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The INTERNAL TOOL 20-1475 is a solid carbide, right-hand-cut O-ring grooving tool designed for cutting precise interior grooves in bored holes. Built from micrograin solid carbide, it delivers the edge integrity and wear resistance needed for consistent groove geometry in hydraulic, pneumatic, and fluid-handling components. The tool accepts a minimum hole diameter of 0.375 inches and produces a groove width of 0.048 inches, making it suited for standard O-ring groove profiles in small-bore applications. With an overall length of 2.5 inches and a 0.375-inch shank diameter, it mounts in conventional tool holders used on manual and CNC lathes.
This grooving tool is used in machine shop and production environments where interior O-ring grooves must be cut to close tolerances in bores starting at 0.375 inches. Typical applications include hydraulic fittings, valve bodies, cylinder bores, and fluid manifolds where a reliable O-ring seal seat is required. The 0.75-inch maximum hole depth and 0.75-inch projection define the reach envelope for interior groove placement. Machinists and tool-and-die technicians working in HVAC, plumbing, and fluid-power component manufacturing will find this tool applicable to right-hand turning operations on standard lathes.
Designed as an OEM-style replacement or standard tooling option for interior O-ring grooving operations in bores with a minimum diameter of 0.375 inches and a maximum depth of 0.75 inches on right-hand lathes and turning centers.
This tool is installed by machinists in a lathe or CNC turning center using a compatible tool holder sized for a 0.375-inch shank. Ensure the workpiece and spindle are fully stopped before changing or indexing tooling. Verify tool projection and depth-of-cut settings against the target groove dimensions before engaging the cut. Follow shop safety practices and applicable machine guarding requirements when operating turning equipment.
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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