Turning a riser for VMC Z Axis

I need to make the above riser for my Mill - I have the mat'l: 6" diameter EN3 bar, but I don't have a working lathe (Super 7 might be a bit small anyway for an inexperienced turner).

I have a drawing but want to confirm register sizes and pcd of the 3 stud holes when I dismantle

Is there anyone in the East Midlands can help me with this (or know anyone who can)?

Thanks

Dave

You can see how one person has done it on this forum thread

Take note of the warning about the Z-axis screw becoming detatched from the nut. I seem to remember xxxx on YouTube - doing a bit about his riser in one of his early videos. He also covered making the increased length screw as well.

Found it . It starts Link Deleted Be warned - his language can get a bit "fruity" at times when things don't go his way!

John

Edited By JasonB on 08/08/2020 07:32:15

Hi John,

My language is a lot worse than DB's - seen his video, but it doesn't explain fully how to manufacture the riser without a lathe

Dave

Have you got a rotary table for your mill?

It might be possible to use one to make this part.

Martin.

I made my riser block for my 626 mill using my lathe, an SPG equivalent of the Warco WM290.

Gripped my 6" block using the external jaws on my 3 jaw chuck, drill a centre hole and supported the mass using a live centre. Ends faced and spigot/recess turned using a moderate speed..

A relatively straight forward job...

Dave - I'm in the East Midlands (Derbyshire, about 4 miles south of Matlock). If that's within striking distance, I'd be happy to help.

Robin.

Hi Robin,

Many thanks for your kind offer of assistance - I've not looked at the forum for a few days due to the amount of members helpfully telling me 'it's an easy job with a lathe' when I specifically stated that I hadn't got access to one!

I will PM you

Dave

Well there's gratitude for you.......I see you are inundated with offers of help.....not!

John,

I am extremely grateful for the well meaning input regarding the manufacture of my riser - However informing someone WITHOUT a lathe that the job is easily done on a lathe, hardly seems helpful. My Mother could easily do this on a lathe, if she had access to one!

I have had several offers of help and the job will be sorted shortly - Thanks

I must remember to tell the next homeless person I see to buy food from a shop using the money they don't have

Dave

This line rather creates the impression you have a lathe and is most likely the cause of the confusion. I know I'm confused. (But that's about all I know.)

But feel free and go ahead and talk that way to the next homeless person you see. It might do you some good.

Edited By Hopper on 04/08/2020 07:25:40

It would seem comprehension levels are still down today.

Which appears to be contradicted by the following sentence about having a Super 7 but fearing it is too small.

Hence the confusion that triggered the abuse at those attempting to help.

About as easy to comprehend as alien DNA.

Edited By Hopper on 04/08/2020 10:41:19

There is no confusion. You've just got to understand that " but I don't have a working lathe " means that his lathe doesn't work at the moment and that's why he is asking for help.

Is your face mask steaming up your glasses or something?

No confusion here Dave T has a Myford super 7 lathe but for some reason it's not working. In trying to be helpful can I ask why your lathe isn't working and is there any way anyone can help with that?

Tom.

Hi Thomas,

There are myriad reasons why it's not operational - I'm trying to avoid working on multiple machine projects.

It's an early S7 (1953) which I've got to replace the oil sight glass in the headstock (I've been playing with 3D printed parts), I can't turn one as there would be no headstock oil!

Leadscrew needs replacing cos it's very worn in the first few inches, but I do have a new one, but have to shorten because I have a gearbox.

I've had to replace the single phase motor and have installed a 3 phase motor with inverter but have yet to wire in the panel.

Replaced the headstock belt with a link belt, which won't clear or tighten so I've got to take the spindle out to put a proper one in - the list goes on but strip, clean and lube is a lot of it. Paintwork is in need of attention at the same time too!

Luckily I took early retirement mid July, but the jobs keep piling up

Dave

Hi Dave, you sure have a lot to do to get that lathe working again. Would offer to help but I am way down in North Devon. Hope you get it sorted.

Tom.

Thanks Thomas

The oil sight glass for the headstock makes rocking horse teeth appear commonplace - and I lost the bezel off the original one too.

Oh well, the new MIG welder arrived today with a broken hinge too (but a new set are in the post)

Onward and upward!

ps. Sorry if I upset anyone on the forum!

Do any of you know the maximum riser height you can fit on a VMC before needing to get a longer leadscrew?

Hi Vic

I have fitted a 4" riser to my VMC, and on raising the table the leadscrew will disengage before touching the retracted spindle nose. If you have managed to disengage the leadscrew on one occasion then you won't want to do it again, as it's a real pain to re-engage.

In reality, I don't have any real problems with disengagement as there is normally a chuck or some other tooling in the spindle. The 4" riser solves far more problems than it creates, and transforms the use of the machine.

Long time since I’ve seen my VMC in bits but would it be possible to fit some kind of stop on the leadscrew to prevent it disengaging unintentionally?