Kemmler Main Catalog Precision Tools Page 849
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Technical Information for Polygon Shank Adapters In 1990 (patent application 1988), Sandvik Coromant presented a polygonal hollow shank taper with face contact under the brand name Coromant Capto®, developed for all types of application - turning, milling and drilling. Then standardised in 2008 as the ISO/DIS 26623 standard for ‘Polygonal taper interfaces with a flange contact surface’ [ISO 26623-1:2008]. The standard previously covered flange sizes 32 to 80 (C3 to C8) and was extended in July 2013 to include polygonal shank size 100 (C10) [ISO 26623-1:2014]. In ISO 26623-1:2020-11, fluid transfer units for tool interfaces according to ISO 22402-2:2022-02 were added. The tapered polygon in conjunction with the tight tolerance provides backlash-free centering also acts as pull back. The PSC cone has very high rigidity and bending strength. The main advantages of this interface are the transmittable torque stability, the resistance against radial forces acting on the tool and the exact center height. This means high feed rates can be achieved on large material cross sections. The PSC interface is ideally suited for all machining operations such as drilling, turning and milling. Bore for radial coolant supply Bore for data chip Taper 1:20 Positional orientation Grooves for automatic tool change (ATC) Axial and radial contact K43 Free of axial and radial play. Self centering and symmetrical force distribution through the tapered polygon in connection with the taper / face contact. 13 13.52
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