{"product_id":"weha-radial-arm-finger-tip-reverse-thread","title":"Weha Radial Arm Finger Tip — Reverse Thread (20x23xM12) | Single Head | Granite, Marble \u0026 Quartz","description":"\u003cp\u003eThe Weha Radial Arm Finger Tip (Reverse Thread, 20x23xM12) is a single-head diamond finger tip for edge profiling on granite, marble, quartz, and quartzite using radial arm machines. This is the \u003cstrong\u003ereverse thread\u003c\/strong\u003e version — required for left-hand spindles on radial arm machines where standard right-hand thread finger tips would unscrew during operation. Compatible with Fab King and similar single-head radial arm setups. Use for edge profiling, sink cutouts, and countertop edge shaping.\u003c\/p\u003e\n\n\u003ch2\u003eStandard vs. Incremental — Which Do You Need?\u003c\/h2\u003e\n\u003cp\u003eWeha offers two reverse thread finger tip options in the 20x23xM12 format:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThis product (SKU 30515RV)\u003c\/strong\u003e — Standard reverse thread finger tip for general edge profiling on granite, marble, and quartz\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/weha-incremental-quartzite-radial-arm-finger-tip-reverse-thread\"\u003e\u003cstrong\u003eIncremental Quartzite version (SKU 30517RV)\u003c\/strong\u003e\u003c\/a\u003e — Stepped segment design for harder materials like quartzite where single-pass profiling risks chipping\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eReverse Thread — Why It Matters\u003c\/h2\u003e\n\u003cp\u003eOn radial arm machines, 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. Always confirm your machine’s spindle direction before ordering.\u003c\/p\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSKU: 30515RV\u003c\/li\u003e\n\u003cli\u003eThread: Reverse M12 (left-hand)\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, edge profiling\u003c\/li\u003e\n\u003cli\u003eWeight: 0.2 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-incremental-quartzite-radial-arm-finger-tip-reverse-thread\"\u003eWeha Incremental Quartzite Radial Arm Finger Tip (Reverse Thread) — For quartzite and hard stone\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":51164338553056,"sku":"30515RV","price":77.73,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0786\/3943\/1904\/files\/30515Finger.jpg?v=1774356631","url":"https:\/\/protoolhaus.com\/products\/weha-radial-arm-finger-tip-reverse-thread","provider":"Pro Tool Haus","version":"1.0","type":"link"}