{"product_id":"knightsbridge-90mm-bi-metal-holesaw-38mm-cutting-depth","title":"Knightsbridge 90mm Bi-Metal Holesaw - 38mm Cutting Depth","description":"\u003ch5\u003eDescription\u003c\/h5\u003e\n\u003cp\u003eThe Knightsbridge 90mm bi-metal holesaw features a 90mm outer diameter cutting edge with 4\/6 TPI variable bi-metal teeth, providing a 38mm maximum cutting depth. The variable tooth pitch alternates between coarse and fine teeth around the cutting edge, reducing vibration and extending blade life when cutting through dense materials like stainless steel or hardwood flooring.\u003c\/p\u003e\n\u003cp\u003eDesigned for installing downlights, exhaust fans, ducting and electrical back boxes, the 90mm diameter suits products requiring a 90mm cut-out, including several Knightsbridge LED downlight models (LEDM08, MD03 series, ME04 series, SK005, SK006). The holesaw requires arbor HSARBORL (sold separately) to mount onto a drill chuck. The bi-metal construction combines a high-speed steel cutting edge welded onto a spring steel body, allowing the saw to flex under load without cracking when cutting metal or hitting knots in timber.\u003c\/p\u003e\n\u003cp\u003eThe 38mm cutting depth handles standard plasterboard-and-stud walls, solid timber joists up to 38mm thick, plywood sheeting and metal panels within the depth limit. The yellow powder-coated finish resists corrosion and makes the saw visible in toolboxes. Suitable materials include mild steel, stainless steel, die-cast aluminium and zinc alloys, hardwood and engineered timber floors, plywood and ABS or PVC plastics.\u003c\/p\u003e\n\u003ch5\u003eSpecification\u003c\/h5\u003e\n\u003ctable class=\"spec_table\"\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e90 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecessed Depth\u003c\/td\u003e\n\u003ctd\u003e38 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCut-out Diameter\u003c\/td\u003e\n\u003ctd\u003e90 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eSteel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003eYellow\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch5\u003eDownloads\u003c\/h5\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0729\/8993\/3835\/files\/products_1474300_datasheet.pdf\" target=\"_blank\"\u003eProduct Specification Sheet\u003c\/a\u003e\u003c\/p\u003e\n\u003ch5\u003eFrequently Asked\u003c\/h5\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this holesaw include the arbor?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. The arbor (mandrel) is sold separately. This holesaw requires Knightsbridge arbor HSARBORL to mount onto a drill chuck.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat materials can it cut?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe bi-metal construction cuts mild steel, stainless steel, die-cast metals (aluminium, zinc alloys), hardwood and engineered timber flooring, plywood and plastics including ABS and PVC. Maximum cutting depth is 38mm.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat TPI does it have?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe holesaw uses 4\/6 TPI variable teeth, meaning the tooth pitch alternates between 4 teeth per inch and 6 teeth per inch around the cutting edge. This reduces vibration and heat build-up when cutting dense materials.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhich Knightsbridge downlights need a 90mm cut-out?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis 90mm holesaw suits Knightsbridge models LEDM08, MD03B, MD03W, MD03C, ME04B, ME04C, ME04W, SK005 and SK006. Check the product specification sheet for the exact cut-out diameter before drilling.\u003c\/p\u003e","brand":"Knightsbridge","offers":[{"title":"Default Title","offer_id":45293888209163,"sku":"HS90MM","price":14.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/8993\/3835\/files\/1428938_bb9510fe-52dc-4053-9d12-1bb149eca7d1.jpg?v=1714665560","url":"https:\/\/niori.co.uk\/products\/knightsbridge-90mm-bi-metal-holesaw-38mm-cutting-depth","provider":"Niori","version":"1.0","type":"link"}