All things Beaver Mill

[DC31kParticipant @dc31k]

I can describe how it works on a PAL (later model). The centre hole is threaded and is what ultimately retains the boss. The boss itself has an oilite bush in it. A top hat washer whose minor diameter is the same as the projecting quill shaft is used. A spring is used between the boss and the brim of the top hat.

The boss has one projecting pin on it which provides the drive. This, in combination with the spring, allows the handle to be repositioned in 90 degree increments.

In principle, it operates in the same way as the knee crank handle but with fewer (only four) positions.

See:

http://www.vintagemachinery.org/mfgindex/imagedetail.aspx?id=17685

On my own, I made a new boss and now use a Moore jig borer-style steering wheel (originally from a boat).

[Andrew SkinnerParticipant @andrewskinner94774]

Thanks very much. I assume the quill handle is canted out at some slight angle, say 5deg, to clear the quill feed engagement lever?

Another small problem is, the Y axis leadscrew is rumbling badly as I turn it. Is it easy enough to strip down, and to find new thrust bearings for it?

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