Injection Molding
Tooling and molding for your repeat plastic parts.
C90300 Tin Bronze Machining for Your Functional Parts
For your C90300 machining project, connect the casting route to the finished bore, hub and port geometry. Review custom C90300 parts around the actual mating components and the evidence your receiving team needs.
UNS C90300Tin-bronze cast-alloy reference.
Sn 7.5–9.0%Selected continuous-cast chemistry.
CuSn8Zn4Supplier name; no automatic EN equivalence.
Your Functional DatumConnect bore, hub and mounting face.
Identify Your C90300 Casting Before Selecting the Route
For your C90300 tin bronze callout, identify product standard, casting method and supplied state. C90300 bronze properties and C90300 hardness need the actual product and test basis; a reference datasheet does not establish finished assembly performance.
Selected C90300 Chemical Composition
| Element | Concast continuous-cast reference · wt.% |
|---|---|
| Copper | 86.0–89.0 |
| Tin | 7.5–9.0 |
| Zinc | 3.0–5.0 |
| Lead | ≤0.30 |
| Iron | ≤0.20 |
| Phosphorus | ≤1.50 |
| Nickel · includes Co | ≤1.00 |
| Aluminum / Silicon | ≤0.005 each |
| Sulfur / Antimony | ≤0.05 / ≤0.20 |
Selected ASTM B505/B505M-23 reference. Cu minimum may be calculated as Cu + Ni; combined Cu + named elements ≥99.4% is not pure-copper content. The P limit here belongs to the selected continuous-cast product; do not transfer it to every casting route.
Your Drawing and European Purchasing Name
| Your reference | What to approve |
|---|---|
| UNS C90300 | Exact product standard, ordered revision and casting route. |
| CuSn8Zn4 | KMM supplier directory name associated with C90300. |
| European numeric designation | No EN number is assigned to this row in the cited directory; retain the full approved specification. |
| Machined or functional acceptance | Specify final geometry and any separate balance, leak, pressure or wear test. |
Compare Before Substitution
Do not relabel C90300 as CuSn10-C / CC480K. Compare complete chemistry, product requirements and casting route before approving any alternative.
Compare Chemistry Separately from the Machining Index
Selected Tin Ranges · wt.%
Common scale 0–10
C90300
7.5–9
C93200
6.3–7.5
0510
Indicative Machinability · brass = 100
Common scale 0–100
C90300
30
C93200
70
C95400
60
050100
Selected Concast continuous-cast references. Chemistry intervals and cutting indices do not rank finished bearing life, gear capacity or pressure performance. These are reference charts, not your material-lot analysis or machining-time ratios.
Concast C90300 ↗ Concast C93200 ↗ Concast C95400 ↗ KMM CuSn8Zn4 directory ↗
Connect Your C90300 Part to Its Functional Interface
Choose the component and review the route before repeating quantities.
Define Your Bushings
For your C90300 bushings, define the shaft and housing relationship and whether the final bore is accepted free or installed. Review custom C90300 bushings using a controlled drawing and mating details.
| Your decision | What to define |
|---|---|
| Your fit | Bore, housing restraint, flange datum and lubrication access. |
| Your route | Casting method, stock, support and final operations. |
| Your approval | Finished dimensions, surface and required evidence. |
Review Your Support and Tool Access
For C90300 CNC machining, agree locating support, usable stock and access to the final datum. Keep any subsequent operation within the agreed scope.
| Your decision | What to define |
|---|---|
| Your fit | Bore, housing restraint, flange datum and lubrication access. |
| Your route | Casting method, stock, support and final operations. |
| Your approval | Finished dimensions, surface and required evidence. |
Confirm Your Casting and Allowance
Specify the actual stock route, usable allowance and material acceptance. Do not assume every product form has identical properties.
