{"product_id":"dayuan-pneumatic-cv-boot-expander-tool-20-115mm-air-driven-installer-1-4-bsp-professional","title":"DAYUAN Pneumatic CV Boot Expander Tool — 20–115mm Air-Driven Installer, 1\/4\" BSP, Professional","description":"\u003cstrong\u003eDAYUAN's pneumatic CV joint boot expander is an air-driven installation and removal tool that safely stretches flexible rubber CV and steering boots onto drive shafts ranging from 20 to 115 mm.\u003c\/strong\u003e\n\n\u003cp\u003eThis professional-grade tool speeds up CV boot installation by using compressed air to expand a set of fingers, allowing a lubricated rubber boot to slip over a joint without tearing or excessive manual force. Built for workshops and experienced DIYers, the DAYUAN expander is designed to work only with pliable rubber boots (not rigid PVC) and connects via a 1\/4\" BSP thread to standard air systems. Follow pressure limits and lubrication instructions to ensure smooth operation and long tool life.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the DAYUAN air expander protect CV boots during installation?\u003c\/h3\u003e\n\u003cp\u003eThe tool expands evenly to open the boot’s small mouth so the boot slides over the flange with minimal stress. That reduces pinching and stretching at the bead, lowering the risk of tears compared with manual prying.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eEven radial expansion avoids local overstretching.\u003c\/li\u003e\n  \u003cli\u003eWorks on boots with 20–115 mm diameters for broad compatibility.\u003c\/li\u003e\n  \u003cli\u003eUse lubricant on the bead for smoother seating and less friction.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat air setup and safety steps are required to use this tool?\u003c\/h3\u003e\n\u003cp\u003eConnect the expander to an air supply using a 1\/4\" BSP fitting and keep pressure at or below 110 psi. If your compressor can exceed that, install a pressure regulator; disconnect the tool from air when idle.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eThreaded body accepts standard 1\/4\" BSP air connectors.\u003c\/li\u003e\n  \u003cli\u003eMaximum recommended pressure: 110 psi; use a regulator if necessary.\u003c\/li\u003e\n  \u003cli\u003eDisconnect air hose after each use to prevent accidental expansion.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich boots are compatible and which should you avoid?\u003c\/h3\u003e\n\u003cp\u003eThe DAYUAN expander is intended for flexible rubber CV and steering boots. It is not suitable for rigid plastics or very stiff boots that cannot be manually opened enough to slip over the expander fingers.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible: flexible rubber CV and steering boots.\u003c\/li\u003e\n  \u003cli\u003eNot compatible: PVC or hard\/plastic boots and extremely stiff materials.\u003c\/li\u003e\n  \u003cli\u003eCheck boot pliability by hand before attempting installation with the tool.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat is the step-by-step process for installing a boot with this tool?\u003c\/h3\u003e\n\u003cp\u003eLubricate the boot bead, place the boot over the collapsed expander fingers, then actuate the air valve to expand. Slide the boot into position and release the valve to deflate the expander; remove the tool and fit clamps or bands.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eApply suitable assembly lubricant to the boot bead.\u003c\/li\u003e\n  \u003cli\u003ePosition boot over expander, then expand with compressed air.\u003c\/li\u003e\n  \u003cli\u003eSlide boot into place, release air, and remove tool before clamping.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this is for: The DAYUAN pneumatic CV joint boot expander suits professional mechanics, automotive repair shops, and skilled hobbyists who frequently replace CV or steering boots. It speeds repeat work, reduces installation damage, and is ideal where consistent, controlled expansion is preferred over manual stretching. Note: If a boot is too stiff to open even slightly by hand, choose a different installation method or a boot material suited to this tool.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can this tool be used with plastic (PVC) CV boots?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. The DAYUAN expander is designed for flexible rubber boots; rigid PVC or hard plastic boots are not suitable.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What is the maximum air pressure I should use?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Do not exceed 110 psi. Fit a regulator if your compressor can deliver higher pressure.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"DAYUAN","offers":[{"title":"Default Title","offer_id":48084131709086,"sku":"B0BZNZRDGJ","price":78.43,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/dayuan-front-view-tool.jpg?v=1785847092","url":"https:\/\/northtrailauto.ca\/products\/dayuan-pneumatic-cv-boot-expander-tool-20-115mm-air-driven-installer-1-4-bsp-professional","provider":"North Trail Auto","version":"1.0","type":"link"}