. Railway mechanical engineer . ided on the head for chang-ing the position of chasers in case thread- .ire t«x> tight ortoo loose. The die heads are mounted on shanks which aremade hollow for threading long pieces. The dies open auto-matically when the turret travel or may be opened atany point by stopping the feed. An internal trip may beinstalled when ordered. Dies may be closed by handles on the side or by a closing pin set for contact with the turretslide as the turret turns to the operators position. The newstyle H head also has a roughing and finishing attachmentincorporated. S
. Railway mechanical engineer . ided on the head for chang-ing the position of chasers in case thread- .ire t«x> tight ortoo loose. The die heads are mounted on shanks which aremade hollow for threading long pieces. The dies open auto-matically when the turret travel or may be opened atany point by stopping the feed. An internal trip may beinstalled when ordered. Dies may be closed by handles on the side or by a closing pin set for contact with the turretslide as the turret turns to the operators position. The newstyle H head also has a roughing and finishing attachmentincorporated. Special ring dosing, taper threading and yokeclosing attachments are available if desired. A special baseplate also is made when it is desired to attach the die headto hollow hexagon machines. Double Spindle Centering Machine MADE by the Hendey Machine Company, Torrington,Conn., the double spindle centering machine, illus-trated, was designed to meet the requirements foraccurate centering and ease and quickness of handling. The. Hendey Double Spindle Centering Machine headstock casting is large, being so made to accommodateball bearings for the spindle. The rear housing is fitted withtwo radial thrust type ball bearings which carry the sleeve of chain drive sprocket. The spindle is free to slide in thesprocket sleeve and is driven by a key in the spline. Thefront housing carries a sleeve with a taper bearing whichfurnishes a satisfactory method of taking up wear on thespindle. A locking pin for the spindle is applied to the head cast-ing but is always held in out position by means of aspring so that when it is desired to loosen the chuck by meansof the draw-in hand wheel, the pin must be manually heldin engagement with the spindle. As the pin is released whenthe operator is finished there is no danger of its remaininglocked with spindle due to oversight. The accuracy of aline-ment of the jaws is such that finished work can be centeredto within .001 in. with an eccentricitv whic
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
