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Geometry and parting
Review draft, split lines, undercuts, wall changes, and mould release before committing to tooling.
Sand casting
Sand casting for industrial parts.
JK Casting is a sand casting manufacturer in Gaomi, Shandong, China: we make carbon steel, grey iron and ductile iron sand castings to your drawing, including resin-coated shell moulds, supplied raw or CNC-machined. Investment casting (lost wax, i.e. precision casting) is the alternate route when the part needs finer as-cast detail. Send the drawing for a quotation.
Our sand casting foundry has been operating since 2002. Send your drawing, material and quantity for a raw or CNC-finished quotation. Carbon steel, grey iron and ductile iron are our regular material families.
Casting feasibilityTooling & core reviewRaw-part acceptance
Casting RFQReview the casting route before tooling and production release.
Casting route
Raw casting geometry sets up machining, finish, and inspection.Pattern · cores · alloy · heat treatment · machining stock · inspectionSand castingCored steel and iron geometries
Investment castingAlternate route for finer detail
Pattern & core planParting and internal passages
Casting inspectionMaterial and raw dimensions
Casting feasibility
Match the casting method to shape, alloy, quantity, and finish.
Casting cost depends on parting lines, cores, wall transitions, tooling life, and surfaces that need machining. See application requirements for heavy equipment castings and power line fittings, or review the finished-part scope for machined castings.
Compare sand casting with investment casting (lost wax, i.e. precision casting). This page keeps the sand-casting route and the choice between processes.
| Process | Typical as-cast tolerance | Reviewed for |
|---|---|---|
| Sand casting | ISO 8062 CT8-CT10, depending on part geometry | Cored steel and iron parts |
| Investment casting (lost wax, i.e. precision casting) | ISO 8062 CT5-CT7, depending on part geometry | Smaller detailed components |
CR
Core design
Confirm internal passages, core support, cleanout access, and the features most sensitive to core movement.
AL
Alloy and heat treatment
Match the specified material and treatment condition to section size, service duty, and inspection needs.
QT
Quantity and tooling
Use order quantity and repeat demand to choose a practical pattern, mould, and sampling plan.
ST
Casting tolerance and stock
Separate as-cast dimensions from machined features and reserve stock only where final control is required.
QC
Casting checks
Define material records, visual limits, dimensions, test scope, and any agreed repair criteria before release.
Sand casting services
Prepare a sand casting RFQ.
JK reviews sand casting for drawing-based industrial parts. Typical as-cast tolerance is ISO 8062 CT8-CT10, depending on part geometry. Send the finished requirement first, even if you need a raw casting quotation: material, internal geometry, machining stock and acceptance checks must be reviewed together.
New tooling or an existing pattern?
For new tooling, provide the controlled drawing and available 3D model. For a transferred pattern or core box, include photographs, identification, condition and available tooling drawings. State ownership and any transfer restrictions; suitability needs review before reuse is quoted.
Internal passages and machined features
Mark cored passages, openings, bores and datum surfaces. Identify which dimensions apply to the raw casting and which apply after machining. If the machining-stock plan is not yet defined, flag it for review rather than treating the finished drawing as the raw-casting acceptance drawing.
Quantity and acceptance
Give the sample quantity, first order and expected repeat batches separately. Specify the cast grade, treatment condition, surface acceptance and required inspection records. Agree first-sample approval before repeat production.
Compare the same supply scope
Request tooling and unit prices as separate items. Identify whether the order ends at a cleaned raw casting or includes machining, finish and inspection. Use the casting quote comparison worksheet to record inclusions and open items.
Considering investment casting (lost wax, i.e. precision casting) as well? That route is reviewed on its own page against the same drawing and quantity. A process name alone does not confirm achievable tolerance, finish or price. For the finished-part option, see raw versus machined supply requirements.
Request a sand casting quotation with your drawing revision, material and quantities.
Shell moulding
Shell mould casting with resin-coated sand
Shell mold casting, also called shell moulding or shell casting, is a sand casting process in which resin-coated sand is formed into a thin, rigid shell mould. JK’s sand casting routes include resin-coated sand shell moulds.
