3Racing SAK-40K 7075 40mm Swing Shaft for Sakura FF and Zero  [SAK-40K]

3RACING Sakura Zero 40mm Swing Shaft - 7075 for Sakura FF, Zero - SAK-40K
Price:
USD$6.30
Brand:
3Racing
Model:
SAK-40K
Condition:
Brand New
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Race Setup 7075 Swing Shaft for Sakura FF and Zero

The 3Racing SAK-40K is a 40mm swing shaft manufactured from 7075 aluminum and intended for racers seeking a firmer drivetrain feel. Its material choice and precise length target reduced elastic deformation under load, supporting tighter power delivery and predictable handling during competition.

Performance Notes for Tuned Vehicles

  • Material: 7075 alloy selected for higher yield strength and fatigue resistance relative to softer aluminum grades.
  • Compatibility: Designed to align with Sakura FF and Zero chassis dimensions for reliable fitment.
  • Length: 40mm to maintain accurate gear and joint geometry in stock and lightly modified setups.
  • Functionality: Improves rotational stiffness and helps minimise transient drivetrain lash under high torque.

How should I integrate the SAK-40K into a tuned setup?

Install as a direct replacement, then verify alignment and single out any drivetrain binding; small changes to slipper or diff preload may be required to balance the stiffer shaft.

Does this shaft affect diff behaviour?

Increased shaft stiffness can change how torque is transferred through the diff under load, so re-evaluate diff settings after fitting to retain predictable handling.

What precision checks are recommended?

Confirm concentricity and runout after installation, ensure grub screws are seated without overtorque, and inspect for any impact damage before competitive use.

Which setup scenarios benefit most from this part?

High power or tightly tuned drive trains that need lower elastic deflection and consistent response across laps will see the greatest advantage.