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  #16 (permalink)  
Old 11-15-2006, 09:49 AM
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Originally Posted by oldred
I feel comfortable using my $200.00 Starrett digital caliper but I would not feel so sure if I was using a $15.00 HF model. With the mechanical measuring tools there is not much of a problem with accuracy since they are based on a gear mechanism or precision threads but with the electronic gizmos, well I am not so sure.
Old guys like me need digital tools - we can't see the lines without a magnifying glass anymore - I had my Starrett .0001 mic out the other day - thousandths were kinda ok, ten thousandths, well, good thing I didn't need to go that fine. A magnifying glass is now with my measuring tools.

Dave

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Old 11-15-2006, 10:17 AM
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No doubt about it those digital outfits are easier to read, But, if they are lying to you. I still think the cheapo digital types should be used with caution.
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Old 11-15-2006, 10:30 AM
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I know those magnifying glasses are in all my toolboxes too

If i'm trying to read anything with a vernier scale all i can see anymore is a bunch of fuzzy lines that are as resolute as mud.
I don't like the digital stuff, no matter who makes it, ( I still like analog stereos and dash gauges too)
I depend on my dial calipers alot.

I just bought some magnifiers for my welding helmet.
it's all down hill from here, isn't it.

Mikey
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Old 11-15-2006, 10:49 AM
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Originally Posted by powerrodsmike
I know those magnifying glasses are in all my toolboxes too

I just bought some magnifiers for my welding helmet.
it's all down hill from here, isn't it.

Mikey
Mikey,
You have a few years to catch up with me, age wise, and from experience, the magnification level just keeps going up, the bones start to creak and you start to do something and forget why !!

Magnifiers for a welding helmet ?? - haven't seen them yet. Might be I should look into them - occasionally I get a bead that wanders off my mark.

Dave
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Old 11-15-2006, 11:45 AM
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I got an avatar now!!! WHOO-HOO!

Thanks Ireland for the heads up,
I can't wait.

Magnifying lense...


I think mine cost 7.00 at the welding supply house.

It sure helped. I have been tigging a bunch of .035" sheet metal lately with an .040" electrode and .032 rod. I can't hardly even see the rod on the table, much less the bead.

Them magnagogglers made me feel like a kid again. I seen things I haven't saw in years.

Now if I could see them without a mirror

Mikey
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Old 11-15-2006, 12:00 PM
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I got an avatar now!!! WHOO-HOO!

I think mine cost 7.00 at the welding supply house.
Mikey
Congrats on the AVATAR - looks good

Next time I get wire or gas I'll check on these specs.

Dave
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Old 11-15-2006, 12:51 PM
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Originally Posted by Irelands child
Congrats on the AVATAR - looks good



Dave
That's the powerrods "PUFF" as drawn by malc.
Thank you malc, sniff,sniff,
Mikey
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Old 01-05-2007, 08:19 PM
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I am going to dust off this thread a bit since I picked up a Harbor Freight digital caliper today and wanted to pass on what I found. While checking out with a saw blade I spotted these Cen-Tec composite digital calipers on sale for less than half their regular $19.95 price and I remembered this thread so I bought one. This thing is complete JUNK! it has a resolution (I did'nt look at the specs before buying it) of .01 and an accuracy of +/- .01, I did not miss any zeros that's .01! I guess that makes it at least as accurate as a good tape measure but I really can't think of much use for the darn thing with a tolerance range like that. I know this was a really cheap outfit and I did'nt expect much and in fact the only reason I bought it was because the question was asked about the quality so I decided to find out. I know they have better ones for more money but now I know about the cheapies, this one is headed for the trash.
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Old 01-06-2007, 12:15 AM
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Quote:
Originally Posted by oldred
I am going to dust off this thread a bit since I picked up a Harbor Freight digital caliper today and wanted to pass on what I found. While checking out with a saw blade I spotted these Cen-Tec composite digital calipers on sale for less than half their regular $19.95 price and I remembered this thread so I bought one. This thing is complete JUNK! it has a resolution (I did'nt look at the specs before buying it) of .01 and an accuracy of +/- .01, I did not miss any zeros that's .01! I guess that makes it at least as accurate as a good tape measure but I really can't think of much use for the darn thing with a tolerance range like that. I know this was a really cheap outfit and I did'nt expect much and in fact the only reason I bought it was because the question was asked about the quality so I decided to find out. I know they have better ones for more money but now I know about the cheapies, this one is headed for the trash.
Don't trash it! H-F will take it back give you a refund with in 30 days.

gcrmcc
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Old 01-06-2007, 08:37 AM
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I saw it the other day when I had to pick up a pipe expander. Almost bought it - glad I didn't. Thanks for making up my mind as I was going out 'wandering' today as it is about 65degrees now, too nice to do body filler work on my car. Might have stopped at HF. Still might, but....

Dave
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Old 01-06-2007, 02:37 PM
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Quote:
Originally Posted by oldred
I am going to dust off this thread a bit since I picked up a Harbor Freight digital caliper today and wanted to pass on what I found. While checking out with a saw blade I spotted these Cen-Tec composite digital calipers on sale for less than half their regular $19.95 price and I remembered this thread so I bought one. This thing is complete JUNK! it has a resolution (I did'nt look at the specs before buying it) of .01 and an accuracy of +/- .01, I did not miss any zeros that's .01! I guess that makes it at least as accurate as a good tape measure but I really can't think of much use for the darn thing with a tolerance range like that. I know this was a really cheap outfit and I did'nt expect much and in fact the only reason I bought it was because the question was asked about the quality so I decided to find out. I know they have better ones for more money but now I know about the cheapies, this one is headed for the trash.

http://www.harborfreight.com/cpi/cta...emnumber=47257
OLD RED, you should have bought this one. It says it's accurate down to .001. I have one and it reads right on the money.

Danny
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Old 01-06-2007, 07:52 PM
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I have a $200.00 Starrett so I really did'nt need one it's just that since the question came up here and the thing was dirt cheap (but still overpriced at any price IMO) I thought I would take it home and check it out. At a tolerance of +/- .01 what would anyone do with the darn thing? I mean if it will only get within 20 thousandths or so it will not be of much use around a machine or auto shop but I suppose that would be close enough for woodworking Next time I get over there I may pick up one of the better ones and try it out.
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  #28 (permalink)  
Old 01-07-2007, 05:26 AM
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Where I work and I have always been this way ever since I first started machining:

6-12 scale = for reference use only
Dial calipers / verniers = for reference use only
Dial indicator = for reference use. Always set gage blocks to the height and use those in conjunction with an indicator. You can get an indicator reading off just by the angle of the point to the indicator.

For precision checking use a good set of mics, depth mics, etc.
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Old 01-07-2007, 07:32 AM
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Quote:
Originally Posted by oldred
Those HF digital tools may very well be ok but it just seems to me that the chance of error is far greater than with a mechanical tool and besides is there really any advantage except for the gee-whiz factor?
Aside from the gee whiz factor...which is always important..with a digital caliper or Mic you can set it to the finish dimension of your work piece zero it out and then take your measurements like that. The reading on the caliper or Mic is how how far over you are. saves 15 seconds of calculator work. I'm not big on the digital ones either BTW.
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Old 01-07-2007, 08:05 AM
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This particular one don't even have much "Gee-Whiz", with only three digits and the decimal point in the wrong place Kevin is right about not using a caliper for really precise measuring but .01 is closer to a guess than a measurement.
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