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Tube-fas′ten-er.


Steam.) A machine for fastening tubes in tube-sheets, by expanding them against the edge of the hole to make a steam-tight joint.

McConnel's tool for fastening boiler-tubes.

The cylindrical mandrel or shank has a number of longitudinal grooves in its periphery, increasing in depth from its outer to its inner end, the bottom of the grooves forming a tapering or wedge-shaped foundation for a corresponding number of bits or sliding dies, part of which are for forming the bead on the tube inside of the tube-sheet, the other for flanging or turning out the end of the tube against the sheet.

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McConnel (1)
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