Here is a list of all the postings A Smith has made in our forums. Click on a thread name to jump to the thread.
There's a lot of misrepresentation going on by the politically motivated who care more about undermining the government than they do about people. That nasty diatribe, posted on here, about industry's involvement in production of ventilators was a good example. ("The Johnson MK1" etc)
|Thread: Easter holiday in Tintagel? Bring your own.|
It's a local shop for local people!
|Thread: QCTP dilema?|
If purchasing the Dixon type, I'd council caution, try to have a look before buying.
I recently bought two toolholders from Chronos for my Myford/Dixon system, purchased from the Nottingham factory many years ago. The new toolholders don't fit. I'll have to return them I've bought toolholders from Chronos in the past that have fitted perfectly. 5 or 6 years ago, I had to return one to RDG for the same reason, the replacement supplied was fine. I have several UK made toolholders, additional to the Dixon originals & they've all been fine.
Half life? Does a virus have a half life? I thought that only applied to radioactive isotopes.
|Thread: What Did You Do Today 2020|
First saw Red Kites near Betws-y-Coed about 20 years ago, lots to be seen over Didcot last spring & recently two circling over the Tamar near Calstock.. Good to see.
|Thread: Ally Pally Exhibition|
I was there on Friday, quieter than usual, early on, but lots of people by lunchtime. Less traders & less models than previous years. Still enjoyed the show, the secret is to talk to the club members manning the stands. Amongst others, I had a chat with a Swiss SMEE member about high impedance op-amps & other things. I also spoke with the gent building the Big Boy, he's a better man than I am! As it's a long way darkest Devon to London, I normally combine the ME show with some other things on my to-do list. This year, Brooklands and the RAF museum at Hendon. (Also some of the National Gallery, Borough Market and a wander around the sights. A good use of three days and a senior rail card.
|Thread: Airline Fittings?|
I have a mixture of PCL and euro fittings. All the fittings that I have (of both types) have BSP threads, so it's easy enough to adapt from one to another. I don't know if all euro fittings available have BSP threads.
|Thread: Slip gauges|
I'd suggest that slip gauge sets come on the market reasonably frequently as the estates of model engineers are dispersed. I bought a set from the much-missed tool shop in Colyton, as with much of David's stock, it came from someone that had moved into care. I don't use it very often but find it useful on occasion.
|Thread: MIDLANDS MODEL ENGINEERING EXHIBITION|
I was there on Thursday and would agree that it was vey busy. Long queues for food & drink at lunch time - so I ran on my over-substantial reserve until the queue shortened. I miss the large traders, Chronos, Warco etc and some of the smaller ones such as Hemmingway. Having said that, attendance for a trader is a commercial decision, no more or less, so criticism is pointless. I mainly go to see the exhibits and talk to like minded people. I was not disappointed & look forward to going next year.
|Thread: Home built trailer|
Two general purpose trailers and three dinghy trailers built over the last forty years. I only have one g.p. trailer now but I believe all the others are still in use. Quite a lot of overthinking above. How would anyone know whether your privately built, lightweight trailer for taking stuff to the tip is new or refurbished? The new trailer would just join the enormous fleet of privately built bike, boat, camping, general purpose etc. trailers that already exists. I think the best advice posted above is the suggestion to check with the tip on the maximum size of trailer that they will accept.
|Thread: Beamish Museum|
Went to Beamish last autumn, thoroughly recommended. (Carlisle/Sellafield/Barrow/Giggleswick/Settle/ Carlisle by rail the previous day. NYMR the day after Beamish). All good.
|Thread: Illegal CD copy|
Careful, Fred's got an army you know...……...
|Thread: Motorcycle 'blipping'...|
I have a 1960 Matchless G3 (ex AFS) that has covered 56000 miles on the original Amal 375 Monobloc carburettor. No air filter was fitted on this model. It starts easily & runs well. It does require a rebore, new valves and guides. Doing that now.
Unfortunately, there is a continuing supply of chimps that fit loud exhausts & blip throttles, Darwin keeps their numbers in check, at least to some extent.
|Thread: Machine moving recommendations.|
There is a firm in West Yorkshire called Landylift who do this sort of thing. They advertise on the homeworksho.org.uk site. firstname.lastname@example.org I've never used them, so unable to advise further.
|Thread: A visit to Manchester Sci and Eng Museum|
It is a disease. The medical description I, "Arts based degree-ism". Publicly owned museums are now run by professional curators who, having an arts degree, have no interest in engineering and assume that the entire general public have the same outlook.
I was recently at the Black Country Living Museum, all the cars and bikes, especially the bikes, are crammed into small spaces where it is almost impossible to look at them. The curator is, "more interested in the interpretation of history, rather than artefacts", or so I was informed.
It will soon be the case that private museums, run by enthusiastic volunteers, will be the only ones that appeal to those interested in engineering and technology.
|Thread: Refitting belts on Myford Tri Leva lathe|
I've owned a Tri Leva since the mid eighties and have changed the belts about every five or six years. Once you get the hang of the adjustment process, it all works well. The speed selection levers double as clutches so stopping, starting and speed changing (between the three speeds available) is almost instant. Engaging & dis-engaging the back gear is a bit of a pain, it's more difficult to raise the spindle/ belt cover on a Tri Leva, so it's easier to leave it in position and just use the cover behind the bearing as Nottingham intended.). I have an Allen key with a shortened business end, just for this purpose.
It is important to tension the motor drive belt first because that will affect the distance between the three drive pulleys and the spindle. I now use one of the segmented, cogged belts & it has been completely satisfactory. To get the right grip, this belt should be tensioned so that there is no slack but it's not tight enough to pull the driving (top) spindle down appreciably.
Having done this, with the other three belts slackened right off, adjust the tension of each belt until it just grips. This may require a lot less tension than you expect. The belt tension should be just about discernible as the speed selection lever is pulled down. If it slips when you're taking a normal cut, just tweak it up slightly.
With the motor running and with all three levers right up, the main spindle (mandrel to some) should not revolve at all.
Hope this helps.
|Thread: Folding Bike design & build|
What an excellent piece of work!
|Thread: Using a propane cylinder for partable compressed air.|
When testing a diving air cylinder with air, with the cylinder in a pit, the test adaptor failed and was expelled at high speed, retained only by the long hose used to connect the air supply. The adaptor hit the leg of a very robust cast iron bench and cracked the leg. The remains of the adaptor looked like it had been through a hydraulic press. I was about 30 or so yards away and thought that a bomb had exploded. The individual conducting the test wasn't great on thread forms and had found an adaptor that "fitted".
I pressure test things as part of my professional life (40 years on from the above) and I would not consider re-purposing a gas cylinder for industrial use. At home? I would only consider it if I could hydrostatically test it to at least twice the working pressure. Darwin rules OK.
|Thread: Simple WorkshopTips|
Magnets are great for collecting steel swarf -as mentioned above. Like many others, I put the magnet inside a plastic bag that can be turned inside out to remove the bits without them sticking to the magnet.
More of a health & safety thing - wear gloves when MIG welding, you can sunburn the back of your supporting hand if you don't - guess how I know!
|Thread: Hemingway Dynamic Toolpost Grinder|
Really interesting. Please keep posting.
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