Blind Rivet Terms
GOEBEL BLIND RIVETS
To join two pieces of material, the body of the rivet is inserted into a pre-drilled hole, then a nail rivet tool is used to pull the top of the mandrel to expand the body, clamping the two materials together. The force of the rivet tool then pops off the mandrel, leaving behind the domed head blind rivet.
Standard blind rivets can be placed on components that are accessible on one side or on two sides.
Applications: Containers/tanks, hollow body, tubes, profiles, air ducts and many others.
Characteristics: Economical • versatile • strong • secure
Aluminium – Lightweight with good corrosion resistance.
Steel – Stronger than Aluminium with a “flash” coating of Zinc. Low corrosion resistance.
Stainless Steel A2 – Good Strength and excellent corrosion resistance.
Stainless Steel A4 – Good Strength and increased corrosion resistance
Copper – Relatively soft. Excellent corrosion resistance and conductivity.
Monel – The strongest blind rivet material with excellent corrosion resistance and conductivity. Also excellent high temperature suitability.
Open End “STANDARD”
General purpose rivet available in a wide range of materials and head styles. Suitable for applications with normal load bearing requirements. By far the most commonly used style of blind rivet due to the ease of use and low initial cost.
- Dome Head
The Dome Headed or sometimes called Round head blind rivet is the most versatile and commonly used type whose lower profile head is approx. twice the diameter of the rivet body.
This provides adequate bearing surface for nearly all applications where metals are being joined.
Available in many material combinations.
Aluminium-Steel – Lightweight and inexpensive. Easily available. Has low strength. Rivets can tear/fail with load.
Aluminium-Aluminium – Extremely lightweight and useful for Aerospace applications. Low strength. Usage must be carefully planned for load.
Aluminium – Stainless Steel – This combination has excellent corrosion resistance and better strength. Offers a flexible option for many situations.
Steel-Steel – Good strength and relatively low cost of rivet. As the rivet body is Steel they are subject to corrosion.
Stainless Steel – Stainless Steel – Has excellent corrosion resistance and high strength. Rivets are relative expensive and require stronger tools for installation.
Stainless Steel – Steel – This combination permits easier installation because the steel mandrel breaks easily compared to an SS one. Reduced cost as compared with SS mandrel.
Copper-Steel – Use where electrical conductivity is required.
MONEL- Stainless Steel – High Strength, corrosion resistance and temperature resistance. Useful in Aerospace and high temperature service applications
Watch Blind Rivet installation below.
LARGE FLANGE DOME HEAD BLIND RIVETS
The large flange blind rivets are very useful for joining low density materials. In particular when the softer material is on the front side, the large flange spreads the load over a larger area and prevents the rivet from penetrating the material.
Used extensively for fixing exterior composite panels – generally known as Fundermax after the company that pioneered these laminates.
Also available as Epoxy head painted option with a number of colours.
Material USAGE GUIDE.
Galvanic Corrosion • When dissimilar metals come into contact in the presence of an electrolyte, a galvanic action occurs which corrodes one metal at a faster rate and the other more slowly. This phenomenon can cause major riveted joint failures and care must be taken to avoid the occurrence. The following table is a guide.
|RIVET MATERIAL↓||Aluminium||Coated Steel||Stainless Steel||Copper||Brass|
|NO||Incompatible – Avoid contact with each other|
|CARE||Use with care. Painting metals will help|
1) Select materials that are as close together as possible in the Galvanic Series Chart.
2) Provide a barrier between the two metals, such as paint, non-metallic washer or gaskets.
3) Design the fastener as the cathode so the cathodic area is small as compared to the anodic area.
4) Use a metallic finish on the fastener that is close on the chart to the mating material.