MY CORLISS
ENGINE BUILD
Part 11 by Vince Cutajar
MY CORLISS
ENGINE BUILD
Part 11 by Vince Cutajar
Fitting the valve spindle to the valve disk took me nearly an hour playing around so that it was a nice fit. With the spindle still in the chuck I put the hub on the the valve disk to see how they fit together.
I left a little clearance between the valve disk and the hub on purpose so that they do not rub together.
To cut the spindle from the parent material, I put it in the hub, packed it up with washers and bolted it.
It was hacked sawed off and the hub with the spindle chucked up in the lathe. Faced it off.
Left a little clearance so that the spindle can move slightly axially. Also did the part for the top of the valve disk in bronze.
Next the inlet and exhaust covers.
After a bit of hacksawing and milling, the covers were brought to size. They are slightly wider (24.5mm) than the plans to accommodate the heads of 3mm bolts. I left them also slightly longer so that after they are finished they could be filed, or milled, so that they will be flush with the cylinder.
Next their thickness was milled down to 6.35mm.
The 3mm clearance holes, the central 6mm hole and the two 3mm tapped holes were done.
Next more work on the inlet and exhaust covers. Decided to use the rotary table to create the boss on the covers. I used the following home built accessory.
It was inserted in the centre hole of the rotary table and bolted from the bottom of the RT. It has a 6mm shank which is the same as the inlet and exhaust hole of the covers.
The rotary table was centred using the coaxial centring tool.
Used a piece of scrap aluminium flat bar at the bottom, then the cover and the rest some packing, before bolting it tight to the table. Here it is finished.
And after a little cleanup.
To finish off the covers, all I had to do was mark off the excess, mill it and draw file it so that I would be flush with the cylinder sides. I also made a couple of gaskets.
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