Here is a list of all the postings Bazyle has made in our forums. Click on a thread name to jump to the thread.
|Thread: Ally Pally Exhibition|
I will be on the St Albans stand on Saturday much of the time but of course sod's law means I won't be there just at the time you find us. Hope you enjoy our exhibits anyway.
|Thread: Creality 3D For Christmas - Impressions so Far|
The grey one is a Mod1 20 degree 30 tooth changewheel printed in PLA on a Ultimaker Pro 3 (as an obviously necessary test piece for the printer at work) which is about £1600. 25% density took 50 minutes. The other gear is the original injection moulded Hobbymat gear in perhaps nylon.
The design was done in Freecad and the outer across teeth diameter measurement is just 7 thou greater than the original.
In use they fit on a steel bush with a key to join two together with a 8mm hole to go on the banjo stud. I might try a printed bush or even a fully printed pair of gears to reduce the effort of setting gear trains. The possible drawback of running plastic on the steel stud is dirt and swarf pickup making a grinding lap. Perhaps a thin brass tube would help that.
|Thread: Hobbymat MD65 - help figuring out accessories (photos)|
The lathe tool is damaged probably when a parting off cut jammed. scrap.
The 'curved cutouts' are to weaken the screws because they are only going into a thin bit of cast iron - be careful even so and even more so with the normal screws on your other toolpost.
I see you have a 3D printer. Later I will post on another thread a picture of a printed MD65 3 tooth changewheel.
|Thread: Making leaf springs|
I recall something, but it might have been in EIM 25 years ago when Doug Hewson? was doing 5in waggon articles. The main interest was how to decide how many tufnol leaves to put in to weaken it for scale performance.
|Thread: Bottled Gas Suppliers|
The SGS site doesn't give prices "contact agent" minefield, so some prices from users would be interesting. There is an agent within 3 miles of me though. They sell propylene - is that hotter than propane? might help Dave above.
Hobbyweld website won't work with my browser or something. However they are all over ebay and I notice they mention 137bar while SGS mention 200bar so worth checking that aspect wrt actual volume of gas.
|Thread: magic 127 TOOTH ?|
It might be easier to understand Neil's explanation above if you realise that when using 127 it is a Driven gear, and when using 63 it is a Driver which is why it is not trying to replace the 127, just the lucky bit of maths he mentioned.
As 63 is not prime you might be able to get the 7x9 factors in with other gears. If you can fit another stud on the banjo you might be able to use a 6 gear combination instead of finding a 63 tooth gear.
However sometimes the maths can work with 63 driven - so 25, 63, 25 ,35 ,50, 45 is half the error of the above.
Given that lathes already existed when metric was invented it is really remiss of them not to have thought of all this and tweaked the figures to make the ratio 256. Napoleon would never have realised.
|Thread: Australian Bush Fires|
|Thread: The cultural status of engineers in the UK|
" the girl who came to wire in my cable TV installation is described as an engineer. I might add that I was delighted to see a female technician "
When I started work that employer had a Professional Engineer grading system for graduates and a separate E scale for HNC, HND and trades, and an M scale for managers. Dress was casual so if anyone came in in a suit it was assumed they were going to a promotion board, or an external job interview in the lunch break. When we recruited a chap with 3 years experience in the old GPO he came in wearing a suit and told us that their Professional grades were all required to be suited whether up a tower or down a manhole to maintain their status.
"Please don't lets get started on this hoary old chestnut yet again" Your TV has an off switch. If you don't like the program you are not force to watch it.
|Thread: New legislation that could affect us all.|
Most people under fifty have probably never encountered a high level cistern but still use the term 'pulling the chain' on occasions. The old bell mechanism was so reliable, and the pump type not too bad but modern all plastic air operated things are horrendously unreliable. At least we don't have too many of the leaky American flap valves - yet.
Can you still get Jeyes paper packs? Loads of the square dispensers on ebay! solves the problem of which way round to fit it.
Edited By Bazyle on 09/01/2020 17:36:31
|Thread: Swisstec machines from Pro Machine Tools|
Just another importer who has ordered a couple of containers full with a different paint scheme. Made a few tweaks to the spec to differentiate them. Could be PMT themselves establishing a house brand or wanting to distance themselves a bit if there are complaints.
|Thread: Ebay being clogged up by certain sellers|
Just been on with my usual search and someone is listing 1 inch nails individually at £5 + postage.
You don't need the advanced section, just one of the filters on the left is for UK.
|Thread: Choice between cheap mini milling machines.|
Dore Westbury mills are becoming more common on ebay, I've seen half a dozen last year, as the generation that built them are dying off.
If you have a limited size workshop you just have to accept that you cannot make spare parts for the Titanic. If you need to drill big holes a lot build a bigger shed, then get a big radial arm drill. Otherwise do what countless modellers have done and drill a circle of small holes, saw out the waste and clean up with a file.
|Thread: Cast Iron Watch Case|
Why think of CI and not plain steel plated?
|Thread: Creality 3D For Christmas - Impressions so Far|
By the way for non round figure DPs and people wanting to tweak the size of the final gear (mentioned by someone early on), in FreeCAD gear function in the 'modules' entry box you can put a formula in there with diameters and DPs and it will evaluate it on the fly.
|Thread: BUDE area - any members please|
If no local response it might be worth trying the Holsworthy Men's Shed as even if they do not have metalworking equipment they may well know some people who are model engineers.
|Thread: Hobbymat lathe - couple of questions|
I would slow down a bit before ordering steel plate to make the t-slotted plate to decide if it is useful. It looks like the plate is intended to bolt to the angle plate - see the 4 holes in the plate that are used for holding the vice. However you might as well just drill a pattern of holes in that side of the angle plate. T-slots can be a bit of a pain as they are never where you want them and the t-nuts slip out of place, Nice M6 threaded holes are much better behaved.
Have another look at the minilathe gears as the centres may not need modifying. Since mostly the gear fits on a boss you can just make a suitable smaller one, Look at the dog clutch on the leadscrew where one gear fits - probably can make one to fit the minilathe gears. That only leaves the one to be fitted to the back end of the mandrel that needs a 20mm hole so only a few need to be of that size and perhaps can be printed. (see the other thread on 3D printing.
|Thread: Compression springs for the new year|
Happy new year Jaques. I do enjoy your new year pictures.
|Thread: 3mm drill hole too tight for 3mm bar|
Just to complete the picture. As Jason mentioned drills are most notorious for drilling oversize especially when they are not sharpened symmetrically which always happens when done manually by those 'I don't need no stoopid drill sharpening jig' experts.
Wood of course is another matter. There is a post on here somewhere from the late John Stephenson talking about how when he worked for a piano manufacturer he had to spend hours selecting drills to give the precise end result required, not even getting the same result from two drills of the 'same' size.
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