# FAQ | Manufacturing Questions & Answers

> Find answers to frequently asked questions about CNC machining, rapid prototyping, injection molding, materials, and manufacturing services. Expert insights from Sinbo Precision.

https://www.sinbo-machining.com/resources/faq/

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## On This Page

- General Questions
- CNC Machining
- Materials
- Injection Molding
- Quality & Standards
- Ordering & Shipping
- Start Your Manufacturing Project Today

[Manufacturing FAQ]
# Frequently Asked Questions
Everything you need to know about precision manufacturing, materials, and our services
## General Questions
We offer comprehensive precision manufacturing services including: - CNC Machining: 3-axis, 4-axis, and 5-axis precision machining for metals and plastics
- Rapid Prototyping: Fast-turnaround prototype development for testing and validation
- Injection Molding: High-volume plastic part production with various materials
- Powder Metallurgy: Complex metal parts through PM and MIM processes
- Metal 3D Printing: Additive manufacturing for complex geometries
- Surface Treatment: Anodizing, plating, heat treatment, and coating services
We serve a wide range of industries including: Automotive & Transportation Medical & Healthcare Robotics & Automation Electronics & Semiconductor Aerospace & Aviation New Energy & Environmental Industrial Equipment Consumer Products
## CNC Machining
Our CNC machining capabilities include: - Standard Tolerances: ±0.025mm (±0.001 inch)
- Precision Tolerances: ±0.005mm (±0.0002 inch)
- Positional Accuracy: ±0.01mm
- Surface Finish: Ra 0.8 - 3.2 μm (32 - 125 μin)
- Geometric Tolerancing: Full GD&T capabilities
Tight tolerances depend on material selection, part geometry, and specific requirements. Contact our engineers for detailed specifications. We accept the following file formats:
#### 3D CAD Files:
- • STEP (.step, .stp)
- • IGES (.igs, .iges)
- • SolidWorks (.sldprt, .sldasm)
- • Parasolid (.x_t, .x_b)
- • ACIS (.sat)

#### 2D Drawings:
- • PDF (.pdf)
- • AutoCAD (.dwg, .dxf)
- • SolidWorks Drawing (.slddrw)
Tip: Include 2D drawings with GD&T callouts for precise tolerance specifications. Lead times vary based on complexity and quantity: Prototypes (1-10 pieces): 3-7 business days Low Volume (10-100 pieces): 7-14 business days Medium Volume (100-1000 pieces): 2-4 weeks High Volume (1000+ pieces): 4-8 weeks Rush services available for urgent projects. Contact us for specific timeline requirements.
## Materials
We work with a comprehensive range of materials:
#### Metals:
- • Aluminum (6061, 7075)
- • Steel (1018, 4140, Stainless)
- • Titanium (Grade 2, 5, 23)
- • Copper & Brass
- • Inconel & Titanium Alloys

#### Plastics:
- • PEEK & PTFE
- • ABS & Polycarbonate
- • Nylon & Acetal
- • Acrylic & PVC
- • Carbon Fiber Composites

#### Specialty:
- • Ceramics
- • Foam Materials
- • Wood & Composites
- • Rubber & Elastomers
- • Custom Materials
Consider these key factors when selecting materials:
#### Mechanical Requirements
- • Strength and hardness requirements
- • Wear resistance needs
- • Fatigue life considerations
- • Weight limitations

#### Environmental Factors
- • Operating temperature range
- • Chemical exposure
- • Humidity and moisture
- • UV radiation exposure

#### Cost & Manufacturability
- • Budget constraints
- • Machinability and tooling requirements
- • Surface treatment needs
- • Regulatory compliance
Our engineering team can provide material recommendations based on your specific requirements.
## Injection Molding
Our injection molding MOQ structure: - Prototype Molds: 50-500 pieces using aluminum or soft steel molds
- Production Molds: 1,000+ pieces using hardened steel molds
- Family Molds: Multiple parts, 500+ pieces per part
- Bridge Tooling: 100-10,000 pieces for market testing
We also offer rapid prototyping services for quantities under 50 pieces using alternative methods. Mold development timelines: Rapid Prototype Mold: 2-3 weeks Standard Production Mold: 4-6 weeks Complex Multi-Cavity Mold: 6-8 weeks High-Precision Mold: 8-12 weeks Timeline includes design review, material procurement, machining, heat treatment, and testing phases.
## Quality & Standards
We maintain comprehensive quality certifications:
#### Quality Management
- • ISO 9001:2015:2015 Certified
- • IATF 16949:2016:2016 (Automotive)
- • AS9100 (Aerospace)
- • ISO 13485 (Medical)

#### Compliance
- • ISO 14001:2015:2015 (Environmental)
- • SA 8000:2014:2014 (Social Responsibility)
- • REACH & RoHS Compliance
- • ITAR Registration
Our comprehensive quality control includes:
#### Dimensional Inspection:
- • CMM (Coordinate Measuring Machine)
- • Optical Comparators
- • Laser Scanning
- • Digital Calipers & Micrometers

#### Material Testing:
- • Spectrometer Analysis
- • Hardness Testing
- • Tensile Strength Testing
- • Surface Roughness Measurement

#### Specialized Testing:
- • X-Ray Inspection
- • Dye Penetrant Testing
- • Ultrasonic Testing
- • 3D Scanning & Reverse Engineering

## Ordering & Shipping
Getting a quote is simple: 1- Submit Your Files: Upload your CAD files and 2D drawings through our website or email
1- Provide Specifications: Include material, quantity, tolerance, and surface finish requirements
1- Technical Review: Our engineers review your project for manufacturability
1- Receive Quote: Get detailed pricing and lead time within 24-48 hours
1- Confirm Order: Approve the quote and we'll begin production
[Quick Quote: Call +86 183 1987 0026 ](tel:+86 183 1987 0026)for immediate assistance with urgent projects. We offer flexible shipping solutions:
#### International Shipping:
- • DHL Express (2-5 days)
- • FedEx International (3-7 days)
- • UPS Worldwide Express (2-5 days)
- • Air Freight (5-10 days)
- • Ocean Freight (15-30 days)

#### Domestic Options:
- • Express Next-Day Delivery
- • Standard 2-3 Day Delivery
- • Economy Ground Shipping
- • Customer Pickup Available
- • Consolidated Shipping
We provide tracking information for all shipments and handle all customs documentation for international orders. We accept various payment methods: - Wire Transfer (T/T): Most common for international orders
- Credit Cards: Visa, MasterCard, American Express
- PayPal: For smaller orders and prototypes
- Alipay: Convenient for Asian customers
- Company Checks: For established customers with credit terms
- Letter of Credit (L/C): For large international orders
Payment terms: 50% deposit with order confirmation, 50% balance before shipment. Net 30 terms available for qualified customers.
## Start Your Manufacturing Project Today
Get in touch with our experts for professional consultation and competitive quotes [Get Quote ](https://www.sinbo-machining.com/quote/)[Consult Expert ](https://www.sinbo-machining.com/contact/)