WRD is proud to offer the WPC treatment to those customers wanting more from their transmission. WPC is a micro shot peening process that that enhances the surface to reduce friction and strengthen parts.

This process is achieved by firing ultra fine particles towards the surface of the product at very high speeds. The resulting thermal discharge permanently changes the surface, strengthening structure and creating a harder more durable final product. WPC is superior because it is not a coating; it is a permanent surface treatment that reduces friction while strengthening the part. It's unique micro-dimple formation pattern greatly reduces friction and is unmatched by conventional methods of surface treatment.

Treatable products include steel, aluminum, titanium, copper and brass and soft surfaced bearings. WPC can treat any metallic item in a disassembled state. WRD has developed processes for dismantling taper roller bearings so that all major transmission components can be treated.

Reduced Friction
The fine grooves, which are intrinsically engraved into the product surface at the time of machining, are transformed into micro-dimple indentations by the impact of the ultra-fine media during WPC treatment. These dimples then act as oil reservoirs. Furthermore, solid lubricants such as Tin (Sn) and Molybdenum Disulfide (MoS2) can be utilized as media in the WPC process to embed them into the product surface. This reduces friction further and improves the life and efficiency of the product to an even greater level.

Greater Durability
The ultra-fine media of the WPC process, when projected at high velocity towards the product surface, creates compressive stress at the impact points. At the same time, a micro thermal reaction takes place. It effectively seals minor surface fractures. It also allows a condensed surface to form that has improved density due to compaction. This altered and highly compact surface condition overcomes the problem of brittleness that is usually encountered when metals are hardened. 

The numerous impacts during the WPC process not only increase the residual compressive stress but also cause it to reside a lot closer to the surface. The cumulative result is a product that has durability unrivalled by conventional peening methods.

Pricing for WPC is on a case by case basis and is available for as many or as few components as you like, additional labor costs may be incurred for disassembly and reassembly of bearings so please call to discuss your needs.