{"product_id":"5770-3-8-1-32-over","title":"Robert Charles Plain Shank Counterbore M35-HSS-E 5% Cobalt - 3\/8 Cap Screw Size - 0.406 Pilot Size","description":"\u003cdiv\u003e\n\u003cp\u003eThe Robert Charles Plain Shank Counterbore is a high-precision cutting tool designed for engineers, machinists, and workshops that require clean, repeatable counterbores in a single setup. Built from M35 HSS-E with 5% cobalt, it delivers exceptional heat resistance and wear life for demanding metals.\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eMaterial\u003c\/b\u003e: M35 HSS-E with 5% cobalt for improved heat resistance, edge retention, and extended tool life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eShank Type\u003c\/b\u003e: Plain shank design for easy fitment in standard tool holders, promoting stable machining.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSize Specifications\u003c\/b\u003e: 3\/8 cap screw size and a 0.406 pilot size for precise alignment and depth control.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eApplication\u003c\/b\u003e: Optimized for accurate, clean counterboring in precision engineering, automotive, and general workshop tasks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePerformance\u003c\/b\u003e: Designed to maintain a sharp cutting edge under high-speed cutting and demanding conditions.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWith its cobalt-enhanced HSS substrate, this counterbore delivers dependable edge retention and long tool life, helping you complete precise counterbores with fewer tool changes. The plain shank ensures consistent seating in standard holders, minimizing runout and enabling repeatable depths and clean sidewalls. The exact 0.406\" pilot size and 3\/8\" cap screw compatibility simplify setup with common fixtures and jigs, making it a reliable choice for production runs and individual projects alike.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Robert Charles","offers":[{"title":"Default Title","offer_id":43411728367694,"sku":"5770-3\/8-1\/32 OVER","price":63.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/Robert_Charles_Counterbores_2d8b231c-f99f-4060-b022-5a7526bbf37d.png?v=1769685339","url":"https:\/\/www.protool-ltd.co.uk\/products\/5770-3-8-1-32-over","provider":"Protool Precision Tools","version":"1.0","type":"link"}