# Precision CNC Machining Lead Times: A Buyer’s Guide

> Precision Advanced Manufacturing breaks down CNC machining lead times for aerospace, defense and UAV programs. Get accurate timelines and RFQ tips.

**Published:** 2026-09-23 | **Updated:** 2026-10-02 | **Author:** precision
**URL:** https://precisionam.com/articles/precision-machining/precision-cnc-machining-lead-times/
**Type:** post

**Categories:** Precision Machining

![Precision CNC Machining Lead Times: A Buyer’s Guide](https://blog.precisionam.com/wp-content/uploads/sites/56/2026/09/1789986582112-edd94bd3dd57-1024x572.webp)

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## Content

## Key Takeaways

- Precision CNC machining lead times function as a multi-phase budget. Aerospace programs add requirements such as FAI, CMM reports, material certifications, ITAR handling and NADCAP finishing that generic guides overlook.
- Key schedule drivers include part complexity, material availability, quantity, tolerances, finishing requirements and documentation and compliance. Aerospace-specific adders often contribute the most days.
- The lead-time clock starts after drawing finalization, material confirmation and production scheduling. Clear phase definitions support realistic program schedules.
- Effective ways to reduce lead time while holding tolerances include early DFM collaboration, complete GD&T documentation, tolerance rationalization, strategic material selection and consolidating finishing with machining.
- Precision Advanced Manufacturing provides integrated capabilities across two U.S. facilities with AS9100D, ISO 9001:2015 and ITAR registration to support mission-critical aerospace, defense and UAV programs from prototype through full-rate production.

[Get a phase-by-phase lead-time estimate](https://precisionam.com/request-a-quote/?utm_source=ai-growht-agent&utm_term=precision-cnc-machining-lead-times)

## Core Drivers of Precision CNC Machining Lead Time

Lead time reflects several independent variables that can stack and extend the schedule.

- **Part complexity:** Multi-axis geometry, thin walls and deep pockets require more setups, longer cycle times and additional inspection steps.
- **Material availability:** [Common aluminum alloys are typically on the shelf](https://reayonsolution.com/cnc-machining-lead-times-2026). [Specialty alloys, certified aerospace material or oversize stock can add weeks](https://bravoteam.tech/blog-materials-selection-engineering-prototypes), and in some cases material procurement dominates total lead time.
- **Quantity:** Prototype runs and full-rate production runs follow different scheduling logic. Higher quantities require more machine time, more inspection and more documentation.
- **Tolerances:** Tight tolerances require slower feeds, more inspection passes and climate-controlled environments. [Moving from standard to precision tolerances can multiply machining and inspection time](https://midwestindustries.org/blog/prototype-cnc-machining) for affected features.
- **Finishing requirements:** [Anodizing, passivation, plating and heat treatment all run on their own queues](https://reayonsolution.com/cnc-machining-lead-times-2026). [These processes often run at outside vendors, and their queues add days to weeks](https://reayonsolution.com/cnc-machining-lead-times-2026). Integrated finishing shortens this phase.
- **Documentation and compliance:** In aerospace and defense, documentation often adds the most time. [Documentation and inspection activities can account for a substantial portion of total manufacturing lead time for complex precision parts](https://nimblemfg.co/understanding-lead-times-precision-manufacturing).

Precision Advanced Manufacturing’s engineering support and manufacturability reviews identify these factors at the outset before they become schedule surprises.

![A machined metal part fixtured inside a CNC machining center.](https://cdn.aigrowthmarketer.co/1785163886671-8f5217244f88.webp)**Mission-critical components leave no room for deviation. Multi-axis CNC machining holds tight tolerances part after part, with full material traceability behind every feature.**

## Phases of the Lead-Time Clock

The production clock starts after drawing finalization, material confirmation and production scheduling. Each phase contributes its share of the total schedule.

