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The HORN R105182325TH35 is a solid carbide profile boring bar engineered for precision internal profiling operations on CNC turning centers and boring machines. It features a right-hand cutting direction and an AlTiN finish coating that improves heat resistance and tool life in demanding cutting conditions. The bar has a minimum bore diameter of 0.197 inches and a maximum bore depth of 0.591 inches, with an overall length of 1.378 inches. A 0.008-inch corner radius provides controlled edge geometry for consistent surface finish. This tooling is installed by machinists and CNC toolroom technicians working in production or job-shop environments.
This profile boring bar is suited for small-diameter internal profiling and finishing passes in ferrous and non-ferrous workpieces. Its compact geometry makes it appropriate for tight-bore applications where clearance is limited. The 4.00 mm shank diameter is compatible with toolholding systems designed for that bore size. The TH35 grade designation indicates the carbide substrate and coating combination selected by HORN for this geometry. Typical applications include internal contour turning, groove profiling, and finish boring in precision component manufacturing.
Designed for use in toolholding systems accepting a 4.00 mm shank diameter. Confirm toolholder bore size and clamping method before installation.
Installation should be performed by a qualified machinist or CNC toolroom technician. Ensure the machine spindle is fully stopped and the control is in an e-stop or locked-out state before changing tooling. Verify shank seating depth and runout with a dial indicator before production use. Follow the toolholder manufacturer guidelines for clamping torque and projection length.
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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