The holy grail of steel rulers

[Rorschach]

Never quite understood the need for 0.5mm graduations on a rule, seems pointless to me.

Well thats a daft thing to say

Although I must admit, I have never used them and they do distract from the single increments

1mm increments are close enough together that I can estimate 0.5mm easy enough, and if I need more accuracy then I am not using a rule anyway. For drawing my mechanical pencil has 0.5mm leads so that both removes a level of accuracy but also makes it easier to estimate that 0.5mm. As you say the lines just distract and make it all blur together.

 

[MikeJhn]

Well spotted sir, I must confess I didn't think to check amazon, although it looks like that's the only size available there, and it's coming from Japan so you may be waiting a while for it!

I had a look on the Shinwa site to get the code number, 13131. A Google search of Shinwa 13131 and Amazon came up as one of the top results.

I find small rules handy to keep next to machines but they are so thin they are difficult at times for me to pick up. The 13131 with the raised end sounded like a good solution. Nice to know as well that I'm not the only person to have this problem! :lol:

With the loss of sensitivity in my fingers, (Arthritis) its difficult enough to pick up a knife and fork, but I don't seem to get that problem with a wine glass :lol:

Mike

 

[Phil Pascoe]

Of course, you could always bend up the end of any ruler slightly ...

 

[transatlantic]

Magnets! How do they work!

 

[ED65]

https://www.fine-tools.com/shinwa-ruler.html
I've ordered a few different lengths, can't wait!

I was expecting them to be 'spensive but they're not too bad. With postage added I imagine they won't be particularly cheap though.

You could have walked into any art-materials shop worth its salt and picked from a range of steel rules with no half-mil divisions. I buy new rules about as often as I buy a house but I just happen to have bought a new 300mm rule in just such a place not one week ago! I then spotted a set of two in Maplins for a lower price only a few days later, but I really like the looks of the one I got so I don't mind so much.

 

[Phil Pascoe]

http://global.rakuten.com/en/store/sele ... /10025821/

Another one.

 

[paulrockliffe]

I sometimes think that the Holy Grail would be a ruler with large increments in inches, but the smaller increments in 10ths of inches and a smaller increment in 20ths of inches. Best of both worlds then, inch scale with decimal counting so I can do the addition and subtraction in my head.

 

[Phil Pascoe]

engineer's rules. Pain in the rrse You end up using 20ths for 16ths.

 

[MikeJhn]

Does it really make a difference, if you are measuring in the same increments for the work you are doing surely it will all work out in the end no mater if its metric or imperial, 10ths/20ths or 16ths just use the same ruler.

Mike

 

[Phil Pascoe]

Assuming all your rulers to be the same - I threw away a perfectly good one marked in 20ths as I would measure something in 16ths one day then go back another day to do the job and pick up one marked in 20ths, they are so close in size as to not be immediately noticeable ...

 

[MikeJhn]

As I said, if you are measuring in the same increments, perhaps you can, but I can't cut timber to the sort of tolerance's that the difference between a 16th and a 20th would make a difference.

Mike

 

[Phil Pascoe]

You probably can to cut to the difference between say, 7/16ths and 7/20ths, though. It's near 2.2mm - big difference on perhaps the width of a tenon.

 

[MikeJhn]

The difference between 7/16ths and 7/20ths is 0.57mm by my calculations?

Mike

 

[Phil Pascoe]

2.36mm.

 

[transatlantic]

Come on guys!

1 inch == 25.4mm

7 * (25.4 / 16) = 11.11mm
7 * (25.4 / 20) = 9.89mm

11.11 - 8.89 = 2.22mm

 

[JSW]

Come on guys!

1 inch == 25.4mm

7 * (25.4 / 16) = 11.11mm
7 * (25.4 / 20) = 9.89mm

11.11 - 8.89 = 2.22mm

I think Rachel Rileys job is safe for the moment

 

[Beau]

The later part of this thread is good advert for the metric system

 

[Phil Pascoe]

By the bye. I made avoidable mistakes with that rule.

 

[transatlantic]

Come on guys!

1 inch == 25.4mm

7 * (25.4 / 16) = 11.11mm
7 * (25.4 / 20) = 9.89mm

11.11 - 8.89 = 2.22mm

I think Rachel Rileys job is safe for the moment

oh ffs!

Got the right answer though!

 

[Phil Pascoe]

The later part of this thread is good advert for the metric system

Not if we're both getting it wrong, it isn't.