Thread: What did you learn today?

Originally Posted by grunto

I bought 2 of these a few months ago - the earth wires weren't connected to anything, just stuffed behind the board the LEDs were mounted to. Be careful!

Yep I earthed the Alum frame so its all good.

l have learnt today that cleaning up weld bevel before welding was very importand to avoid porosity inside the weld and maybe sometime weld cracks!

Originally Posted by sembul

l have learnt today that cleaning up weld bevel before welding was very import and to avoid porosity inside the weld and maybe sometime weld cracks!

Flux can get damp through humidity /wet weather and also can give rise to porosity. Also re using flux that has not been cleaned will do it as well.

If you can locate a copy of the Lincoln Welding Procedure Handbook from Lincoln Electric,the book is pure gold in references to assist in settting sub arc and curing problems.
They are available only through Lincoln Electric as far as I know.

Grahame

Hi sembul,
I'll move your post to WELDING. This thread is not the most suitable place for it.
look for your original post
Looking for SAW wire S2Mo an Ti support

Grahame

I hate tapping threads more so just as you are qbout through the tap snaps with just a tiny bit either side to try extracate the thing.

I learnt that you can get Triple Square/Polydrive internal bit sets. Never come across them before. Not the same as Torx.

I learnt that my Mrs should not be left unsupervised to light the fire beads for the spit roaster...

Originally Posted by wheelinround

I hate tapping threads more so just as you are qbout through the tap snaps with just a tiny bit either side to try extracate the thing.

You need to get with the times and get some spiral taps, magic little things.
Rgds,
Crocy.

Originally Posted by Old Croc

You need to get with the times and get some spiral taps, magic little things.
Rgds,
Crocy.

Alright for you rich blokes others like us need a 2nd mortgage.

Yep, spiral taps for blind holes and gun taps for thru holes.

Cheap ones here https://mcjing.com.au/machine-tap.html https://mcjing.com.au/gun-tap.html
Suttons on special here https://generaltools.com.au/product-...-spiral-flute/ https://generaltools.com.au/product-...taps-gun-taps/

or for really low cost (been using theirs for years now):
Banggood - https://www.banggood.com/Drillpro-M3...p-1458605.html
and
https://www.banggood.com/Right-Hand-...-p-944071.html

Inserts for face mills are not necessarily available from multiple suppliers as they are often not ISO standard. Need to go to the original face mill maker....grrr. Yeah yeah you all knew that but I'm trying to catch up....

Originally Posted by Mk1_Oz

Inserts for face mills are not necessarily available from multiple suppliers as they are often not ISO standard. Need to go to the original face mill maker....grrr. Yeah yeah you all knew that but I'm trying to catch up....

What kind of face mill? I would have thought that, unless you've got one of the whizz-bang fancy ones, they'd stick to a standard insert. It'd certainly be surprising if a generic/entry level face mill had proprietary inserts

Originally Posted by elanjacobs

What kind of face mill? I would have thought that, unless you've got one of the whizz-bang fancy ones, they'd stick to a standard insert. It'd certainly be surprising if a generic/entry level face mill had proprietary inserts

I've got a 45 degree high rake facemill from H&F, which in theory takes SEKT inserts. Problem is the Chinese 'Mitsubishi' inserts I have don't carry the relief angle all the way to the cutting edge, there's kind of a chamfer for the last 0.5mm or so. Due to the amount of rake the inserts are presented with, this chamfer hits the workpiece before the cutting edge. I had to touch up all 5 inserts on the diamond disc to get it cutting rather than rubbing and vibrating like crazy. Not a problem of a proprietary insert so much as a quality problem, I think, and they'd be fine if it wasn't for the amount of rake the holder presents them with.

I don't know what brand face mills they are. Took the insets to GeneralTools and they couldn't help unless I could show all the numbers and id off the mills.