Storebro 15 x 36 Lathe (I think)

[f350ca]

The least he could have done was made up a duct tape knob for it to finish it off.

[stevec]

Hawk, I was a bit curious about the circular "spacer" between the cross slide and the compound. could it be modified or changed in order to lower your compound enough to accommodate a proper sized (for the lathe) QCTP?
Of course that strange, yet seemingly very robust, expanding toolpost anchor would have to be eliminated.
Maybe you could make a new compound to accommodate a QCTP?
Or maybe I could just shut up.

[Hawkeye]

Steve, that 'spacer' is actually part of the top half of the crossfeed casting. They really didn't use any extra parts. It seems to be one very solid machine.

As a collector of classic motorcycles, I have a strong aversion to modifying original equipment. If I wanted to make a QCTP, I think I would make a new top slide for the compound. It comes off quite easily, so changing back and forth would be a snap.

The carriage screws both have 3mm pitch. Lead screw, on the other hand, is 4 tpi.

[Hawkeye]

A couple of weeks ago, I made a replacement handle for the back gears, with the intention of prettying it up when I got the chance. I used the ball turner on the Hercus lathe to turn the ball on the end, then transferred to the big lathe to turn the taper. I set the compound to 2* and used the new tangential toolholder to cut most of the taper.
   

The finished taper.
   

Before.
   

After.
   

[Hawkeye]

I sent Tony Griffiths an email last night with a write-up and a few pictures. This morning, he already had it added to his site.

http://www.lathes.co.uk/ornmaskiner/page2.html

I burned over 40 photos to a disk this morning to mail to him. I may not get any additional information about this lathe, but at least I can add to what's available.

In the info he has on the 185-GK, it shows a massive QCTP, which would appear to fit on the same style of compound. I may have to make one of those.

[Hawkeye]

Breakthrough! I was researching using various change gears to convert to metric, hoping I could reverse the process with gears I have to cut standard threads. I went down to look at the QCGB charts again and it occurred to me that the lower chart actually referred to standard threads.
   

The headings that mention the 40- and 45-tooth gears have the same wording as the ones in the top chart (that covers metric threads) for the first and last gears. After I changed the 80-tooth to 40 and the 127 to 45, every test I ran produced the thread shown on the chart.
   

It can cut 32 standard threads, from 3 to 44 tpi, some with half-values, like 9 1/2 tpi.

[Shawn]

That's great you got the thread cutting capabilities sorted out and very cool your lathe is now on Tonys site. I didn't realize is was that rare, to not even be listed in the ultimate online lathe compilation! Makes you a bit of a celebrity in these parts

Shawn

[Hawkeye]

Aw, shucks.

[dallen]

the right gear combinations you can cut a lot more threads then whats on the chart.

[Hawkeye]

David, I'm aware of that, and I do have all of the gears listed, so I should be good to go. For right now, though, I'm just glad to have the standard threads worked out.