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Jiangkai Casting logoJK CastingDrawing-based OEM metal parts
CNC Machining

CNC machining for the castings we supply.

Our in-house machining completes drawing-based casting orders. Send the finished drawing, cast grade and quantities to review bores, faces, threads, fits and inspection. The quotation covers the casting and required machining together.

Critical-datum reviewFixture planningDimensional inspection
CNC machining a custom metal component with coolant
Machining RFQDefine the critical features, setup route, and inspection basis.
Machining route
Machining brings cast parts to the agreed finished dimensions.Datums · fixtures · bores · faces · threads · final inspection
TurningRound and shaft features
MillingFaces, slots, and pockets
Boring & drillingCritical holes and fits
ThreadingFunctional connection points
Machining scope

Match each machining operation to the feature it must control.

A process plan starts with functional datums and inspection access, then assigns the required operations. For cast blanks, review the machined casting supply condition; define critical features through the inspection plan.

TR

Turning

Control diameters, shoulders, grooves, faces, and concentric features around a stable rotational datum.

ML

Milling

Machine mounting faces, slots, pockets, profiles, and hole patterns from defined setup references.

BR

Boring

Finish bearing seats, aligned bores, sealing diameters, and other internal features that control fit.

DT

Drilling and threading

Define hole position, depth, thread specification, entry condition, and inspection before production.

FX

Fixture strategy

Choose clamping points and setup sequence that protect the functional datums without distorting the part.

IN

Inspection plan

Match gauges and measurement methods to the tolerances, fits, and feature relationships on the drawing.

CNC machined metal components with finished bores and faces
Machining definition before setup
Datum & tolerance review

Define datums, tolerances, and measurement before cutting starts.

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.

✓Functional datums and setup sequence
✓Bore, shaft, and concentric fit requirements
✓Flatness, parallelism, and perpendicularity
✓Thread specification, position, and depth
✓Surface finish on functional interfaces
✓Gauge, report, and sampling requirements
Machining workflow

A machining workflow built around the finished drawing.

1

Drawing & tolerance review

Identify functional datums, critical fits, threads, finishes, and inspection requirements.

2

Fixture & setup proof

Plan clamping, tool access, setup order, stock condition, and distortion control.

3

Machining & in-process checks

Machine by controlled setups and measure risk features before the next operation.

4

Final inspection & protection

Verify specified features, deburr, clean, preserve, and pack the finished components.

Machining records

Evidence that supports fit, assembly, and repeat production.

Keep the finished drawing, setup basis, in-process checks, and final results aligned to the same revision and functional datums.

Datum-controlled drawing

Identify the references that control machining, assembly, and dimensional inspection.

Setup and fixture plan

Record how the part is located, clamped, and transferred between operations.

In-process measurement

Check high-risk features before later operations make correction difficult or expensive.

Final dimensional report

Report the agreed features, measurement method, sampling basis, and acceptance result.

Frequently asked questions

Machining questions before setup approval.

Final machining acceptance should follow the controlled drawing, purchase order, and agreed inspection plan.

Can you machine castings and stock material?
We provide machining for the castings we supply. 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.
How do you review machining tolerances?
We review each tolerance with its datum, feature size, tool access, setup sequence, material condition, and measurement method.
Can you machine bores, faces, and threads?
Yes. Turning, milling, drilling, boring, and threading are reviewed against the drawing and inspection requirements before quotation.
What should a machining RFQ include?
Send the drawing or model, material and starting condition, quantity, critical features, surface finish, inspection scope, and delivery requirements.
Machining RFQ

Send the drawing with datums, tolerances, material, and quantity.

We will review the starting condition, setup sequence, cutter access, critical features, inspection method, finishing, and the practical quotation scope.