As projects grow, parts must fit together reliably. Designing for assembly is where many 3D prints fail.

Snap Fits in 3D Printing

Snap fits rely on controlled flex.

Best practices:

• Use PETG or nylon (not PLA)
• Avoid sharp internal corners
• Design generous lead-in angles
• Test multiple tolerances

Printed snap fits should flex once not repeatedly.

Press Fits and Interference

Press fits require extremely careful tolerancing.

Guidelines:

• Start with 0.1–0.2 mm interference
• Test with small calibration prints
• Account for material shrinkage

Never assume theoretical dimensions will work first time.

Modular Design Benefits

Breaking designs into modules allows:

• Easier printing
• Better orientation
• Reduced support
• Improved repairability

Fastening options include:

• Screws with heat-set inserts
• Pins and dowels
• Adhesives (epoxy, CA glue)

Tolerance Stacking

Multiple small inaccuracies add up.

Avoid:

• Long chains of mating parts
• Tight tolerances across many components
• Single-point failure designs

Instead, design adjustment points.

Professional Assembly Support

BritForge3D regularly prints:

• Multi-part assemblies
• Mechanical enclosures
• Functional prototypes

We can advise on fit, tolerance, and assembly strategy before printing.

Upload your project at BritForge 3D

What You Need to Know

If you’re new to 3D printing, you’re not alone it’s one of the most exciting and accessible manufacturing technologies of the 21st century. In this beginner-friendly guide from BritForge 3D, we’ll walk you through the basics of how it works, the materials used, common applications, and how to get started quickly without needing your own printer!

What Is 3D Printing?

3D printing, also known as additive manufacturing, is the process of creating a physical object from a digital model by building it up layer by layer. Unlike traditional subtractive methods (cutting, drilling), 3D printing adds material only where it’s needed making it cost-effective and precise.

How Does It Work?

1. Design: Create or download a 3D model (usually in STL format).
2. Slice: The model is sliced into layers using slicing software.
3. Print: The printer lays down each layer until the object is complete.

Popular 3D Printing Methods

• FDM (Fused Deposition Modelling): Uses thermoplastic filament. Great for strong, functional parts.
• SLA/DLP (Resin Printing): Uses liquid resin cured by light. Best for ultra-fine details and smooth finishes.

What Materials Are Used?

Beginner-friendly 3D prints typically use:

• PLA: Easy to print, biodegradable, great for models and prototypes.
• PETG: Strong and durable, ideal for functional parts.
• Resin: High detail, best for miniatures or jewellery.

Common Uses of 3D Printing

• Prototyping and product development
• Custom tools, brackets, and mechanical parts
• Educational models and STEM teaching
• Hobbyist projects and tabletop miniatures

Why You Don’t Need Your Own 3D Printer

While home printers are popular, you don’t need to buy or maintain one yourself. Services like BritForge 3D let you upload a file, choose materials, and have a professional-quality part delivered to your door no technical knowledge required.

Tips for 3D Printing Beginners

• Start with simple, solid models without thin walls or complex overhangs
• Use free libraries like Thingiverse or Printables
• Check model scale (usually in mm)
• Consider the part’s purpose before choosing a material

How BritForge 3D Can Help

We work with both beginners and professionals to bring ideas to life. Whether you’re printing your first design or need guidance choosing a material, our team is here to help. Just upload your file or send us a message and we’ll take care of the rest.

Conclusion

3D printing is transforming how we design and make things. As a beginner, you’re entering a world of endless creativity and customisation. With the right guidance and support, anyone can turn a digital idea into a physical object and BritForge 3D is here to help you every step of the way.

Which Is Right for Your Project?

When choosing a 3D printing method for your next project, the two most common technologies you’ll encounter are FDM (Fused Deposition Modeling) and Resin Printing. Both offer unique advantages, and selecting the right one can make all the difference in quality, cost, and turnaround time.

What Is FDM 3D Printing?

FDM printing uses melted thermoplastic filament (like PLA, PETG, or ABS), which is layered onto a build plate to form your object. It’s widely used due to its affordability and ability to create strong, functional parts.

• Best for: Prototypes, mechanical parts, enclosures
• Material choices: PLA, PETG, ABS, TPU
• Pros: Cost-effective, durable, large part sizes
• Cons: Less detailed finish, visible layer lines

What Is Resin 3D Printing?

Resin printing (SLA or MSLA) cures liquid resin with UV light to create highly detailed prints. It’s ideal for small, intricate models like miniatures or dental molds.

• Best for: Miniatures, models, dental parts, jewellery
• Material choices: Standard resin, flexible resin, high-temp resin
• Pros: High detail, smooth surfaces, precision
• Cons: Brittle, messy post-processing, more expensive

FDM vs Resin: A Side-by-Side Comparison

Feature	FDM	Resin
Detail Level	Moderate	High
Durability	Strong	Brittle
Cost	Lower	Higher
Post-Processing	Simple	Messy / Needs curing
Size Limits	Large builds	Small precision

Which One Should You Choose?

If you need a durable prototype or mechanical part, FDM is likely your best bet. But if your design demands intricate detail or surface smoothness, resin printing is the way to go.

At BritForge 3D, we offer only FDM printing so to ensure you get the right solution for your needs please feelfree to Contact us and we’ll help you choose the correct method based on your design and purpose.

Get Started Today

Upload your 3D model and get an instant quote fast, professional 3D printing from a trusted UK supplier. Click here to upload your file.

Before uploading your design for 3D printing, it’s crucial to ensure your STL file is clean, watertight, and printable. Here’s a simple step-by-step guide to help you prepare your file for the best results.

1. Export Your Model to STL Format

Most CAD software can export to STL. Ensure you choose the right resolution — too low and your model looks blocky; too high and the file may be too large.

2. Check for Common Errors

• Non-manifold edges
• Holes or flipped normals
• Unwanted internal faces

3. Repair Your File

Use tools like Netfabb, Meshmixer, or Microsoft 3D Builder to automatically fix file errors before submitting.

4. Scale and Orient

Make sure the size matches your desired output and the orientation is optimal for your print goal.

5. Upload with Confidence

Once your file is ready, head to BritForge3D.co.uk and upload your STL to get an instant quote and professional results.