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View Full Version : Small/Portable large bore lathes?



sconisbee
02-13-2008, 02:48 PM
Anyone know of any "off the shelf" large bore (think around 30mm) largish swing 8"? short bed lathes? thing light duty back of a van/truck size kinda like a oversize minilathe, or is it more likley that ill have to build my own headstock using a bed of say a minilathe or slightly larger? Kinda a long term project i have ideqas for, just never come accross larger bore small lathes, i figure a brake disk/drum lathe would be too specialised.

Spin Doctor
02-13-2008, 04:33 PM
Anyone know of any "off the shelf" large bore (think around 30mm) largish swing 8"? short bed lathes? thing light duty back of a van/truck size kinda like a oversize minilathe, or is it more likley that ill have to build my own headstock using a bed of say a minilathe or slightly larger? Kinda a long term project i have ideqas for, just never come accross larger bore small lathes, i figure a brake disk/drum lathe would be too specialised.

I know what you mean. That is why I am designing a new spindle for my lathe. If you can live with out threading then maybe on of the Hardinge style Secdond Op lathes. They take 5C collets so they can pass 1-1/4(31.75mm) through the spindle. Taking off of the base stand it might work. It all depends on the type of work you plan on doing

pcarpenter
02-13-2008, 05:05 PM
I have seen the South Bend Heavy 10 used just that way. Its really a table top lathe although this one was on an original stand. I think there was also a thread here some time back of some old millitary vehicles set up just the same way.

The lathe is not going to do well if its loaded and unloaded anyway, so while weight is a concern, the ability to lift and carry it would not be if it was to remain truck mounted.

Paul

sconisbee
02-13-2008, 05:43 PM
im really just playing with a few ideas at the moment but long term it would be nice to have some smaller kit mobile Probably in a medium sized box trailer... Basicly i get alot of these "can you re-bore my rudder pintels" or "can you make a bushing for this please" in regards to boats and around here it would be a whole lot easier if i had the ability to machine mobile, basically if i take plans forward it will be the smaller stuff like acetal rollers, bronze/brass bushings small screws etc, the larger bore would be nice for being able to work on propshaft tapers in the field. essentially its the stuff thats hardly worth going to pick up or having the customer drop off but if they have a bunch of little jobs i can go out to their site be it boat or whatever and spend a little time there get it all done in one shot then come home, the idea dawned upon me when i was visiting 4 different customers at one boat yard the other day and they were all small jobs and a light bulb came on and here i am:D Long term ill be looking to pick up a horsebox second hand, something along the lines of

http://www.jswhorseboxes.co.uk/images/horsebox_gold.jpg

these seem perfect for the duty as they usually have lowish floors, a nice rear ramp and side access and of course can handle the weight still not full size machine territory but a niche thats not been filled down here yet. but to start with as moneys a touch short ill go for the box trailer route or similar. A video a while ago posted i think here? of the guy that had that mobile kit for line boring and welding earth mover pins and such helped me along with the idea, chances are i wont get the mobile side of things off the ground but its an interesting idea to play with.

edit: i think i remember that military mobile shop thread, ill go hunting to see if i can find it.

38_Cal
02-15-2008, 09:39 AM
I know a gunsmith who set up at large pistol matches (Bianchi Cup, etc.) with a portable shop in a trailer...small bench top lathe and mill (mill-drill?). It's been several years since I've seen his setup, don't quite remember exactly what machinery he had. I know there was a buffer and grinder, a solid workbench, and room for sales/merchandise with one side of the trailer opening up like a roach coach. He could handle most repairs on the spot, and some custom work if there was time.

David
Montezuma, IA

deltaenterprizes
02-15-2008, 05:42 PM
I remember reading about a guy that has a small lathe and mill in a school bus and would go to plants doing turn arounds and do on site machine work, sounds like a good idea!

Bill in Ky
02-15-2008, 05:47 PM
They are no longer made, and I don't know if they are found in the UK but a 10" Sheldon has a bore over 1 1/4". I have had mine for 18 years and it has served me well.

sconisbee
02-15-2008, 07:14 PM
I have a plan!....well sortof, for the time being i've outfitted the back of my 4x4/truck/suv/whatever you want to call it, with the 7x12 mini lathe (yea i know its hardly big bore but its a stopgap) that I acquired ages ago not had a use for it till now, its got upgraded power/motor so its running at 700watts instead of the original 400w, still limited on bore for now, That rig is semi-permanent so its removable if absolutely necessary,

As for milling/drilling and general tools i have a 700kg limit on a box trailer for my 4x4 I'll probably buy second hand and modify to suit, haven't worked out the best layout to avoid unequal loading yet tho but thats a little down the line.

The only mobile milling i will likely need would be restoring/creating key ways cleaning up welds etc, and i already have an old drill/mill which will handle that for now, any larger milling I'll take back to the main shop for the profitmill to handle.

So the only remaining thing is to decide on the layout of the trailer for best loading and safety. And im having great trouble finding pics of existing mobile shops, found a couple of old army ones but other than that not much has turned up yet.