Hoofddorp Barn, BSA folding Bicycle

[Alex van de Wetering]

The first two pictures of this batch show the chainwheel after cleaning up the welds.

Next up was changing the cranks into the BSA type with the bushing at the end. The cranks were sanded down to the correct "rounded" shape in a previous step already, the stock ends were cut off and the newly turned bushings were welded to the ends. The process was basically the same as with the chainwheel; first two welds to tack it in place, than aligning the pieces properly, so the holes at both ends of the crank move parallel....and welding it fully afterwards.

I am not a very good welder and a very basic MIG weld set doesn't help either, so I usually have to weld a bit, clean it up....weld a bit more, clean up a bit more....and so on, and so on.
I cleaned the welds up with an angle grinder, then a powerfile and than the Dremel multitool for the last bit.
After both cranks were finished, I noticed that I had welded the bushing on one of the cranks the wrong way round
So, it was time to turn off the light and close the door of the barn for that day!

The next session, the bushing was cut from the crank again and welded in the correct orientation. I drilled holes in the end of the crank, cut some thread and testfitted the little thingys with a spring and small ball. After testing the setup with the rods, about to be converted to pedals, the thingys were removed for painting.