als like metal, this system works great. For softer materials like plastic and fiberglass, the expanding ball can pull through the hole, defeating the grip of the rivet.
Backside of bulb-type rivets showing the “petals” expanded for grip.
Look carefully at a bulb-type rivet, and you can see the “petals” that will expand from the side as the rivet is pulled.
62
KITPLANES August 2018
Jon CROKE
Bulb-type rivets appear like normal blind rivets prior to installation.
As the founder of Homebuilt HELP.com, Jon Croke has produced instructional videos for experimental aircraft builders for over 10 years. He has built (and helped others build) over a dozen kit aircraft of all makes and models. Jon is a private pilot and currently owns and flies a Zenith Cruzer.
When it comes time to attach a plastic or fiberglass wing tip to the end of a metal wing, we sometimes grab a blind rivet to do the job. This same fastener that is used to rivet our metal skins together might not be the best for this purpose. Close examination of using these rivets to bond soft and hard materials together reveals some problems. When a blind rivet is pulled during installation, the blind end expands into a small ball that prevents it from pulling through the material. For strong materials like metal, this system works great. For softer materials like plastic and fiberglass, the expanding ball can pull through the hole, defeating the grip of the rivet. The force of the expanding ball can also crack some materials. One method to prevent this problem is to use metal backing washers for reinforcement. This works fine as long as you have access to the backside of the material. Otherwise, you may need to glue these washers in place prior to rivet installation. Every builder should know there is a unique style of rivet that can alleviate the need to install washers when working with soft materials. These rivets are made entirely from aluminum, which makes them softer. But more importantly, the expanding ball is replaced with large protruding “petals” that provide a greater surface area for holding. The petals extend automatically during the regular riveting process. These rivets can be found at McMasterCarr (www.mcmaster.com) with the name “Wide-Grip Blind Rivets for Soft Materials.” However, they are also known as bulbstyle rivets, and this term works much better when searching the McMaster-Carr website. They are available in 1/8-, 5/32-, and 3/16-inch diameter sizes. You need to determine the grip length you want (the thickness of all materials to be held together) to arrive at the exact part number. Keep a box of these handy, and next time you need to attach plastic, fiberglass, or rubber (engine baffling), you will be using a great fastener for the job! J Photos: Jon Croke
long limited the use of flush rivets to as ... time than with their money. .... metal project without the aid of this tool. ... 2} PLASTIC TAPE OVER RIVET HEADS.
As with all other facets of riveting, practice using this tool on scrap that is identical to the material you ulti- mately want to work on. It takes practiceâand patience.
Rosie the Riveter used during. World War II. Designers have made some progress in rivet gun ergonomics and reduced the vibration in bucking bars to enhance ...
shear strength with joint bearing strength, and minimizes the number of holes (and rivets) in a rivet pattern. Immediately, the second question is, "How many riv-.
Philip King BSc. Robert Cather BSc ... British Cement Association, Wexham Springs, Slough, Berks. SL3 6PL. .... A wide range of cement specifications are.
Rab. Coudre 2 ensemble de yeux/oreilles ens. Oreilles du chaton (faire 4 identique). Trav de ** Ã ** comme pour les yeux de grenouille/oreilles de cochonnet.
Distribue le contenu des cartouches Soft Care® de 600 mL de savon liquide pour les mains. • Permet des réglages d'écoulement de produit de 0,75 à 1,2 mL.
per poussée. ▻ Conçu pour ne pas fuir et ne pas goutter. ▻ Barre facile à pousser pouvant être actionnée d'une main, utilisable même par des personnes ...
residue content. Can be placed directly into 800°C. Good reactivity and low viscosity. High accuracy. Ability to produce sharp edges parts. Outstanding burnout.
Le savon lotion Soft Care® est un savon riche, rose nacre, convenant dans tous les secteurs. Sa formule douce laisse les mains sentant le propre et le frais. Il.
S'utilise comme produit de lavage pour les cheveux ... Le produit de lavage pour les cheveux et le corps Soft Care® est une formule ... Couleur/Forme.
