Centrifugal casting
Centrifugal casting is a process in which molten metal is poured into a rotating mould, and centrifugal force presses the metal against the mould wall while it solidifies. It produces dense, rotationally symmetric parts such as bushings, rings, cylinder liners and tubes, mainly in bronze, cast iron and steel.
Request a quoteAt a glance
Typical parts
- Plain bearing bushings and sleeves
- Worm wheel rims and gear blanks
- Cylinder liners
- Rings, flanges and seal rings
- Tubes and rollers
Inspection
- Chemical analysis of each heat by spectrometer
- Hardness or tensile tests on test pieces
- Visual check and PT after machining
- UT where specified
Documents
- EN 10204 3.1 certificate
- Dimensional report
How centrifugal casting works
A cylindrical metal mould is rotated at high speed while molten metal is poured in. Centrifugal force distributes the metal evenly against the mould wall, where it solidifies from the outside in. No core is needed for the bore. Impurities and gas collect at the inner surface, which is removed by machining.
Horizontal centrifugal casting is used for long tubes and liners, vertical centrifugal casting for rings and short, wide parts.
Quality checks and documents for centrifugal castings
Chemical composition is checked by spectrometer for each heat, and hardness or tensile properties on test pieces. Castings are checked visually and by penetrant testing (PT) after machining, and by ultrasonic testing (UT) where the specification requires it.
Standard documents are a material certificate to EN 10204 3.1 and a dimensional report. More on the quality page.
Materials for centrifugal casting
Tin bronze
EN 1982
- CuSn12-C-GZ
- CuSn12Ni2-C-GZ
- CuSn10-C-GZ
Aluminium bronze
EN 1982
- CuAl10Fe5Ni5-C-GZ
Gunmetal
EN 1982
- CuSn7Zn4Pb7-C-GZ
Grey and ductile iron
EN 1561, EN 1563
- EN-GJL-250
- EN-GJS-500-7
There is no fixed size or weight limit. Send us your drawing and we will define the right production route for the part and confirm feasibility.
Is this the right process?
When centrifugal casting is the right choice
- The part is rotationally symmetric: a bushing, ring, sleeve or tube
- A dense, sound structure is needed in the wear or load zone
- The bore would otherwise need a core or be machined from solid
When another process is better
- Small bushings in long series: continuous cast tubes or bars can be cheaper as starting material
- Parts that are not rotationally symmetric: sand casting or investment casting
- Highly loaded steel rings: ring rolling under forging gives higher strength
Related pages
- CNC turningCNC turned parts in steel, stainless steel, aluminium and brass from machine shops in Türkiye: shafts, pins, bushings and flanges, with dimensional reports.
- Machinery and equipmentMachine bases, housings, shafts, gear blanks, guides and plastic wear parts for machinery and equipment manufacturers, produced by manufacturers in Türkiye.
- Energy and infrastructureFlanges, rolled rings, shafts, bearing and gearbox housings, valve and pump parts for energy and infrastructure equipment, from manufacturers in Türkiye.
- Other industriesCast, forged, machined and plastic parts for pumps and valves, hydraulics, rail, material handling, industrial automation, robotics and marine equipment.
Frequently asked questions
Why are centrifugal castings used for bushings and worm wheels?
Centrifugal force pushes the heavier metal outward and lighter impurities and gas inward, where they are machined away. The result is a dense, fine-grained structure in the working zone, which gives good wear resistance and load capacity for bearing bronzes.
What is the difference between horizontal and vertical centrifugal casting?
Horizontal machines rotate the mould around a horizontal axis and are used for long parts such as tubes and liners. Vertical machines are used for shorter parts with a larger diameter, such as rings, flanges and worm wheel rims.
Which bronze is used for worm wheels?
Tin bronzes such as CuSn12-C and CuSn12Ni2-C are common for worm wheel rims because of their wear resistance and sliding properties. In EN 1982 the suffix GZ marks a centrifugal casting, for example CuSn12-C-GZ.
Send your drawing. You get a quotation in 3 to 5 working days.
Your drawings are handled confidentially; NDA on request.