|Thread: What are these for|
Posted by not done it yet on 06/04/2020 11:23:32
My first thought, but the bolt cannot push and pull at the same time? Because BB has not said there are any movable parts at the bottom end have to assume they simply fit in a slot of some description. Parts for some form of jig?]..............................
Edited By not done it yet on 06/04/2020 11:25:42
Wouldn't it work if the "toolpost" was poking through a thick washer to set the centre height of the tip; so long as the washer is thick enough to raise the bottom of the tool above the oval bottom of the hole of course.
The pair on the right look like lantern toolholders.
Would they slide into a T slot in the topslide?
The square headed screw would lighten down on the toll and lock both tool and holder.
|Thread: New Mill|
Paraffin stove maybe?
|Thread: New design of mains plug?|
Posted by Roger B on 01/04/2020 11:47:50
The harmonised colour coding, Brown, Blue, Green/Yellow, was bought in to deal with a number of safety issues on the biggest being the German use of Red for the earth conductor as they thought it was the most important. As others have said the colours were chosen with colour blindness in mind, especially the bi-colour earth.
I can remember when we got the email round at work advising of the new harmonised colour schemes.
Telecoms power normally uses -50v and the old convention was black earth and blue -50v.
New convention is Blue earth and Grey -50v, so the blue changed use from the relevant date.
The exception was System X digital, which used overgrown twinned figure of eight cable (10mm ) for power supplies.
The plastic was all grey with the -50v battery being marked with a blue stripe.
From the relevant date, we had to use the same cable, but with the colours reversed.
Hence a fuse panel rack was likely to have mixed colours of wiring in the same cabinet (with appropriate warning labels of course)
Appropriate for today, the email was dated 1st April, so no-one believed it at first.
|Thread: What are you doing to stay safe|
Maintain g a very low profile.
When I do lever the property, as opposed to the house, such as to go to the open air market's greengrocer, I leave the route to the bathroom with open doors for my return; to wash hands without further touching anything.
Also, as I leave the house, I cover the outside door handles with a bit of clingfilm, which I remove and bin on the way back in. The route inside the house to the sink, already being clear having previously left the interior doors open.
The cling film on the handles has other advantages as I'm trying to teach myself to scrape a flat surface; Micrometer blue everywhere.
|Thread: Manual for Elliott / Victoria / Gate Omnimill 00|
I may still have a chance of picking up one of these when we are allowed to move around the country again.
Any info would be much appreciated if anyone does have anything in electronic format, though for obvious reasons, there no wild rush.
Really not sure how much these normally sell for though; I've not check the wear or anything on this one, though it will come reasonably equipped in terms of milling chuck, vice etc.
I'd likel;y use it to complement the Centec 2b and sell on my Dore Westbury, though I might miss the long column on the latter.
|Thread: Machine feet/mounts?|
If you type "adjustable feet" into ebay, there are loads of cheaper, non-resilient mount, ones for not much money.
I'm using a mixture of the lighter ones with the ball ends on the threaded bit and, for the heavier machine, this type, which are a but stronger.
They seem to work well enough
|Thread: Myford Power Cross Feed Screws & Nuts|
Richard, lubrication, and main bearing adjustment, was the reason I was wondering if you had a manual.
I gave the main spindle bearings a squeeze from a grease gun when I got it; the previous owner had already started cleaning it up when he decided to sell it.
They are rough round the edges, and certainly not as well finished as the genuine article, but it seems to work well enough.
If mine's anything to go by, be careful with the clutch; my one was downright dangerous as it would occasionally just engage itself. I dis a bit of work on the camming release engage lever and it's now a more positive action.
Like you I wasn't happy with the cross feed spindle, but I've not replaced it.
I smartened up the handle end of the cross slide screw, and re-bored the black support bracket to suit, as well as making a new collar adjusting nut. The grub screw worked directly on the threaded section, so now has a nylon pad.
I can also confirm that a Myford Taper Turning attachment fits OK, though the bed casting is tapped metric, rather than BSF.
I was in the process of a very slow house move (2 1/2 years) and the workshop largely remained in Sheffield; various machinery, with a pre-power X feed S7 changewheel machine as the lathe.
I spotted the 720 advertised locally and was seduced by the gearbox, power X feed and a brand new inverter motor package. It came at a good price and was installed in the new house in Buxton.
The old house is now sold and the workshop moved over here, so I have the Warco and the genuine S7 here, as well as a more recently acquired Warco GH1330 for bigger stuff.
The real S7 will go eventually, it's a bit worn and was originally painted in blue Hammerite, which I've now scraped off, and bought a tin of grey paint.
The cabinet will have to stay blue for the time being.
