Features of Depth-micrometer
DEPTH MICROMETERS . name the parts of a depth micrometers . the constructional features of a depth micrometer Constructional features The depth micrometers consists of a stock on which a graduated sleeves is fitted. The other end of the sleeve is treaded with a 0.5mm pitch 'V' thread. A thimble which is internally threaded to the same pitch and form, mates with the threaded sleeve and slides over it. The other end of the thimble had an external step machined and threaded to accommodate a thimble cap. A set of extension rods is generally supplied. On each of them the range of sizes that can be measured with that rod, is engraved as 0-25,25-50,50-75,75-100,100-125 and 125-150. The extension rods can be inserted inside the thimble and the sleeve. The extension rods have a collar-head which helps the rod to be held firmly. The measuring faces of the stock and the rods are hardened, tempered and ground. The measuring face of the stock is perfectly machined flat. The extension ro...