. Railway mechanical engineer . Potter & Johnston Universal Shaper. Rear View Showing Motor Drive screw. The weight of these parts is carried on a ball bear- single pulley drive. When motor drive is desired, a surrounding the elevating screw. constant speed motor is recommended, the drive being The gear provided with the shaper is a unit with the through a silent chain. Snap Thread Gages for Accurate Inspection ASXAP thread gage for accurate inspection of numer- thread gages are made in sizes from 4 in. to 3 in. and withous threaded parts has been developed by the Herr- a variati
. Railway mechanical engineer . Potter & Johnston Universal Shaper. Rear View Showing Motor Drive screw. The weight of these parts is carried on a ball bear- single pulley drive. When motor drive is desired, a surrounding the elevating screw. constant speed motor is recommended, the drive being The gear provided with the shaper is a unit with the through a silent chain. Snap Thread Gages for Accurate Inspection ASXAP thread gage for accurate inspection of numer- thread gages are made in sizes from 4 in. to 3 in. and withous threaded parts has been developed by the Herr- a variation of pitch from 8 to 27. mann Gauge Company, Detroit, Alich. This gage is The snap gage designed for use as a limit gage is shown shown in Fig. 1, which also indicates the adjustable jaws, in Fig. 2. Thi^s tool can be used to good advantage in test- For many purposes the snap thread gage has important ad- __ vantages over the plug type thread gage. Its use eliminatesthe necessity of catching the thread and screwing the workinto the gage and with the snap gage, a
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
