3 Attachment(s)
Plans for Missing Parts - Cunning Plan #B
While researching the parts pages in the catalogue, I realised that my No.1½ shares a number of parts with the No.1 post drill (and other varients) *.
The No.1 shares the same flywheel and (I believe) the same crank-arm, while the crank hub (non-detachable on the No.1) could probably be easily modified to suit the No.1½. While my No.1½ is the only such machine I've ever seen listed, the No.1 shows up from time to time...
Attachment 335904 Attachment 335903 Attachment 335905 sellers pictures collected over a few years.
And better still - having the flywheel rotate at the same speed as the hand crank makes it a less popular machine to own - hopefully I might be able to pick up an incomplete one for not too much cash.
Of course, that'll still leave me short a table :doh: but that's just one pattern to make.
Cheers, Vann.
* other common parts (not needed for this rebuild) include: feed-wheel; feed nut & screw; coupler; and spindle.
7 Attachment(s)
Fitting the Coupler and Spindle
Over the last few days I've cleaned up the spindle; chuck screw; spindle cog key; coupler nut; fibre thrust washer; half-washers; and guide bolt & nut.
Attachment 345680 Attachment 345681 Boynton & Plummer No.1½ coupler components.
The coupler nut thread is 1 3/32" dia. (27.65mm) 16tpi. The thread form does not match my Whitworth thread gauge. The guide bolt (anti-rotation bolt) is 3/8" diameter 16tpi (3/8" BSW/UNC). The chuck set screw is 7/16" dia. 14tpi (7/16" BSW/UNC).
Interestlingly the half-washers fit into a groove in the feed-screw and the coupler is fixed to the spindle. This coupler arrangement is the reverse of the coupler on my Dawn No.611 - on the Dawn the half-washers fit into a groove in the spindle, and the coupler is fixed to the feed-screw.
Attachment 345682 Dawn No.611 coupler components.
On the No.1½ chuck is stamped "3"...
Attachment 345678 Attachment 345679
...which matches a similar "3" stamped into the main crank cog...
Attachment 345676 Attachment 345677
...and another "3" stamped on the main casting (photo too fuzzy to post). I didn't find any other stamped markings on other parts, but I guess this means that these three items belong together.
Today I greased and reassembled the coupler and spindle (another fuzzy photo).
So that's all the original parts I have, de-geased, de-rusted, de-burred, re-painted, re-assembled and lubricated. I now need to select and fit a temporary flywheel. Then it's patterns to make to have the missing parts cast - but that'll go on the back-burner while I finish off the Dawn post drill, and reassemble a bit more of a Silver post drill that's also in the process of being refurbished.
Cheers, Vann.