| Your decision | What to define |
|---|---|
| Your fit | Bore, housing restraint, flange datum and lubrication access. |
| Your route | Casting method, stock, support and final operations. |
| Your approval | Finished dimensions, surface and required evidence. |
Agree Your Finished-Part Evidence
Define final geometry, accepted edges and sampling. Material documents, dimensional inspection and functional tests answer separate questions.
| Your decision | What to define |
|---|---|
| Your fit | Bore, housing restraint, flange datum and lubrication access. |
| Your route | Casting method, stock, support and final operations. |
| Your approval | Finished dimensions, surface and required evidence. |
Define Your Gear Blanks
For your C90300 gear blanks, agree the blank scope and the requirements reserved for subsequent gear cutting. A machined blank is not a finished gear rating. Review custom C90300 gear blanks using a controlled drawing and mating details.
| Your decision | What to define |
|---|---|
| Your fit | Hub bore, face datum, blank dimensions and later tooth-cutting allowance. |
| Your route | Casting method, stock, support and final operations. |
| Your approval | Finished dimensions, surface and required evidence. |
Review Your Support and Tool Access
For C90300 CNC machining, agree locating support, usable stock and access to the final datum. Keep any subsequent operation within the agreed scope.
| Your decision | What to define |
|---|---|
| Your fit | Hub bore, face datum, blank dimensions and later tooth-cutting allowance. |
| Your route | Casting method, stock, support and final operations. |
| Your approval | Finished dimensions, surface and required evidence. |
Confirm Your Casting and Allowance
Specify the actual stock route, usable allowance and material acceptance. Do not assume every product form has identical properties.
| Your decision | What to define |
|---|---|
| Your fit | Hub bore, face datum, blank dimensions and later tooth-cutting allowance. |
| Your route | Casting method, stock, support and final operations. |
| Your approval | Finished dimensions, surface and required evidence. |
Agree Your Finished-Part Evidence
Define final geometry, accepted edges and sampling. Material documents, dimensional inspection and functional tests answer separate questions.
| Your decision | What to define |
|---|---|
| Your fit | Hub bore, face datum, blank dimensions and later tooth-cutting allowance. |
| Your route | Casting method, stock, support and final operations. |
| Your approval | Finished dimensions, surface and required evidence. |
Define Your Pump Impellers
For your C90300 pump impellers, connect machined hub geometry to the actual pump assembly. Define any required balance or functional test separately. Review custom C90300 pump impellers using a controlled drawing and mating details.
| Your decision | What to define |
|---|---|
| Your fit | Hub bore, rear datum, vane clearances and mounting relationship. |
| Your route | Casting method, stock, support and final operations. |
| Your approval | Finished dimensions, surface and required evidence. |
Review Your Support and Tool Access
For C90300 CNC machining, agree locating support, usable stock and access to the final datum. Keep any subsequent operation within the agreed scope.
| Your decision | What to define |
|---|---|
| Your fit | Hub bore, rear datum, vane clearances and mounting relationship. |
| Your route | Casting method, stock, support and final operations. |
| Your approval | Finished dimensions, surface and required evidence. |
Confirm Your Casting and Allowance
Specify the actual stock route, usable allowance and material acceptance. Do not assume every product form has identical properties.
| Your decision | What to define |
|---|---|
| Your fit | Hub bore, rear datum, vane clearances and mounting relationship. |
| Your route | Casting method, stock, support and final operations. |
| Your approval | Finished dimensions, surface and required evidence. |
Agree Your Finished-Part Evidence
Define final geometry, accepted edges and sampling. Material documents, dimensional inspection and functional tests answer separate questions.
| Your decision | What to define |
|---|---|
| Your fit | Hub bore, rear datum, vane clearances and mounting relationship. |
| Your route | Casting method, stock, support and final operations. |
| Your approval | Finished dimensions, surface and required evidence. |
Define Your Valve Bodies
For your C90300 valve bodies, agree port relationships and final sealing or locating geometry. Pressure and leak acceptance need an explicit procedure. Review custom C90300 valve bodies using a controlled drawing and mating details.
