01
Geometry & datums
Part envelope, datum strategy, wall transitions, draft, ribs, bosses, and access for tooling.
Drawing Review
Drawing Review for Castings and Machined Parts
Before quotation, JK Casting reviews 2D drawings, 3D files, samples, or worn parts for geometry, tolerances, material, machining stock, finish, and inspection. The goal is a quote-ready production plan with missing inputs identified before tooling or sampling.
Drawing-based reviewLow-to-mid volumeExport support
Capability pageClear technical scope, practical production route, and RFQ-ready evidence.
RFQ readiness
Identify missing inputs before they delay quotation.2D drawings · 3D files · sample photos · revision notes2D drawingsPDF, DWG, DXF
3D modelsSTEP, STP, IGES
Physical samplesNew or worn parts
Revision controlDrawing status tracked
Review scope
What our engineering team checks before quotation.
The review identifies manufacturing risks and makes the quoted scope clear. Check material and standard requirements alongside the inspection and documentation plan. Include initial batch, annual demand, and delivery schedule for repeat-production projects.
02
Tolerance feasibility
Critical dimensions, geometric controls, fit relationships, and tolerance stack-up.
03
Casting allowances
Shrinkage, machining stock, parting direction, cores, fillets, and likely process route.
04
Material definition
Grade, heat treatment, hardness, equivalencies, and certificate requirements.
05
Finish requirements
Coating system, masking zones, surface condition, appearance, and corrosion exposure.
06
Inspection plan
Critical features, sampling level, gauges, reports, traceability, and packaging controls.
Common issues
Drawing issues we often flag before quotation.
These gaps are easier to close before tooling than after the first sample.
✓No general tolerance note, or an as-cast tolerance tighter than the process allows
✓No machining allowance or datum scheme, so cast and machined dimensions cannot be separated
✓Sudden wall-thickness changes, sharp internal corners or isolated heavy sections that raise shrinkage risk
✓A material called only “cast iron” or “steel”, with no grade or standard
✓Wrought grades such as 1045 called out on a cast part, which need a cast-equivalent decision
✓Coating or galvanizing specified without masking for threads, bores or sealing faces
✓No stated inspection requirement, so the required record is unclear
Tolerance reference used in the review
Sand casting, as-cast
ISO 8062 CT8–CT10, depending on geometry.
Lost-wax investment casting, as-cast
ISO 8062 CT5–CT7, depending on geometry.
CNC-machined features
Commonly ±0.02–0.05 mm, depending on the feature.
How to read these bands
These are typical bands used in the review, not a guarantee for every feature. The drawing governs.
Technical evidence before production
Accepted inputs
Start with the information already available.
A complete drawing package is helpful, but it is not required for the first review. Send the strongest evidence you have and identify anything that is still uncertain.
✓2D drawing with dimensions and notes
✓3D model for geometry review
✓Physical sample or clear sample photos
✓Target material, quantity, and application
✓Critical fit, load, wear, or sealing conditions
✓Known finish, inspection, and packaging needs
Practical workflow
A practical review workflow from evidence to quotation.
1
Receive evidence
Drawings, CAD, samples, photos, notes, and quantities.
2
Review manufacturability
Confirm route, stock, access, tolerances, and open questions.
3
Clarify the scope
Resolve assumptions and record critical production requirements.
4
Issue the quotation
Quote the defined process, inspection scope, lead time, and commercial terms.
Deliverables & controls
What you receive from the review.
Document the technical basis so purchasing, production, inspection, and shipment use the same requirements.
Clarified quotation basis
A concise summary of the files, revisions, assumptions, and exclusions used for pricing.
Manufacturing route recommendation
A practical proposal for casting, machining, fabrication, finishing, and inspection.
Open-item list
Questions that must be resolved before tooling, sampling, or production release.
Traceable handoff
Approved drawings and technical notes stay linked to the production and inspection plan.
By application
Review points by application.
Each application has interfaces that decide whether the part fits. The linked checklists list what to send.
PL
Power line hardware
Pin-hole fit, galvanizing allowance and mating hardware.
OF
Oilfield cable protectors
Tubing and coupling size, cable profile and clamp closure.
AG
Agricultural machinery
Mounting-hole pattern, bore fit, load direction and wear areas.
CE
Construction equipment
Mounting interfaces, bore fit, load direction and wear areas.
IM
Industrial machinery housings
Bearing seats, sealing faces and datum strategy.
Frequently asked questions
Questions buyers ask before release.
Final acceptance criteria follow the approved drawing and purchase order.
Can you quote from a sample without a drawing?
Yes. Clear photos, dimensions, material clues, application details, and the physical sample can start the review. A production drawing may still be required before release.
Do you modify customer drawings?
We can flag manufacturability issues and suggest practical changes. Customer approval is required before any production definition changes.
Which file formats can you review?
Common formats include PDF, DWG, DXF, STEP, STP, and IGES. Native CAD can be discussed case by case.
How are drawing revisions controlled?
The quoted revision and later approved revision should be recorded explicitly so purchasing, production, and inspection use the same technical basis.
What happens if a drawing tolerance is tighter than casting allows?
We point it out in the review and propose options: machining that feature, adjusting the tolerance with your approval, or using the other casting process. The drawing is not changed without your approval.
Ready for review
Send your part requirements for a practical quotation path.
Share drawings, models, samples, quantities, material requirements, finish, inspection scope, and target delivery. We will review the evidence and identify the next technical step.
Before requesting a quotation
Machined housing RFQ: make the finished interfaces clear
Includes an editable worksheet for your purchasing and engineering review.