Automotive Parts Manufacturing

Why Choose WKPT for Commercial Vehicle Industry?

WKPT is the largest supplier of machining parts for commercial vehicles in Taiwan.

WKPT is the largest supplier of machining parts for commercial vehicles in Taiwan. The main production parts include shock absorber brackets, mounting brackets, torsion plates, and gearbox housings for commercial vehicle chassis axles (bridges). Brake calipers, brake brackets, brake pad backing plates, thrust plates, and wheel hubs for brake systems are also available.


10 Countries
150 Machining Cases



With over thirty years of experience in manufacturing commercial vehicle parts, we have established long-term and stable partnerships with world-renowned commercial vehicle manufacturers. We provide one-stop machining manufacturing services for commercial vehicle parts.


Our commercial vehicle parts machining is widely recognized by world-leading manufacturers such as CUMMINS, NAVISTAR, Haldex, and Volvo.


We have the technical capability to collaborate with customers in developing new commercial vehicle parts. We also offer relevant parts development in response to the electric vehicle trend, such as electronic brake components for electric buses, servo motor housings, transmission gearbox housings, and driver housings.


We are certified in ISO 9001:2015 and IATF16949 quality management systems, providing commercial vehicle parts that meet the global automotive industry quality standards.

Environmental Protection

To reduce air pollution caused by emissions from fuel-powered vehicles, the trend in vehicle design is towards lightweight. Alternative energy vehicles such as electric cars and natural gas vehicles are also flourishing. In response, we have developed manufacturing processes for lightweight aluminum alloy vehicle components and are actively expanding our business in electric and natural gas vehicle sectors.


Our experienced English and Japanese-speaking sales representatives can provide full-service support from commercial vehicle parts design to product delivery. In addition to our core service - machining, we also offer related manufacturing and post-processing technologies to streamline your procurement management.



    Cast iron materials refer to iron-carbon alloys with carbon content more than 2.11%. In addition to carbon, there are also elements such as silicon, manganese, and a small amount of sulfur and phosphorus.

    Aluminum alloy is the general term for aluminum-based alloys. The main alloy elements are copper, silicon, magnesium, zinc, and manganese, and the secondary alloy elements are nickel, iron, titanium, and chromium.

    Stainless steel, also known as galvanized iron, is the common name for corrosion-resistant steel. More specifically, steel with chromium (Cr) content greater than 12% in molten steel is called stainless steel.

    Carbon steel is an iron alloy with carbon elements, that is, iron-carbon alloy. Carbon steel refers to carbon content higher than 0.02% and lower than 2% (above 2% is called cast iron, and less than 0.02% is called wrought iron).

    Manufacturing Capabilities

    WKPT provides manufacturing services for commercial vehicle parts, utilizing materials such as cast iron (sand casting), aluminum alloy (gravity casting, die-casting, investment casting, forging, and extrusion), as well as steel. In addition to forming, we also offer comprehensive machining processes including precision machining, surface treatment, assembly, and testing.

    The transportation industry relies on commercial vehicles to fulfill tasks related to logistics and traffic transportation, with safety being a primary concern for most expectations. Components for commercial vehicles must adhere to strict tolerances to ensure smooth operation and minimize unnecessary wear and tear. In order to meet the requirements of commercial transportation, WKPT has developed CNC precision machining processes that meet the stringent tolerances and surface roughness required for components in the transportation industry. With machining capabilities of up to 1µm precision and surface roughness of Ra0.2µm, WKPT supplies the necessary components for the commercial vehicle sector.

    In addition to safety, durability is also a concern for the commercial transportation industry, so commercial vehicle components need to meet durability expectations. Achieving greater durability for commercial vehicle components can be accomplished through heat treatment or surface treatment. Whether it's achieving better mechanical properties through heat treatment, increasing r ust resistance through coating treatments, or enhancing surface wear resistance through electroplating treatments, WKPT can provide added durability value to commercial vehicle components which are entrusted us for forming or machining.

    More Resources

    WKPT has reduced carbon emissions via process upgrade, in compliance with global green supply chain requirements
    Robotic Arm【Machining】
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      The swash plate of the oil pump has strict requirements on the size, which is not able to be done by ordinary cutting centers. To meet the customer's drawing requirements, hardness enhanced by heat treatment, and grinding process are necessary in the process. Non-contact measurement will be used on partial holes to cover where three dimensional measurements can’t do.

      Exhaust gas manifold, EGR (Exhaust Gas Recirculation) body, or automotive secondary intake manifold, secondary exhaust gas upper manifold. The partial product shape and size is shaped by gravity casting aluminum alloy. The aluminum alloy workpiece by gravity casting has stable quality. This makes castings with high precision dimensions and finer surface roughness, which can reduce the range of machining. The exhaust gas manifold is used to guide the exhaust gas back to the intake manifold, making it inhaled and burned by the engine again. Product properties should have high temperature resistance and vibration resistance. The dimension and shape tolerance is required to be below 15μm, and the surface roughness is required to be below Ra1.6.

      The gearbox housing is the cover of the power transmission system of agricultural machinery. It is made of ductile iron with excellent material properties. The precision and shape tolerance after machining must meet the requirements of the customer's drawing.

      Gearbox spindle is used in high temperatures and harsh environments, and the properties of the gearbox are stable, so the requirements for material and accuracy are very strict. For the Zero Defect in the automotive industry, WKPT has built the first smart production line of gearbox spindle in Taiwan. IoT digitalization, real-time computing technology like automatic dispatching, parameters and accuracy compensation are imported to improve product line utilization rate and production yield.

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