{"product_id":"ap-astro-pneumatic-tool-company-401k-thor-0-401-long-barrel-air-hammer-3-5-8-stroke-vibration-damping-internal-brake","title":"AP Astro Pneumatic Tool Company 401K THOR 0.401\" Long‑Barrel Air Hammer — 3-5\/8\" Stroke, Vibration‑Damping Internal Brake","description":"\u003cp\u003e\u003cstrong\u003eThe Astro Tools 401K THOR is a long-barrel, 0.401\" shank air hammer built for maximum impact and controllable power in heavy automotive and industrial work.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDesigned by AP Astro Pneumatic Tool Company, the 401K THOR combines a long stroke, ported valvebody, and a vibration‑damping internal brake so you get high-performance blows without excessive operator fatigue. It ships as a bare tool (bits sold separately) and accepts a 0.401\" chisel shank, making it a go-to for stubborn rivets, seams, and demolition tasks where reliability and power matter.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the 401K THOR deliver more power than standard air hammers?\u003c\/h3\u003e\n\n\u003cp\u003eThe 401K uses a long 3-5\/8\" piston stroke and a ported valvebody tuned to maximize per-stroke impact while keeping stroke speed efficient at 2,100 BPM. That combination boosts delivered energy so the hammer competes with premium truck-stock tools.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e3-5\/8\" piston stroke for deeper impact.\u003c\/li\u003e\n  \u003cli\u003ePorted valvebody engineered for stronger blows.\u003c\/li\u003e\n  \u003cli\u003e2,100 BPM stroke rate balances force with control.\u003c\/li\u003e\n  \u003cli\u003e0.401\" chisel shank fits heavy-duty bits.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCan I control the power output for delicate versus heavy work?\u003c\/h3\u003e\n\n\u003cp\u003eYes — the THOR includes a redesigned tilt-valve trigger that provides smooth, fingertip power adjustment. The trigger lets you dial back force for lighter tasks or open it up for full-throttle demolition without swapping tools.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eTilt valve trigger for variable power modulation.\u003c\/li\u003e\n  \u003cli\u003eSensitive response enables fine control during finish work.\u003c\/li\u003e\n  \u003cli\u003eFull power available instantly for stubborn fasteners.\u003c\/li\u003e\n  \u003cli\u003eRotatable forward grip aids positioning and leverage.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat features reduce vibration and operator fatigue during long jobs?\u003c\/h3\u003e\n\n\u003cp\u003eInside the 401K THOR is an internal brake vibration-damping system that absorbs shock between blows, reducing hand and arm strain. Coupled with a rotatable forward grip and an ergonomic layout, the tool stays more comfortable through extended use.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eInternal brake system for lower vibration transfer.\u003c\/li\u003e\n  \u003cli\u003eRotatable forward grip improves comfort and control.\u003c\/li\u003e\n  \u003cli\u003eLightweight-for-power design at 5.31 lb net weight.\u003c\/li\u003e\n  \u003cli\u003eCompact 10.25\" length for tight spaces.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat air supply and accessories do I need to get the best performance?\u003c\/h3\u003e\n\n\u003cp\u003eOptimal operation is at 90 PSI using a 3\/8\" hose and Hi‑Flo fittings recommended to maintain airflow. The 401K has a 1\/4\" NPT inlet and comes with a quick‑change chuck; chisels and rivet bits must be purchased separately.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eAir inlet: 1\/4\" NPT; recommended 90 PSI operating pressure.\u003c\/li\u003e\n  \u003cli\u003eHose size: 3\/8\" to support consistent airflow.\u003c\/li\u003e\n  \u003cli\u003eHi‑Flo fittings suggested for maximum delivery.\u003c\/li\u003e\n  \u003cli\u003eIncludes quick-change chuck; bits sold separately.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The Astro Tools 401K THOR 0.401\" Long Barrel Air Hammer is built for professional mechanics, body shop technicians, and industrial maintenance crews who need a high-impact, controllable air hammer for heavy-duty riveting, cutting, and demolition tasks. If you want a compact yet powerful hammer with vibration reduction and fingertip power control, the 401K is suited for demanding daily use where tool-truck level performance is required.\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: What shank size and bits does the 401K accept?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The 401K uses a 0.401\" chisel shank; bits and rivet attachments are sold separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What air pressure and hose size are recommended?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Use about 90 PSI with a 3\/8\" hose; Hi‑Flo fittings are suggested for optimal airflow.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"AP Astro Pneumatic Tool Company","offers":[{"title":"Default Title","offer_id":48082764071070,"sku":"B01JBNJCAA","price":169.98,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/astro-401k-thor-front-profile.jpg?v=1785813536","url":"https:\/\/northtrailauto.ca\/products\/ap-astro-pneumatic-tool-company-401k-thor-0-401-long-barrel-air-hammer-3-5-8-stroke-vibration-damping-internal-brake","provider":"North Trail Auto","version":"1.0","type":"link"}