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My lathe happens to be a Real Bull, not a Sieg, and I am not sure whether this kit would work on a Sieg.? (The right end of the lead screw has a different termination in the Sieg than the Real Bull, though it can be modified to match.)? But at any rate, I got the lead screw cover kit from:

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Amadeal Limited

Unit 20, The Sidings

Hainault Road

Leytonstone

London, England

E11 1HD

Email: info@...

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Their shipping document lists it as “CJ18 Leadscrew Cover Kit”.

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At the time I bought it (early 2018), it was around US$ 68.00 plus about US$ 24.00 shipping and handling; I don't know what the price is now.? Yes, it is somewhat expensive, but part of the reason is that it includes a new apron.? (The old Real Bull apron has a number of curved surfaces on the headstock side.? This newer one has flat surfaces, already drilled and tapped for mounting the cover.)

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Basically, the installation is fairly simple.? You replace the existing pillow blocks for the lead screw with the supplied pillow blocks, which have flanges for the spring loaded covers.? The left pillow block has a pipe-like tube that runs under the electronics, preventing any contact between electronics and lead screw, which was a feature I appreciated.? Two larger diameter flanges mount on the new apron; the old apron is removed, the gears, handle, bearings, etc. transferred to the new apron, and reassembled.? During final assembly of the lathe, the covers themselves, which are held in a closed position by a retaining clip, are slipped over the lead screw.? Once everything is aligned, (I had to jockey the flanges slightly to make sure they did not contact the lead screw), you can remove the clips for the covers while holding them closed, and then allow them to expand slowly.? (I wore gloves for this, but it proved not to be necessary.)? The expansion of the covers holds them in place, and causes them to collapse as the carriage moves from one end of the lathe to the other.

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I have attached some photos that I hope are of some assistance in making the process clearer.

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I don’t think you can see it in the photos, but at John's suggestion, (as he had already done a similar mod), I added thrust bearings to both sides of the right-hand pillow block to reduce the friction for the ELS operation, but this isn’t necessary just for installation of the covers.? I had to machine the right hand pillow block to make space for the thrust bearings.

I hope this helps, Ralph...