This is approximately a "9x20" size. Other people, such as Warco, do a similar lathe. Axminster originally listed a toolpost which they claimed was specifially for the BV20, but I spent over a month waiting for it to come in stock and it never did. I suspect that it was the same design as the one shown below anyway.
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These lathes probably get more criticism than they deserve. Like the 7x lathes, they have their shortcomings, but if the 7x lathes are too small for your needs, the 9x lathes might be a good choice for you. Some complaints about the speeds being too fast but I have not noticed this.
Seems to me a good range of useable speeds to me. One complaint would be the tool post clamp needs to be beefed up. This was the first mod I did. And yes it did take some adjusting but not as much as my 7x. I would have to give my 9x a thumbs up. Richard Shell has posted some interesting 9x20 mods on his site. While larger in capacity than the 7x10 or 7x12 and incuding change gear selection levers, they lack some desirable features including continuously variable speed and reversible leadscrew.
JW Early bought one of these a few years back and has some reservations about it. Here are some of his remarks: The main problem with these machines is the lack of tumbler reverse. That is no ability to cut left hand threads. This can be fixed with a little work. Two on this list have successfully done this modification. The other problem is a very undersize lead screw and zinc cast nut on the cross slide and compound slide feed. This causes a very notchy and rough feel when using these slides.
At the present I am making new feed screws for my machine. Another problem is the clamp that holds the compound to the cross slide uses only two screws and is of very flimsy construction. I made a stronger unit about 10 years ago for mine that uses four screws and that has worked fine. The basic structure of the machine is good and if you want to put some time into improving it you will have a good if not great machine to work with Here are some photos JW Early provided showing the difference between the compound for the 9x20 and 7x10 It is only half a quick change machine.
To change selections for the other 32 speeds you have to use change gears. Next it has no tumbler reverse on the leadscrew for left hand threads or cutting from the chuck out as you can do on the 7x Cross slide operation is even more awkward than the 7x10 and the mounting for the compound slide is not as sturdy although it is easier to change compound angles on.
It does not have a back gear low speed option for cutting coarse threads or cutting hard materials. The belt drive is on the end of the spindle instead of between the bearings, so when the bearings get hot after an hour or so of work the spindle tightens up and can fry the motor if you are not careful.
I know I fried two motors on mine before I started limiting my running times. Basically it is a large sized hobby lathe with all of the concept problems and designed in limitations hobby lathes have. The 7x10 is a miniature lathe designed with many features of full sized lathes. Just remember if you get one it can be made to work, I have several articles on fitting a tumbler reverse that I could pass along.
The factory clamp is so weak that the cutting tools are forever grabbing and digging in, breaking the tool or the belt. The sturdier mount allows the machine to actually work. The spindle bore on the 9x20 class machine is exactly the same as the 7x10 and the South Bend and Logan 9" lathes.
This can be opened up with a reamer to about. The 9x20 could be a good machine if the builders had been a little creative and not faithfully copied the Emco-Maier Compact 8 to such detail. The major problems with these machines are no tumbler reverse for left hand threads and a totally inadequate mount for the compound slide.
I was not able to use mine until I made a redesigned mount that uses 4 screws instead of 2 to clamp it down. These machines can be made to do good work, but they need a massive amount of detail improvement before you can do much of anything on them.
Read the messages here and check out some of the 7x10 web sites and see the improvements many here have done. The 9x20 machines need most if not all of these fixes to work and some more very involved work that is unique to them. I have had one for about 12 years now and rarely use it anymore as it is much easier to use the 7x10 for small parts and my South Bend if I need something bigger.
As far as I have been able to see the only difference between those from different companies is the color of the paint and the label plate. I have had one of these from the original importer before the rest got into it.
The machine has a good solid bed and is heavy. As far as productive work goes unless you need 8 more inches between centers the 7x10 can do more and better work easier than the 9x20 machines can. It is missing many features that are standard features on the 7x10 such as: Reversible lead screw feed by tumbler lever Slow speed back gear system for threading and heavy turning Reversible variable speed motor The ability to pick it up and move it to where you want to work.
The 7x10 is a small sized real lathe like the Myford, South Bend and Logan lathes just more compact. The 9x20 is a large size hobby lathe like the Compact 8 and the larger Prazi with all of the same performance limitations of the type. Also featured is the Enco RF30 mill. Here are some comments by Jack Fuselier, a gunsmith who owns a 9x I considered the 8. The 9x20 has the quckchange gear box, not so the other. The 9x20 lathe is not just bigger, it also comes with both chucks, a faceplate and both steady rest and follower rest as well as tools.
Backsplash and chip pan are included.. For a hundred bucks or so more, you get a full size bench lathe, capable of pretty large work. For the few times I work a rifle barrel, I can use a friends Atlas. One drawback is the lack of a tumbler gear to reverse the leadscrew, but only the minilsaathe has that anyway, the 8.
It was a relatively simple job, as gunsmithing goes. The other drawback is the weight, you will definitely going to need some kind of hoist or a couple of weight lifter buddies. OTOPH, perhaps the mionilathe is all you need. There is a big difference in an 80 pound machine and a pound machine.
"bench 20lathe" in South Africa
Economical Bench Lathe (Mini Metal Turning Lathe Machine BV20-1 BV20L-1)