Calipers

[Tom Del Rosso]

Trying to buy a set of calipers that are curved to go around
obstructions, but no hits. Isn't that type also called calipers? All I
see are the straight sliding type.


--

 

[John Doe]

"Tom Del Rosso" wrote:

Trying to buy a set of calipers that are curved to go around
obstructions, but no hits. Isn't that type also called calipers?
All I see are the straight sliding type.

In case you didn't already know... There are also "micrometers" used
for tiny measurements. I actually haven't had one, but they look
like a C clamp?

My caliper is straight, with one side to measure outer diameter and
the other side to measure inner diameter.

Sometimes you can get an answer like that by asking in Amazon
reviews question area. You might try the metalworking group. Surely
some hobby group on the Internet would know, if you don't get a
sufficient answer here.

Another search method you probably know... Enter the terms in
Google's search engine, then click on "images".

 

[Rick C]

On Monday, January 13, 2020 at 1:48:09 AM UTC-5, Tom Del Rosso wrote:

Trying to buy a set of calipers that are curved to go around
obstructions, but no hits. Isn't that type also called calipers? All I
see are the straight sliding type.


--

I think you might be talking about the eggplant shaped thing with a screw and nut to adjust the arms?

https://images-na.ssl-images-amazon.com/images/I/317kq1L4cpL._SX466_.jpg

I believe they are used to transfer the measurement of irregularly shaped objects to a ruler or other measuring device rather than making a measurement themselves.

Search for outside calipers. There are also inside calipers.

--

Rick C.

- Get 1,000 miles of free Supercharging
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[Tom Del Rosso]

Rick C wrote:

On Monday, January 13, 2020 at 1:48:09 AM UTC-5, Tom Del Rosso wrote:
Trying to buy a set of calipers that are curved to go around
obstructions, but no hits. Isn't that type also called calipers?
All I see are the straight sliding type.


--

I think you might be talking about the eggplant shaped thing with a
screw and nut to adjust the arms?

https://images-na.ssl-images-amazon.com/images/I/317kq1L4cpL._SX466_.jpg

That's the thing.

I believe they are used to transfer the measurement of irregularly
shaped objects to a ruler or other measuring device rather than
making a measurement themselves.

Yes usually, but I think I've seen some that do rough measurement.


> Search for outside calipers. There are also inside calipers.

Thanks, that worked in google. I was searching in retailer sites.

 

I bought this caliper on Aliexpress just for fun


https://a.aliexpress.com/_nIXLh


Got it and measures very good (I had a good quality vernier as reference)

Amazing at that low cost

Cheers

Klaus

 

[Lasse Langwadt Christense]

tirsdag den 14. januar 2020 kl. 19.29.45 UTC+1 skrev klaus.k...@gmail.com:

I bought this caliper on Aliexpress just for fun


https://a.aliexpress.com/_nIXLh


Got it and measures very good (I had a good quality vernier as reference)

Amazing at that low cost

afaict the biggest issue people have with cheap calipers is that they don't
last very long on battery

it's not really a high precision instrument anyway, there's a reason they
are also called very-nears

 

klaus.kragelund@gmail.com wrote in
news:aec291b4-ac68-48eb-ba09-2f2c94a6d2e0@googlegroups.com:

I bought this caliper on Aliexpress just for fun


https://a.aliexpress.com/_nIXLh


Got it and measures very good (I had a good quality vernier as
reference)

Amazing at that low cost

Cheers

Klaus

Feed china your money?

Those on Amazon are only like $9.

How much was your shipping?

I do not trust China sites for online buying.

 

[amdx]

On 1/14/2020 1:20 PM, Lasse Langwadt Christensen wrote:

tirsdag den 14. januar 2020 kl. 19.29.45 UTC+1 skrev klaus.k...@gmail.com:
I bought this caliper on Aliexpress just for fun


https://a.aliexpress.com/_nIXLh


Got it and measures very good (I had a good quality vernier as reference)

Amazing at that low cost


afaict the biggest issue people have with cheap calipers is that they don't
last very long on battery

it's not really a high precision instrument anyway, there's a reason they
are also called very-nears

I saw this today on another group. The poster was complaining about
short battery life of Harbor Freight meters and bought this instead.

https://www.amazon.com/gp/product/B072KGHRML/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1

