Manufacturing Process
Where advanced CNC technology meets the centuries-old craftsmanship of Sialkot.
THE STEPWIN STANDARD
From Raw Steel to Precision Instrument
Our ISO-certified manufacturing process is designed to eliminate variance. Every instrument that leaves our facility is built to perform flawlessly under pressure.
Material Selection & Testing
We select and test premium medical-grade stainless steel (304, 410, 420, 440) imported from Japan and France. Samples undergo chemical analysis and hardness testing to verify mill certifications before starting production.
Forging
Stainless steel bars are heated and drop-forged using heavy machinery. This crucial step aligns the internal grain structure of the metal, maximizing tensile strength, durability, and fracture resistance.
Milling
The forged blanks are milled, shaped, and machined using high-precision CNC multi-axis machines. This computer-controlled process ensures complex geometries are cut with extreme accuracy (±0.05mm tolerance).
Heat Treatment
Instruments undergo thermal hardening and tempering in advanced vacuum furnaces. This process achieves the exact Rockwell Hardness (HRC) required for specific functions (e.g. 50-54 HRC for scissor cutting edges).
Surface Grinding/polishing
Highly skilled Sialkot craftsmen use specialized abrasive wheels and belts to grind and polish each instrument, achieving a flawless satin, matte, or mirror finish while removing surface imperfections.
Passivation
Instruments undergo electrochemical passivation in a nitric or citric acid bath. This removes free iron from the surface, creating a protective chromium oxide barrier layer that ensures maximum corrosion resistance.
Final QC
Every single instrument is manually inspected for alignment, function, tension, and finish. Rigorous boil tests and copper sulfate testing are performed to verify perfect rust resistance.
Packing
All approved instruments undergo final cleaning and are individually packaged in protective, export-grade materials with clear barcoding and documentation, ready for global shipping.
Need instruments manufactured to your specifications?
Our facility is equipped for OEM production based on your technical drawings.