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Everything looks as you'd expect, apart from the extension. Given that there's a circlip in place (as normal), my conclusion is that it's either on the original J6 taper, or the end of the spindle has been modified for a screw fit. My next thought is to make up some wedges, though the 1mm gap...

Hmm, not something I'd considered. I can't tell if the end of the spindle forms a 'roof' at the top of the slot, or whether the taper is sitting in a blind recess. Wouldn't hurt to give it a go though. Thanks for the suggestion 👍

I'm coming to the same conclusion - the challenge is removing it without any damage. The bearings run quietly and I want to keep them that way 🧐

No worries Doug. This also shows a groove machined on the one side with the circlip sitting just above it...

Best I can get... Just a thought, but if you wanted to drive out the spindle through the bearings, wouldn't the extension need to be removeable? The extension looks to be pretty much the same diameter a the inner bearing race...

Very interesting Ian and indeed the Fobco fitted with the extension does indeed look like mine. On mine there's an approximate 1mm gap between the top of the extension and the bottom of the spindle, which makes me wonder if the extension is simply fitted directly onto the regular JT6 taper. If...

Thanks for all the replies. Marcros - what a cracking restoration, The photos are very helpful, particularly No. 8, which shows the Chuck taper below the bottom bearing. So my question is - what is the length from the bottom of the bearing to the end of the taper? If it's longer than the...

Hi, I acquired a Meddings Driltru Mk2 (1975) a while ago, sold as non-working. Turns out it was just the fuse in the plug, which I replaced and hasn't blown since. After speaking with the nice people at Meddings it turns out the drill was originally sold to the GPO (remember them!). The depth...