These days repair and maintenance of large machines and engines can be carried out on the site where the machine is installed. This facility to repair the machine, engine or any small or large part of the machine such as the crankshaft etc. has changed the way machines are repaired and maintained these days. Metal stitching is a way to repair cracks or fractures in different kinds of cast metals without using welding to repair the cast. On site high tech metal stitching casting repairs is now possible that would give double the strength of other known metal stitching procedures and also have superior sealing properties compared to other metal stitching systems that are in use today. Metal stitching is used in machine parts that are made of cast iron because it is very difficult to repair cast iron by welding. The advantage of using Metal stitching is that the process of metal stitching is a cold repair process that uses a series of stitching pins and locks and does not use heat that damages the cast iron parts whereas there is no other way but use heat in the welding process. Thus metal stitching does not distort the casting during the repair procedure. Where non-stressed areas of repair are involved all that is required is to stitch along the length of the crack or fracture with a series of interlocking stitching pins. In the case where stressed areas need to be repaired, toughened steel locks are used to repair and these are put at right angles to the crack or fracture at regular intervals along the entire length and divide the stitching pin line in two. All the pins and locks are fully sealed so that there is no leakage even under high pressure. Metal stitching is one of the most cost effective methods of repairing cast metal parts of machines especially when taken up on site as it avoids the necessity of dismantling the machine, transporting it and reassembling it before reinstalling it. All these procedures further subject the machine to unnecessary risk of damage. Metal stitching increases the life of metal castings since damages metal castings have only to be scrapped as they cannot be welded. It is always good to rely on established in-situ maintenance companies for repair and maintenance of machines since they use advanced techniques and superior material such as locks and pins for metal stitching and also the sealing of the locks and pins is stronger and better so that the metal casting part can be used for a much longer time. Adam Charles is an author of this article and writes about metal stitching. To know more about metal stitching , please logon to http://www.in-situ.co.uk/casestudies_metalstitching.html.
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