Section G 25-26

Polygonal Shank Style Polygon Shank Toolholders

■ General Features SumiPolygon shanks feature keyless couplings with the characteristic polygonal shape, which bear cutting torque evenly on three surfaces, providing high rigidity and high index accuracy.

G

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■ Coupling Structure

■ Features ● Sizes · Shank size PSC32 (DCSFMS = 32mm) to PSC80 (DCSFMS = 80mm) supported ● High Rigidity/High Precision · 1/20 polygon tapered shape supported on 2 faces for high rigidity · Keyless coupling distributes cutting torque uniformly to 3 faces, reducing fluctuations in cutting edge height · Repeatability when tools are changed is within ±2μm on all 3 axes ● Reduced Tool Change Time · Changing inserts on the machine is not needed so the tool change time is significantly reduced ● Coolant supported (up to 1MPa)

Tapered + Supported by 2 Faces

Improved Centring

■ Repeat Accuracy Repeatability when tools are changed is within ±2μm on all 3 axes X-Axis (Radial Direction) Y-Axis (Center Height Direction), Z-Axis (Lengthwise Direction)

3

X-Axis (Radial) Z-Axis (Centre Height) Y-Axis (Length)

2

Y-Axis ±2μm

X-Axis ±2μm

1

Z-Axis ±2μm

0

1 2 3 4 5 Tool Change Count (Times)

G8

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