Here is a list of all the postings BW has made in our forums. Click on a thread name to jump to the thread.
|Thread: magic 127 TOOTH ?|
Another method is to cut or purchase or print 37 and 47 and introduce them i to the gear train 47/37 is very close to 1.27 ie 1.270270
|Thread: Homemade Lathe|
Thanks - Enjoyed that video, wish I had similar skills.
|Thread: Australian Bush Fires|
Posted with all due respect to those of us who like boats
......... and ............. we have deer and foxes and rabbits and hares and blackberry and ragwort in our paddocks ............ the rabbits and hares demolish our veg patches, didn't realise we had swapped and given you wallabies in exchange for them. Very keen to swap back if possible.
People are taking photos of the first green blushes of regrowth - Wont be long before some of the trees start to look a bit ridiculous with lots of leaves growing straight out of the trunks and branches - first response after the fires - looks like the trees have woolly jumpers on.
Edited By BW on 13/01/2020 08:39:52
|Thread: Machining a curve|
Variation on the above answers. Not intended as a definitive answer I ask because am not sure.
Could you rough it out as suggested and then use a form tool ? If too much chatter then I have read that chatter could be reduced if run the lathe backwards and tool mounted on back toolpost ?
Variation on form tool - curved piece of wood with sandpaper wrapped around it ?
|Thread: Heinrici engine|
OK I will make a response and maybe somebody who actually knows something might respond.
https://www.stirlingengine.com/forums/viewtopic.php?f=3&t=134 a liitle discussion in that thread may be of use to you.
I googled "scale up stirling engine" - have been pondering that question recently.
|Thread: MEW No. 285 Gear Cutters and Gear Cutting|
Am struggling to understand "half round tool" and how your friend uses it.
Is that shaped like a half round file and then mounted on a machine spindle
I think the clever bit is using a taper cutter to get an exact diameter, as making the 'correct diameter' cutter is a bit fo a challenge for most and is probably harder than making buttons..
I have always thought that post #8 in this thread was a brilliant bit of lateral thinking. It means that you can make single point gear cutters using the radii of standard sized end mills.
Its explained very well in the post .... no point in me rehashing it ........ have a read and then copy the spreadsheet.
|Thread: PayPal Warning|
In Australia you can buy various branded gift cards from Post Offices, Garages and Supermarkets ( ie Amazon, Rebel, Google Play etc) and visa cards good for a limited amount of money.
I've started using these instead of putting my credit card details up on web sites.
Some banks (ie Commonwealth) allow you to lock your cards for internet purchase and purchases in foreign countries and also allow a maximum limit to spends. It is easy to use an app on phone or tablet to quickly unlock the card buy something and then lock it again.
|Thread: Recommendation for Tool and Cutter Grinder|
That's an interesting looking gadget.
I googled "engraving tool grinder" and got lots of dremel type tools and a few T&C grinders between $500 and $2000
If you bought it brand new for 26 pounds that seems like a great deal or was it a lucky 2nd hand buy ?
Could you please give a link to what you bought or some alternate keywords ?
Edited By BW on 10/09/2019 08:44:13
|Thread: Any one used a digital microscope for micro turning on a lathe|
I use a 5x one of those with my little sherline, got it from Aldi a few years ago. A quick google shows that 10x ones are also available from various online shops.
...... and this chap seems to have done a good job relevant to the original question.
Are these things useful for us shed dwellers or do you have to crouch dangerously close to the spinning workpiece to get it focussed ?
|Thread: Decent Demagnetiser?|
No electronics just 4 neodynium magnets. Described somewhere in popular mechanics - and a video of a similar one is here
Edited By BW on 05/09/2019 08:44:53
|Thread: Boiler testing pump - plans ?|
Jason, Thanks for the tip about the countersunk vs a sharp edge on the hole.
Is this pressure testing pump as simple as 2 balls ( or cones ? each sitting in a countersunk hole at either end of a tube, on the pull stroke the bottom valve opens allows water in, then on the push stroke the bottom valve is blown shut and top valve blown open allowing water to exit ?
Could I make one as simple as that or is there more to it ?
.... maybe a couple of springs to close the valves and an O ring or two on the cylinder to help seal it ? .... O rings in the valves to help seal them ?
|Thread: A simple oscillating steam engine|
...................... and if you want something that requires a similar level of skill, very interesting and completely different to your first one have a go at this one
You can try raiding a few springs from old biros, I got a boxful of various size springs from Aldi for $5.00 - keep an eye out for them - I used one of those.
|Thread: Threaded Norman Toolpost|
I think you could have a few tool blocks and also keep some notes regarding what height to set the tool blocks at if you changed the tool in the slot. I guess you could slowly build up to a set of 10-20 blocks - seems to me that there are a lot of people out there who have lots and lots of "blocks" for their particular type of QCTP.
Think we were posting at approx the same time. I think thats it, will read the whole thing again maybe I missed something.
EDIT : Scanned the image from the magazine page. Got a whole heap of magzines and have been trawling through them for interesting things to have a go at.
Edited By BW on 10/08/2019 09:04:04
Locked at the top by a lock nut on the post.
But if you are cutting towards headstock, then surely the block could be pushed back towards the headstock as there is nothing underneath it to stop it it could rotate on the thread and it might simply drop away from the lock nut ?
Did anybody apart from the author ever make this one ? How did you stop it unscrewing ?
Gotta be a few different ways of doing it, however was wondering if I had missed something in the text
EDIT : Think I got it - relies upon the pinch bolt to squeeze it tight ? Would that be good enough ? That way no lock nut required and the vernier arrangement is easier to understand.
Edited By BW on 10/08/2019 08:32:16
Edited By BW on 10/08/2019 08:33:41
Edited By BW on 10/08/2019 08:51:03
Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!
You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.
Click THIS LINK for full contact details.
For subscription issues please see THIS LINK.