Skip to content
Request a Quote
Precision Casting Parts

Investment-Cast Bronze Bushings & Fittings

Investment-cast bronze bushings and fittings, with close tolerances and a fine surface finish from the lost-wax process.

Part weight5 g – 15 kg
Dimensional±0.05 mm general (to print); ±0.02 mm on critical features
SurfaceShot blasted, tumbled, passivated or electropolished
Investment-cast bronze bushings, fittings and bearing housings
About this part

What it is and why it is made that way

Bronze is the classic bearing material, and the lost-wax process holds the small dimensions that bronze parts depend on — the bore of a bushing has to be accurate or it will not take a shaft. The casting is machined after the pour, so the tolerance comes from the machining rather than from the mould.

  • Lost-wax process holds the fine detail in small parts
  • Bore machined after casting to the specified fit
  • Bronze grades CuSn10 and CuZn37, with material certificate
  • Machined and polished surfaces available

Materials

  • Stainless 304 / 316L
  • Carbon steel 1045 / 4140
  • Alloy steel 17-4PH
  • Bronze and brass (CuSn10, CuZn37)
  • Aluminium A356

Production processes

  • Investment casting (lost wax)
  • Lost-wax casting
  • Shell moulding
  • Deburring and shot blasting
  • CNC finish machining

Typical applications

  • Plain bearings and bushings
  • Bronze pipe fittings
  • Pump and valve components
  • Marine and chemical service
Specification

Technical detail

The ranges below are what this shop typically holds. Anything tighter than the baseline is possible — send the drawing and we will confirm it against your specific tolerances rather than quote from a table.

Part weight5 g – 15 kg
Dimensional±0.05 mm general (to print); ±0.02 mm on critical features
SurfaceShot blasted, tumbled, passivated or electropolished
Porosity≤1% gas porosity on critical surfaces, to agreed specification
InspectionX-ray and dye penetrant testing available on request
BoreH7, machined after casting
Bronze gradeCuSn10 / CuZn37, to specification
Part weight5 g – 8 kg
Material and finish are yours to choose. The lists above are the families this part is normally made in. We will not substitute a grade or change a tolerance without telling you first — and asking.
In the same process line

Other Precision Casting parts

If this is not quite your part, these are made on the same equipment with the same inspection.

View all Precision Casting parts

Get a quote for this part

Send the drawing and we will quote it against your material, your tolerance and your quantity. One business day, in writing, with a lead time you can plan around.

Request a Quote

Request a quote

Send a drawing and we will quote it against your material, tolerance and quantity. A description of what the part has to do is enough to start.

We reply within one business day. Your details are used to answer this enquiry and nothing else.
Prefer to write directly?info@cma-nj.com+86-25-83784843