Page 381 - Gear Technology Solutions

The outside blade next to it appears balanced; however, there are also unnec-
essary amounts of carbide on the shoulders. The lower two graphics in Figure
5 present a solution by implementing parallels. Both blade blanks require 20%
less carbide than the blades in the upper graphic and both blades are bal-
anced without any cutoffs. This solution had been realized with rectangular
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parallels in the RSR cutter system going back to the 1970’s.

27.4 A New Spacer Design

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Pentac cutter heads provide a blade seating prism which gives the blade
sticks a stiff and solid positive seating as shown in Figure 6 [2]. While the
blades are clamped, the clamping force FC creates reaction forces FR1 And
FR2. The cutting force will increase especially the component FR1 which has a
nearly opposite direction to the cutting force. Such a geometrical arrangement
is ideal for preventing dynamic blade movements and deflections, especially
important for carbide blades. For a cutting process employing carbide this
means high tool life and high surface finish. The radially truing feature of all
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Pentac cutter heads improves those attributes even further.

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Figure 6: Positive seating of Pentac blades

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