Nissan S15 Mission Shaft Set (Main & Counter): WPC Treatment Series
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View the full price list for WPC treatments and options. (PDF)
See how WPC treatment improves surface hardness.
(View PDF)
Core Strength for Your Drivetrain: The Science of WPC Treatment®
WPC Treatment is a revolutionary surface refinement technology that drastically improves metal characteristics.
By bombarding the metal surface with ultra-fine spherical shots at high speeds (200m/s), we achieve three critical performance upgrades for transmission shafts:
Increased Fatigue Strength: Instantaneous heating and cooling during impact micro-refines the crystal structure, significantly enhancing the shaft's resistance to twisting and high-torque loads.
Higher Surface Hardness: Repeated plastic deformation creates a work-hardened, toughened layer to prevent premature wear.
Superior Lubrication: Micro-dimples on the surface act as oil reservoirs, preventing oil film breakdown and ensuring consistent lubrication across the entire shaft.
Precision Finishing Technology
Sirius Finish® (Advanced Polishing) This specialized method achieves a mirror-like smoothness (thousands-grit level) on complex geometries. It refines the WPC-strengthened surface to reduce friction and mechanical loss to the absolute minimum, ensuring a smooth rotation of the gears.
MoS2 Shot Treatment (Available Option) A binder-free process that fuses Molybdenum Disulfide directly to the metal surface. This provides a permanent solid lubricant layer, maximizing the reduction in sliding resistance without the need for resin-based coatings.
Composite Treatment Benefits
(A) WPC + Sirius: Optimized for maximum shaft strength combined with a highly refined surface for reduced mechanical drag.
(B) WPC + MoS2: Focused on high strength and the massive reduction of friction.
(C) WPC + Sirius + MoS2: The Ultimate Specification. Provides the lowest possible friction and the highest durability for high-power drifting and circuit racing.
Note: WPC Treatment® and Sirius Finish® are patented technologies of
Fuji Manufacturing Co., Ltd.
We can customize the treatment process based on your specific racing conditions and requirements.
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