When is 9mm not 9mm?

Not as really irritating as the comment without repeating the question/answer that relates to a previous post, several pages ago, and the reader is left to guess what on earth it is in response to!

Bill, it's the only way to ensure that the answer is actually to the question asked..

Brian

You know the old saying, "Believe nothing you hear and half of what you see "

Kids in shops and stores these days dont even know that there was another system in use in "Olden Times".

In fact,they dont even understand the system they have !

Talking about wood sizes,soft wood is measured in Metric,but hard wood is sold in Imperial sizes. It appears that hard wood is traded in American Dollars and they still use Sq feet and Sq inches,no matter where the timber ends up.

It may also be partly because a lot of construction timber comes from Canada and they are metric?

Softwoods have been traded in metric lengths and volume since the eighties, at least. In the early nineties hardwood was still being traded in cubic feet - but changing over slowly. And, yes 0.3m is still the incremental increase in length. Presumably old mills were set up to cut in feet and instead of changing to 305mm, it was rounded to 300mm as the closest sensible figure.

As far a ‘kids are concerned, there are many out there that still quote their imperial height and weight - but often don’t know how many inches in a foot, or pounds in a stone (and haven’t a clue what an ounce is)!

Another combination to watch for is 1/4" and 6mm in brass and copper round bars. The last two suppliers I've used off eBay don't differentiate between the two sizes...When I asked why they had shipped 1/4inch instead of 6mm, it was because they had 1/4inch in stock...

This explains how my wiggler set has a 0.050" cylinder and a 6mm ball! Near enough, it's round innit?

Howard

The seller kindly offered me a refund.

I said I would prefer a packet of 8mm balls, if that was OK? After all they checked the rest of their stock.

Got a nice packet of 5/16" (7.94mm) balls today.

Do I laugh or cry?

Neil

You could argue there's a perfectly-formed 6mm bar inside the 1/4" one...

Fact is, a lot of stock is still imperial, but many ebay buyers (and sellers) only understand mm...

The lack of engineering understanding is sad.

People buy 4-start 8mm leadscrews for their 3D printers with 8mm pitch and think it's going to give them more accurate positioning than using 1mm-pitch M5 studding when fitted to a stepper motor. They also wonder why the carriage falls to the bottom whenever the machine is switched off.

Neil

7.94mm should be fine for taking out a rabbit with a catapult...

Been struck by the 'jinx' ordered a floor mat 150x90 cm it arrived today quite promptly I must add opened it to find a 140x80 cm mat

H

.

Agreed, David !!

I have edited Bill's comment a little, just to demonstrate that it can be done tidily.

We have a couple of contributors who habitually use uncredited quotes of a few words, copied from some earlier post; and seem to presume that others will follow the continuity.

Yes, Bill ... wholesale quoting of long posts [sometimes with pictutes] is an annoyance, but if responding to a particular point, I think it is only proper to reference the source.

MichaelG.

Michael

And another irritation is those that have not figured out that to cleanly quote another's post without getting their text jumbled up with that they are quoting, they need to start their post BELOW the vertical line on the left, of the post being quoted.

That's because the online editor puts one character position below that quoted text. If you miss that - or somehow delete it - you have to hover at the top of the box and use the red arrows to get it back. Like so much with this editor, it's not exactly an obvious procedure and because of that I don't find it nearly as annoying as the massive over-quoting that goes on (here and just about every other forum) because people are too lazy or too ignorant to edit their quotes down to the minimum that's required.

The wholesale quoting of everything in a previous post, including multiple pictures, that happens here is a bad joke.

I'm very inclined to give the other guy a break. Not everyone is good with computers! I read posts whatever - lots of really good stuff comes from chaps who haven't quite mastered the technology. I don't judge spelling and grammar either - we're all friends here.

Dave

Agreed

Edited By David Standing 1 on 06/01/2018 18:43:02

Spelling and grammar - how does that work for engineers?

I once worked in the engineering dept of a national bank and was on shift when one of the Xerox cut sheet printers wouldn't run. These printers had a paper tolerance of +- 1 mm. We had ordered 20 million sheets of headed paper and they turned up 1 mm under tolerance. When phoned the supplier they couldn't see the problem until I pointed out they had short changed us by 20 kilometres of paper!

Cost them a lot of money!

When is 9mm not 9mm?

When it's .38" ACP or .380" Browning Short, of course!

Or when it's 9mm Makarov, when it's .364"

But I guess you knew somebody might start this one, and it could go on for a while...

Edited By Mick B1 on 07/01/2018 11:00:51

Adjusts shades.

>click<...