{"product_id":"5770-3-8-1-64-over","title":"Robert Charles Plain Shank Counterbore M35-HSS-E 5% Cobalt - 3\/8 Cap Screw Size - 0.39 Pilot Size","description":"\u003cdiv\u003e\n\u003cp\u003eThe Robert Charles Plain Shank Counterbore is a precision cutting tool designed for accurate, clean counterboring in engineering, automotive, and general workshop applications. Crafted from M35 HSS-E with 5% cobalt, it delivers reliable heat resistance and long-lasting cutting performance in demanding tasks.\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eMaterial\u003c\/b\u003e: M35 HSS-E with 5% cobalt for enhanced heat resistance and wear life during high-speed cutting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eShank Type\u003c\/b\u003e: Plain shank for straightforward fitment in standard tool holders, enabling stable and consistent machining.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePilot Size\u003c\/b\u003e: 0.39\" pilot to guide the bore with precision and repeatability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCap Screw Size\u003c\/b\u003e: Compatible with 3\/8\" cap screws to secure the counterboring setup.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDesign \u0026amp; Geometry\u003c\/b\u003e: Optimized counterbore geometry for clean, flat-bottomed holes and reliable depth control.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eApplications\u003c\/b\u003e: Ideal for precision engineering, automotive work, and general workshops where durable, repeatable counterboring is essential.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eDesigned to deliver consistent, repeatable results, this counterbore minimizes rework and ensures solid fastener seating. The cobalt-enhanced alloy maintains sharpness longer under heat, reducing tool changes and downtime. With its plain shank and compatible cap screw sizing, setup is straightforward, making it a dependable choice for both routine production and precision prototyping. Whether you’re working with metal sheets, plates, or assemblies, this tool helps you achieve precise depths and clean faces for a professional finish.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Robert Charles","offers":[{"title":"Default Title","offer_id":43411728302158,"sku":"5770-3\/8-1\/64 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_d73630af-5352-4bf3-8916-73fceb0d4ce4.png?v=1769685335","url":"https:\/\/www.protool-ltd.co.uk\/products\/5770-3-8-1-64-over","provider":"Protool Precision Tools","version":"1.0","type":"link"}