In shell moulding, resin-coated sand is placed on a heated metal pattern so that a thin shell cures against it. Two shell halves, with any cores, are joined to form the mould, and the metal is poured into it. After cooling, the shell is broken away and the casting is cleaned.
Compared with conventional sand moulds, shell casting gives a cleaner as-cast surface and more stable dimensions, and it suits small and medium-size parts. In the shell mold casting process, the route and the tolerance for each part are confirmed against the drawing.
Alternate casting route
Lost wax is reviewed on its own page.
Investment casting (lost wax, i.e. precision casting) is the alternate route when the drawing needs finer as-cast detail. Sand casting and the choice between the two processes stay on this page. Continue to investment casting for that process and its quotation. For a side-by-side buyer guide, see sand casting vs investment casting. What drives tooling cost and what to agree on ownership is covered in casting tooling costs.
Steel and iron casting materials
Steel casting and iron casting: specify the material as carefully as the geometry.
See the material specification guide for grade, standard, treatment condition and report requirements.
Carbon steel castings
Carbon steel castings are a regular material family for JK's drawing-based parts; see steel castings. We assess sand casting against the component geometry and required properties, or investment casting (lost wax, i.e. precision casting) when that route fits the drawing. State the cast grade, governing standard and heat-treatment condition.
Stainless steel castings
Send stainless steel component drawings for part-specific review. Include the exact cast grade, service environment, finish and required material records. Grade availability, casting route and test scope are confirmed in the quotation. If the route is investment casting (lost wax, i.e. precision casting), continue on the investment casting page.
Ductile and gray iron castings
For suitable housings, hubs, bases and supports, specify the iron grade, strength or hardness requirements and delivery condition. We review the casting and any machined interfaces together. For ductile iron, see ductile iron castings; to choose between the two, see ductile vs grey iron.
Finished machined castings
Machining is offered with the castings we supply. Mark bores, faces, threads and tolerances on the finished drawing, then review component features and RFQ requirements.
Send a casting drawing for quotation with quantity per part number, expected annual demand and delivery batches.
Casting definition before tooling
Raw casting definition
Set the casting condition before machining requirements are applied.
Raw castings need a clear definition that connects the finished drawing to pattern construction, core location, material condition, machining stock, and agreed inspection points.
✓Parting line and draft direction
✓Core locations and internal passages
✓Wall thickness and section transitions
✓Machining stock on functional surfaces
✓Alloy and heat-treatment condition
✓Visual, dimensional, and NDT acceptance
Casting workflow
The sand casting process, from feasibility review to production release.
1
RFQ & geometry review
Check alloy, section changes, parting, cores, stock, quantity, and acceptance requirements.
2
Tooling & core plan
Define pattern construction, core arrangement, gating approach, and first-sample checks.
3
First casting & correction
Inspect the initial raw casting, record deviations, and close agreed tooling corrections.
4
Production & acceptance
Control material, casting condition, dimensions, testing, preservation, and packing.
Casting records
Evidence buyers can approve before repeat production.
Keep the raw-casting requirement, material condition, sample result, and acceptance criteria in one traceable production record.
Raw casting drawing
Identify parting, cores, casting dimensions, machining stock, and revision status.
Material and heat treatment
Record the agreed grade, condition, reports, and project-specific testing scope.
First-article results
Compare the first casting with agreed dimensions and close tooling corrections before repeat work.
Acceptance and repair criteria
Define visual, dimensional, NDT, and repair requirements instead of deciding them after production.
Sand casting buyers
Typical sand casting components, and what to send.
Sand casting is the route for cored housings, hubs, brackets and clamp bodies made to your drawing. Investment casting (lost wax, i.e. precision casting) is the other route, used when the drawing needs finer as-cast detail. JK’s sand casting routes include resin-coated sand shell moulds for parts that need a cleaner surface and closer tolerance than conventional sand moulds.
