Rleey | Custom Carbide Machining FAQ: Drawings, Grades and Quality Control From Our Factory
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- Bree
- Issue Time
- Oct 29,2026
Summary
Drawing review, carbide grade selection and quality control are the three core pillars of successful custom tungsten carbide machining. This FAQ answers frequent questions around these three modules directly from our factory. We explain drawing format requirements, dimension annotation rules, the difference between carbide grain sizes and cobalt ratios.
Full Article Structure
- 1. Introduction: Drawing, Grade & QC Decide Custom Carbide Quality
- 2. FAQ: Drawing Requirements for Custom Carbide Machining
- 3. FAQ: Tungsten Carbide Grade & Grain Size Selection
- 4. Our Factory QC Flow for Custom Carbide OEM Parts
- 5. Inspection Item & Acceptance Standard Table
- 6. Core FAQs on Drawing, Grade and QC
- 7. Summary & Technical Support
1. Introduction: Drawing, Grade & QC Decide Custom Carbide Quality
Many custom carbide projects fail because of unclear drawings, improper grade selection or undefined inspection standards. Our factory sorts out the most frequently asked questions about drawing submission, carbide grade matching and quality control. This guide helps you prepare complete technical documents, pick suitable material and confirm acceptance criteria before production.
2. FAQ: Drawing Requirements for Custom Carbide Machining
Clear drawings are the foundation of accurate carbide parts. We accept STEP, IGES, DXF, DWG and PDF files. Drawings must mark critical dimensions, tolerances, surface roughness, chamfer, edge treatment and material grade. If only samples are available, we can do reverse measurement and make formal drawings for your confirmation.
3. FAQ: Tungsten Carbide Grade & Grain Size Selection
Cobalt content and grain size directly decide hardness and toughness. Fine grain carbide delivers high hardness and smooth surface; medium grain balances wear resistance and impact resistance; coarse grain with higher cobalt works well under heavy impact. Our engineers will recommend the proper grade once you share workpiece material, load type and expected service life.
4. Our Factory QC Flow for Custom Carbide OEM Parts
- Raw material powder inspection: composition and particle size check
- Green compact dimension check before sintering
- Sintered blank appearance and hardness test
- Grinding & machining dimension sampling inspection
- Final full inspection: size, surface defect, edge condition
- Packing and attach inspection report for shipment
5. Inspection Item & Acceptance Standard Table
| Inspection Item | Testing Method | Acceptance Rule |
|---|---|---|
| Dimension & Tolerance | Micrometer, projector, CMM | Within drawing tolerance range |
| Hardness | Rockwell hardness tester | Match grade specification |
| Surface Defect | Visual & magnifying glass | No crack, chipping, obvious scratch |
| Surface Roughness | Roughness meter | Meet Ra value on drawing |
6. Core FAQs on Drawing, Grade and QC
Q1: Can you work with a picture without formal drawing?
Pictures can only be used for preliminary quotation. Formal production requires 2D drawing or 3D model with tolerance marked.
Q2: Can you provide hardness test report and inspection certificate?
Yes, we can supply inspection documents together with shipment as requested.
Q3: Will you change grade without notice during production?
No, material grade is fixed after quotation and sample confirmation. Any grade adjustment needs customer approval first.
7. Summary & Technical Support
Complete drawings, correct grade selection and clear QC standards reduce sample rework and quality disputes. Send your drawings and working conditions to our team, we will finish technical review and send you a clear quotation with inspection plan.
CTA Contact Zone
Submit Drawing for Technical Review
📧 Contact Us → /contact-us.htm
Send your drawing to get grade suggestion and QC plan.
Request Inspection Certificate
📧 Contact Us → /contact-us.htm
Tell us your document requirement for carbide OEM orders.
Disclaimer
Inspection standards and grade suggestions are for general reference. Final acceptance criteria shall follow your drawing and technical agreement. Sample testing is recommended before mass production.