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  #1  
Old 06-25-2018, 11:18 PM
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Default Digital Calipers Cheap

Found another deal on Amazon... $10 Bucks...



After buying two calipers from harbor freight over the last few years for more than this (15-20?), I'm going to give these a shot. Both of my HF ones crapped out, and at $10 bucks, I'm in for these.



Maybe better, but can't be worse! Either way, I need a new set.



https://www.amazon.com/gp/product/B0...9b8efc3a144580




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Old 06-30-2018, 05:49 PM
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Stop it! Lol.
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Old 07-01-2018, 11:52 AM
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Robert are you just trying to spend all our money
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Old 07-01-2018, 04:17 PM
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Let's play a game! Buy a super cheap set of flat feeler gauges and measure them with the super cheap calipers.

Then guess which one is wrong!
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Old 07-01-2018, 08:14 PM
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Quote:
Originally Posted by anickode View Post
Let's play a game! Buy a super cheap set of flat feeler gauges and measure them with the super cheap calipers.

Then guess which one is wrong!
What if the calipers say the same as the feeler gauges?
I'm going to see how close mine are.

$5 feeler gauges and $15 HF digital calipers.

0.035" ... 0.035"
0.116" ... 0.116"
0.060" ... 0.060"
0.021" ... 0.021"
0.043" ... 0.045"
0.041" ... 0.040"
0.016" ... 0.017"
0.008" ... 0.009"
0.004" ... 0.005"

Accuracy is good enough for me, let's look at precision.

0.043" ... 0.044"
0.043" ... 0.044"
0.043" ... 0.044"
0.043" ... 0.045"
0.043" ... 0.045"
0.043" ... 0.043"
0.043" ... 0.045"
0.043" ... 0.045"
0.043" ... 0.043"
0.043" ... 0.043"

Variance (σ2): 6.9000000000076E-7
Standard deviation (σ): 0.00083066238629226
Quartile deviation: 0.001
Mean absolute deviation (MAD): 0.00072


I have a different guess as to which one is wrong. LOL
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Old 07-02-2018, 03:54 AM
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Quote:
Originally Posted by bob58o View Post
What if the calipers say the same as the feeler gauges?
I'm going to see how close mine are.

$5 feeler gauges and $15 HF digital calipers.

0.035" ... 0.035"
0.116" ... 0.116"
0.060" ... 0.060"
0.021" ... 0.021"
0.043" ... 0.045"
0.041" ... 0.040"
0.016" ... 0.017"
0.008" ... 0.009"
0.004" ... 0.005"

Accuracy is good enough for me, let's look at precision.

0.043" ... 0.044"
0.043" ... 0.044"
0.043" ... 0.044"
0.043" ... 0.045"
0.043" ... 0.045"
0.043" ... 0.043"
0.043" ... 0.045"
0.043" ... 0.045"
0.043" ... 0.043"
0.043" ... 0.043"

Variance (σ2): 6.9000000000076E-7
Standard deviation (σ): 0.00083066238629226
Quartile deviation: 0.001
Mean absolute deviation (MAD): 0.00072


I have a different guess as to which one is wrong. LOL
Not bad at all! Can't really expect relaible accuracy down to the thousandth or less from a set of calipers anyway. That's what a micrometer is for.

Definitely deserves GAB status.

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Old 08-27-2018, 09:03 PM
WrenchnIsWhatIdo WrenchnIsWhatIdo is offline
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I grabbed thank you OP....W
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Old 08-27-2018, 09:38 PM
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My local tractor supply had these on sale for $5. Iíve had the ones from harbor freight and I honestly think this one is better ! Just doesnít have the manual readout numbers on it.
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Old 09-11-2018, 12:02 AM
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I got these for free. Seriously, they were just giving them away:



They measure in 0.00078" increments. Accuracy varies with weather.
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