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Hey all

Bit by bit I'm learning more about my lathe (as a total newbie)?

I'm moving to the point where I'm trying to align my tailstock and have but a couple of stumbling blocks?

- I dont have any form of alignment bar (length shd be approx 150mm to fit in the unimat pc)?
- I don't have any Dead centers

Questions?
1. Are the dead centers for unimat pc the same as unimat 3? Ie. Non tapered and must slide them into spindle? If so I'll find unimat 3 dead centers online.?

2. Is the mounting of dead center as simple as sliding them into the spindle? If so Won't it be loose / have play?

3. Any online options for an alignment bar that stretches the full working distance of the unimat pc? By measurement it's abt 150-180mm

4. Unimat pc has an eccentric off center spindle on tailstock that allows adjustment supposedly in one axis (to front / rear of) Wouldnt this? adjustment would move the center point in both horizontal and vertical directions?


Any advice is much appreciated :)?

JP

For reference this is a picture of the unimat pc tailstock spindle. It has m14 threads for screwing on chuck / collet / live center.?

On Sat, Apr 8, 2023 at 03:14 AM, jpow wrote:

4. Unimat pc has an eccentric off center spindle on tailstock that allows adjustment supposedly in one axis (to front / rear of) Wouldnt this? adjustment would move the center point in both horizontal and vertical directions??

Yes, it does, but if you calculate the vertical movement compared to horizontal it is negligible. And if you work out the effect it would have on turning a cylinder, it would make it into a very shallow hyperboloid. Not considered too important for the jobs the machine was intended for. However, I don=t lie the tailstock and will be designing a new one once that project rises up the priority list. I picture a very traditional unit with a horizontal adjustment, largely machined from bocks of aluminium alloy. Details here when - if - it happens.

"I don=t lie the tailstock"

That's?

I don't like the tailstock

Must type even slower!