{"product_id":"knightsbridge-hss-pilot-drill-bits-6-35mm-x-75mm-pack-of-5","title":"Knightsbridge HSS Pilot Drill Bits 6.35mm x 75mm - Pack of 5","description":"\u003ch5\u003eDescription\u003c\/h5\u003e\n\u003cp\u003eThese Knightsbridge pilot drill bits measure 6.35mm diameter by 75mm length and are supplied in a pack of five. Made from high-speed steel with a stainless finish, they fit all Knightsbridge holesaw arbors and provide the centre pilot hole needed when cutting larger diameter holes with a holesaw attachment.\u003c\/p\u003e\n\u003cp\u003eUsed in carpentry, joinery, electrical installation and plumbing, pilot drill bits stabilise the holesaw during cutting and prevent the saw from wandering across the material surface. The 6.35mm diameter is the standard pilot size for most holesaw arbors in the 14-127mm holesaw range, making this pack a direct replacement for worn or damaged pilot bits.\u003c\/p\u003e\n\u003cp\u003eThe 75mm length provides enough reach to cut through typical wall thicknesses, cabinet panels and door frames without the shank bottoming out before the holesaw completes the cut. The stainless finish resists corrosion when stored in damp site conditions or tool bags, extending bit life between replacements. Supplied as a pack of five, the set allows multiple pilot holes to be drilled before changing bits or provides spares when one becomes blunt.\u003c\/p\u003e\n\n\u003ch5\u003eSpecification\u003c\/h5\u003e\n\u003ctable class=\"spec_table\"\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e6.35 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e75 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\u003eStainless Steel\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\n\u003ch5\u003eDownloads\u003c\/h5\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0729\/8993\/3835\/files\/products_1474310_datasheet.pdf\" target=\"_blank\"\u003eProduct Specification Sheet\u003c\/a\u003e\u003c\/p\u003e\n\n\u003ch5\u003eFrequently Asked\u003c\/h5\u003e\n\u003cp\u003e\u003cstrong\u003eAre these compatible with other brands of holesaw arbors?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 6.35mm diameter is a standard pilot bit size used across most UK and European holesaw arbor systems, so these bits typically fit arbors from other manufacturers. However, compatibility depends on the specific arbor design — check the arbor's pilot bit diameter specification before ordering.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow long do the bits last before needing replacement?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003ePilot bit lifespan depends on material hardness and drilling frequency. In softwood and plasterboard, a single bit may last 50-100 holes. In harder materials like hardwood, MDF or mild steel, expect 10-30 holes per bit. Blunt bits cause the holesaw to wander and produce rough cuts, indicating replacement is needed.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan these be resharpened?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eHigh-speed steel pilot bits can be resharpened with a bench grinder or drill bit sharpener, but the small 6.35mm diameter makes hand-sharpening difficult without specialised tooling. Most tradespeople replace rather than resharpen at this diameter due to the low cost per bit when purchased in packs.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat speed should the drill be set to?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003ePilot bits work best at moderate drill speeds — typically 800-1200 RPM for wood, 400-600 RPM for metal. High speeds overheat the bit and reduce cutting life, while very low speeds can cause the bit to grab and stall in harder materials.\u003c\/p\u003e","brand":"Knightsbridge","offers":[{"title":"Default Title","offer_id":45293888602379,"sku":"HSPILOTDB5","price":10.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/8993\/3835\/files\/109248_8dcff174-2280-4494-91f4-9ae04501ca3b.jpg?v=1714665568","url":"https:\/\/niori.co.uk\/products\/knightsbridge-hss-pilot-drill-bits-6-35mm-x-75mm-pack-of-5","provider":"Niori","version":"1.0","type":"link"}