Precise hollow dies for round, oval and multi-bore tube profiles — porthole and spider designs with centred mandrel and sound welds.
Tube and round profiles require a balanced central mandrel. From thin-wall tubes to multi-bore sleeves, KALEKS uses porthole and spider die designs to control wall-thickness tolerance and roundness (ovality).
For uniform walls, metal flow is balanced via port sections and bearing lengths; flow analysis yields a smooth surface and sound weld seam on the circular section.
Yes, we design porthole/spider dies for thin-wall and multi-bore tube profiles.
With mandrel centring, balanced port design and bearing work we keep ovality to a minimum.
Share your profile drawing (DWG/DXF/PDF) or sample; our team will respond with feasibility, die layout and lead time.
Request a Quote