But I haven't got an answer about battery life on that unit from him
yet, it has only been a few hours.
The Aliexpress uses an LR44 rated 120mah and the Amazon one uses a
CR2032 Rated 235mah. And for whatever it means, The LR44 is 1.5V and the
CR2032 is 3V.
Mikek

 

amdx <nojunk@knology.net> wrote in news:qvlam3$9lm$1@dont-email.me:

On 1/14/2020 1:20 PM, Lasse Langwadt Christensen wrote:
tirsdag den 14. januar 2020 kl. 19.29.45 UTC+1 skrev
klaus.k...@gmail.com:
I bought this caliper on Aliexpress just for fun


https://a.aliexpress.com/_nIXLh


Got it and measures very good (I had a good quality vernier as
reference)

Amazing at that low cost


afaict the biggest issue people have with cheap calipers is that
they don't last very long on battery

it's not really a high precision instrument anyway, there's a
reason they are also called very-nears


I saw this today on another group. The poster was complaining
about
short battery life of Harbor Freight meters and bought this
instead.
https://www.amazon.com/gp/product/B072KGHRML/ref=ppx_yo_dt_b_asin_
title_o03_s00?ie=UTF8&psc=1


But I haven't got an answer about battery life on that unit from
him yet, it has only been a few hours.
The Aliexpress uses an LR44 rated 120mah and the Amazon one uses
a
CR2032 Rated 235mah. And for whatever it means, The LR44 is 1.5V
and the CR2032 is 3V.
Mikek

I place my calipers in their case when I am not using them. 5
seconds of my time to remove the battery and place it in its cutout
is zero cost. I am not bothered by the additional labor or lack or
ready access.

Another way is to make a thin film strip to place in the battery
pocket to "turn it off".

laptops, battery operated drills, keep their battery in. they are
made for it. the caliper folks simply want to take up less space or
cannot be bothered by installing a watchdog like those in small
weighing scales.

 

[Clifford Heath]

On 15/1/20 8:09 am, amdx wrote:

On 1/14/2020 1:20 PM, Lasse Langwadt Christensen wrote:
tirsdag den 14. januar 2020 kl. 19.29.45 UTC+1 skrev
klaus.k...@gmail.com:
I bought this caliper on Aliexpress just for fun


https://a.aliexpress.com/_nIXLh


Got it and measures very good (I had a good quality vernier as
reference)

Amazing at that low cost


afaict the biggest issue people have with cheap calipers is that they
don't
last very long on battery
it's not really a high precision instrument anyway, there's a reason they
are also called very-nears


 I saw this today on another group. The poster was complaining about
short battery life of Harbor Freight meters and bought this instead.
https://www.amazon.com/gp/product/B072KGHRML/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1



But I haven't got an answer about battery life on that unit from him
yet, it has only been a few hours.
 The Aliexpress uses an LR44 rated 120mah and the Amazon one uses a
CR2032 Rated 235mah. And for whatever it means, The LR44 is 1.5V and the
CR2032 is 3V.
                              Mikek

The problem with the cheap ones is that they don't really "turn off",
they just disable the display.

I had a couple, but they were always out of service, so I went and
bought a reputable brand. Only $40 and much less time wasted.

 

[Tom Del Rosso]

amdx wrote:

I saw this today on another group. The poster was complaining about
short battery life of Harbor Freight meters and bought this instead.
https://www.amazon.com/gp/product/B072KGHRML/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1


But I haven't got an answer about battery life on that unit from him
yet, it has only been a few hours.
The Aliexpress uses an LR44 rated 120mah and the Amazon one uses a
CR2032 Rated 235mah. And for whatever it means, The LR44 is 1.5V and
the CR2032 is 3V.

It's the same issue with digital meat thermometers. Mine lasted a few
months then I got one with a mechanical dial and never bothered changing
the battery in the other one. I'd prefer mechanical calipers too.

Also, you know they use various design tricks in digital watches to make
the battery last 10 years, and they don't use those tricks in other
devices, but thoughtless (ISTM) designers use watch batteries anyway.
If they made the housing a little bigger they could have used AAA or AA
batteries. That goes for calipers and meat thermometers too.

