Guhring GT106.4738.015 303559356 Solid Carbide Internal Grooving Bar Right Hand

The Guhring GT106.4738.015 (Guhring catalog no. 303559356) is a new solid carbide internal grooving bar from Guhring's NBI Grooving Systems line, designed for bore grooving and internal recessing operations on CNC lathes and turning centers. Decoded from the part number designation: GT106 identifies this as a solid carbide shanked grooving bar in the GT1 series; 4738 encodes the shank diameter of 4.7 mm and a bore grooving reach suited to very small bores; the suffix .015 denotes a 0.15 mm corner radius on the ground cutting edge; the designation suffix .25.40.R.U1 (visible on the label) indicates a grooving width of 0.25 mm, maximum grooving depth of 0.40 mm, right-hand cutting direction, and U1 ground geometry for precision internal groove profiles. The tool body carries a black oxide / DLC-type surface treatment on the shank for corrosion resistance, while the cutting tip is ground carbide with a bright-finished rake face as visible in the photos. Made in Germany, this tool is suited for producing internal retaining-ring grooves, seal grooves, and precision recesses in miniature bores in materials including steel, stainless, aluminum, and non-ferrous alloys. Compatible with toolholders and boring bar adapters accepting the specified shank diameter.

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