APJ Sikora – CNC Machining Experts
APJ Sikora is a manufacturer of CNC components and a Polish CNC partner based in Częstochowa, Poland. For generations, we have been combining craftsmanship tradition with precision CNC machining for industry, supplying components to both domestic and international markets.
APJ Sikora History – Over 90 Years of Tradition and Growth
1928Antoni Sikora joins the locksmiths’ guild
Lata 30. XX wieku Start of manufacturing operations
1940Design and construction of proprietary cam-operated machines
1993Formation of APJ Sikora general partnership
2001Implementation of CNC technology
2007Opening of a new metrology laboratory
2008Introduction of ISO 9001:2008 standard
2016Purchase of a coordinate measuring machine (CMM)
2019 Launch of ERP and warehouse management system (MWS)
A Tradition That Obligates – Operating Since 1928
Our story began in 1928, when Antoni Sikora joined the locksmiths’ guild and laid the foundation for what today has become a benchmark for CNC machining Poland, Częstochowa.
In the 1930s, we started operations as a craft workshop. Antoni Sikora not only ran the production but also designed and built cam-operated automatic machines – a technology scarcely available in Poland at that time.
These early, proprietary designs defined the direction of our company’s development: technological innovation in the service of precision and repeatability.
The idea of designing machines in-house and developing production capabilities has stayed with us to this day – now executed through modern CNC systems and digital quality control.
Early Years & Production
As a CNC parts manufacturer, we focus on delivering solutions tailored to customer needs.
From the beginning, we specialized in small, precision components made of brass and steel, as well as low- and medium-series CNC-milled components.
Our production range included, among others:
- Tyre valves
- Lock components for women's handbags
- Fur coat clasps
- Fasteners and decorative fittings for lamps and furniture
We were also one of the largest manufacturers of lamp parts in Poland – this early production of turned parts and CNC milled components significantly contributed to the plant’s expansion and strengthened our position in the metal components market.
Modern Technology – Where Tradition Meets Innovation
Our machine park includes sliding-head lathes, turning centers, and milling stations, which allow us to combine CNC turning and milling in a single setup.
This enables us to perform precision turning, aluminum turning, and stainless steel machining in the diameter range of Ø 3–65 mm.
Thanks to a variety of technologies and a qualified team, we produce both high-precision components and less complex parts, tailored to individual customer expectations.
Certified CNC Machining – ISO 9001 Quality Control
We take care of every stage of the production process – from material selection to the finished product. Our CMM laboratory performs full CNC quality control, verifying dimensions, shape, and position of components with an accuracy of ±0.005 mm.
Each batch is manufactured under certified CNC machining according to ISO 9001 standards and then transferred to the CMM laboratory, where it undergoes thorough measurements and quality verification.
A digital SPC system records results in real time and generates SPC reports and Cp/Cpk charts, ensuring ISO 9001 certified CNC machining and full production repeatability.
Learn more about the ISO 9001 on the Dekra website.
Standards and Process Documentation
We work within a certified CNC machining ISO 9001 system, maintaining full traceability of production and strict quality control, supported by data from our CMM laboratory.
Upon customer request, we prepare full process documentation, including:
- Control sheets and measurement plans
- PPAP or VDA-4 documentation
- Statistical reports (Cp, Cpk, Pp, Ppk)
- Compliance protocols and first article inspection reports (FAI, EMPB)
Capabilities That Support Your Production
As CNC experts APJ Sikora serves industries such as aerospace, hydraulics, medical, and energy – delivering projects from single prototypes to production runs of 100,000 pieces.
Our CNC machining in Poland, Częstochowa provides components that are fully compliant with technical documentation and the required level of dimensional accuracy.
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