The cast iron cylinders have a metal sheet cladding. No real technical function on the model, just for the appearance.
The main cladding plates, after a test part was made to get the final dimensions.
The main plate was made of 0.75mm mild steel. It was rolled in bending rolls and the top radius was bended over a 16 mm steel rod on the sheet bender.
A quick test if the plate would fit on the cylinder, held in position with some small magnets
The front an back plate are hand cut and filed from 1,5 mm mild steel, and hold here in position for marking holes.
Two M3 holes were made in the cylinder casting, and with small pointed Allan screws the plates the marking for the holes in plates was done. A small tap with the hamer on the plate was sufficient to copy the location of the position on to plates.
A view of the cladded cylinder
The front and back cladding plates, with the holes of the glands made. This was a job of measuring it of the actual job.
Some brass angle profile was fixed with M2 screws
Only the screws on the front an back plates have to be unscrewed to remove the main cladding plate, so the oil check valve can be reached for maintenance if needed.
The rear of the cylinder.
A CNC milled brass cover of the valve spindle.
The two cylinders completed
While the cylinder was dismantled anyway, I've made some oil groves in the cross-head, so it will be well lubricated.
This was done with the boring head and a small cutter, made of HSS.