Guhring GT106.4758.015 .25.60.R.U1 Carbide Internal Grooving Bar

The Gühring 303559354 is a solid carbide internal grooving boring bar from the Gühring Grooving Systems GT106 series, designated GT106.4758.015.25.60.R.U1, manufactured in Germany and supplied new in original plastic clamshell packaging. Decoding the full part number: GT106 identifies the series (solid carbide internal grooving bar); 4758 encodes the shank diameter as 4.758 mm (approx. 3/16 in) and overall length characteristics; .015 specifies the groove width (cutting edge width) of 0.015 in (0.381 mm); .25 specifies the minimum bore diameter of 0.25 in (6.35 mm); .60 specifies the usable/bore depth reach of 0.60 in (15.24 mm); R indicates a right-hand cut orientation; and U1 denotes the carbide grade designation used by Gühring for this tool family. The tool features a reduced-diameter neck ground ahead of the shank to maximize reach into small-diameter bores, a single-point ground cutting tip geometry optimized for internal groove/snap-ring groove cutting on CNC lathes and screw machines, and the characteristic dark DLC/PVD-type coating visible in the photos for improved wear resistance and chip evacuation in steel, stainless, and aluminum applications. Compatible with standard cylindrical boring bar holders accepting a 3/16 in round shank.

Product Specifications