Headstock Part 2

Flying would be great fun if it wasn’t for the passengers…

Here’s a picture of the partially dismantled Headstock showing a large cog type of thing in the middle of it. It’s called a 21/56T Backgear Cluster…

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Easily removed by undoing this screw…

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…revealing this Backgear Eccentric Assembly…

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The lever on the right moves through two positions, rotating the Backgear Eccentric Assembly, and engaging and disengaging the 21/56T Backgear Cluster from the gears above. Here it is in context, circled…

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The lever on the right is removed by releasing two grub screws…

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Then the Backgear Eccentric Assembly was drifted out quite easily.

This is a close up of one of the Spindle Bearings. It’s made of quite soft metal and so is easily marked. I used some wood to knock it off the Headstock body. The crossed channels are oil galleries, fed by the glass Sight Feed Lubricators…

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Here’s the basic Headstock body, ready for cleaning…

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The Sight Feed Lubricators are screwed onto the Bearing Caps which go over the upper Spindle Bearings…

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The Bearing Caps hold the upper Spindle Bearings, which are identical to the lower ones. The Sight Feed Lubricators are easily removed and the pin taken out for cleaning…

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This picture shows a view through the hole in the Bearing Cap, leading to a hole in the upper bearing, which leads into the oil galleries. This constant drip keeps the bearings constantly lubricated…

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I’m not that happy with these Glass Sight Feed Lubricators. The oil which came out was quite dirty and the inside of the glass and the little gauze filter look gungy. There seems to be no easy way to clean them out. I’ll have to think it through. These are available to buy, so if I ruin them, it’s not the end if the world.

Next, dismantling the main Spindle…

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