Toolholder Incorporates Runout Adjustment System

NT Tool now offers the R-Zero runout adjustment system in its CTZ toolholders for large cutting-tool diameters. The R-Zero four-point adjustment mechanism eases runout adjustment at the tool tip to as low as 0 to 2 microns. Equipped with this system, the CTZ toolholder is said to achieve high levels of precision for cutting tool diameters ranging from 1" to 1.5" (25 to 42 mm), making it suitable for reaming and large-diameter hole making. The full adjustment procedure can be completed in under a minute, according to the company, and requires only a spanner for clamping down the tool and the included adjustment wrench for the runout-adjustment screws. An electromagnetic, rust-proof coating ensures that the holder’s accuracy and balance are not compromised.

The toolholder uses the same clamping system as the CTS Super Tite-lock milling chuck, which is designed to prevent slippage and pull-out during heavy machining. In addition to the high gripping force of the mechanism itself, the CTZ R-Zero uses a T-slit inside the bore of the holder to give the compressed cutting tool an area to expand. This locks the tool in place, and prevents it from moving either sideways or vertically even under great force, says the company.

CTZ R-Zero toolholders are available in CAT (standard and two-face contact), BT (standard and two-face contact), HSK, and UTS shank styles. They are offered in metric sizes of 25, 32 and 42 mm, and inch sizes of 1", 1.25" and 1.5", with MC collets for cutting tools of other sizes. The R-Zero runout adjustment system is also available for smaller-diameter cutting tools in a number of different holder types, including the HDZ collet holder and the PHZ hydraulic holder. Custom sizes are also available.