This is the powerhead frame and the completed eccentric. After much trial and error the holes were pre-drilled for the bearings.
This is the underside of the eccentric and the pulley. We were concerned about the aluminium pulley hubs wearing on the steel shafting so Alby modified the turntable and eccentric pulleys by boring out the hubs and fitting a bushing made of oil impregnated high density vinyl. Both shafts were also drilled from the end and an oil hole drilled from the side to enable the occasional drop of oil to be applied to the bushes. One other change that Alby made was to drill the 8" pulley spokes to enable it to be screwed directly to the eccentric. You can just make out the 3 screws in the spokes
This photo shows the low speed shaft output pulley after Alby trimmed some metal off the hub and re-positioned the grub screw.
Fresh after painting. The overarm is waiting for the rest of the bits and pieces to dry as well.
This is the base box after painting and drilling. As can be seen, the two shafts are closer to the edges of the box than planned. I misread the distance and didn't realise until after assembling them. Whoops.......... They should be on the centreline of the shaft supports and 1" in from the edge.
Another view of the box.
This closeup of the turntable shaft shows the small oil holes that Alby has drilled in the ends of the 2 fixed shafts. A small drop of oil occasionally should suffice.
The powerhead is now ready for assembly.
This is the low speed shaft mount. As can be seen, some mods were done to it. Countersunk coachbolts serve to hold the bearings in place.
This is the other side of the low speed shaft mount. Ignore the crappy paint job please. Painting has never been a strong point of mine.
This photo shows the 2 powerhead shafts, the bearings and the pressed steel bearing housings for them. The bearings were bought at Consolidated Bearing Supplies in Whyalla, South Australia.
This shows the motor and the low speed shaft mount in place.
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