- **RFQ and quote:** The supplier reviews the technical data package, assesses complexity and returns pricing. Complete documentation accelerates this step. [Accurate quoting requires STEP or native CAD models, 2D drawings with GD&T, material specifications and quantity information](https://cncpioneer.com/blog/precision-aerospace-cnc-machined-parts).
- **DFM and programming:** Engineering reviews the design for manufacturability, develops CNC programs and plans fixturing. Early DFM collaboration compresses this phase and reduces downstream rework.
- **Material sourcing:** The supplier procures raw material and verifies mill certifications. For DFARS-covered contracts, melt-origin documentation must be obtained before material is cut, which can extend this phase if compliant stock is not on hand.
- **Machining:** Actual cutting time is often the shortest phase. Multi-axis operations, difficult materials and tight tolerances extend cycle time, yet machining often remains secondary to documentation on regulated programs.
- **Secondary operations and finishing:** Deburring, hardware installation and surface treatments such as anodizing or passivation follow machining. [Discovering a NADCAP accreditation gap at first article inspection can force refinishing at an accredited shop](https://yijinsolution.com/surface-finish/aerospace), adding cost and weeks.
- **Inspection and documentation:** CMM verification, dimensional reporting and FAI package assembly happen here. [A first-article inspection report for a moderately complex machined part can take several hours to generate correctly](https://nimblemfg.co/understanding-lead-times-precision-manufacturing), and that time appears in lead time.
- **Shipping:** Domestic shipment remains predictable. International shipment adds transit time, customs clearance and re-inspection risk.

Precision Advanced Manufacturing offers quote-based project evaluation before production to align expectations across all phases before the clock starts.

## Typical Lead-Time Patterns by Job Type

The following patterns describe how different job types tend to behave. Actual lead times depend on the specific factors described above.

**Standard prototype work:** Common material and simple geometry show the shortest relative lead time. Primary time drivers include programming, setup and material availability. Aerospace adders remain minimal and typically involve basic material certifications.

**Precision prototype work:** Moving up in complexity, precision prototype work with tight tolerances and regulated documentation shows moderate relative lead time. Primary time drivers include inspection, FAI package preparation and material traceability. Aerospace adders include FAI per AS9102, CMM reports and mill certifications.

**Complex 5-axis or difficult materials:** Complex 5-axis work or difficult materials such as titanium and Inconel show longer relative lead time. Primary time drivers include cycle time, tooling, finishing queue and material procurement. Aerospace adders include full FAI, NADCAP finishing and DFARS melt verification.

![A five-axis CNC head machining a round metal workpiece.](https://cdn.aigrowthmarketer.co/1785163943949-293d9b0cce58.webp)**Five-axis machining reaches complex geometries in a single setup — fewer fixtures, tighter true position, and the repeatability aerospace and defense programs demand.**

**Low-volume regulated production:** Low-volume production with regulated requirements and multiple pieces shows moderate to long relative lead time. Primary time drivers include queue position, inspection volume and finishing. Aerospace adders include FAI closeout and NADCAP accreditation verification.

**Full-rate production:** Full-rate production shows the longest absolute lead time across the program and the shortest per-unit time. Primary time drivers include scheduling, capacity and sustained finishing supply. Aerospace adders include ongoing traceability and repeat FAI on process changes.

Precision Advanced Manufacturing supports the full product lifecycle from prototype through full-rate production. This continuity streamlines transitions and removes re-qualification delays between phases.

## Impact of FAI, CMM and Material Certs on Lead Time

Aerospace-specific requirements anchor any realistic lead-time budget. Each requirement follows AS9100D and ITAR-compliant quality systems.

![A commercial airliner in flight against a blue sky.](https://cdn.aigrowthmarketer.co/1785164215115-cf050b902241.webp)**Aerospace manufacturing for flight-critical hardware — machined and fabricated to AS9100D with the traceability and repeatability commercial airframe programs depend on.**

**First article inspection (FAI):** A complete FAIR package includes several elements: design documentation review, a balloon drawing with every characteristic numbered, characteristic accountability with measurement method and actual measured values, material and process certifications and functional test results where required. FAI is required before production quantities begin, and its closeout time is often left out of quoted machining lead times.

**CMM inspection reports:** Coordinate measuring machines verify critical features against GD&T callouts. [CMM verification on critical features is a standard requirement under AS9100D-compliant quality systems](https://kintec-machining.com/blog/aerospace-cnc-machining), and the reporting process adds additional days beyond machining time.

![A CMM touch probe measuring a machined aluminum bracket.](https://cdn.aigrowthmarketer.co/1785164194032-a09872ce26c4.webp)**Every critical dimension is verified — CMM inspection and AS9100D-controlled quality workflows produce first-article and in-process data you can trace to each part.**

**Material certifications:** [Material certifications must be traceable to the mill heat number for every batch](https://kintec-machining.com/blog/aerospace-cnc-machining). For DFARS-covered programs, melt-origin verification adds another layer. Flagging DFARS requirements at RFQ rather than after the quote avoids a common source of program delays.

