Primary process: Investment Casting. The full route, materials, tolerances and design tips for a prosthetic joint, with an indicative cost.
Investment CastingPrimary process
CastingFamily
8Route steps
+/-0.2mmTypical tol.
A prosthetic joint is primarily made by Investment Casting. Investment casting builds a wax pattern, coats it in a ceramic shell, melts the wax out, then pours metal into the cavity. It gives near-net shape with fine detail. Below is the full route to make a prosthetic joint, the materials it suits, the tolerances to expect and the main design points. The route is free, from the finder.
Step by step
How a prosthetic joint is made
The usual route, raw material to finished part. The amber step is where the prosthetic joint gets its basic shape.
Alloy and tooling
Choose the casting alloy for the prosthetic joint and make the pattern or metal die that forms the cavity.
Investment Casting
Melt the metal and pour it into the mould, then let the prosthetic joint solidify and cool.
Tooling Medium to high Tolerance ±0.1 to 0.5mm Lead 3 to 8 weeks
Fettling and cleaning
Cut off the gates and risers, grind away the flash, and clean the raw casting.
Machining
Machine the mating faces, bores and datum surfaces to final tolerance: the as-cast surface is too rough for close fits.
Tooling None Tolerance ±0.125mm, to ±0.025mm Lead 1 to 10 days
Hole making
Drill, ream and tap the fixing and functional holes.
Tooling None Tolerance ±0.05 to 0.2mm Lead hours to days
Heat treatment
Stress-relieve or harden the prosthetic joint to reach the strength and hardness the design needs.
Tooling n/a Tolerance can distort Lead days
Surface finish
Plate, anodise or powder coat for corrosion resistance and appearance.
Tooling Low Tolerance adds 0.05 to 0.2mm Lead days
Inspection
Check critical dimensions and, for any part that holds pressure, leak-test before it ships.
Need the real cost for a prosthetic joint? The free route above is yours. Unlock the full dossier to quote and source it.
Where this process typically lands. Tighter is possible with extra operations like grinding, at higher cost.
Materials
Materials for a prosthetic joint
Grade
Why it suits this
Stainless 17-4PH / 316
Strong, corrosion resistant
Carbon/alloy steel
Strong, cheaper
Superalloy (Inconel)
High-temp
Design
Design tips
General pointers. The full design-for-manufacturing list for a prosthetic joint is in the dossier.
Isolated heavy sections.Core out or add feeders.
Tight tolerance left as-cast.Add a machining stock face.
Cost
What a prosthetic joint should cost
Near-net and great finish, so it saves machining on complex parts; the wax die is the cost to amortise.
PER-PART COST vs VOLUME
Per-part cost drops as volume spreads tooling and setup over more parts. The exact figures for a prosthetic joint at your volume, in your currency, are in the dossier.
MODEL EST.
$360 to 1005per part at 1 off
A rough ballpark only. The dossier gives should-cost at your exact volume and currency, with the full breakdown.
GET THE FULL DOSSIER
Everything you need to quote and source it
The free route above is yours. To actually put a number on a prosthetic joint and buy it well:
Should-cost at your exact volume in 12 currencies, with the material, processing, tooling and overhead breakdown
Who to source from, typical MOQ and lead time, and the exact RFQ checklist to send
A quote checker that tells you if a supplier quote is fair, and the red flags to watch
SistematikWork is a whole IE platform. Past the free finder, there are 41 ready Excel calculators, templates and CAD guides, each built from real coursework and checked against known values.
Manufacturing & OperationsQuality & ReliabilitySupply ChainProject & StatisticsEngineering Career
A prosthetic joint is primarily made by investment casting. The route is: Alloy and tooling; Investment Casting; Fettling and cleaning; Machining; Hole making; Heat treatment; Surface finish; Inspection.
What does a prosthetic joint cost?
It depends on size, tolerance and volume. As a rough ballpark it starts around $360 to 1005 per part at 1 off and falls with quantity. The dossier gives should-cost at your exact volume and currency. A model estimate, not a quote.
What material is a prosthetic joint made from?
Common choices are Stainless 17-4PH / 316; Carbon/alloy steel; Superalloy (Inconel).
What is the main process for a prosthetic joint?
Investment Casting. Complex, detailed metal parts needing a good finish and tight tolerances, including superalloys and turbine hardware.
See the exact route and should-cost for your part
The free finder maps your part to its process and full route. Pro adds should-cost at your volume, sourcing and an RFQ draft.
