{"product_id":"taps-t47","title":"Taps T47","description":"\u003cp\u003eT47 is the newest threaded BB standard in wide use. Chris King helped develop the spec: a 47 mm thread diameter, 1.0 mm pitch, right-hand on the non-drive side and left-hand on the drive side. Trek adopted it as T47i (internal bearing) on a generation of high-end road and gravel bikes, and an asymmetric variant, T47a, uses a different cup arrangement again. The standard solves two problems at once: wider shell for larger spindle diameters, and threaded engagement so it can't develop the creak of a press-fit shell. The Taps T47 chase the M47×1 threads in those shells the same way the 1697 and 1698 chase BSA and Italian threads in their respective shells.\u003c\/p\u003e\n\u003ch2\u003eWhat the tool does\u003c\/h2\u003e\n\u003cp\u003eThe taps are a matched pair: a right-hand tap for the non-drive side, a left-hand tap for the drive side. Run them through the shell threads after the frame comes back from paint, after a frame swap, or any time you want to confirm the threads are clean enough to torque a cup into without binding. The tap doesn't cut new threads in unthreaded material; it chases existing threads, removing paint film, anodize buildup, and minor thread damage.\u003c\/p\u003e\n\u003cp\u003eThe taps are compatible with Unior's existing BB tap holders: the 1697 BSA-pattern handle and the 1698 Italian-pattern handle. Same modular frame-prep series as the BB Facing Tool 1699 and the Head Tube Reamer 1694; one handle drives the whole kit.\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eT47 shells (M47 × 1.0 mm thread)\u003c\/li\u003e\n\u003cli\u003eAll current T47 metal shells (Trek T47i, T47a, Chris King T47 cups)\u003c\/li\u003e\n\u003cli\u003eCarbon T47 shells with metal threaded inserts\u003c\/li\u003e\n\u003cli\u003ePair with Unior tap holders 1697 (BSA-pattern handle) and 1698 (Italian-pattern handle)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecs\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eThread: M47 × 1 (LH \/ RH); article 1695.5; pair weight 267 g\u003c\/li\u003e\n\u003cli\u003ePair: one right-hand tap (non-drive), one left-hand tap (drive)\u003c\/li\u003e\n\u003cli\u003eMaterial: durable tool steel for long service life\u003c\/li\u003e\n\u003cli\u003eCompatible with Unior 1697 and 1698 bottom-bracket tapping tools\u003c\/li\u003e\n\u003cli\u003eMade in Slovenia by Unior\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eIncludes:\u003c\/strong\u003e Right-hand tap, left-hand tap. Tap holder (1697 or 1698) sold separately.\u003c\/p\u003e\n\u003ch2\u003eMade in Slovenia, since 1919\u003c\/h2\u003e\n\u003cp\u003eUnior has been forging hand tools in Zreče since 1919, and sponsors professional road and mountain-bike race teams. T47 is a younger standard than most of the BB shells the Unior catalog services; the T47 taps are the catalog's response to Chris King's standard becoming a real production fitment. The shared-handle decision means a shop adding T47 service to its bench doesn't add another full toolkit; it adds two taps.\u003c\/p\u003e\n\u003ch2\u003ePro tip from our mechanics\u003c\/h2\u003e\n\u003cp\u003eAlways use cutting oil. The thread is finer than BSA's 24 TPI, and a dry tap on T47 threads will gall and lift small chips into the shell, which then bind the cup install. A drop of cutting oil on each tap before it enters the shell is the cheap insurance.\u003c\/p\u003e\n\u003cp\u003eIf you're chasing T47 threads on a frame coming back from paint, run the tap until the thread cuts cleanly; meaning the swarf coming off is a smooth ribbon, not chunks. Stop, reverse a quarter-turn to break the chip, then continue. Force always produces worse results than patience here.\u003c\/p\u003e\n\u003cp\u003eThe BSA-shell walk-through (chasing threads, facing the shell, feed control) is the T47 cousin in our Tech Tips library; same procedure, different thread spec: Frame prep: threaded bottom bracket shells →\u003c\/p\u003e\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eDoes article 1695.5 cut new T47 threads or only restore existing ones?\u003c\/strong\u003e Unior designed these taps for chasing and restoring existing T47 threads, and for cleaning and restoring existing threads in T47 bottom-bracket shells. A chase will not cut a new thread in unthreaded material and will not rebuild a stripped shell.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhich bottom-bracket shells do the T47 taps fit?\u003c\/strong\u003e All T47 metal bottom-bracket shells. The pair is precision-machined M47 × 1, with left-hand and right-hand taps included. Official table: M47x1 - LH \/ RH (T47). BSA shells take the 1697.1 taps; Italian-threaded shells take the 1698.1 taps.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat else do I need besides this pair to chase a T47 shell?\u003c\/strong\u003e These are the two taps only. Unior lists them as compatible with current and previous generations of Unior bottom-bracket tapping tools 1697 and 1698, which are sold separately. Always use cutting oil.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow are the left-hand and right-hand T47 taps marked?\u003c\/strong\u003e Each tap is engraved M47x1-LH or M47x1-RH, plus T47 and article 1695.5. Official Unior copy does not assign those marks to the drive or non-drive side of the bike; match the engraving to the cup thread you are chasing.\u003c\/p\u003e","brand":"Unior USA B2B","offers":[{"title":"Default Title","offer_id":47424439648492,"sku":"629771","price":131.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0464\/7708\/2777\/files\/1695.5_629771_image_1024.jpg?v=1787174027","url":"https:\/\/b2b.uniorusa.com\/products\/taps-t47","provider":"Unior USA B2B","version":"1.0","type":"link"}