| Your decision | What to define |
|---|---|
| Your fit | Port threads, bonnet datum, mounting foot and inspection access. |
| Your route | Casting method, stock, support and final operations. |
| Your approval | Finished dimensions, surface and required evidence. |
Review Your Support and Tool Access
For C90300 CNC machining, agree locating support, usable stock and access to the final datum. Keep any subsequent operation within the agreed scope.
| Your decision | What to define |
|---|---|
| Your fit | Port threads, bonnet datum, mounting foot and inspection access. |
| Your route | Casting method, stock, support and final operations. |
| Your approval | Finished dimensions, surface and required evidence. |
Confirm Your Casting and Allowance
Specify the actual stock route, usable allowance and material acceptance. Do not assume every product form has identical properties.
| Your decision | What to define |
|---|---|
| Your fit | Port threads, bonnet datum, mounting foot and inspection access. |
| Your route | Casting method, stock, support and final operations. |
| Your approval | Finished dimensions, surface and required evidence. |
Agree Your Finished-Part Evidence
Define final geometry, accepted edges and sampling. Material documents, dimensional inspection and functional tests answer separate questions.
| Your decision | What to define |
|---|---|
| Your fit | Port threads, bonnet datum, mounting foot and inspection access. |
| Your route | Casting method, stock, support and final operations. |
| Your approval | Finished dimensions, surface and required evidence. |
Resolve 6 Drawing Decisions Before Your First Route Sample
Keep Your Casting Route Traceable
For C90300 machining services, confirm ordered standard, revision, casting route and usable stock. Retain material-lot identity through the machined component.
01 · Requirement
Define the working datum and mating part.
02 · Route
Agree stock, support and final surface.
03 · Evidence
Inspect the agreed final state.
Confirm stockMachineFinish if specifiedInspect
Define the Full Bore and Port Relationship
For C90300 boring and C90300 threading, show bore length, port intersections, accepted exits and the gauge or inspection access needed.
01 · Requirement
Define the working datum and mating part.
02 · Route
Agree stock, support and final surface.
03 · Evidence
Inspect the agreed final state.
Confirm stockMachineFinish if specifiedInspect
Review the Actual Starting Product
Identify supplied stock, machining allowance and final required condition. Do not apply a continuous-cast reference to an unspecified casting route.
01 · Requirement
Define the working datum and mating part.
02 · Route
Agree stock, support and final surface.
03 · Evidence
Inspect the agreed final state.
Confirm stockMachineFinish if specifiedInspect
Preserve the Working Geometry
Show allowable edge breaks, vane roots and tool access. Accepted edges must retain the actual operating clearance and mounting relationship.
01 · Requirement
Define the working datum and mating part.
02 · Route
Agree stock, support and final surface.
03 · Evidence
Inspect the agreed final state.
Confirm stockMachineFinish if specifiedInspect
Specify Your Contact and Environment
Define roughness, cleaning, masking, mating material and operating medium. Agree any coating or exposure test separately.
01 · Requirement
Define the working datum and mating part.
02 · Route
Agree stock, support and final surface.
03 · Evidence
Inspect the agreed final state.
Confirm stockMachineFinish if specifiedInspect
Measure the State Your Assembly Uses
For the finished bore, identify free or installed measurement and support. Any wear, balance, leak or pressure test requires its own method and limits.
01 · Requirement
Define the working datum and mating part.
02 · Route
Agree stock, support and final surface.
03 · Evidence
Inspect the agreed final state.
Confirm stockMachineFinish if specifiedInspect
From Your C90300 Stock to the Finished Functional Datum
Your C90300 machined parts manufacturer review should connect material, operations and inspection to one controlled drawing.
C90300 Turning & Boring
Review supported bore length, flange and shoulder relationships.
Review the Process →
Hub & Working-Land Review
Separate hub machining from vane geometry and functional acceptance.
