While zinc die casting offers great scope for casting very tight tolerances directly in the casting process, some parts require post-machining to achieve the desired tolerance on surfaces, holes, and milled threads. That is why CNC machining has been one of our in-house processes for more than 20 years: parts go from casting to finished, inspected component without leaving the building — and without external suppliers along the way. Our machining centre handles milling, drilling, thread cutting and thread milling — all under the same roof as the casting.
Process planning starts as early as the quotation stage. Planning the entire production flow when we prepare the quotation is the foundation for the most efficient production process possible.
Multi-axis CNC milling centres machine critical features: bores, threads, mating surfaces, and tight-tolerance dimensions that exceed as-cast capability.
After casting and CNC machining, the various deburring processes come into play. The process is chosen to match the customer's surface requirements: vibratory deburring, shot blasting, plastic media blasting, or tumbling.
Process verification is carried out according to the requirements agreed with the customer at the quotation stage. CMM spot-check inspections and SPC data (statistical process control) are used to ensure the process remains stable.
When casting, CNC machining, and deburring all happen under one roof, there is one supplier and one responsibility throughout. No coordination between foundry and machine shop, no transport between suppliers — and no quality gaps between steps. Parts move from casting to machining in hours instead of weeks.
Not always. Many features can be cast to final tolerance (±0.05 mm as-cast). However, machining is typically required for threaded holes, precision bores, critical mating surfaces, or any feature where the design tolerance is tighter than what the casting process can reliably achieve.
Yes. Threaded holes and milled threads are produced as part of our in-house CNC post-processing. Because machining takes place in the same building and under the same quality system as casting, you get high precision and stable quality.
Secondary CNC machining on zinc die-cast parts can achieve tolerances significantly tighter than the ±0.05 mm as-cast standard. The achievable tolerance depends on the specific feature type, part geometry, and fixturing. We specify achievable tolerances during DFM review.
We use vibratory deburring, shot blasting, plastic media blasting, and tumbling. The process is chosen based on the customer's surface requirements and the geometry of the part.
Tell us which features need tighter tolerances and we’ll plan the machining strategy alongside the die design — before any steel is cut.
