Fig. 1825.
[Fig. 1825] shows the machine arranged with back gear for bolts from 2 to 21⁄2 inches in diameter, the essential principles of construction being the same as in [Fig. 1820].
Fig. 1826.
Fig. 1827.
In [Fig. 1826] is represented a single and in [Fig. 1827] a double “rapid” machine, constructed for sizes up to 5⁄8 inch in diameter, the double machine having a pump to supply oil to the dies. This pump is operated by an eccentric upon the end of the shaft of the cone pulley.