{"product_id":"weha-incremental-quartzite-radial-arm-finger-tip-reverse-thread","title":"Weha Incremental Quartzite Radial Arm Finger Tip — Reverse Thread (20x23xM12) | Single Head | Granite, Marble \u0026 Quartz","description":"\u003cp\u003eThe Weha Incremental Quartzite Radial Arm Finger Tip is a single-head diamond finger tip engineered for incremental edge profiling on quartzite, granite, marble, and quartz using radial arm machines. This is the \u003cstrong\u003ereverse thread\u003c\/strong\u003e version (20x23xM12, color-coded red) — designed for use on the left-hand spindle of radial arm machines where standard right-hand thread finger tips would loosen during operation. Compatible with Fab King and similar single-head radial arm setups.\u003c\/p\u003e\n\n\u003ch2\u003eReverse Thread — Why It Matters\u003c\/h2\u003e\n\u003cp\u003eOn radial arm machines, the spindle rotation direction determines whether a standard or reverse thread finger tip is required. Using the wrong thread direction causes the finger tip to unscrew during operation — a safety hazard and source of tool damage. The red color coding on this finger tip identifies it as reverse thread at a glance, preventing mix-ups in a busy shop environment.\u003c\/p\u003e\n\n\u003ch2\u003eIncremental Profile Design\u003c\/h2\u003e\n\u003cp\u003eThe incremental design uses stepped diamond segments that progressively shape the edge profile in controlled passes, rather than removing material all at once. This is particularly effective on quartzite and hard engineered stone where aggressive single-pass profiling risks chipping or micro-fracturing the edge.\u003c\/p\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSKU: 30517RV\u003c\/li\u003e\n\u003cli\u003eThread: Reverse (M12), 20x23mm\u003c\/li\u003e\n\u003cli\u003eColor code: Red (reverse thread)\u003c\/li\u003e\n\u003cli\u003eHead type: Single head\u003c\/li\u003e\n\u003cli\u003eCompatible machines: Fab King, radial arm machines with M12 spindle\u003c\/li\u003e\n\u003cli\u003eApplications: Granite, marble, quartz, quartzite, sink cutouts\u003c\/li\u003e\n\u003cli\u003eWeight: 0.5 lb\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWorks Well With\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/weha-radial-arm-finger-tip\"\u003eWeha Radial Arm Finger Tip (20x23xM12) — Standard thread version for right-hand spindles\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/weha-radial-arm-finger-tip-reverse-thread\"\u003eWeha Radial Arm Finger Tip Reverse Thread (20x23xM12) — Standard reverse thread finger tip\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/weha-radial-arm-adapter-1-2-gas-for-incremental-finger-tip\"\u003eWeha Radial Arm Finger Tip (1\/2 Gas x 12mm) — Alternative thread adapter\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/weha-vacuum-brazed-zero-tolerance-wheel-no-bearing\"\u003eWeha Vacuum Brazed Zero Tolerance Wheel — Profile wheel for radial arm use\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/weha-rock-dog-router-single-speed-with-aquaplaning-base\"\u003eWeha Rock Dog Router — Stone profiling machine\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFurther Reading\u003c\/h2\u003e\n\u003cp\u003e\u003ca href=\"\/blogs\/news\/weha-finger-bit-buying-guide-cnc-radial-arm\"\u003eWhich Weha Finger Bit Do You Need? CNC vs Radial Arm — Complete Buying Guide →\u003c\/a\u003e — Full comparison of all Weha finger bits and finger tips by machine type, material, and application.\u003c\/p\u003e","brand":"Weha","offers":[{"title":"Default Title","offer_id":51164338520288,"sku":"30517RV","price":80.02,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0786\/3943\/1904\/files\/30515RV.png?v=1774356627","url":"https:\/\/protoolhaus.com\/products\/weha-incremental-quartzite-radial-arm-finger-tip-reverse-thread","provider":"Pro Tool Haus","version":"1.0","type":"link"}