003e.\u003c\/li\u003e\n    \u003cli\u003eYour CNC controller must provide the required PWM\/control signal.\u003c\/li\u003e\n    \u003cli\u003eThe C37 relay board must be matched to the voltage and current requirements of the device you plan to switch.\u003c\/li\u003e\n    \u003cli\u003eFor larger motors, pumps, or high-current devices, use the relay to trigger a properly rated contactor instead of switching the load directly.\u003c\/li\u003e\n    \u003cli\u003eAlways verify your controller, VFD, relay load, wiring, and software settings before connecting power.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003cdiv style=\"background: #fff8e5; border: 1px solid #e0c878; padding: 15px 18px; margin-top: 24px;\"\u003e\n    \u003cstrong\u003eNeed help confirming compatibility?\u003c\/strong\u003e\n    \u003cp style=\"margin: 8px 0 0 0;\"\u003e\n      If you are not sure whether this bundle is right for your CNC spindle, VFD, or control box, contact us before ordering. We can help you check your controller output, VFD input requirements, and relay-control needs.\n    \u003c\/p\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"BuildYourCNC","offers":[{"title":"Default Title","offer_id":47835021705390,"sku":null,"price":56.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0664\/7516\/3822\/files\/e64b69c5-b433-4a65-bfe0-90f4ab03604e_35b94c7f-1cde-4036-847d-df41bb1ba96d.jpg?v=1778288451","url":"https:\/\/buildyourcnc.com\/de\/products\/cnc-spindle-speed-control-bundle","provider":"BuildYourCNC","version":"1.0","type":"link"}