CNC machining answers for lower-risk sourcing decisions.

Use turning for rotational features such as shafts, sleeves and bores, and milling for pockets, planar faces and non-rotational profiles. Parts containing both may need a combined route. Confirm datums, tolerances and inspection coverage before choosing the process.

Five-axis machining can be economical when it reduces re-clamping or provides access to angled and complex features. It is not automatically the lowest-cost option for simple parts. Compare total setup, machining and inspection effort.

6061 is commonly considered for general-purpose machined parts; 7075 is considered when higher strength is needed. Strength, corrosion environment, finish appearance, material condition and cost must be evaluated together. Do not substitute without drawing approval.

Anodizing, plating and coatings can change fit, surface texture and conductivity. Define finish thickness, masking, color, contact areas and whether final dimensions apply before or after treatment. Recheck critical features when required by the inspection plan.

Agree the report format before machining. A useful dimensional report links the drawing revision and identified characteristics to nominal values, tolerances, measured results and disposition. Material and finishing records are included when specified.

No. Finished-part accuracy also depends on material, geometry, fixturing, temperature, tool wear and the measurement method. Confirm achievable tolerances from the drawing and inspection plan rather than a machine specification alone.

Confirm casting grade, condition, datum surfaces, machining allowance, porosity acceptance and critical bores or sealing faces. Decide which casting features are reference-only and which must be machined and inspected. Clarify leak or pressure tests separately.

Use the same drawing revision, material grade and condition, quantity, finish specification, critical tolerances, inspection scope, packing requirements and shipping destination for every supplier. Compare scope and assumptions as well as unit price.

Send the latest controlled drawing and STEP model, state the part function and service environment, and identify critical features, documentation, packaging and delivery requirements. This lets engineering review manufacturing assumptions, qualification steps and logistics before a purchase order is released.

Tecpreva is best suited to stable, repeatable parts where the drawing, material, tolerance and revision are reasonably defined. Typical work includes qualification samples, repeat purchase parts, planned batch production, cost-down reviews and second-source development. We are less suited to emergency same-day replacements or designs that are still changing without a controlled revision.

Yes. Many customers qualify us alongside an existing supplier rather than replacing that supplier immediately. We can review the current drawing package, manufacture samples or first articles, align inspection requirements and build toward a controlled repeat-production arrangement.

No. A second-source program can start with one part family, a pilot batch or a first-article order. You decide whether Tecpreva remains a qualified backup, supports selected production batches or becomes part of a longer-term supply plan.

Local sourcing is usually more appropriate for breakdown repairs, very short lead-time emergencies, one-off parts required immediately, or designs that are changing too frequently to lock a manufacturing revision. We prefer to identify this early rather than promise a delivery plan that does not fit the project reality.

Send a 2D drawing with revision level, a 3D model when available, required material, quantity or annual forecast, tolerance and thread requirements, surface finish, inspection requirements and delivery location. If information is provisional, identify it so we can flag the related cost or manufacturability risk.

Our team checks the drawing package for manufacturability, material and tolerance clarity, critical features, inspection expectations and production risks. We then prepare a quotation with assumptions and questions clearly identified. Suitable projects may receive DFM feedback or practical cost-down options before production begins.

Yes. Where a design creates avoidable machining time, tool-access issues, unnecessary tolerance cost or inspection difficulty, we can highlight it before production. We do not change a drawing, material or critical feature without your written approval.

Yes. A cost-down review may include material alternatives, tolerance rationalisation, machining-route changes, batch-size planning, standard-tool access or finishing consolidation. Every suggestion is presented as an option with its technical trade-off; the approved drawing remains the production authority.

Control begins with drawing and revision confirmation, then continues through material verification, first-piece inspection where required, in-process checks, final inspection and packing review. The exact control plan depends on the part and your specification.

Yes. For new, critical or second-source parts, first-article inspection can be included before batch release. Please identify the report format, ballooned drawing requirements, critical characteristics and approval route during quotation so the inspection scope is clear before machining begins.

Depending on the agreed requirement, documents may include dimensional inspection reports, first-article reports, material certificates, surface-treatment certificates, batch identification and packing records. Provide required standards or customer templates in the RFQ so documentation can be planned with the job.

For controlled production, traceability links the approved drawing revision, material batch information, process route, inspection record and shipment record. Tell us the traceability level required for your industry so it can be included in the quotation and production plan.

We assess tolerances feature by feature rather than making a blanket claim. Capability depends on geometry, material, size, datum scheme, machine access and measurement method. Send the drawing and identify critical dimensions so we can confirm what is practical and how it will be checked.

Repeat production is managed from an approved drawing revision, agreed inspection requirements and a defined process route. For scheduled programs, we can align forecast information, batch size, material planning and release timing so supply is more predictable than treating every order as a new quotation.

For projects that require it, we can provide agreed milestones such as engineering confirmation, first-article status, production progress, inspection completion and shipping information. The reporting level is agreed during onboarding so your team receives useful checkpoints without unnecessary email traffic.

Lead time depends on drawing readiness, engineering questions, material availability, machine loading, process complexity, inspection scope, surface treatment and shipping destination. We state assumptions in the quotation and advise early if a requested date conflicts with required qualification steps.

Yes. Share an estimated annual volume, release pattern and acceptable batch size and we can review a more stable production and material plan. Forecasts do not need to be perfect; even a planning range helps identify where cost, capacity and lead-time control can improve.

We support common production materials including aluminium alloys, stainless steels, carbon and alloy steels, brass, copper, titanium and selected engineering plastics. Specify the exact grade, approved equivalents and certificate requirement in the RFQ.

Yes. Depending on the part and requirement, this may include anodising, plating, passivation, bead blasting, polishing, painting or other specified finishes. Include the finish standard, colour, thickness, mask requirements and cosmetic expectation so it can be quoted correctly.

Yes. Your approved drawing, model, revision and written specification are the production reference. If you use a customer inspection plan, reporting template, packaging standard or supplier quality requirement, provide it during quotation so it can be reviewed before acceptance.

Project information is used only for quotation, engineering review and authorised production activity. If your organisation requires an NDA, supplier agreement, restricted-access process or specific document-control procedure, raise it before sending sensitive files.

Packing is selected according to part geometry, surface condition, quantity and transit risk. Requirements can include part separation, protective wrapping, corrosion protection, labels, carton limits, export crates and customer-specific instructions.

Yes. We support export delivery planning for international customers. Confirm the destination, Incoterm where applicable, preferred freight method, customs documentation needs and any customer shipping-account instruction during quotation.

Share the controlled drawing package, expected volume, material and inspection requirements, current sourcing challenge and preferred qualification timeline. We will review the manufacturing basis and recommend a practical route such as a sample order, first-article inspection or pilot batch.

Send one representative part or part family for review. Include the factors that matter most to your decision—cost, tolerance, certification, lead time, finish, documentation or repeat volume. A focused review provides better evidence than a generic capability comparison.