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The ACCUPRO ACC-G055-20 is a solid carbide internal grooving tool designed for cutting retaining ring grooves in bored holes. Built from submicron-grade carbide, it delivers the hardness and edge retention needed for precision grooving in ferrous and non-ferrous materials. The tool features a 3/8 inch shank diameter and an overall length of 2.5 inches, making it compatible with standard boring bar holders and tool blocks. A projection of 0.110 inches positions the cutting edge for accurate groove placement. Machinists and tool-and-die professionals use this tool on lathes and boring mills where tight-tolerance retaining ring grooves are required for shaft and bore assemblies.
This grooving tool is suited for internal retaining ring groove applications in production and job-shop environments. It handles a minimum hole diameter of 0.375 inches and reaches a maximum hole depth of 1.25 inches, covering a practical range of bore sizes found in hydraulic cylinders, gearboxes, bearing housings, and similar assemblies. The solid carbide construction supports higher cutting speeds compared to high-speed steel alternatives, making it a reliable choice for shops running tighter cycle times on CNC lathes or manual boring equipment.
Designed as an OEM-style grooving tool for use in standard 3/8 inch shank tool holders on CNC and manual lathes or boring machines capable of internal retaining ring groove operations.
This tool is installed by machinists and tool-and-die technicians in a properly sized shank holder or boring bar block. Ensure the machine spindle is fully stopped and the tool holder is securely clamped before inserting or removing the tool. Verify that bore diameter and depth clearances match the tool specifications before beginning the cut. Follow the machine manufacturer guidelines and applicable shop safety standards when setting tool projection and depth stops.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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