 

[Steve Wilson]

klaus.kragelund@gmail.com wrote:

I bought this caliper on Aliexpress just for fun

https://a.aliexpress.com/_nIXLh

Got it and measures very good (I had a good quality vernier as reference)

Amazing at that low cost

Cheers

Klaus

How long does the battery last? I have a bunch of different ones but they
drive me nuts since the battery runs out while they are sitting on the shelf.
Some are a real pain to replace the battery. We need a USB rechargeable one.

 

[dcaster@krl.org]

On Tuesday, January 14, 2020 at 4:09:29 PM UTC-5, amdx wrote:

On 1/14/2020 1:20 PM, Lasse Langwadt Christensen wrote:
tirsdag den 14. januar 2020 kl. 19.29.45 UTC+1 skrev klaus.k...@gmail.com:
I bought this caliper on Aliexpress just for fun


https://a.aliexpress.com/_nIXLh


Got it and measures very good (I had a good quality vernier as reference)

Amazing at that low cost


afaict the biggest issue people have with cheap calipers is that they don't
last very long on battery

it's not really a high precision instrument anyway, there's a reason they
are also called very-nears


I saw this today on another group. The poster was complaining about
short battery life of Harbor Freight meters and bought this instead.
https://www.amazon.com/gp/product/B072KGHRML/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1


But I haven't got an answer about battery life on that unit from him
yet, it has only been a few hours.
The Aliexpress uses an LR44 rated 120mah and the Amazon one uses a
CR2032 Rated 235mah. And for whatever it means, The LR44 is 1.5V and the
CR2032 is 3V.
Mikek

AliExpless also has sellers of ones that take CR2032 batteries. Finding a seller is kind of a task.

Dan

 

[Tom Del Rosso]

Clifford Heath wrote:

The problem with the cheap ones is that they don't really "turn off",
they just disable the display.

Like a switch would add so much to the price.

 

[Clifford Heath]

On 15/1/20 9:53 am, Tom Del Rosso wrote:

Clifford Heath wrote:

The problem with the cheap ones is that they don't really "turn off",
they just disable the display.

Like a switch would add so much to the price.

Oh, they have a switch. It just disables the display

 

[Tom Del Rosso]

Steve Wilson wrote:

How long does the battery last? I have a bunch of different ones but
they drive me nuts since the battery runs out while they are sitting
on the shelf. Some are a real pain to replace the battery. We need a
USB rechargeable one.

That would be good with a little double layer capacitor. Plug it in for
a second and use it for 20 minutes. No need for a lithium battery.
That would allow you to keep the inch/metric versatility that mechanical
units lack.

 

[Michael Terrell]

On Tuesday, January 14, 2020 at 5:30:24 PM UTC-5, Steve Wilson wrote:

klaus.kragelund@gmail.com wrote:

I bought this caliper on Aliexpress just for fun


https://a.aliexpress.com/_nIXLh


Got it and measures very good (I had a good quality vernier as reference)

Amazing at that low cost

Cheers

Klaus

How long does the battery last? I have a bunch of different ones but they
drive me nuts since the battery runs out while they are sitting on the shelf.
Some are a real pain to replace the battery. We need a USB rechargeable one.

Solar cells. You cant use them in the dark, anyway

 

[Rich S]

On Monday, January 13, 2020 at 6:48:09 AM UTC, Tom Del Rosso wrote:

Trying to buy a set of calipers that are curved to go around
obstructions, but no hits. Isn't that type also called calipers? All I
see are the straight sliding type.


--

*external* calipers?

 

Rich S <richsulinengineer@gmail.com> wrote in
news:0dd63e5d-11e9-4164-86f7-454843bba9d8@googlegroups.com:

On Monday, January 13, 2020 at 6:48:09 AM UTC, Tom Del Rosso
wrote:
Trying to buy a set of calipers that are curved to go around
obstructions, but no hits. Isn't that type also called calipers?
All I see are the straight sliding type.

*external* calipers?

Long jaw calipers. The beam will never be curved.

 

[three_jeeps]

I buy instruments for accuracy, repeatability, reliability and durability. Measurements can directly affect the quality of what is being designed and manufactured. I believe high quality calipers are worth the cost and have bought Mitutoyo and starret. Personally the cost of new is beyond what I can reasonably spend however there can be good finds on the used market.
To each their own