. American engineer and railroad journal . /32 inch smaller tban thediameter, of the root of the thread at the point of the sleeve,and reamed with a taper reamer that has a guide on the pointwhich goes through the firebox sheet. There is a collar fastenedon the reamer at the proper place near the head which stops thereamer from going in too far, and allows 3/32 inch for thread,and makes all the holes exactly the same size. The tap has alsoa guide and a stop on it so the holes are tapped the same. Weonly use one reamer and one tap in the holes and get a perfect more than thi lo limit Bhould be
. American engineer and railroad journal . /32 inch smaller tban thediameter, of the root of the thread at the point of the sleeve,and reamed with a taper reamer that has a guide on the pointwhich goes through the firebox sheet. There is a collar fastenedon the reamer at the proper place near the head which stops thereamer from going in too far, and allows 3/32 inch for thread,and makes all the holes exactly the same size. The tap has alsoa guide and a stop on it so the holes are tapped the same. Weonly use one reamer and one tap in the holes and get a perfect more than thi lo limit Bhould be spent in order to secure the minimum 1 tivi mi nance, including all the ,1 not 1 I ual repair expenses, labor, and material, but also interi iation, insurance and taxes upon the plant provided, 1 qui tion that should have the most carefulconsideration. The following analysis of the total cost will serve to indicatethe relative importance of the decisions that must be reached inorder to give each dollar expended a maximum earning DEVICE FOR HOLDING ON IN RIVETING FLEXIBLE STAYBOLTS. thread. The sleeves are screwed in with a stud nut, driven witha ratchet lever. The bolts are run in with an air drill until theyare nearly home, then adjusted carefully by hand, taking careto get an equal load on all the bolts without pulling the fireboxsheet out of line. While riveting the bolt we have a simple device for holdingon which may be new to some of you. It obviates all dangerof spoiling the thread on the sleeve. It consists of a nipplewhich is screwed on to the sleeve, and has a sliding plunger in-side which fits on the head of the bolt. The holding on is doneby a common holding on sledge which backs up on the outsideend of the plunger. An order of 60 boilers for the WabashRailroad recently completed had 298 flexible staybolts in each,making a total of 17,880 bolts. The inspector would not permitany calking on the sleeves, but only 10 of them had to be re-newed because of leak
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
