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The INTERNAL TOOL 20-1315 is a solid carbide interior grooving tool designed for cutting internal grooves in bored holes. It operates with a right-hand cutting direction and accepts holes as small as 0.25 inches in minimum diameter. Built from micrograin solid carbide, this tool delivers consistent edge retention and dimensional accuracy in precision machining applications. The full-radius geometry produces a clean, radiused groove profile in a single pass. With an overall length of 3.0 inches and a shank diameter of 0.25 inches, it fits standard collet-style and chuck-style toolholders used on lathes and boring machines.
This grooving tool is suited for interior groove operations on small-diameter bores in production and job-shop environments. Machinists, toolroom technicians, and CNC lathe operators use this type of tool when cutting snap-ring grooves, oil grooves, or relief channels inside bored workpieces. The 0.625-inch projection and 0.625-inch maximum hole depth rating make it well matched to shallow interior groove applications where reach and rigidity both matter.
Designed as an OEM-style interior grooving tool for use in standard 0.25-inch shank toolholders on CNC and manual lathes capable of interior boring and grooving operations.
Installation should be performed by a qualified machinist or toolroom technician. Secure the shank fully in the toolholder collet or boring bar seat before initiating any spindle rotation. Verify that the tool projection does not exceed the rated 0.625-inch depth to avoid tool deflection or breakage. Power down and lock out the machine before changing or adjusting any cutting tool.
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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