Monsterising Assembly part b

If one doesn’t lubricate things properly, this happens to your Countershaft…

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That’s not so much scratchings as burnishings; the result of something turning for long periods in an oil starved bore. Here’s where the bores are…

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Bet you thought I was going to post a picture of The Houses of Parliament. Within these two bores – the one on the left is called Cameron and the other is called Milliband – is bushes made of more of that bronzy stuff we never got to the bottom of. The diagram calls them “Oilite Bushes”

I smoothed out the Countershaft. First I replaced all the annular scratches with longitudinal scratches with some 400g paper and oil…

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How do you know which grade of paper to start with? Start with a grade which is obviously too fine. Observe the rate of scratch creation. Move down the grades until you achieve a good scratch creation rate. Then work back up the grades – not every one; you can jump two or three – turning 90 degrees each time, until you get a fine polish. With something like this where there’s some deep scores, ignore the deep scores. If you try to smooth them away, you can change the diameter. A general polish is the aim. I put the Countershaft in the mechanics vise – with leather protection against the vise teeth – and carried on up the grades like this…

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By the way, see the sample bottle on the shelf? Has VG32 oil in it. I use the yellow top syringe next to it to transfer oil from it to the little oiler can to the right of it. Liberated them from the Doctors’ Offices. In case you were wondering.

One end of the Countershaft has this chewed up slot…

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After some filing…

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The polished Countershaft…

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With shafts of a narrower diameter – less than 13mm – you can use an electric drill to speed things up. Here’s the set up to polish the Motor Base Swing Pin and the Swing Head Pin…

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With a drop of oil between the wooden support and the Pin and the drill on a slowish speed, hold on some paper…

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…and work evenly. Move up the grades. This produces quick results, so don’t overdo it. Here’s the result…

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Here’s all the Pins and Shafts cleaned up…

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Before putting it all back together, I also cleaned out and polished inside all bores with 2500 and oil, just to make sure there was no flash rust or roughness.

The two oil nipples on the Swing Head were prised out and replaced with new ones…

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Final assembly next…

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