United States Rifles And Machine Guns a Detailed Account of the Methods Used I
United States Rifles And Machine Guns a Detailed Account of the Methods Used I
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In our eReader you can find the full English version of the book. Read United States Rifles And Machine Guns a Detailed Account of the Methods Used I 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 United States Rifles And Machine Guns a Detailed Account of the Methods Used I
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728. Tool- Holding Devices — Taper shank. Cutting Tools — Two counter- bores with pilot, Fig. 729. Number of Cuts— Two. Cut Data- Roughing speed, 260 r. P. M. ; ha -d feed; finishing cut at 85 r. P. M. Coolant — Cutting oil, i^-in. Stream. Average Life of Tool Between Grlndings — 1, 000 pieces. Gages — Fig. 730; A, total length from bottom of counterbore to back end; B, diameter of counterbore and oncentrieity with hole, also acts as a straight-edge across end. Production — 80 per hr. Note — Lo...wer end of bolt is centered by fixed plug.
This is why the thread in this case is so much deeper than the thread by which the receiver and barrel are fast- ened together. It is also a fairly long thread, so as to dis- tribute the wear as much as possible. The amount of work done, however, is so slight that the wear is almost negligible, the only pressure on the thread being due to compressing the main spring.
In a similar way the extractor collar which encircles the bolt, in the special shallow groove provided for it.
What to read after United States Rifles And Machine Guns a Detailed Account of the Methods Used I?
You can find similar books in the "Read Also" column, or choose other free books by Colvin Fred Herbert to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
728. Tool- Holding Devices — Taper shank. Cutting Tools — Two counter- bores with pilot, Fig. 729. Number of Cuts— Two. Cut Data- Roughing speed, 260 r. P. M. ; ha -d feed; finishing cut at 85 r. P. M. Coolant — Cutting oil, i^-in. Stream. Average Life of Tool Between Grlndings — 1, 000 pieces. Gages — Fig. 730; A, total length from bottom of counterbore to back end; B, diameter of counterbore and oncentrieity with hole, also acts as a straight-edge across end. Production — 80 per hr. Note — Lo...wer end of bolt is centered by fixed plug.
This is why the thread in this case is so much deeper than the thread by which the receiver and barrel are fast- ened together. It is also a fairly long thread, so as to dis- tribute the wear as much as possible. The amount of work done, however, is so slight that the wear is almost negligible, the only pressure on the thread being due to compressing the main spring.
In a similar way the extractor collar which encircles the bolt, in the special shallow groove provided for it.
What to read after United States Rifles And Machine Guns a Detailed Account of the Methods Used I?
You can find similar books in the "Read Also" column, or choose other free books by Colvin Fred Herbert to read onlineMoreLess
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