Review the Process →Check Your C90300 Part at 3 Stages
01 · Material
Casting identity and ordered requirements.
02 · Sample
Complete route and locating features.
03 · Release
Final interfaces and receiving evidence.
Verify the Ordered Casting Product
For your C90300 material certification, state the ordered standard, revision, casting route, lot identity and certificate contents.
- Exact material, product and supplied state.
- Controlled datums, accepted edges and surfaces.
- Agreed evidence, sampling and test scope.
Approve Your Blank and Locating Datum
Check complete first-sample geometry and usable allowance for any subsequent operation before repeating the route.
- Exact material, product and supplied state.
- Controlled datums, accepted edges and surfaces.
- Agreed evidence, sampling and test scope.
Check Your Finished Working Interface
Inspect the accepted mounting, bore, hub or port geometry. Keep dimensional evidence separate from any functional test.
- Exact material, product and supplied state.
- Controlled datums, accepted edges and surfaces.
- Agreed evidence, sampling and test scope.
Match Protected Parts to Their Records
For your C90300 machined parts, agree individual protection, lot identity, material documents and final inspection scope.
- Exact material, product and supplied state.
- Controlled datums, accepted edges and surfaces.
- Agreed evidence, sampling and test scope.
Compare the Same Final Requirement
| Your check | What to approve |
|---|---|
| Continuous or other casting route | Exact standard, material evidence and supplied state. |
| Machined blank or finished gear | Define later tooth-cutting scope and separate final acceptance. |
| Bore and installed fit | Agree mating parts, support and measurement state. |
| CuSn8Zn4 reference | Retain full approved requirements; no automatic EN number assigned here. |
The material name does not establish a universal operating clearance, balance grade or pressure rating.
Bronze Alloy Overview →Protect Your Machined Contact Surfaces
Agree accepted marks, cleanliness, edge condition and individual protection. Review any coating against the final mating fit.
Surface Finishing →
Coordinate Your Drawing and Receiving Requirements
Connect China manufacturing with Dallas-area coordination for drawing review, sample decisions and delivery requirements.
6 Inputs for Your C90300 Quote
01CAD + controlled drawing + mating parts
02C90300 + ordered product standard and revision
03Casting route + supplied state + usable allowance
04First order + repeat quantities
05Bore + hub + port + working-surface requirements
06Records + inspection state + separate test scope
Compare Your Quote on the Same Basis
Your C90300 machining quote should compare the same stock route, drawing revision, final interface and receiving requirements.
Answers Before You Specify C90300
What is C90300 bronze?
C90300 is a cast tin-bronze designation. Specify the product standard and casting route, then define the finished bore, hub, port or mounting interface.
Is C90300 difficult to machine?
For C90300 machinability, selected Concast data gives an indicative index of 30. It does not predict your cycle time, tool life or quote cost; review actual stock, geometry and finish.
What information is needed for a C90300 machining quote?
Provide CAD and controlled drawing, exact product specification and casting route, stock dimensions, quantities, mating parts, surfaces and receiving evidence.
What tolerances can be achieved machining C90300?
State feature limits, datums and free or installed acceptance. Your quote confirms reviewed geometry and inspection scope; no universal tolerance is promised.
How to specify C90300 material certification?
Identify the ordered product standard and revision, casting route, supplied state, lot identity and required certificate contents. Keep material and dimensional evidence separate.
Does a C90300 gear blank include finished gear acceptance?
Define blank scope, tooth-cutting allowance and any later operation. A material designation and a machined blank do not establish final tooth quality or gear capacity.
Do pump impellers and valve bodies need separate functional tests?
Agree any balance, leak, pressure or flow procedure and its acceptance limits before ordering. Material identity and dimensional checks alone do not establish those results.
What European name should your purchasing team review?
KMM lists CuSn8Zn4 with C90300 and leaves the European numeric reference unassigned. Retain the complete approved specification; do not assume CuSn10-C / CC480K is the same material.
