Secondary Processes for Custom Machined & Fabricated Parts
Surface finishing, heat treatment, precision grinding and EDM coordinated with machining, final inspection and the requirements on your drawing.
Processes Coordinated Around the Finished Part
Select the process page for applications and control points, or send the complete drawing for a route review.
Surface Finishing
Anodizing, plating, passivation, powder coating, black oxide and mechanical finishes coordinated with masking, coating thickness and final inspection.
View ProcessHeat Treatment
Heat-treatment coordination with hardness and case-depth requirements, distortion planning and post-treatment dimensional verification.
View ProcessPrecision Grinding
Surface, OD, ID and centerless grinding review for critical dimensions, flatness, roundness, runout and surface-roughness requirements.
View ProcessEDM Machining
Wire and sinker EDM support for hardened conductive materials, narrow slots, internal profiles and features that are difficult to machine conventionally.
View ProcessPlan the Route Before the First Cut
Secondary processing affects dimensions, surfaces and inspection access. These controls keep the drawing requirements connected from machining through final release.
- 01
Drawing and specification review
Material condition, process standard, finished dimensions, masking areas and required records are confirmed before release.
- 02
Allowance and sequence planning
Coating build, heat-treatment distortion and stock for grinding or finish machining are planned into the manufacturing route.
- 03
Controlled processing
In-house operations and qualified processing partners work from the approved requirements, lot information and acceptance criteria.
- 04
Final-condition inspection
Applicable dimensions, hardness, coating, surface condition and documentation are checked before protected packing and shipment.
Secondary Process Questions
Direct answers about route planning, dimensional control and documentation.
What secondary processes can OUJI coordinate?
Common routes include anodizing, electroless nickel and zinc plating, passivation, powder coating, black oxide, bead blasting and polishing, together with heat treatment, precision grinding and EDM when the drawing requires them. Process availability is confirmed against the material, geometry, specification and quantity.
Can machining and secondary processes be quoted under one order?
Yes. OUJI reviews machining allowance, process sequence, masking, outside processing, final inspection and packing as one manufacturing route. Work may be completed in-house or through qualified processing partners, while OUJI remains responsible for requirement transfer and final acceptance.
What information should be included in the RFQ?
Send the 3D model and controlled drawing with the material grade and starting condition, process name and governing standard, type or class, color or hardness range, coating or case depth, masking areas, finished-state tolerances and required inspection records. Mark cosmetic faces, threads, bearing fits and sealing surfaces clearly.
How are dimensional changes after processing controlled?
Coatings can add measurable thickness, and heat treatment can move critical features. OUJI reviews which dimensions apply before or after processing, then plans masking, machining allowance, staged inspection, grinding or finish machining where needed. Critical dimensions are verified in the required final condition.
What secondary-process documents can be supplied?
Depending on the drawing and purchase requirements, available records may include material certificates, heat-treatment certificates, hardness and case-depth results, coating certificates or thickness checks, surface-roughness results and final dimensional inspection reports. Required documents should be identified before quotation.