Previous in Forum: Ship Breaking   Next in Forum: Is "Real Life" Engineering Anything Like What I'm Learning in Class?
Close
Close
Close
8 comments
Member

Join Date: Aug 2008
Posts: 9

Pre ISO Metric Sizes

03/16/2010 2:10 AM

Does anyone remember when the ISO metric standard was introduced and what the smallest sizes were before? I work on a lot of pre 1980's camera equipment and my unsorted tiny screw pile is getting too big. I want to sort them but the diameters are all over the place.

Thanks

Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

Comments rated to be Good Answers:

These comments received enough positive ratings to make them "good answers".
Guru
Technical Fields - Technical Writing - New Member Engineering Fields - Piping Design Engineering - New Member

Join Date: May 2009
Location: Richland, WA, USA
Posts: 21024
Good Answers: 793
#1

Re: Pre ISO Metric Sizes

03/16/2010 3:57 AM

There are low- to medium-power microscopes or jeweler's loupes that have reticules built into the optics. A reticule is any combination of crosshairs or finely graduated scales, and you should be able to find some that will give the required resolution. I would Google on something like "inspection instruments" or "thread gauges".

__________________
In vino veritas; in cervisia carmen; in aqua E. coli.
Register to Reply
3
Power-User

Join Date: Mar 2009
Location: United Kingdom
Posts: 308
Good Answers: 28
#2

Re: Pre ISO Metric Sizes

03/16/2010 4:09 AM

This might help.

http://www.teamonslaught.fsnet.co.uk/threads.htm

scroll down for a fairly comprehensive list of screw threads.

Regards Woody

Register to Reply Good Answer (Score 3)
Member

Join Date: Aug 2008
Posts: 9
#6
In reply to #2

Re: Pre ISO Metric Sizes

03/18/2010 1:46 AM

Thank You Woody!

That chart is exactly what I was hoping for. Can't wait to turn it into a poster!

Thanks again,

Albert

Register to Reply
Power-User

Join Date: Mar 2009
Location: United Kingdom
Posts: 308
Good Answers: 28
#8
In reply to #6

Re: Pre ISO Metric Sizes

03/18/2010 10:58 AM

Your welcome ..it is actually one of my webpages

Regards Alan

Register to Reply Off Topic (Score 5)
Commentator

Join Date: Feb 2008
Location: Nottinghamshire, England
Posts: 92
Good Answers: 3
#7
In reply to #2

Re: Pre ISO Metric Sizes

03/18/2010 4:47 AM

GA Woody! One of the most comprehensive answers to a post ever! Made my offering look a bit feeble!

__________________
You're never too old to learn.
Register to Reply
Guru
United States - Member - New Member

Join Date: Mar 2010
Location: In the pool because it is too hot.
Posts: 3054
Good Answers: 141
#3

Re: Pre ISO Metric Sizes

03/17/2010 12:49 AM

By my knowledge, the demand for metric system has been created by math scientists in the 16 th century in then "Flanders" now a part of Belgium. Simon Stevin should have used it first. The creation of miniature bolts and nuts happened centuries later, and literature points to Switzerland, France, Austria and Germany as initiators. I have no dates. The smallest bolt our assortment starts with is 0.4 mm diameter. However clockmakers used to use their own "creations" in the beginning, what gives you a lot of different possiblities.

__________________
Plenty of room here
Register to Reply
Guru
United Kingdom - Member - Old New Member

Join Date: Jul 2005
Location: South east U.K.
Posts: 3646
Good Answers: 93
#4

Re: Pre ISO Metric Sizes

03/17/2010 7:15 AM

According to Machinery's Handbook;

International Metric Thread System.— The Système Internationale (S.I.) Thread was adopted at the International Congress for the standardization of screw threads held in Zurich in 1898.

__________________
I didn't have a really important life, but at least it's been funny (Lemmy Kilminster 1945-2015)
Register to Reply
Commentator

Join Date: Feb 2008
Location: Nottinghamshire, England
Posts: 92
Good Answers: 3
#5

Re: Pre ISO Metric Sizes

03/17/2010 9:17 AM
__________________
You're never too old to learn.
Register to Reply
Register to Reply 8 comments
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

Comments rated to be Good Answers:

These comments received enough positive ratings to make them "good answers".
Copy to Clipboard

Users who posted comments:

dvmdsc (1); intalekshul (1); M Daniels (2); Nigh (1); Tornado (1); woodygb (2)

Previous in Forum: Ship Breaking   Next in Forum: Is "Real Life" Engineering Anything Like What I'm Learning in Class?

Advertisement