Thread: Restoring a Servian Pedestal Drill press

Originally Posted by Stustoys

when I say one of the cars I mean "the car that can fit at the minute", the other car is outside all the time ATM due to lack of space......... or should that be "due to to much ebaying"? lol

Stuart

I know that feeling FAR too well...

Just a little progress report.
I've not dedocated any specific time to the project yet - none spare really - but every time I have a closer look at something I clean it or fix it. Eventually the whole thing should get done
The other day I got the moter running as mentioned, and last night I wanted to use it to drill some holes, so I found and fitted and wired up a "period" machine switch (a cream bakelite push button 3-phase "Standard 20A 500V" job. It looks right.
Then after just one hole, the RCD got triggered with a big spark coming from inside the motor and something was rubbing inside. I tried it a couple more times and found it triggered only in the 'run' condition (not whie starting) - bugger.
Today I pulled it apart, expecting bad news and - the return of dust to dust....
However, I spotted the fault in one of the connections to sht started swtich where the insulation had failed. Replaces that, cleaned the now separate part up properly, primed the whole thing and enamelled it late this afternoon. Mmmm - nice and shiney!
Now I'll have to do the drill head casting before I fit the motor.... Also managed to sand the rust off half the column. Bit more elbow grease required to make it shiny steel though....

Joe

PS: I also managed to get the quill return spring into the space in the casting - but alas the inside end clip snapped off as soon as I put some pressure on it. I tried to bend a new end, but it snapped off again just as quickly. I'll try next by annealing the end before bending it into shape.

A little more progress and a couple of photos.
No time yet to sand and paint the main head casting - and I haven't fitted the counterwight pulley and it's bracket yet (pulley is now made).
But I did receive in the mail from Germany a very nice keyless chuck and MT2 arbour - 0.3mm to 16mm! It looks like its running dead true - will have to put a clock on it one day and actually measure the run-out (it was advertised for "CNC"... ?).
I've been using the drill a few times now and I clearly need to find and fit an intermediate pulley to reduce the spindle speeds a bit. I'm guessing the 5-speed version I have was originally made for woodworking...
Anyone know where I can find a 6" or 7" A-section 5-step pulley? Otherwise I'll have to turn one up from a big (expensive) lump of aluminium...

Joe, starting to look nice! I have the same speed problem on the Tough - 500 minimum. A while back I tried to find cone pulleys for something else and had no luck. My local bearing place sells all kinds of pulleys but couldn't get those. They suggested I buy single pulleys and bolt them together. I trawled the net for a while but gave up. Later I stumbled on one at a market. I will either fit that as a countershaft pulley, or possibly adapt a 2 speed motor I have. That would get me into the 300s, which is probably slow enough.

Hi Joe,

Its looking much better already.

Make one out of wood and see if you can find ummm .... someone to cast it for you
In fact if you werent going to be to fussy about the finished size you might be able to use one of the pulleys you have as the pattern.

Stuart

fit a vfd to it.

Originally Posted by Stustoys

Hi Joe,

Its looking much better already.

Make one out of wood and see if you can find ummm .... someone to cast it for you
In fact if you werent going to be to fussy about the finished size you might be able to use one of the pulleys you have as the pattern.

Stuart

Thanks Stu. Good idea about using one of the pulleys as a pattern!I might just do that - plug up the spindle hole, fill in the dished part of the top of the motor pulley and coat the whole thing in a couple of milimeters of wax (to allow for the shrinkage of an aluminium casting). Then machine it to suit a couple bearings, as it will be an intermediate.

Com_VCfit a vfd to it.

Originally Posted by Com_VC

fit a vfd to it

That's an option, but there are already too many VFDs here... ... and it would not increase the torque, which is really what you need to drill bigger holes.

Joe

A little more progress.....
I took up Stu's idea of using the motor pulley as a pattern - and with the help and expertise of RayG and son Josh, we cast a replica (see also Ray's post on the subject).
Here are the photos of the machining. Since then I bored housings each end for single row bearings and turned a spindle to mount the new 5-row intermediate pulley. I expect to have the mounting arm and new V-belts fitted tomorrow (more photos to come) for a test run.

Joe

Looking good Joe. Little bit of chatter? Looking forward to seeing how you tackle the pulley mount. What kind of lathe is that?

Hey I like this, I come up with the ideas, you guys do all the work, I could get used to that lol
Looks good Joe, whats the story on that twist drill?
Did you get any info from that other drill?

Stuart

Originally Posted by Bryan

Looking good Joe. Little bit of chatter? Looking forward to seeing how you tackle the pulley mount. What kind of lathe is that?

Thanks Bryan.
A lot of chatter actually - the aluminium is very soft and the pulley is at the size limit of my lathe, which runs too fast for a large part of this pulley. And I am a cheap skate, grinding a single pointed tool to finish both sides of the V-grooves, see the second photo. As a result it has no rake and its action is more like scraping than cutting.
The lathe is originally a CVA turret lathe. You can read its saga here.

Joe

Originally Posted by Stustoys

Hey I like this, I come up with the ideas, you guys do all the work, I could get used to that lol
Looks good Joe, whats the story on that twist drill?
Did you get any info from that other drill?

Stuart

Thanks for the idea Stu.
I actually don't know what sort of drill this is. I have seen a few of them in my travels, and picked this one up because of its length. The first 20mm are a slightly smaller diameter than the main part - maybe 15.5mm ahead of the 16mm main section. I'm guessing that the two grooves in the flute flanks are to allow significantly more lubrication than standard drill designs. Maybe it is for same special metals - brass maybe? Its just HSS.
I contacted the other drill seller but he couldn't or wouldn't take more photos and I asked him to give my contact details to the new owner - and haven't heard back yet.
I've come up with my own design since. The Servian design uses a sliding overarm cast bracket which is fitted to the motor mount rods. That puts the motor too far back for my liking and intended space.
I''ll take more photos when I fit it tomorrow.
Joe

Ah, that lathe! I enjoyed reading the story again.

The drill might have been sharpened as a "sort of" reamer. Works pretty well I'm told but am yet to try it.
Look forward to the pictures.
Stuart