{"product_id":"hss-end-mill-extra-long-4-flute","title":"HSS End Mill Extra Long 4 Flute — Ø8-20mm","description":"\u003cp\u003eExtra-long 4 flute HSS end mills for milling below the surface where a standard-length cutter can't reach, available in 5 cutting diameters from Ø8mm to Ø20mm — each size listed as diameter x flute length x overall length (e.g. Ø12x100x160 is a 12mm cutter with 100mm flute length and 160mm overall). Now sold as a single listing with a size variant selector, previously listed as 5 separate products.\u003c\/p\u003e\u003ch3\u003eKey specs\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e\n\u003cstrong\u003eFlute count:\u003c\/strong\u003e 4\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eCompatibility \/ fitment\u003c\/h3\u003e\u003cp\u003eFits standard ER\/collet-type milling tool holders matching the shank diameter.\u003c\/p\u003e\u003ch3\u003eApplication \/ use case\u003c\/h3\u003e\u003cp\u003eWell suited to milling deep slots and pocket floors in jigs, fixtures, and mould bases where the workpiece geometry keeps the spindle nose well clear of the cut — the extra-long reach lets the cutter get to a depth a standard-length end mill can't. Smaller diameters (Ø8-10mm) suit finer slotting and pocketing at depth, while larger sizes (Ø16-20mm) handle heavier stock removal in deep pockets and mould bases, balancing metal removal rate with a smooth finish in mild steel and cast components — useful for general fabrication and repair machining.\u003c\/p\u003e","brand":"Forrestdale Tools","offers":[{"title":"8mm (Ø8 × 70 × 120)","offer_id":45117185818832,"sku":"HSSEM8120","price":21.82,"currency_code":"AUD","in_stock":true},{"title":"10mm (Ø10 × 80 × 135)","offer_id":45117185851600,"sku":"HSSEM10135","price":26.36,"currency_code":"AUD","in_stock":true},{"title":"12mm (Ø12 × 100 × 160)","offer_id":45117185884368,"sku":"HSSEM12160","price":31.82,"currency_code":"AUD","in_stock":true},{"title":"16mm (Ø16 × 100 × 160)","offer_id":45117185917136,"sku":"HSSEM16160","price":39.09,"currency_code":"AUD","in_stock":true},{"title":"20mm (Ø20 × 100 × 160)","offer_id":45117185949904,"sku":"HSSEM20160","price":52.73,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0659\/1876\/3216\/files\/original_06000892-ef4e-46fc-ba2d-e92d3ec53e63.jpg?v=1762843657","url":"https:\/\/forrestdaletools.com.au\/products\/hss-end-mill-extra-long-4-flute","provider":"Forrestdale Tools","version":"1.0","type":"link"}