TESTING CRANK SHAFTS.
When, an engine is built, one of the items to be tested is whether the crank shaft is m strict alignment; and m order to ensure the satisfactory running of the engine, tests with a similar object, be made periodically. A British engineering firm recently introduced a new instrument for making such tests accurately and rapidly. It consists of a dial divided into thousandths of an inch and a pointer actuated by a plunger which juts out at the? top of the dial. Flanking this plunger are two spring plungers ; the dial is carried on a column which " screws into a base. The apparatus is used — m a manner which cannot be described without technical details— to measure the distance between the inner faces of the crank balance weights or of the outer ends of the crank webs*,, first when the shaft is m one position* and next when it has been moved through half a revolution. If the pointer shows a movement to one side or the other it proves that the alignment is not perfect. This instrument is made either non-adjustable, for only one size of crank shaft, or adjustable for any sizes, m which the distance between the web is not less than 4's inches or more than 9$ inches. It can be used for either horizontal or vertical engines.
Permanent link to this item
https://paperspast.natlib.govt.nz/newspapers/AG19210623.2.46
Bibliographic details
Ashburton Guardian, Volume XLI, Issue 9543, 23 June 1921, Page 6
Word Count
226TESTING CRANK SHAFTS. Ashburton Guardian, Volume XLI, Issue 9543, 23 June 1921, Page 6
Using This Item
Ashburton Guardian Ltd is the copyright owner for the Ashburton Guardian. You can reproduce in-copyright material from this newspaper for non-commercial use under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International licence (CC BY-NC-SA 4.0). This newspaper is not available for commercial use without the consent of Ashburton Guardian Ltd. For advice on reproduction of out-of-copyright material from this newspaper, please refer to the Copyright guide.
Log in