**ITAR handling:** [A registered facility maintains documented U.S.-person workforce controls, access-controlled facilities and traceable handling of controlled technical data](https://rapidcision.com/blog-top-cnc-machining-services-defense-itar). These controls add administrative steps before production can start. Verifying ITAR compliance at the RFQ stage prevents delays at job launch.

**NADCAP finishing:** [The number of NADCAP-accredited facilities for chemical processing has not scaled at the same pace as production requirements](https://cmfpro.com/nadcap-accreditation-is-the-floor-capacity-is-the-ceiling). Queue backlogs at finishing suppliers are a leading cause of lead-time drift on aerospace programs. [Integrating precision machining and NADCAP-accredited finishing under one roof eliminates intermediate queues](https://cmfpro.com/nadcap-accreditation-is-the-floor-capacity-is-the-ceiling).

Precision Advanced Manufacturing plans FAI, CMM reporting, material traceability and finishing as part of the schedule and builds these adders into its quality system.

## How to Reduce CNC Machining Lead Time Without Sacrificing Tolerances

Schedule compression starts at the design and sourcing stage. The following strategies work together to shorten lead time while maintaining compliance and tolerance integrity.

1. **Engage DFM early:** Conducting a supplier DFM review before freezing the design helps eliminate costly engineering change orders and rework after programming or tooling commitments have begun.
2. **Provide complete GD&T documentation upfront:** Incomplete technical packages are the most common cause of avoidable lead-time delays. A complete RFQ package moves directly to production scheduling upon order award.
3. **Rationalize tolerances:** Once documentation is complete, review each tolerance to confirm it is functionally required. [Procurement teams that run tolerance rationalization reviews at design release recover meaningful savings in machining spend across the program lifecycle](https://bozemetal.com/industrynews/xometry-vs-protolabs-cnc-machining).
4. **Select materials strategically:** Common aerospace alloys with available certified stock reduce procurement lead time. Early flagging of specialty material requirements and DFARS melt-origin needs at the RFQ stage supports accurate schedules.
5. **Consolidate finishing under one roof:** When machining and finishing are managed by a single supplier, expediting becomes an internal scheduling decision instead of a queue negotiation with a separate vendor.
6. **Use repeat and Kanban scheduling:** For sustained production, scheduled releases against a firm volume commitment reduce queue time and remove repeated programming cycles.
7. **Engage inspection requirements early:** Defining FAI scope, CMM requirements and NADCAP finishing specifications at the RFQ stage prevents re-quotes and documentation gaps that extend the schedule.

Precision Advanced Manufacturing’s integrated capabilities in multi-axis machining, fabrication, finishing and engineering support under one roof reduce handoffs and shorten queues across the entire workflow.

![A precision machine shop floor with CNC equipment and work cells.](https://cdn.aigrowthmarketer.co/1785163904437-77d81f3f11f5.webp)**Advanced manufacturing under one roof — a climate-stable, AS9100D-run shop floor where multi-axis CNC, turning, and fabrication cells work prototype-to-full-rate volumes.**

[Discuss lead-time compression options](https://precisionam.com/request-a-quote/?utm_source=ai-growht-agent&utm_term=precision-cnc-machining-lead-times)

## Domestic Versus Overseas Lead Times for Precision CNC Machining

Overseas quotes can appear competitive on unit price, yet the total lead time to a compliant, delivered part often tells a different story. [Total RFQ-to-delivery for complex regulated parts from Asia can run substantially longer than domestic alternatives when shipping, customs clearance and re-inspection are included](https://reayonsolution.com/cnc-machining-lead-times-2026).

Offshore sourcing often requires a significant safety-stock buffer to protect against transit and disruption risk, which ties up capital and complicates program scheduling. [The hidden cost of re-qualifying a new offshore source, including print reviews, first article inspections and inspection time, can run into the thousands of dollars per part number](https://fairchildparts.com/precision-machined-parts-tariffs-2026).

