Custom Iron Castings with CNC Machining

02A CLEARER CASTING PURCHASE

One factory scope from cast body to finished part

Relia Casting is the manufacturing brand of Qingdao Relia Industries Co., Ltd. We produce sand castings and machined components for overseas B2B buyers. Our machinery offering includes HT200, HT250 and QT500-7, drawing-based OEM/ODM work, anti-rust primer and a customizable top coat. The documented machinery-part scope includes 100% CMM inspection with a dimensional report, and material documentation is available as a mill certificate or EN 10204 3.1. Resin-coated sand and shell molding are our main molding routes; we select the route for each drawing instead of treating every iron part as the same job. You can request real workshop and equipment photographs alongside the part-specific dimensional and material reports.

03A CLEARER CASTING PURCHASE

Choose the iron for the component’s working duty

The housing shape does not decide its material. HT200 and HT250 are the listed grey-iron choices; QT500-7 is the listed ductile-iron choice. We keep the grade selection tied to the design duty and required supplied condition, so a change intended to reduce cost does not quietly change the component’s mechanical requirements. Our machinery listing gives HB 170–240 for the selected component condition. Use that reference where the design calls for it, with a named test location and acceptance condition. The material document and any required test results provide the wider evidence that a single hardness reading cannot replace.

04A CLEARER CASTING PURCHASE

Make the bore and mounting face work together

A shaft seat can be the correct diameter yet point in the wrong direction relative to the mounting face. That is why the finished drawing needs to describe the relationship, not just separate sizes. For a ribbed housing, identify the face that locates the part, the bore axis that locates the shaft and the holes that hold those interfaces together. Our machining plan then has a clear purpose: create a stable reference and retain that relationship through later setups. If the part has a sealing face beside painted walls, give the coating boundary the same attention as the machining boundary.

Bore

Size and axis relationship

Mounting face

Location, orientation and contact

Coating edge

Keep fitted surfaces usable

06A CLEARER CASTING PURCHASE

Turn dimensional reporting into an assembly check

Relia’s documented machinery-part offering includes 100% CMM inspection with a dimensional report. For your housing, the useful report follows the same datum structure as the drawing and separates bore size, axis location, face orientation and hole position. That lets your receiving engineer see the assembly relationships instead of a collection of unrelated readings. The pictured bore check represents one useful feature check; it does not stand in for every CMM result. For a close acceptance limit, agree a measurement approach with uncertainty suited to that decision, then retain the actual reported values with the component identity.

Drawing

Number the controlled characteristics

Measurement

Use the intended datum alignment

Output

Report actual values against the limits

08A CLEARER CASTING PURCHASE

Use the sample to settle the repeat-production baseline

Our new-part sequence is drawing review, sample manufacture and inspection, customer confirmation, then batch production. For this iron housing, sample approval should settle the working interfaces as well as the cast appearance. Your team checks the assembly fit while the dimensional and material records explain the supplied component. If development changes a hole location or the coating boundary, incorporate that approved change into the production definition. The result is a repeat order based on a released part, with any temporary concession kept separate from the permanent design.

09A CLEARER CASTING PURCHASE

Deliver the fitted surfaces ready for your next operation

Our machinery scope includes anti-rust primer and a top coat in your selected color. The useful distinction is between painted cast walls and the bore or face your assembly will actually use. Set masking, removable protection and the required receiving condition around those surfaces. Inside the package, supports should carry the housing through robust regions while separators prevent finished faces from rubbing. The aim is straightforward: the component that arrives should preserve the fit and surface condition approved on the sample.

Painted walls

Defined coverage and color

Finished interfaces

Masking and removable protection

Packing

Support the body and separate contact faces

10A CLEARER CASTING PURCHASE

Buy the complete housing around a clear supply boundary

Choose the delivery stage that reduces work at your plant. A raw blank leaves datum creation and finishing with your team; semi-machined supply can provide starting references; fully machined supply completes the agreed assembly interfaces. We can discuss the casting and CNC scope together, with primer, top coat and acceptance records attached to the same requirement. Start with the finished drawing, chosen iron and expected quantity, then identify the interfaces your assembly will use directly. That gives the quotation a tangible outcome: a housing with the right structure, finished relationships and receiving evidence.