A Reinforced Shank Guide Bush is a specialized, heavy-duty variant of the standard guide bush used in Swiss-type CNC lathes. While a standard guide bush (like the Drawn Type 100) provides the essential "sliding bearing" for bar stock, the reinforced shank version is engineered specifically to handle higher radial loads and minimize vibration in demanding machining environments.
This design is most commonly associated with Star and Citizen (Cincom) machines, particularly for models like the Star SB-16, SR-16, and RNC-16.
Vibration Dampening
The
extra mass of the reinforced shank acts as a "damper." This is critical when machining tough
materials like Stainless Steel 316 or Titanium, where tool chatter can easily ruin a surface
finish.
Increased Radial Rigidity
When performing heavy "pinch turning" (where two tools cut the part simultaneously from
opposite sides), the reinforced shank ensures the guide bush remains perfectly centered.
Extended Tool Life
Because the material is held more rigidly, the cutting tools experience less
"micro-vibration." This leads to more predictable tool wear and longer intervals between
tool changes.
Heat Dissipation
The
larger steel body helps dissipate heat more effectively than a slim
standard bush, preventing the bar stock from "seizing" or galling against the carbide lining
during high-speed rotation (>10,000 RPM).
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