{"product_id":"flex-hone-4-1-2ft-240-grit-silicon-carbide-precision-crosshatch","title":"FLEX-HONE 4-1\/2ft 240 Grit Silicon Carbide - Precision Crosshatch","description":"\u003cp\u003eIn this review of the FLEX-HONE 4-1\/2' 240 grit silicon carbide abrasive brush, the bottom line is simple: this tool is for technicians and home engine rebuilders who need a reliable, repeatable crosshatch finish and gentle material removal. The reviewer found the oversized, self-centering design makes setup quick and forgiving, while the 240 grit silicon carbide abrasive produces a consistent plateau finish suitable for mild steel, stainless steel and cast iron. If you want a single, easy-to-use hone that deburrs crossholes and leaves an oil-retaining surface, this tool delivers.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuality Made in USA:\u003c\/strong\u003e Built by the original makers of the tool, the hone offers consistent construction and reliability for repeated engine and cylinder work.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOversized Self-Centering Design:\u003c\/strong\u003e The engineered oversize keeps the tool self-aligning and self-compensating for wear, which simplifies use in a hand drill or drill press.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e240 Grit Silicon Carbide:\u003c\/strong\u003e The abrasive is suited for mild steel, stainless steel and cast iron and typically yields a 24-32 microinch plateau finish for good oil retention.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinishing and Deburring in One Step:\u003c\/strong\u003e The flexible abrasive beads finish bore walls and remove burrs at crossholes in a single setup, saving time on rebuilds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide Applicability:\u003c\/strong\u003e Works for hydraulic and pneumatic cylinders, engine and brake cylinders, valve guides, pumps and compressors where a crosshatch finish is required.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis tool is aimed at machine shop techs, engine rebuilders and DIY mechanics who rebuild hydraulic or engine cylinders and want a repeatable plateau finish without complex setups. It is especially useful where crosshole deburring and a controlled finish are required in one pass.\u003c\/p\u003e\n\u003cp\u003eThose who should look elsewhere include users who need very fine mirror polishing (this hone produces a plateau, not a mirror finish) or work exclusively on very hard, nonferrous alloys where silicon carbide abrasive and the flexible bead design are not ideal.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eProduces a consistent crosshatch plateau finish that improves oil retention and sealing.\u003c\/li\u003e\n\u003cli\u003eSelf-centering, oversized design makes it easy to use with a hand drill or drill press without chattering.\u003c\/li\u003e\n\u003cli\u003eDurable construction and predictable performance from a US-made tool, giving good value for rebuild work.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNot intended for mirror polishing or extremely hard exotic alloys where different abrasives are preferable.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eFlex-Hone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e4-1\/2' (114mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAbrasive\u003c\/td\u003e\n\u003ctd\u003e240 grit silicon carbide\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIntended Materials\u003c\/td\u003e\n\u003ctd\u003eMild steel, stainless steel, cast iron and softer ferrous materials\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUseable Bore Range\u003c\/td\u003e\n\u003ctd\u003e4.251' - 4.500'\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShank \/ Overall Length\u003c\/td\u003e\n\u003ctd\u003e0.310' shank, 13.5' overall length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAbrasive Length\u003c\/td\u003e\n\u003ctd\u003e6' abrasive part length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe FLEX-HONE 4-1\/2' 240 grit is a practical, well-built hone for anyone rebuilding cylinders who needs a reliable crosshatch plateau finish and integrated deburring. It is good value for rebuilds and shop use thanks to its self-centering design and appropriate abrasive choice, making it a recommended pick for most ferrous cylinder work.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWill this hone work on stainless steel?\u003c\/strong\u003e\u003cbr\u003eYes, the 240 grit silicon carbide abrasive is suitable for stainless steel and other softer ferrous materials.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat bore sizes will this tool service?\u003c\/strong\u003e\u003cbr\u003eThis 4-1\/2' unit is intended for bores between 4.251' and 4.500' and should be ordered by bore size for best results.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan it be used in a hand drill or CNC spindle?\u003c\/strong\u003e\u003cbr\u003eYes, the flexible hone is designed for use in a hand drill, drill press or virtually any rotating spindle and will perform finishing and deburring in a single setup.\u003c\/p\u003e","brand":"Flex-Hone","offers":[{"title":"Default Title","offer_id":48205002408155,"sku":"B002XUL1N0","price":103.85,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/81krduQeadL._SL1500_95ede966-0a52-4806-b4a5-4b16cb7fb841.jpg?v=1770292473","url":"https:\/\/gearmusthave.com\/products\/flex-hone-4-1-2ft-240-grit-silicon-carbide-precision-crosshatch","provider":"GearMustHave","version":"1.0","type":"link"}