Bolted joints are often tightened to 75% to 80% of bolt proof load. This amount of tightening, a rule of thumb, is suitable for many joints, but in some cases, external tensile loads can reduce bolt clamping force to zero....More
When building circuit boards and electronics, fastening and connecting hardware is often selected more because it's handy than because it's the best choice. Here's a look at some hardware and tips for getting the most out of them.
How can one benefit by using wave springs in place of coil springs? What types of wave springs are available? What materials do wave springs come in? What design benefits do wave springs offer that will help maximize the efficiency of the engineering design?
Download FAQs on Wave Springs sponsored by Rotor Clip to get the answers to these questions and more....More
If engineers choose the wrong rivets or install them improperly, the advantages of low-cost and rapid assembly go right out the window. Factors that influence rivet performance include shank length and diameter, location and hole, and workpiece preparation.
Self-tapping screws are usually drilled into pre-made holes (pilot holes) in metals, such as zinc, aluminum, and bronze and its alloys, as well as plastics and resin-impregnated plywood. Here are 15 that you should know.
Tamper-resistant or security fasteners are often used to prevent unauthorized entry. They are often non-removable or require a special tool to remove them. Higher-quality tamper-proof fasteners have hardened heads, making it difficult to form a new drive slot with a file.
A major cause of failures in metal fasteners is electrochemical corrosion (rust), or so-called galvanic action. Engineers and designers alike can greatly reduce this type of corrosion by specifying fasteners made of the proper materials or with the right coatings....More