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The ACCUPRO ACC-G038-12 is a solid carbide retaining ring grooving tool designed for internal grooving operations on small-diameter bores. Built from submicron-grade carbide, this tool delivers the edge retention and rigidity needed for precise groove cutting in tight tolerances. It features a 5/16-inch shank diameter and a 0.0385-inch groove width, making it suited for cutting the narrow, accurate grooves required by retaining ring seats. Machinists and toolroom professionals use this tool in CNC lathes and manual turning setups where consistent groove geometry is critical to proper ring retention.
This grooving tool is applied in precision machining environments where internal retaining ring grooves must meet close dimensional tolerances. With a minimum hole diameter of 0.312 inches and a maximum hole depth of 0.75 inches, it is well matched to small-bore work in production and job-shop settings. The 0.11-inch projection and 2.5-inch overall length suit typical short-reach internal grooving applications. It is commonly used in metalworking shops handling hydraulic components, pneumatic cylinders, shafts, and similar assemblies that rely on retaining ring retention.
Designed as an OEM-style replacement or direct-use internal grooving tool for CNC and manual lathes accepting a 5/16-inch round shank, suitable for operations requiring a 0.0385-inch groove width in bores at or above 0.312 inches in diameter.
Installation and use of this grooving tool should be performed by a qualified machinist familiar with internal grooving operations. Secure the shank firmly in a calibrated toolholder or collet chuck before operation, and verify runout is within acceptable limits before cutting. Ensure the workpiece is properly chucked and the machine spindle is at a full stop before tool changes. Follow the machine manufacturer's recommended feeds and speeds for solid carbide tooling in the workpiece material.
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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