Posted by Neil Wyatt on 25/03/2020 12:19:58
Posted by J Hancock on 25/03/2020 11:58:33
No valid DoT and the car is on the road ?
What do the insurance people have to say about that ?
'Goverment are working with insurers to ensure people will be covered'
Assuming the rules are followed, surely it will have an MOT as the government are extending your current one by 6 months.
You won't have a paper copy, but it will show on the on-line MOT checker as everything catches up.
|Thread: The Home Workshop Dictionary - FREE E-BOOK|
That seemed to work OK, Thanks Neil.
|Thread: Myford Power Cross Feed Screws & Nuts|
Posted by Richard Black 2 on 24/03/2020 12:32:26
Sorry to be joining on an old post but would be very grateful if anyone could tell me the dimensions of a super7 power feed cross slide nut and screw please?
I have a Warco 720 (super7 Taiwanese copy) which is not a bad lathe but the nut seems to be worn and I would like to try and find out if the Myford one will fit.
I would be very grateful if anyone could help please.
Thank you very much,
I too have one of those, but unfortunately can't assist with the query as my real S7 is pre Power xFeed
I don't suppose yours came with a manual did it?
Hello and Welcome by the way.
p.s. I can confirm that the 33/34 tooth gear wheel addition works OK for cutting metric threads, though I needed to get a genuine Myford drive gear to mount them on.
|Thread: Lathe levelling|
As a non trained mech engineer, I was networks and telecomms, I do wonder if it's really necessary to have the bed level in order to turn parallel, unless we are talking large lathes.
I can obviously understand it on larger industrial stuff, where headstock and tailstock ends are on separate pillars; I've even read of very long dockyard lathes whose accuracy depends on the state of the tide.
For most smaller stuff, built onto a rigid cabinet, surely it's really twist in the bed which is important, along with tailstock alignment.
How could a ship's lathe turn parallel unless it were in dock or the doldrums.
|Thread: Record no 1 vice jaws seized - removal?|
Normfest Oxim Ultra seems to work as well as most things I've tried as a penetrating oil, as does the Lidl one, though the latter only turns up occasionally.
Also worth a try is a 50/50 mix of ATF and acetone.
One I've not tried it yet, though I now have some in stock, is tincture of iodine.
I saw that one advocated on a British Motorcycle group on Facebook.
I too used an impact driver bit, which I re-ground previously to have a shorter spade part, tightened in the jaws of the vice and with a large spanner.
If anyone is planning on replacing the jaws with new hardened ones, drop me a PM as I know someone who makes them to order. Record No 1s might be a bit small to be cost effective though
Edited By peak4 on 23/03/2020 12:54:47
|Thread: ventilator production coronavirus|
I would suggest it's not that easy, as modern ventilators are exceedingly complicated.
Germany ordered bucket-fulls some time ago, as did one or two other countries, and have allegedly managed to find some extra (Spanish) nurses from somewhere.
For some reason, we seem to be lagging behind many other governments in a variety of ways.
This Financial Times link contains an embedded letter which sheds some light on the more modern kit.
Essentially, as well as the kit, you need the staff who know how to use it.
I have no idea of the authenticity of Dr G's comments, but they do provide valuable explanation, assuming they are valid.
For the record, I am not an NHS ICU consultant in the South East of England... But if I were to imagine having done ICU since 1986 I might make some observations:
The old ventilators were essentially mechanical bag squeezers that inflated the lungs and then paused to let the gas out, before repeating the cycle. They had little sophistication, but meant that a person did not have to physically squeeze the bag, unlike the medical students who were enlisted to do this in 1952 during the polio epidemic in Copenhagen.
In the early 1980s we were ventilating patients after long operations, cardiac operations, head injuries, sepsis and the like. The key point is that the lungs were not the primary cause of the need for intensive care. Indeed, if the lungs started to fail, with Adult Respiratory Distress Syndrome, as it was called then, the patients usually perished. It was during the 1980s that more sophisticated ventilators were developed. We started to get Siemens machines which allowed alterations in the timings of inspiration and exhalation, they also allowed us to put positive end expiratory pressure into play. This meant that the patient would breathe out against resistance. The effect of this is to hold the tiny airways open and the alveoli, and to push fluid back into the circulation instead of having it sitting in the lungs and reducing oxygenation.
These machines are now the norm. They are smothered with sensors and we can measure most things and record changes that allow us to adjust the therapy. For example we can calculate lung stiffness and how it is changing with our therapies. We cannot do this with bag squeezing.
