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Thread-locking fluid or threadlocker is a single-component adhesive, applied to the threads of fasteners such as screws and bolts to prevent loosening, leakage, and corrosion. Most thread-locking formulas are methacrylate -based and rely on the electrochemical activity of a metal substrate to cause polymerization of the fluid.
Araldite adhesive is used to join together the two sections of carbon composite which make up the monocoque of the Lamborghini Aventador. The use of Araldite adhesive in architecture to bond thin joints of pre-cast concrete units was pioneered by Ove Arup in Coventry cathedral and the Sydney Opera House. [4]
Notched trowel is a rectangular shaped tool with regularly spaced notches along one or more sides used to apply adhesive when adhering tile, or laying synthetic floor surfaces. Other forms of trowel include: Garden trowel, a hand tool with a pointed, scoop-shaped metal blade and wooden, metal, or plastic handle.
Tackifiers are chemical compounds used in formulating adhesives to increase tack, the stickiness of the surface of the adhesive. [1] They are usually low-molecular weight compounds with high glass transition temperature. At low strain rate, they provide higher stress compliance [clarification needed], and become stiffer at higher strain rates.
In 1953, American professor Vernon K. Krieble developed anaerobic threadlocking adhesives in his basement laboratory at Trinity College in Hartford, Connecticut.Krieble's company, American Sealants, founded the Loctite brand, which was promoted as ushering in a new era of mechanical reliability by eliminating the vibrational loosening of mechanical fasteners, a frequent cause of machine ...
Self-tapping screws can be divided into two classes: [3] those that displace material (especially plastic and thin metal sheets) without removing it, known as "thread-forming" self-tapping screws, and self-tappers with sharp cutting surfaces that remove the material as they are inserted, termed "thread-cutting" self-tapping screws.
Slot screw drives have a single horizontal indentation (the slot) in the fastener head and is driven by a "common blade" or flat-bladed screwdriver.This form was the first type of screw drive to be developed, and, for centuries, it was the simplest and cheapest to make because it can just be sawed or filed.
An advertisement for a Marshalltown Trowel from 1912. The origins of Marshalltown can be traced back to the American inventor and entrepreneur Dave Lennox.While working in his machine shop in the mid-1880s in Marshalltown, Iowa, Mr. Lennox received a visit from a stonemason who asked him to make a better plastering trowel [7] while working on the construction site of the Marshall County ...