The Practical Metal Workers Assistant With the Application of the Art of E
The Practical Metal Workers Assistant With the Application of the Art of E
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In our eReader you can find the full English version of the book. Read The Practical Metal Workers Assistant With the Application of the Art of E Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book The Practical Metal Workers Assistant With the Application of the Art of E
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Un- wound in the act of drilling a hole when the brace is moved round in the usual direction, which agrees with the path of a left hand screw. The cutting motion produces no change in the length of the instrument, and the screw being held at rest for a moment during the revolution, sets in the cut ; but towards the last, the feed is discontinued, as the elasticity of the brace and work suffice for the reduced pressure required when the drill is nearly through, and sometimes the screw is unwound... still more to reduce it.
The lever-drill, Fig. 398, differs from the latter figure in many respects ; it is much stronger, and applicable to larger holes ; the drill socket is sufficiently long to be cut into the left hand screw, and the piece serving as the screwed nut, is a loop terminating in the centre point. The increased length of the lever gives much greater purchase than in the crank-formed braxje, and in addition the lever-brace may be applied close against a surface where the crank-brace cannot be turned round ; in this case the lever is only moved a half circle at a time, and is then slid through for a new purchase, or sometimes a spanner or wrench is applied directly upon the square drill socket.
What to read after The Practical Metal Workers Assistant With the Application of the Art of E?
You can find similar books in the "Read Also" column, or choose other free books by Byrne, Oliver to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Un- wound in the act of drilling a hole when the brace is moved round in the usual direction, which agrees with the path of a left hand screw. The cutting motion produces no change in the length of the instrument, and the screw being held at rest for a moment during the revolution, sets in the cut ; but towards the last, the feed is discontinued, as the elasticity of the brace and work suffice for the reduced pressure required when the drill is nearly through, and sometimes the screw is unwound... still more to reduce it.
The lever-drill, Fig. 398, differs from the latter figure in many respects ; it is much stronger, and applicable to larger holes ; the drill socket is sufficiently long to be cut into the left hand screw, and the piece serving as the screwed nut, is a loop terminating in the centre point. The increased length of the lever gives much greater purchase than in the crank-formed braxje, and in addition the lever-brace may be applied close against a surface where the crank-brace cannot be turned round ; in this case the lever is only moved a half circle at a time, and is then slid through for a new purchase, or sometimes a spanner or wrench is applied directly upon the square drill socket.
What to read after The Practical Metal Workers Assistant With the Application of the Art of E?
You can find similar books in the "Read Also" column, or choose other free books by Byrne, Oliver to read onlineMoreLess
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