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At one time I had a very good link to all the DIN specifications for at least a dozen or more commonly used (past or present) lathe spindle mount types Dieter. For whatever reason, any of my search terms today refuses to find a link to that same PDF. But there's at least 3 different versions of...

Ok that makes sense now, thanks for the extra details Nick.

It's a bit unclear how the ER 40 nut on yours works Nick. Is there an adapter for the usual Myford spindle thread or a custom ER 40 nut using that thread?

I don't know how Nick got his, but there's a thread here about someone in the UK doing custom conversions to the small bore super 7 head stocks to the large bore and ER 40 spindle taper. https://www.model-engineer.co.uk/forums/topic/myford-super-7-with-big-bore-conversion/ I don't know if he...

Carbide or even HSS can be shortened much like cutting glass. It doesn't need to be cut right through. Put a nick or groove around it, hold one end in a bench vise, cover with a rag, and a light tap with a hammer will usually break it to the length you want. Very hard equals brittle, that...

It's not that diamond wheels can't grind HSS tools at high rpm, they can. At least for awhile. But how diamond reacts to high heat and carbon are where the problems come up. From everything I've read, it's that high heat at the actual grinding location on the wheel surface combined with the...

That seems to be an odd business decision Dave. I wish them luck, but given the availability of some fairly cheap yet still quite accurate off shore dro's today against what the original Trav-a-Dials cost, it might be tough. There are some situations where the available space or maybe...

Given the lack of responses there now a fairly rare lathe. And I don't think all that many were sold even when they were still available. I've only seen a single new one at a tool dealers well over 20 years ago. But I look at making any improvements or modifications from the perspective of what...

Having an actual conversion chart would be the quickest method for metric - imperial or the reverse. But it's easy enough if you've got a tap drill chart. Just find the tap drill size in lets say metric, convert that to it's imperial decimal equivalent, and then find the closest recommended tap...

I'm unsure of what your asking about. What type / brand of mill and what taper does your mill already have?

While I haven't bought one of the tilting tables yet. If the radii of both the upper and lower halves are that poorly fitting, then your preset datum point on the work piece to either one or both milling table travels is without question going to shift around. Depending on what you might be...

If it were me and I was wondering about the fit between those male & female radii, I think marking one of either with even a sharpie as a fill in for engineers blue would work well enough to give you some indication for the fit between the two surfaces. I don't fully agree with Paul's video...

No real need to start a new thread. I'll have to check my bearing OD's and ID's and then double check what the dimensions Weiss uses on there MT 5 spindle are. I'd maybe wrongly assumed Weiss used a different head stock casting for the increased spindle size. That may not be true if they did in...

Mine is the basic 280 VF, but bought before they came out with the MT 5 large bore version. So it only has the MT 4 spindle taper and just over 1" / 25.4 mm through bore.

Thanks for the additional information Neils. I was wondering if you'd machined your own spindle from scratch. And then how you might have rough machined, heat treated and then precision ground that spindle and the internal Morse Taper. Using an off the shelf spindle from a larger lathe was in my...

Very interesting a much larger spindle of that size can be fitted Neils. You really should do a bit more in depth thread about how it was done here. I'm extremely impressed.

Here's the Grizzly Tools manual for it. https://cdn0.grizzly.com/manuals/g0729_m.pdf Page 27 should have what your looking for. But those speeds are at best only approximate. Given today's availability of rather cheap digital rpm displays, adding one might be more helpful. Even though I did...

Collets are supposed to be properly hardened and then tempered back to a spring condition. That's due to how there designed to open and close while staying out of the metals permanent deformation range. There's a few warnings online about not trying to fully close any ER collet without the...

What your doing is basically no different than making a back plate for any lathes threaded spindle. In general, most would recommend starting out by machining your own thread gauge that matches the wire measurement as closely as possible over both the dividing heads spindle threads and your...

While it would be difficult, very long lead pitches are completely doable on a lathe. Maybe not easily or possible with one that has a gear box, but with a plain change gear lathe it's certainly within what could be done. You'd have to add a whole lot more gearing than any lathe usually comes...