Imagine having four jaws!

…so let the one who thinks he is standing beware that he does not fall…

You could talk whilst eating. You could drink whilst eating. You could breathe whilst eating. That’s assuming you had two mouths; two pairs of jaws in each mouth. Of course, the four jaws might be in one big mouth, like the Alien alien. We just don’t know. More research needs doing.

Or they could be like these…

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These turned out to be quite easy to dismantle. I began with the big one at the back. Each jaw was removed by winding it outwards until it dropped out…

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The large key is engaged in the screw jack. Note the number “1” stamped on the jaw and on the body next to its slot. Facilitates returning the jaw from whence it came.

How to get the screw jack out? It seemed to be held in place by pins either side of the central smooth area…

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…and underneath, there doesn’t appear to be any form of fastening, so a friction fit?

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Great! This means I can try brute force as a first option.

I clamped the body to the bench with the part overhanging…

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The screwdriver is engaged onto one side and thumped…

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What if this damaged the screwdriver? Who cares. It’s a screwdriver. I’ll buy another one. What if it damages the part? Learning experience. Anyway, neither of those things happened. Alternating from one side to the other easily pushed the part out and I caught it underneath…

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Then the screwjack could be withdrawn…

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All the parts, dirty…

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…and clean…

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Assembly was a bit tricky in that these U shaped things needed lining up in the holes. First, I started them…

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…then used pliers underneath to turn them so they were aligned, but not fully home…

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This picture shows the tips of the pliers gripping the U shaped lug…

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Once the screw jack was in place, the lugs were banged fully home.

The jaws were set in their respective slots and wound in place…

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No annular ring in these; each jaw adjusts independently. The chuck in place on the lathe…

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All the other chucks were treated to the same process…

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The two discs are faceplates. These started with some rust, like this…

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After some rust remover treatment, they looked like this…

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Easy!

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