Eye BoltsĮye bolts have a thread at one end and a loop at the other end. They can be used with a nut at one or both ends, with the other end mating with a hole that has a respective thread size. The main difference between the two is that a double end bolt has a thread in both ends instead of having it for the whole length of the piece. This type of bolt resembles a simple threaded rod. A single adjustable wrench is all one needs to fasten or unfasten many different sizes of hex head bolts and nuts but this should not be made common practice. Socket set may be used to reach bolts in difficult to reach areas. Regular spanners are affordable and easy to use. The tools needed are also quite commonly available. Hex head bolts are extensively used in machinery as they are easy to assemble and disassemble.
Partially threaded bolts deliver a higher shearing capacity. Hex head bolts have machine threads extending halfway or all the way up to the bolt head. This is especially important for bolts fastened in difficult to reach spots. The six sides offer a good granularity of angles to approach the bolt from. Hex head bolts have the bolt head in the shape of a hexagon and can be tightened easily using a wrench. Let’s take a look at some popular bolts types. There are many different types of bolts to choose from. Sometimes, one of the parts has a threaded hole to replace the bolt and minimise the number of components. The bolt is normally fastened with a nut on the other end. A bolt has external male threads on one end and a hexagonal head on the other. These machine elements are usually used to hold two unthreaded components together. Bolt Typesīolts are the most common type of fasteners. In this article, we shall learn about the different types of fasteners available for use. But when they are in place, they hold steady under the most ruthless conditions provided they are tightened up to the recommended torque. The term only refers to the fact that they allow the parts to be separated for maintenance/inspection purposes. In fact, hydraulic studs and bolts (a type of non-permanent fastener) are used in some of the most intensive applications. The term “non-permanent” does not mean that the joint is weak. For example, rivets and some types of couplings are permanent and cannot be removed and reused once in place.
IX Inserts Permanent vs Non-Permanent FastenersĪs the name suggests, fasteners may be broadly classified as permanent and non-permanent fasteners. Their sole purpose is holding machine parts in place against excess vibration, force and pressures while maintaining the possibility of easy disassembly in case of non-permanent fasteners. The sometimes extreme forces combined with the necessary flexibility means that a high degree of variability is required from the different types of fasteners. As a result, it is necessary to secure machinery components using non-permanent means. The design must be such that engineers and technicians can access and dismantle as many parts as necessary to service, repair, or replace them.
Any machinery requires certain maintenance routines after specified running hours. As such, the machine must be capable of handling extreme forces for long periods.Īnother thing to keep in mind during the product design phase is the ease of maintenance. That translates to 60 explosions per second in a two-stroke engine or 30 explosions per second in a four-stroke engine. Internal combustion engines of generators, for example, have controlled explosions taking place in the engine cylinders with rates up to 3600 rpm. Modern machinery is a marvel of engineering.
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