On the inner end of the mandrel put a block (F) of hard wood.
The discs are made by pouring lead round the screw-nose of the mandrel.
With a kick wheel having a removable head the mandrel can be screwed on and the block turned39 down in an upright position.
The point of the mandrel was driven through a piece of block tin, about 1/2 in.
It would seem, however, that a revolving tool was supported by a kind of mandrel, and actuated in primitive fashion by a bow.
The second way is to weld a collar and shape this on a mandrel.
The saw arbor or mandrel is carried by the main frame, and is therefore rigidly held.
The jacket was made by coiling a bar over the mandrel in a spiral, then hammering the coils into a welded cylinder.
This method is very handy with small lenses; the mandrel is turned, and the lens adjusted by hand till the images are immovable.
This mandrel is held in position by means of the posts of the frame which carry the split journal bearings.
"miner's pick," 1510s, of unknown origin; perhaps borrowed from French mandrin, itself of unknown origin. Also applied from 17c. to parts of a lathe or a circular saw.
mandrel man·drel or man·dril (mān'drəl)
A shaft on which a working tool is mounted, as in a dental drill.