# JF Precision

> Shenzhen JF Precision Manufacturing Co., Ltd — One-stop CNC machining partner in Shenzhen, China. 5-axis milling, turning, vacuum casting and sheet metal fabrication. ISO 9001 certified, tolerances to ±0.003mm. Quote in 2–6 hours. Minimum order quantity: 1 piece.

JF Precision serves engineers and procurement teams worldwide needing precision metal and plastic parts — from single prototypes to mass production runs of 10,000+ pieces. In-house inspection with full reports and real photographs before every shipment.

## Main Services

- [CNC Milling](https://www.jf-rapid.com/cnc-milling.html): 5-axis and 3-axis CNC milling from prototype to series production. Metals and engineering plastics, machine strokes to 1000mm, deep-hole drilling to 1500mm at 0.01mm precision. Profile tolerance 0.01–0.03mm, Ra 0.8 surface finish. Assembly of metal and plastic sub-assemblies in-house.
- [CNC Turning](https://www.jf-rapid.com/cnc-turning.html): Precision CNC turning with tolerances down to ±0.003mm and surface roughness to Ra 0.1. Grade 5–7 fit tolerances controlled reliably. Special pipe threads and custom thread profiles. Broad material range including Inconel.
- [Vacuum Casting](https://www.jf-rapid.com/vacuum-casting.html): Silicone mould casting for prototypes and small series. Single cast, overmoulding, and 2K/3K multi-material casting. 5–10 day lead time from master model approval.
- [Sheet Metal & Stamping](https://www.jf-rapid.com/sheet-metal-stamping.html): Laser cutting, CNC bending, welding, and stamping. Parts deliverable within 3 days for simple geometries. In-house assembly and finishing.

## Quality & Certifications

- [Quality Assurance](https://www.jf-rapid.com/quality-assurance.html): Six-step documented QC process applied to every order: (1) material certification, (2) drawing review before programming, (3) in-process dimensional inspection to ISO 2768-mK, (4) thread and bore gauging with go/no-go gauges, (5) GD&T verification with CMM, (6) inspection report and photographs sent for customer approval before shipment. ISO 9001:2015 certified, Reg. no. 1982QA0004R0S, CNAS/IAF authenticated, valid to January 2028.
- [Inspection Capabilities](https://www.jf-rapid.com/quality-inspection.html): In-house metrology suite with CMM, 3D scanning, image measurement, roundness testing, hardness testing, and surface roughness measurement. Full dimensional inspection report with every order.

## Materials & Processes

- [Available Materials](https://www.jf-rapid.com/materials.html): Aluminium (6061, 7075, 2024), stainless steel (303, 304, 316), carbon steel, titanium, brass, copper, Inconel, POM/Delrin, PEEK, PTFE, nylon, HDPE, polycarbonate and more.
- [Heat Treatment & Surface Finishes](https://www.jf-rapid.com/heat-treatment-surface-finishes.html): 40+ treatments including anodizing, hard anodizing, zinc/nickel/chrome plating, PVD/DLC coating, powder coating, passivation, quenching, nitriding, and carburization.
- [Equipment List](https://www.jf-rapid.com/cnc-equipment.html): Full inventory of in-house CNC machining centres (DMG Mori 5-axis), lathes, EDM, and precision inspection equipment at Shenzhen facility.

## Blog

- [Blog](https://www.jf-rapid.com/blog.html): Practical articles on custom CNC machining from the JF Precision engineering team.
- [Coating Allowance for Precision CNC Parts](https://www.jf-rapid.com/blog/coating-allowance-precision-cnc-parts.html): How coating thickness changes outside diameters, internal bores, threads and fits, and how JF Precision controls pre-coating and final dimensions for custom CNC parts.
- [Ni + NTDC vs Ni + XADC®](https://www.jf-rapid.com/blog/ni-ntdc-vs-ni-xadc-cnc-parts.html): Compare Ni + NTDC and Ni + XADC® nickel-chrome composite coatings for custom CNC parts — corrosion, wear, aluminum compatibility and dimensional planning.
- [CNC Machining Inspection Reports](https://www.jf-rapid.com/blog/cnc-machining-inspection-report.html): What a CNC machining inspection report should include, and how JF Precision verifies dimensions, tolerances, GD&T, threads, surface roughness and coated parts before shipment.
- [Custom CNC Milled Parts Design Guide](https://www.jf-rapid.com/blog/custom-cnc-milled-parts-design-guide.html): How geometry, tool access, workholding, datums, tolerances, material behavior and inspection affect custom CNC milled housings, brackets, tooling plates and multi-sided components.
- [Nickel-Chrome Composite Coating](https://www.jf-rapid.com/blog/nickel-chrome-composite-coating-cnc-parts.html): Bi-Protec® nickel-chrome composite coating for custom CNC parts needing combined corrosion and wear protection — aluminum, steel and complex geometries.
- [Diamond Thin Dense Chrome Coating](https://www.jf-rapid.com/blog/diamond-thin-dense-chrome-coating-cnc-parts.html): XADC® diamond thin dense chrome coating for CNC machined shafts, sleeves and tooling — wear and corrosion resistant, with dimensional planning included.
- [Custom CNC Machined Parts](https://www.jf-rapid.com/blog/custom-cnc-machined-parts.html): From drawing to component — metal and plastic, tight tolerances, surface finishing, inspection reports.
- [Custom CNC Machined Plastic Parts](https://www.jf-rapid.com/blog/custom-cnc-machined-plastic-parts.html): POM, PEEK, PTFE, nylon, PC and ABS — deformation control, tight tolerances, low-volume support.
- [How to Prepare a Custom CNC Machining RFQ](https://www.jf-rapid.com/blog/custom-cnc-machining-rfq-guide.html): Complete guide on sending 3D files, 2D drawings, material specifications, tolerances, surface finishes, and inspection requirements for accurate CNC machining quotes.
- [Custom CNC Turned Parts](https://www.jf-rapid.com/blog/custom-cnc-turned-parts.html): Shafts, bushings, sleeves, pins, spacers, adapters and threaded components — manufacturing process, material selection, threading, inspection methods, and surface finishing options.

## Company

- [Your Benefits](https://www.jf-rapid.com/your-benefits.html): Precision CNC services from prototype to series production. 10+ years operating, 1,000+ complex projects completed. 90%+ on-time delivery rate. ±0.005mm tolerance capability. NDA available. DFM analysis included.
- [FAQ](https://www.jf-rapid.com/faq.html): Answers to common questions about file formats, lead times, tolerances, materials, minimum quantities, inspection documentation, and NDA.
- [Contact & Quote](https://www.jf-rapid.com/contact.html): Request a quote by uploading drawings. Response within 2–6 hours. Email: info@jf-rapid.com. Phone: +86 755 2314 5223.

## Key Facts

- Location: Shenzhen, China (Guangdong)
- Certification: ISO 9001:2015, Reg. no. 1982QA0004R0S (CNAS/IAF, valid to January 2028)
- Minimum tolerance: ±0.003mm (turning and milling)
- Surface roughness: Ra 0.1 (turning), Ra 0.4–0.8 (milling)
- Machine stroke: up to 1000mm (5-axis), 1500mm (deep-hole drilling), 2000mm (turning + milling combined)
- Fit grades: Grade 5, 6, and 7 controlled reliably
- Minimum order quantity: 1 piece
- Maximum production volume: 10,000+ pieces
- Quote turnaround: 2–6 hours (standard), 24 hours (highly complex)
- Shipment: 95%+ via DHL Express with full tracking
- Contact: info@jf-rapid.com