NT Tool’s Toolholders for Large-Diameter Cutting Tools

Originally titled 'Toolholders for Large-Diameter Cutting Tools'

NT Tool’s R-Zero runout adjustment system in its CTZ toolholders are designed for large cutting tool diameters.

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NT Tool’s R-Zero runout adjustment system in its CTZ toolholders are designed for large cutting tool diameters. The four-point adjustment mechanism makes it easy to adjust runout at the tool tip to as low as 0 to 2 microns. The holder allows high levels of precision for cutting tool diameters from 1” to 1.5” (or 25 to 42 mm), making it a good choice for reaming and large-diameter holemaking, the company says.

The full adjustment procedure can be completed in less than 60 seconds. Setup requires a spanner for clamping down the tool and an adjustment wrench (included) for the runout-adjustment screws. An electromagnetic rust-proof coating, standard for most NT holders, ensures the holder’s accuracy and balance is not compromised over the holder’s life, the company says.

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

The holders 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 mm, 32 mm 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 small-diameter cutting tools in a number of different holder types, including the HDZ collet holder and the PHZ hydraulic holder. Custom sizes are accommodated.

 

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