Connecting Rod Bolts

Connecting Rod Bolts<h1>Connecting Rod Bolts</h1> Connecting rod bolts are the fasteners that connect the piston assembly to the crankshaft. Bottom end connecting rod bolts hold the two sides of the bottom end bearing together. The connecting rod bolts should be subjected to at least two tightening procedures throughout the engine's productive cycle and should thus be built to ensure a more consistent distribution of the axial load. To provide optimum strength and to enable for safe fastening, fine threads having a close pitch are selected. Mostly rod bolts are manufactured to offer great toughness by having a considerable amount of the bolt's body converted to a diameter less than that of thread's root diameter. As a result, excluding the ends and the central part the whole body is manufactured to the smaller diameter. The material used for making connecting rod bolts is generally steel, stainless steel and aluminium materials. Rod bolts are subjected to stresses such as tensile stress, fluctuating tensile stress, shear stress and bending stress. Bolt failure may be reduced with regular maintenance and inspection. In order to avoid the connecting rod bolt from becoming distorted or damaged as a result of faulty assembly, prior to the installation cleaning and thorough visual examination, as well as testing with a bolt and nuts, must be implemented to verify that there is no blocking or breaking. There must be proper measures taken in order to keep rod bolts in good condition. To prevent stress raisers, the bolt is given an excellent surface polish, also poor handling should be avoided otherwise it could harm the bolt surface. After specific time interval even though the rod bolts are working in good condition, they are changed to avoid breaking down of bolts due to tension and fatigue. Proper cleaning of bolts and applying lubricating oil is very important. Bolts must be tightened in compliance with the prescribed guidelines. To keep the stress variation minimal, a large level of penetration is used during tightening. During tightening, use the appropriate lubrication on the head as recommended by the manufacturer. Connecting rod bolts should not be tightened too much as it can cause irreversible distortion of bolts, therefore, fitting of the bolts should be carried out according to the manual so that no adverse effects are seen on the connecting rod bolts. References: 1. <a href="http://www.tpub.com/engine3/en3-52.htm ">tpub.com</a> 2.<a href="https://www.brighthubengineering.com/marine-engines-machinery/74087-operating-faults-in-connecting-rod-bolts">brighthubengineering</a>