ITAR compliance adds another dimension. Foreign nationals at a machining supplier’s facility generally cannot access ITAR-controlled drawings without a license or exemption, which creates compliance exposure for shops that have not addressed controlled-data segregation. Overseas suppliers without DDTC registration cannot legally receive technical data packages for ITAR-controlled programs.

[AS9100 compliance appears in many tier-1 vendors in some overseas clusters, yet NADCAP coverage remains thinner](https://sourcebyspec.com/news/aerospace-procurement-strategy-spec-gates-supplier-maps-and-cost-discipline.html). Procurement teams must verify process-specific credentials before issuing an RFQ to an overseas supplier.

Precision Advanced Manufacturing’s U.S.-based facilities in California and Texas remove international shipping and customs delays. ITAR registration supports defense programs, and domestic operations reduce the re-inspection burden that overseas sourcing often creates.

## RFQ Inputs for Accurate Quotes and Realistic Lead Times

Accurate quotes depend on complete technical packages. Providing the following inputs at the RFQ stage supports precise lead-time estimates and reduces the risk of mid-cycle re-quotes.

- STEP file for 3D geometry
- 2D drawing with complete GD&T callouts
- Material specification, including alloy, temper and any AMS or DFARS requirements
- Surface finish and finishing process requirements, including NADCAP scope if applicable
- Quantity, including prototype and production volumes
- Inspection and documentation requirements, including FAI scope, CMM reporting and traceability expectations
- ITAR designation and any export control flags

Precision Advanced Manufacturing’s team assists with project evaluations and provides tailored quotes that account for all phases of the lead-time budget.

## Buyer’s Schedule-Protection Checklist

Procurement and program management teams can protect schedules by validating key points with any precision CNC machining supplier.

**Questions to ask a supplier:**

- Is the facility AS9100D certified and ITAR registered, and does the scope cover CNC machining of aerospace and defense components?
- Does the supplier hold in-house finishing capabilities, and are those processes NADCAP accredited for the required process categories?
- How does the supplier handle FAI and CMM, and can a sample AS9102 FAIR package be provided for review?
- What capacity exists for scaling from prototype to full-rate production without a supplier change?
- How does the supplier handle DFARS specialty metals requirements, and can melt-origin documentation be provided at receiving?
- What are the current finishing queue lead times, and are they managed internally or outsourced?

**Lead-time risk indicators in a quote:**

- A single lead-time figure with no phase breakdown
- No mention of FAI closeout time or finishing queue
- Vague documentation commitments or no sample FAIR available
- ISO 9001 certification presented as equivalent to AS9100D
- Absence of ITAR registration for defense or USML-adjacent programs
- Finishing subcontracted to unverified sub-tiers without NADCAP accreditation

Program schedules benefit from built-in contingency and confirmed supplier capacity before the purchase order is placed. [An accredited supplier with a full order book can be functionally unavailable to a program regardless of its certificate](https://cmfpro.com/nadcap-accreditation-is-the-floor-capacity-is-the-ceiling), so capacity confirmation carries the same weight as certification verification.

Precision Advanced Manufacturing holds AS9100D and ISO 9001:2015 registrations and maintains ITAR registration. The company integrates machining and finishing under one roof and scales from prototype through multi-shift full-rate production, checking every box on this list.

[Review schedule and capacity with the team](https://precisionam.com/request-a-quote/?utm_source=ai-growht-agent&utm_term=precision-cnc-machining-lead-times)

## Frequently Asked Questions

### What Is the Typical Lead Time for Precision CNC Machining?

Lead time varies by job type, material, quantity and documentation requirements. A simple prototype in a common material moves faster than a regulated aerospace production run requiring FAI, CMM reporting and NADCAP-governed finishing. The most accurate answer comes from a supplier that has reviewed the complete technical package and can provide a phase-by-phase breakdown.

### How Do Aerospace Requirements Like FAI and ITAR Affect Lead Time?

FAI requires a full dimensional and documentation review before production quantities begin. As noted earlier, FAI closeout time is often left out of quoted machining lead times. ITAR handling adds administrative steps at job launch, including data access controls and U.S.-person verification. Both requirements apply on regulated programs and must appear in the schedule from the start. Precision Advanced Manufacturing incorporates these steps into its quality system.

