{"product_id":"wiseman-hss-ba-split-dies-british-association-right-hand-thread","title":"Wiseman HSS BA Split Dies – British Association Right Hand Thread","description":"\u003cp data-pm-slice=\"1 3 []\" style=\"text-align: center;\"\u003e\u003cspan\u003eWiseman HSS BA Split Dies are manufactured from High Speed Steel (HSS) and designed for cutting new external BA (British Association) threads, as well as repairing, cleaning and restoring damaged or worn existing threads.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003eThese round split dies feature an adjustable design, allowing minor adjustments to the thread fit when used with a suitable die stock. They are particularly useful for precision engineering, instrument making, model engineering, electrical equipment maintenance and restoration applications.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003eBritish Association threads feature a distinctive \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e47.5° thread profile\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e with rounded crests and roots. Unlike conventional metric or imperial thread series, BA threads are identified by numbered sizes, with larger BA numbers representing smaller thread diameters.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003eBA threads were widely used in electrical equipment, scientific instruments, model engineering, small machinery and precision mechanical assemblies. They remain particularly relevant for maintaining and restoring older British equipment and components.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003eDesigned for right-hand thread cutting, these split dies are suitable for producing and restoring BA threads on screws, studs, rods and other externally threaded components.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 style=\"text-align: center;\"\u003e\u003cspan\u003eKey Features\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul data-spread=\"false\" style=\"text-align: center;\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eHigh Speed Steel (HSS)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Durable construction for reliable thread cutting and maintenance.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eBA Thread Form\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Designed for British Association external threads.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eRight Hand Thread\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Standard clockwise tightening thread direction.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eAdjustable Split Design\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Allows minor adjustment of the thread fit when used with a suitable die stock.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eRound Die Construction\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Designed for use with compatible die stocks and die holders.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e47.5° Thread Profile\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – British Association thread form with rounded crests and roots.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eNumbered Thread Sizes\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – BA sizes are designated by numbers rather than nominal inch diameters.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eThread Cutting \u0026amp; Restoration\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Suitable for cutting new external threads and repairing existing threads.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003ePrecision Engineering Applications\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Particularly useful for small threaded components and specialist restoration work.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"text-align: center;\"\u003e\u003cspan\u003eApplications\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003eSuitable for:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul data-spread=\"false\" style=\"text-align: center;\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eCutting new BA external threads on screws, rods and studs.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eRepairing damaged or worn British Association threads.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eCleaning and restoring existing external threads.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eModel engineering and miniature machinery.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eElectrical equipment and instrument repairs.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eScientific instrument manufacturing and maintenance.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eVintage machinery and equipment restoration.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003ePrecision engineering and workshop machining.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eManufacturing replacement screws and specialist threaded components.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"text-align: center;\"\u003e\u003cspan\u003eRecommended Use\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003eSelect the correct BA split die size to match the required external thread. Each BA size has its own specified major diameter and thread pitch.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003eSecure the die in a compatible die stock or holder, ensuring the adjustment screws are correctly positioned. Prepare the workpiece to the appropriate diameter and apply a suitable chamfer to help the die start squarely.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003eApply a suitable cutting lubricant and rotate the die clockwise to cut the thread. Periodically reverse the die slightly to break and clear chips where appropriate for the material and cutting conditions.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003eThe adjustable split design allows minor adjustments to the thread fit. For accurate results, check the finished thread using a suitable BA thread gauge or correctly specified mating component.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003eExtra care should be taken when cutting smaller BA thread sizes due to the reduced diameter and increased risk of damaging delicate workpieces.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 style=\"text-align: center;\"\u003e\u003cspan\u003eImportant\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli style=\"text-align: center;\"\u003e\n\u003cp\u003e\u003cspan\u003eSuitable for BA (British Association) right-hand external threads only.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli style=\"text-align: center;\"\u003e\n\u003cp\u003e\u003cspan\u003eFeatures a \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e47.5° thread profile\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e with rounded crests and roots.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli style=\"text-align: center;\"\u003e\n\u003cp\u003e\u003cspan\u003eBA thread sizes are numbered, with higher numbers representing smaller nominal diameters.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli style=\"text-align: center;\"\u003e\n\u003cp\u003e\u003cspan\u003eNot interchangeable with metric, BSW, BSF, UNC, UNF or other thread forms.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli style=\"text-align: center;\"\u003e\n\u003cp\u003e\u003cspan\u003eAdjustable round split die for cutting and restoring external threads.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli style=\"text-align: center;\"\u003e\n\u003cp\u003e\u003cspan\u003eRequires a compatible die stock or die holder.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003eEnsure the correct BA size is selected before use.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Rennie Tool Company","offers":[{"title":"12 BA (13\/16\" OD)","offer_id":57740557943159,"sku":"D35051","price":40.47,"currency_code":"GBP","in_stock":true},{"title":"10 BA (13\/16\" OD)","offer_id":57740557975927,"sku":"D35081","price":40.47,"currency_code":"GBP","in_stock":true},{"title":"9 BA (13\/16\" OD)","offer_id":57740558008695,"sku":"D35101","price":40.47,"currency_code":"GBP","in_stock":true},{"title":"8 BA (13\/16\" OD)","offer_id":57740558041463,"sku":"D35151","price":31.03,"currency_code":"GBP","in_stock":true},{"title":"7 BA (13\/16\" OD)","offer_id":57740558074231,"sku":"D35201","price":31.03,"currency_code":"GBP","in_stock":true},{"title":"6 BA (13\/16\" OD)","offer_id":57740558106999,"sku":"D35251","price":23.22,"currency_code":"GBP","in_stock":true},{"title":"5 BA (13\/16\" OD)","offer_id":57740558139767,"sku":"D35351","price":31.03,"currency_code":"GBP","in_stock":true},{"title":"4 BA (13\/16\" OD)","offer_id":57740558172535,"sku":"D35401","price":23.22,"currency_code":"GBP","in_stock":true},{"title":"3 BA (13\/16\" OD)","offer_id":57740558205303,"sku":"D35451","price":31.03,"currency_code":"GBP","in_stock":true},{"title":"2 BA (13\/16\" OD)","offer_id":57740558238071,"sku":"D35501","price":23.22,"currency_code":"GBP","in_stock":true},{"title":"1 BA (13\/16\" OD)","offer_id":57740558270839,"sku":"D35551","price":31.03,"currency_code":"GBP","in_stock":true},{"title":"0 BA (13\/16\" OD)","offer_id":57740558303607,"sku":"D35601","price":23.22,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0067\/9129\/9145\/files\/WisemanSplitDie_1e3d6cb7-6db1-4e70-a26f-cc79305d4ad6.png?v=1788643504","url":"https:\/\/www.rennietool.co.uk\/products\/wiseman-hss-ba-split-dies-british-association-right-hand-thread","provider":"Rennie Tool Company","version":"1.0","type":"link"}