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+--- Thread: Storebro 15 x 36 Lathe (I think) (/thread-1877.html)
RE: Storebro 15 x 36 Lathe (I think) - f350ca - 12-10-2013
The least he could have done was made up a duct tape knob for it to finish it off.
RE: Storebro 15 x 36 Lathe (I think) - stevec - 12-10-2013
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.
RE: Storebro 15 x 36 Lathe (I think) - Hawkeye - 12-10-2013
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.
RE: Storebro 15 x 36 Lathe (I think) - Hawkeye - 12-25-2013
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.
[attachment=7489]
The finished taper.
[attachment=7490]
Before.
[attachment=7491]
After.
[attachment=7492]
RE: Storebro 15 x 36 Lathe (I think) - Hawkeye - 12-27-2013
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.
RE: Storebro 15 x 36 Lathe (I think) - Hawkeye - 12-27-2013
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.
[attachment=7514]
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.
[attachment=7515]
It can cut 32 standard threads, from 3 to 44 tpi, some with half-values, like 9 1/2 tpi.
RE: Storebro 15 x 36 Lathe (I think) - Shawn - 12-28-2013
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
RE: Storebro 15 x 36 Lathe (I think) - Hawkeye - 12-28-2013
Aw, shucks.
RE: Storebro 15 x 36 Lathe (I think) - dallen - 12-28-2013
the right gear combinations you can cut a lot more threads then whats on the chart.
RE: Storebro 15 x 36 Lathe (I think) - Hawkeye - 12-29-2013
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.