### Can Lead Time Be Reduced Without Compromising Quality?

Lead time can be reduced through early DFM collaboration, complete documentation at RFQ, tolerance rationalization, strategic material selection and consolidating machining and finishing under one supplier. These approaches reduce handoffs and administrative delays while maintaining tolerances and compliance requirements. Precision Advanced Manufacturing’s integrated capabilities and engineering support align with these strategies.

### What Materials Are Available for Precision CNC Machining?

Precision Advanced Manufacturing handles a broad range of materials, including aluminum, stainless steel, Inconel and other high-nickel superalloys, plus copper, brass, bronze, carbon steel and composites including fiber, carbon and Kevlar. Material selection affects both lead time and cost, and the engineering team can advise on material choices that meet performance requirements while supporting schedule and budget objectives.

### How Does Precision Advanced Manufacturing Support On-Time Delivery?

On-time delivery follows a structured process. Integrated capabilities under one roof remove handoffs between machining, finishing and inspection. Engineering support at the outset reduces rework risk. AS9100D-compliant quality checkpoints provide visibility at every production stage. Scalable, multi-shift operations allow the team to respond to program requirements without supplier changes or capacity gaps.

### What Certifications Should a Precision CNC Machining Supplier Have?

For aerospace and defense programs, AS9100D certification sets the baseline. [AS9100D includes aerospace-specific requirements for risk management, configuration management and first-article inspection](https://cncpioneer.com/blog/precision-aerospace-cnc-machined-parts). ITAR registration is required for any program involving U.S. Munitions List items. [NADCAP accreditation for relevant special processes such as heat treatment, chemical processing and NDT is required when those processes are performed in-house](https://kintec-machining.com/blog/aerospace-cnc-machining). Precision Advanced Manufacturing holds AS9100D, ISO 9001:2015 and ITAR registration.

### How Does Domestic Sourcing Compare to Overseas for Lead Time?

Domestic sourcing removes international shipping, customs clearance and re-inspection delays. For ITAR-controlled programs, domestic suppliers avoid the compliance exposure that overseas sourcing can create. While overseas unit prices may appear lower, the total landed cost that includes tariffs, freight, buffer inventory and re-qualification costs often narrows or removes the apparent savings. Precision Advanced Manufacturing’s California and Texas facilities provide domestic lead times with full regulatory compliance.

## Conclusion and Next Steps

Precision CNC machining lead times function as a structured budget to plan across phases. On aerospace, defense and UAV programs, documentation, inspection and compliance often add more time than cutting. FAI closeout, CMM reporting, material traceability, ITAR handling and NADCAP finishing queues belong in the schedule from the beginning.

Precision Advanced Manufacturing operates for this environment. AS9100D, ISO 9001:2015 and ITAR compliance appear in every project. Integrated machining, fabrication, finishing and engineering support under one roof reduce handoffs and queue delays across the supply chain. Scalable production from prototype through full-rate manufacturing allows programs to transition without supplier changes or re-qualification cycles.

Next steps include early engagement with Precision Advanced Manufacturing, submission of a complete technical package and application of the checklist in this guide across the program’s supply base. Early collaboration removes schedule risk before the clock starts.

[Start a lead-time review with Precision Advanced Manufacturing](https://precisionam.com/request-a-quote/?utm_source=ai-growht-agent&utm_term=precision-cnc-machining-lead-times)

## Read Next

- [Precision CNC Machining for Aerospace: A Buyer’s Guide](https://precisionam.com/articles/precision-cnc-aerospace-machining-guide?utm_source=ai-growht-agent&utm_term=precision-cnc-machining-lead-times)
- [Aerospace Machine Shop Lead Time: What to Know in 2026](https://precisionam.com/articles/aerospace-machine-shop-lead-time?utm_source=ai-growht-agent&utm_term=precision-cnc-machining-lead-times)
- [Estimating CNC Lead Times in Austin: A 2026 Buyer’s Guide](https://precisionam.com/articles/cnc-lead-times-austin?utm_source=ai-growht-agent&utm_term=precision-cnc-machining-lead-times)
- [Defense Industry CNC Machining: A Buyer’s Guide](https://precisionam.com/articles/defense-industry-cnc-machining?utm_source=ai-growht-agent&utm_term=precision-cnc-machining-lead-times)

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      - **Text:** Lead time varies by job type, material, quantity and documentation requirements. A simple prototype in a common material moves faster than a regulated aerospace production run requiring FAI, CMM reporting and NADCAP-governed finishing. The most accurate answer comes from a supplier that has reviewed the complete technical package and can provide a phase-by-phase breakdown.
    **Question:**