The sensors make the process less dangerous. If we get it wrong, the ventilator can cause barotrauma. At its most extreme we blow a hole in the patient's (diseased) lung and then we have a tension pneumothorax, which is rapidly fatal unless we stab the chest and insert a drain to allow the lung to re-expand. More often, the barotrauma causes microscopic damage that delays or prevents the sick lung from healing. The sensors also alert us if the tubing kinks or disconnects. Unchecked these simple things are quickly fatal.
So, to run a patient with acute lung injury/pneumonia as their primary diagnosis, to keep the oxygen going to the vital organs, we need all the sophisticated settings and sensors and alarms. We also need a highly-trained ITU nurse who can operate the machine, take the readings from it and alert the ITU doctor to adverse changes. When we introduce new ventilators, it takes several weeks for our nurses to become comfortable with them (think airline pilot and new aircraft type). We start them on simple cases where the ventilation settings are basic and the patient is not needing a variety of drugs by infusion and other time-consuming tasks. Once the nurses are happy with the new ventilators, we start to use them on the sicker patients; the nurses are, by now, more reflexive in their use of the ventilators.
So, imagine the perfect storm of non-ITU nurses being put in charge of a desperately sick patient who is attached to a ventilator that none of us has seen before! Mark my words, there are no spare ITU nurses. We will have to start using nurses who have not got the extra qualifications. They will need to be given reliable machines with good ergonomic fail-safe designs.
(I still remember two patients that we killed in the 1980s simply because their ventilators were not properly assembled; the modern machines would alarm and actually describe the fault on their displays.)
Currently all of our machines are German or Swedish. They have undergone years of development so that the alarms give us information according to urgency, the controls are intuitive, every kind of ventilatory mode is possible. They have been tested and CE marked and the companies take responsibility for their machines, through produce liability.
If the government introduces the Johnson Mk 1, or it arranges for a digger company to copy established ventilators, will Matt Hancock assume responsibility for any deaths due to malfunction, or due to our nurses not knowing about the machine's foibles? At present, we may get these machines (possibly) but we would be very unlikely to use them without assurances from the NHS that individual nurses and doctors would bear no responsibility if the machine malfunctioned and destroyed a patient's lungs, or simply failed to deliver 16 breaths per minute 24/7.
Without the nurses we are just window dressing. Sadly, many of our excellent and numerous Spanish nurses have left, because they only accrue seniority pay on their return to the Spanish system if they are working in an EU country. Our loss, Germany's gain apparently.
|Thread: Outside jaws for Pratt 160mm 3 jaw chuck|
Try Home and Workshop, I think they keep quite a few used sets.
|Thread: Hi from Sheffield|
Hello and welcome,
Not long retired and moved from Crookes to Buxton, in search of more affordable space and a decent workshop/garage.
Also a selection of bikes and a marlin kit car, though not self built.
I guess you already know good places to obtain materials over there, but ask away if I can be of (minor) assistance.
Edited By peak4 on 17/03/2020 14:09:38
|Thread: This is me...|
Hello, recently ex Sheffield and now retired to Buxton.
Posted by Nigel Bennett on 16/03/2020 13:56:03
Similar to Bill, I've used Unimat chucks in both Myford & Boxford lathes; I turned up a flanged mild steel spigot with M14 x 1 thread on it and the setup is excellent for gripping little fiddly things that can't easily be held in bigger chucks.
Yes I did exactly that, on spec, at Doncaster show a couple of years ago, got it home then realised mine's a Simat, so 14x1.4mm
Yes, I've now made one that fits, the main advantage for me is that the jaws are smaller, so they fit and expand into smaller holes.
Posted by Neil Wyatt on 16/03/2020 16:33:34
Chloroquine does show promise; it was sold out about a week ago...
Unfortunately as an old generic drug mass producing it won't make anyone rich, but hopefully someone, somewhere is ramping up production just in case.
I spotted this article yesterday, so maybe someone is thinking ahead, but not announcing it widely to save panic buying depleting national stocks.
I assume, as a generic drug, it should be easy to ramp up production though.
The Australians are doing clinical trials, but not heard about any over here.
|Thread: Slip gauges - dealing with patches of rust|
Before going as far as an abrasive like Scotchbrite, the motorcyclist's trick for removing rusts spots from polished chrome, is to use crushed aluminium foil and Coke ( or a brand equivalent that still has a bit of phosphoric acid in it.)
I've soaked rusty stuff in normal vinegar, which seems to turn the rust black, and soften it; might take several hours, or even overnight, so it will be hard to monitor for possible damage.
I've personally not had it affect the parent metal.
One than then just brush it with a soft stainless brush under a hot tap, and immediately spray with a water repellent such as WD 40
The hot tap means it will self dry after a wipe with a towel, as re-rusting starts very quickly.
N.B. I've never tried either of the above with slip gauges.