Machined Castings
JK Casting supplies raw castings and precision machined castings from Gaomi, including cast iron CNC machined parts and machined steel castings. The casting factory has been operating since 2002. Choose an as-cast quotation for your machining line or a finished-part quotation covering the machining on your drawing.
Send the finished drawing, material and order quantities. We review the production route, machining allowance, critical fits and inspection before quotation.
For construction equipment castings and industrial machinery components, define the faces, bores, holes, and assembly surfaces to be machined. Include initial and repeat quantities so the casting and machining route can be priced together.
Drawings are checked for stock allowance, datum surfaces, tolerance bands, and features that must stay stable after casting and finishing.
Critical dimensions, thread checks, hole patterns, surface finish, and packing protection can be defined as shipment checkpoints.
Machined casting product examples
These existing product-gallery references show geometry and finished interfaces. They do not establish a material grade, casting process or completed customer order. Your drawing defines the part and the agreed supply condition.
Where this route fits
The cast blank provides the main geometry; CNC machining finishes the bores, faces and threads needed for assembly or sealing. Define those interfaces on the finished drawing.
Compare the supply scope
Plan casting and machining as one finished-part process. Use the same part number, drawing revision, material and quantities when requesting both options. The key difference is which features JK supplies complete and which operations remain with your machining team.
The finished and raw drawings should share revision control, functional references, stock assumptions, treatment condition, and inspection gates so each stage protects the next.
For iron components, start with the ductile and gray iron material requirements. The casting route and achievable tolerances are confirmed for your drawing.
Manufacturing review
Material grade, casting route, heat treatment, and expected surface condition are reviewed against part size, geometry, and working environment.
Extra stock must be planned on the right features so machining can remove casting variation without weakening the finished part.
Drawings should identify which dimensions are functional, which surfaces act as datums, and which tolerances need inspection reporting.
Painting, galvanizing, powder coating, plating, or anti-rust protection may change masking, finishing, packing, and inspection requirements.
Machined casting RFQ package
A good RFQ separates rough cast geometry from finished machined features. Use the housing and interface worksheet to record bearing fits, datums and sealing faces. That helps us judge the route, machining sequence, dimensional inspection plan, and export packing before quoting.
Machining scope
A process plan starts with functional datums and inspection access, then assigns the required operations. Our in-house machining completes drawing-based casting orders. The quotation covers the casting and required machining together.
Control diameters, shoulders, grooves, faces, and concentric features around a stable rotational datum.
Machine mounting faces, slots, pockets, profiles, and hole patterns from defined setup references.
Finish bearing seats, aligned bores, sealing diameters, and other internal features that control fit.
Define hole position, depth, thread specification, entry condition, and inspection before production.
Datum & tolerance review
The machining plan should show how the part is located, which features share a setup, where distortion may occur, and how each critical requirement will be inspected.
Machined Castings FAQ
Yes. Send the full drawing package and mark the machined surfaces, tolerances, and inspection requirements so the casting and machining route can be reviewed together.
Material, casting weight, machining allowance, tolerance level, number of setups, fixture difficulty, surface treatment, inspection reports, packing, quantity, and sample approval all affect quotation.
Photos and samples can start the discussion, but quotation needs confirmed dimensions, material, quantity, critical features, and inspection expectations.
Yes, for the castings we supply: gray iron, ductile iron and steel castings can be quoted with CNC turning, milling, boring and drilling. Standalone machining of customer-supplied stock or third-party castings is outside our scope. The machining route, achievable tolerances, and inspection requirements are confirmed for each part before quotation.
We review each tolerance with its datum, feature size, tool access, setup sequence, material condition, and measurement method.
It is useful when raw casting geometry, heat treatment, machining stock, datums, finishing, and inspection affect one another.
Raw and finished drawings, tooling corrections, stock, fixtures, and inspection plans should remain linked by controlled revisions.
Yes. Ductile iron castings in grades QT400 to QT600 (QT400-15, QT450-10, QT500-7, QT600-3 and their EN-GJS and ASTM A536 equivalents) are sand cast and CNC-machined to the drawing: turning, milling, boring and drilling. Raw-casting and machined-part prices can be quoted separately.
Send drawings, 3D files, material, quantity, machined features, tolerances, surface treatment, and inspection expectations for a practical review.
