Bottom view of the Friction Roll mounting bracket.

The same mounting bracket from different view-point.  The arrow points to the place where locking screw will be place.  The screw will lock the shaft of the "Friction Roll" in the desired position.

Here is the shaft for main gear.  It is an integral part of the frame casting and machined to final shape.  Polished surface will ensure smooth turning of the gear.  The tread in the center of the shaft is provided for gear locking screw.

This is the handle mounting threaded rod.  This rod is cast as an integral part of the frame, the tenon for a handle ferrule is machined and the thread is cut.  As we will see on the next page, this is an important detail.

One of continuing vulnerability of the No. 2 drill was the way main handle was attached to the frame.  This vulnerability manifested itself in cracks of the handle at the point of attachment to the frame.  It is especially notorious on the drills introduced sometime after 1906 when thicker handles were implemented, following changes in the frame design.  The new handle was much thicker at the point of attachment to the frame and carried wider, stepped ferrule.

Here are some pictures showing the problem on drill from c. 1938.

There are a variety of reasons for this persistent vulnerability and they are analyzed in depth by George Langford in his No. 2 drill type study.  Spend some time on his web site at GeorgesBasement.com - well worth it!  In addition to his finding, I believe there is one more reason for this problem.