Parts buyers send
Housings, hubs and brackets for construction equipment and agricultural machinery. Bearing housings and bases for industrial machinery. Clevis and clamp bodies for power line hardware. Cable-protector bodies for oilfield equipment. Bucket teeth stay on the construction equipment page and are quoted from a drawing or sample.
Where the parts are used
OEM production, a second source, or a replacement from a drawing or worn sample. These are made-to-order parts. A similar photograph is not a stock item.
What to send
✓Drawing or 3D file, with the revision
✓Material grade and standard
✓Quantity, and any repeat demand
✓Tolerances on the fit surfaces
✓Surface or heat-treatment requirement
Capability boundaries
Two processes only: sand casting and investment casting (lost wax, i.e. precision casting). Die casting is not offered. There is no fixed upper part-weight limit. Inspection equipment is in-house. Heat treatment and galvanizing are arranged to agreed specifications. Welded fabrications and stamped parts are quoted with castings or as separate orders. Standalone machining-only orders are outside the supply scope. Lead time is confirmed in each quotation according to quantity and complexity. The ISO 9001:2015 certificate covers the processing of steel castings.
Frequently asked questions
Casting questions before tooling release.
Final requirements should be tied to the drawing, material specification, purchase order, and approved casting record.
Can you quote casting only?
Yes. The quotation can cover raw castings only or add heat treatment, machining, finishing, inspection, and export packing as defined items.
How do you choose sand or investment casting?
The decision depends on alloy, size, wall thickness, internal geometry, detail, quantity, surface expectation, and tooling economics. Sand casting stays on this page. Investment casting (lost wax, i.e. precision casting) is the alternate route.
Can you review a sample or worn part?
Yes. A sample can start feasibility review, but material, critical dimensions, quantity, and acceptance requirements still need confirmation.
What should a casting RFQ include?
Send the drawing or model, material grade, quantity, annual demand, machined surfaces, treatment, test scope, and delivery requirements.
Which casting processes does JK Casting use?
Casting processes are sand casting and investment casting (lost wax, i.e. precision casting). CNC machining of those castings is done in-house.
How do sand casting and investment casting compare?
Sand casting is typically held to ISO 8062 CT8-CT10, depending on part geometry. Investment casting (lost wax, i.e. precision casting) is typically held to ISO 8062 CT5-CT7, depending on part geometry. The route is chosen from the drawing, material and quantity, and the tolerance for your part is confirmed against the drawing. Sand casting is covered on this page. The investment casting route is covered on the investment casting page.
What should I send for a sand casting quotation?
Send the drawing, material grade, quantity, the tolerances on fit surfaces, and any surface or heat-treatment requirement. Heat treatment and galvanizing are arranged to agreed specifications. Lead time is confirmed in each quotation according to quantity, part complexity and whether new tooling is needed.
Is there a fixed upper weight limit for a sand casting?
There is no fixed upper part-weight limit. Each casting is reviewed from its drawing, and the process, tooling and price are quoted per part.
What materials do you sand cast?
Carbon steel, grey iron and ductile iron are JK Casting’s regular sand-cast materials. Stainless steel and alloy steel drawings are reviewed part by part. Die casting is not offered.
Do you offer shell mould casting?
Yes. JK’s sand casting routes include resin-coated sand shell moulds. Compared with conventional sand moulds, they give a cleaner as-cast surface and more stable dimensions, and they suit small and medium-size parts. The process and tolerance for each part are confirmed against the drawing.
Can shell mould castings be supplied with machined interfaces?
Yes. Parts made in resin-coated sand shell moulds can be CNC-machined after casting, for example bores, faces and threaded holes, to the drawing. The shell route and the machining scope are confirmed for each drawing.
Casting RFQ
Send the casting drawing, material, quantity, and finishing scope.
Share the strongest part evidence available. We will review geometry, cores, alloy, tooling, stock, treatment, inspection, and the practical quotation route.
Explore the investment-casting route
Review the process overview, then use the carbon steel page to define the material, machining and batch requirements for a comparable quotation.