Locomotive boiler construction; a practical treatise for boilermakers, boiler users and inspectors .. . We now come to the subject of shearing. There isscarcely a sheet that does not require some shearing workdone upon it at some time during the process of con-struction. The work should always be laid out in such a. Figure 73 The Deny Collard Co. Ordinary boiler-shop shear. way that the stock can be removed by planing, shearingonly being resorted to where the amount of stock is toomuch to be planed off. Fig. 73 shows the common ar- Shears for various purposes. rangement of a boiler shop shear.
Locomotive boiler construction; a practical treatise for boilermakers, boiler users and inspectors .. . We now come to the subject of shearing. There isscarcely a sheet that does not require some shearing workdone upon it at some time during the process of con-struction. The work should always be laid out in such a. Figure 73 The Deny Collard Co. Ordinary boiler-shop shear. way that the stock can be removed by planing, shearingonly being resorted to where the amount of stock is toomuch to be planed off. Fig. 73 shows the common ar- Shears for various purposes. rangement of a boiler shop shear. The upper and lowershear blades T and B are made of tool steel and blade should always be allowed to lap a distance at L,which is usually about a quarter of an inch when the headof the machine is in its highest position. As soon as theblades wear down so that they will not lap at L, theyshould be packed up; an adjustment always being pro-
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Keywords: ., bookcentury1900, bookdecade1910, bookidlocomotivebo, bookyear1912
