The CoroThread 266 thread turning tool from Sandvik Coromant is available with precision over- and under-coolant to improve process security and maximize efficiency. The addition of over-coolant improves chip formation for more secure machining, while under-coolant controls temperature for long and predictable tool life. Precision coolant also has positive effects on surface finish, supporting the generation of high-quality threads.
“Process security and stability are paramount in thread turning operations to ensure the machining of 'right first time' threads, every time,” explains Hampus Olsson, product manager thread turning at Sandvik Coromant. “Along with precision coolant, this is why CoroThread 266 features the proprietary iLock interface between the holder and insert, which prevents cutting forces from causing micromovements of the insert in the tip seat. In addition, for applications where long overhangs are unavoidable, the use of dedicated, damped Silent Tools adapters provides a proven way to reduce vibration and maintain precision.”
Ideal for external and internal thread turning, a wide standard assortment of insert thread profiles with dedicated grades and geometries is available for all materials. A Tailor Made offer can be provided for an extended thread profile assortment.
Quick-change toolholders with precision coolant include Coromant Capto C3, C4, C5, and C6 for use with 16 mm (0.630 inch) inserts, as well as QS shanks in 20×20 and 25×25 mm sizes with 16 mm (0.630 inch) and 22 mm (0.870 inch) inserts. For internal thread turning, a minimum hole diameter of 20 mm (0.790 inch) is required.
Fluid that reduces temperature buildup at the tool/workpiece interface during machining. Normally takes the form of a liquid such as soluble or chemical mixtures (semisynthetic, synthetic) but can be pressurized air or other gas. Because of water’s ability to absorb great quantities of heat, it is widely used as a coolant and vehicle for various cutting compounds, with the water-to-compound ratio varying with the machining task. See cutting fluid; semisynthetic cutting fluid; soluble-oil cutting fluid; synthetic cutting fluid.
Workpiece is held in a chuck, mounted on a face plate or secured between centers and rotated while a cutting tool, normally a single-point tool, is fed into it along its periphery or across its end or face. Takes the form of straight turning (cutting along the periphery of the workpiece); taper turning (creating a taper); step turning (turning different-size diameters on the same work); chamfering (beveling an edge or shoulder); facing (cutting on an end); turning threads (usually external but can be internal); roughing (high-volume metal removal); and finishing (final light cuts). Performed on lathes, turning centers, chucking machines, automatic screw machines and similar machines.
Typical aero-engine components that the grades can machine are gas turbine discs, casings, blisks, spools, shafts and blades. But these grades also prove to be a great choice in demanding applications such as power generation turbines and medical implants made of cobalt-chrome
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