High-Quality Rivets for CNC Machines(different types of casting Scott)

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Rivets are a crucial component in many manufacturing and construction projects. While rivets may seem simple, using high-quality rivets on CNC machines can make a big difference in the strength and durability of the final product. In this article, we’ll look at what makes a quality rivet, the role of rivets in CNC projects, and how to select the best rivets for your CNC machine setup.
What Makes a Quality Rivet?
A rivet is a mechanical fastener that connects two or more pieces of material by inserting a metal rod through aligned holes in the pieces and deforming the protruding ends. While conceptually simple, rivets come in many styles, materials, and dimensions. Three factors determine rivet quality:
- Strength - A quality rivet must be strong enough to withstand shear and tensile stresses without failing. Strength comes from the rivet material and design.
- Durability - Good rivets maintain strength after repeated loads and exposure to weather, chemicals, vibration, and other conditions. Durability comes from coatings and material choice.
- Precision - The best rivets have a shaft diameter that closely matches the hole size to provide a tight fit. Precision sizing allows optimal load transfer.
Quality rivets are made from strong, durable materials that resist corrosion and wear. Common materials include various steel alloys, aluminum, copper, nickel, and Monel. Steel rivets provide high shear strength, while softer aluminum and copper rivets create a tighter fit. The best rivets use a material matched to the application.
Proper heat treating and coatings like zinc electroplating further enhance strength and corrosion resistance. Precision-machined rivets ensure consistent sizing and quality control. Reputable manufacturers test rivets to guarantee they meet established standards.
Role of Rivets in CNC Projects
CNC machining utilizes computer numerically controlled tools to automate fabrication processes like milling, turning, and drilling. Rivets play an integral role in CNC projects by providing a fast, versatile method for joining.

Here are some typical applications for rivets in CNC work:
- Metal fabrication - Riveting sheets, brackets, frames, and other assemblies
- Machinery construction - Interconnecting parts like gears, bearings, and motors
- Sheet metal enclosures - Attaching panels, covers, and compartments
- Electronics assemblies - Mounting circuit boards, chassis, and components
- Aircraft production - Connecting stringers, ribs, skins, and fittings
Riveting offers benefits over other fastening methods like welding and screwing. It is quick, inexpensive, and requires no special skills. Riveted joints have vibration damping and can be disassembled if needed. Weight-sensitive applications like aircraft rely heavily on rivets.
Proper rivet selection and installation are critical to gain these benefits. Using subpar or incorrect rivets can lead to loose connections, distortion, and premature failure.
Choosing Quality Rivets for CNC
With an understanding of what constitutes a quality rivet, let’s look at how to pick the right rivet style, material, and size for your CNC application:
- Consider the joint design - Will it be single or double shear? What shear and tensile loads will it see? High loads need large, strong rivets.
- Choose a suitable rivet type - Options like universal head, countersunk, modified, blind, and specialty rivets have different strengths and uses.
- Select a rivet material that matches the base materials - Softer materials usually need softer rivets to prevent cracking. Harder materials take harder, stronger rivets.
- Size the rivet length allowing for material thickness - The rivet should fill 60-70% of the combined material thickness.
- Use the same diameter as the drilled hole - Smaller rivets won’t fill the hole properly. Larger rivets could split the material.
- Consult manufacturers' specs - Reputable suppliers provide load ratings, materials, and usage guidelines.
- Order from quality brands - Respected manufacturers like Cherry Aerospace, Avdel, and LISI Aerospace produce consistent, high-end rivets.
- Check certifications - Look for companies approved to supply aerospace, military, automotive, and other regulated industries.
Proper CNC Riveting Technique
Once you’ve selected suitable rivets, following the right techniques ensures proper installation:
- Use the recommended drill size for the rivet diameter to get a close fit. CNC precision helps here.
- Countersink holes for flush rivets. Set depth to about 1.5 x rivet head diameter.
- Ensure material layers are tightly clamped before driving the rivet.
- Use recommended driver force and an appropriate nosepiece to form the shop head.
- Inspect rivets after installation and rework any loose, damaged, or misformed connections.
- Apply sealant for watertight joints if needed. This helps prevent corrosion.
Quality rivets, conscientious design, and proper CNC installation techniques combine to produce robust, long-lasting riveted assemblies. The precision and automation of CNC machines enable fast, reliable riveting even for complex parts and large production runs. Investing in top-tier rivets optimized for the application is well worth the cost for critical projects. CNC Milling