{"product_id":"5770-5-1-64-over","title":"Robert Charles Plain Shank Counterbore M35-HSS-E 5% Cobalt - #5 Cap Screw Size - 0.140 Pilot Size","description":"\u003cdiv\u003e\n\u003cp\u003eThe Robert Charles Plain Shank Counterbore is a precision cutting tool designed for clean, accurate counterboring in metalworking. Built from M35 HSS-E with 5% cobalt, it delivers outstanding heat resistance and wear life for demanding machining tasks.\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eMaterial\u003c\/b\u003e: M35 HSS-E with 5% cobalt for extended edge retention and high-temperature performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eShank Type\u003c\/b\u003e: Plain shank enables straightforward fitment in standard tool holders for stable, repeatable machining.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePilot Size\u003c\/b\u003e: 0.140 inch pilot aids precise entry and depth control during countersinking.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCap Screw Compatibility\u003c\/b\u003e: Sized for #5 cap screws, aligning with common fastener standards in assemblies.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCounterbore Geometry\u003c\/b\u003e: Optimized flute and cutting edge geometry deliver smooth cutting and clean bore edges.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eUse this counterbore to achieve burr-free, accurately aligned holes that support secure fastener installation and reliable assembly. The cobalt-enhanced HSS resists heat and wear, reducing tool changes and enabling longer production runs in precision engineering, automotive workshops, and shop floors. Pair with appropriate feeds and speeds, use a light coolant if required, and maintain the tool to preserve edge life for consistent performance across batches.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Robert Charles","offers":[{"title":"Default Title","offer_id":43411727155278,"sku":"5770-5-1\/64 OVER","price":34.76,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/Robert_Charles_Counterbores_afb5f195-1552-487b-b770-96b1bef753eb.png?v=1769685251","url":"https:\/\/www.protool-ltd.co.uk\/products\/5770-5-1-64-over","provider":"Protool Precision Tools","version":"1.0","type":"link"}