    - **Name:** How Do Aerospace Requirements Like FAI and ITAR Affect Lead Time?
      **Answer:**

      - **Text:** FAI requires a full dimensional and documentation review before production quantities begin. As noted earlier, FAI closeout time is often left out of quoted machining lead times. ITAR handling adds administrative steps at job launch, including data access controls and U.S.-person verification. Both requirements apply on regulated programs and must appear in the schedule from the start. Precision Advanced Manufacturing incorporates these steps into its quality system.
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    - **Name:** Can Lead Time Be Reduced Without Compromising Quality?
      **Answer:**

      - **Text:** Lead time can be reduced through early DFM collaboration, complete documentation at RFQ, tolerance rationalization, strategic material selection and consolidating machining and finishing under one supplier. These approaches reduce handoffs and administrative delays while maintaining tolerances and compliance requirements. Precision Advanced Manufacturing’s integrated capabilities and engineering support align with these strategies.
    **Question:**

    - **Name:** What Materials Are Available for Precision CNC Machining?
      **Answer:**

      - **Text:** Precision Advanced Manufacturing handles a broad range of materials, including aluminum, stainless steel, Inconel and other high-nickel superalloys, plus copper, brass, bronze, carbon steel and composites including fiber, carbon and Kevlar. Material selection affects both lead time and cost, and the engineering team can advise on material choices that meet performance requirements while supporting schedule and budget objectives.
    **Question:**

    - **Name:** How Does Precision Advanced Manufacturing Support On-Time Delivery?
      **Answer:**

      - **Text:** On-time delivery follows a structured process. Integrated capabilities under one roof remove handoffs between machining, finishing and inspection. Engineering support at the outset reduces rework risk. AS9100D-compliant quality checkpoints provide visibility at every production stage. Scalable, multi-shift operations allow the team to respond to program requirements without supplier changes or capacity gaps.
    **Question:**

    - **Name:** What Certifications Should a Precision CNC Machining Supplier Have?
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      - **Text:** For aerospace and defense programs, AS9100D certification sets the baseline. AS9100D includes aerospace-specific requirements for risk management, configuration management and first-article inspection. ITAR registration is required for any program involving U.S. Munitions List items. NADCAP accreditation for relevant special processes such as heat treatment, chemical processing and NDT is required when those processes are performed in-house. Precision Advanced Manufacturing holds AS9100D, ISO 9001:2015 and ITAR registration.
    **Question:**

    - **Name:** How Does Domestic Sourcing Compare to Overseas for Lead Time?
      **Answer:**

      - **Text:** Domestic sourcing removes international shipping, customs clearance and re-inspection delays. For ITAR-controlled programs, domestic suppliers avoid the compliance exposure that overseas sourcing can create. While overseas unit prices may appear lower, the total landed cost that includes tariffs, freight, buffer inventory and re-qualification costs often narrows or removes the apparent savings. Precision Advanced Manufacturing’s California and Texas facilities provide domestic lead times with full regulatory compliance.

  **Article:**

  - **Headline:** Precision CNC Machining Lead Times: A Buyer's Guide
  - **Description:** Precision Advanced Manufacturing breaks down CNC machining lead times for aerospace, defense and UAV programs. Get accurate timelines and RFQ tips.
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    - **Name:** Precision Advanced Manufacturing
    - **Url:** https://precisionam.com


---

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## Citations

- [ITAR CNC Lathe Services: Buyer Sourcing & Verification Guide](https://precisionam.com/articles/precision-machining/itar-cnc-lathe-services/)
- [The Definitive Guide to ITAR Swiss Machining](https://precisionam.com/articles/precision-machining/itar-swiss-machining-guide/)
- [ITAR CNC Machining Titanium Parts: A Buyer’s Guide](https://precisionam.com/articles/precision-machining/itar-cnc-machining-titanium-parts/)
- [Swiss Machining Services in Austin: A Supplier Buyer’s Guide](https://precisionam.com/articles/precision-machining/swiss-machining-services-austin/)
- [Tight-Tolerance ITAR CNC Machining: A Buyer’s Guide](https://precisionam.com/articles/precision-machining/tight-tolerance-itar-cnc-machining/)

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