Cutting a V groove

[Howard LewisParticipant @howardlewis46836]

I have a C3, and checked and adjusted the tailstock alignment, using the two grubscrews on each side of the base.

I used the same technique, having modified a lever lock Tailstock, not originally for the C3, to align it after machining the faces on the base (as opposed to the factory finish angle grinding!)

If the upper part of the tailstock is aligned and secured in position by locking the two grubscrews against each other, to prevent any further movement.

If the screws are firmly locked, the alignment is unlikely to shift, unless the prismatic bed areas wear.

I am bone idle, and throughout my engineering career was always encouraged to do things the simplest way, but as Michael Gilligan says, you have set your heart on another more complicated method, so it will be an interesting project for you.

Keep us informed as to your progress, please.

Howard

[Martin Shaw 1Participant @martinshaw1]

There seem to be any number of variants within Siegs family of machines, my tailstock has only one grubscrew although I suspect it must generally be the same as all the others. A number of folk have commented that my approach is complicated and I would be the first to agree that altering an existing component must be easier than starting from scratch, however I would counter that with I can design out the securing from underneath, and remove the taper adjustment which I have no need for. I may be making life harder than it needs but if the end works well then I think its worth it. I’ll post more when there’s something to show.

Martin

[old martParticipant @oldmart]

It would be interesting to see some pictures of the interface between the halves of your tailstock so they could be compared with the common type. The Chinese tailstock which I fitted to the Atlas lathe is very similar to the 75 year old Smart & Brown one and yours is quite different.

[Author]

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