Re: Past discussions

Am Sun, 6 Apr 2025 16:55:18 -0400 schrieb Frank Krygowski
<frkrygow@sbcglobal.net>:

On 4/6/2025 3:59 PM, cyclintom wrote:

On Sun Apr 6 13:09:50 2025 Frank Krygowski  wrote:

On 4/6/2025 12:04 PM, AMuzi wrote:

On 4/6/2025 11:01 AM, cyclintom wrote:

Remember when I said that my bike had 4 mm screws for the water bottle
mount? Flunky told you all that I was lying because 5 mm was the
standard for all water bottle mounts. Funny thing is that my new Time
ULTeam uses 3 mm with a wide head. Perhaps Flunky can suggest why the
country of the Tour de France doesn't stick to his "standard"?

>
My $5 says it's not a 3mm screw.
Remove that screw and measure it.
>
More probably a ULS or a 7991 screw, m5x0.8 with a 3mm hex broach on the
head.

>
Agreed, although I'd bet more than $5.
>
It seems Tom doesn't know how to measure or specify a screw size.

 
Apparently the professor of mechanical engineering doesn't know what a digital caliper is or how to use it.

>
:-)  Says the only guy here who thinks those screws are 4mm! Note that
the professional bike mechanic disagrees with you!
>
I just measured one, but I'm a retrogrouch, Tom. I didn't use a digital
caliper. I used a Vernier caliper. (Do you know how to read a Vernier
scale? I'm betting on "no.")

I didn't know the term, either. Around here, a Vernier scale is called
Nonius <https://de.wikipedia.org/wiki/Nonius>, after the Portuguese
mathematician Pedro Nunes <https://en.wikipedia.org/wiki/Pedro_Nunes>

My toolset includes both a digital and a mechanical caliper.  I bought
the latter one decades ago. Often I prefer the digital one, when it is
convenient (large display, offset measurements), but sometimes I prefer
the mechanical one, because it is more robust.  Sometimes, simplicity
counts.

The same applies to measuring tapes.  I own a laser measure (PLR 25 from
Bosch), which not only allows me to measure distances quickly, but also
to measure and calculate areas and volumes.  But often, a tape measure
or a folding ruler is a better fit. It depends.

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