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Magnetic Indicator Holder

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PekkaNF:
Hello all,

I have had one no brand very basic dial indicator holder for 18 years and it's pretty much ok. Not the smoothes and most rigid, but perfectly adequate. Until now.

Fine adjustment has started to act up, it's a little more rough than before and cleaning did not really improve it.

My friend helped mit ot measure my mill and he gloated with two very smooth mechanical centre lock/adjustment hi-tech-toy. I had used them before at the work, but thought they were really for rich kids or professionals.

Got flu and desided to cure it with new tools. I bough one new Vogel- brand (says Germany and all in it's burlap) and first one had a skewed base. Ok, they replaced it. I was using the new one and I was surprided to find fine tuning rough and harder than the old one!

And I'm using the standard 0,01 mm resolution clock, not the 0,001 mm one!

I was pretty disaponted, I disassembled the fine tuning and it had play everywhere and the build was susch that the play acted up not only against the spring, but also sideways and allows tiltting....making a whopping 0,05 mm uncertainty, depending which way measurement forces act on it. Moving surfaces are really rough and play everywhere.

http://shop.vogel-germany.de/Measuring-Stands--Roundnesses--Marking-and-Height-Gauges/Measuring-Stands/Accessories-217/Magnetic-Measuring-Stands/Magnetic-Measuring-Stand--400-mm.html?XTCsid=d0875cd3020bb002177ef2b303bb4a5d

Product No.: 255001

Could be just me having a bad luck, but twice on same product.

So, 60 EUR does not buy more that chinese poor quality, no matter what it says. Is there really anything under 100€ that would do, or am I better of buying traditional one, brand name?

Pekka

vtsteam:
I'm thinking it is Chinese:

http://www.alibaba.com/product-detail/Magnetic-Dial-Stand-Holder_51257680.html?spm=a2700.7724838.35.1.QgH1Lp

PekkaNF:
I agree....probably this one too:
http://www.machine-dro.co.uk/baty-hydraulic-magnetic-base.html

Starret + Moore and Wright seems to gone chinese as well.

I don't want to shell out over 200€ for Mitutoyo MIT 7033B. Just can't bring myself to do that.

On the other hand....I'm not spending any more on Indin or Chinese, not matter how cheap. And I specially hate to get ripped off on european/US brand.

I was looking some other stuff on this brand, because local shop has this brand, but I can't buy it, because they don't clearly state the quality of the stuff...

Need straight edge and all sorts of stuff. I was allready having hots for this kind of stand, it would simplify my life:
http://shop.vogel-germany.de/Measuring-Stands--Roundnesses--Marking-and-Height-Gauges/Measuring-Stands/Accessories-217/Cast-Iron-Bases/

Now I have to find honest chinese one, that I know is semi ready and cheap or real tool, but then I really need it.

Pekka

vtsteam:
Pekka, couldn't you make/mod something really to your taste?

PekkaNF:

--- Quote from: vtsteam on August 29, 2015, 09:40:15 PM ---Pekka, couldn't you make/mod something really to your taste?

--- End quote ---

Yeah. I could.

I was just in the middle of making that hydraulic press/broaching tool (Which I need for my next two project) when I noticed that my milling machine reached the limit I could not hold decent standard. Parts were not turning out straight square anymore. I got one 0,1 mm taper on 300 mm long piece, could not beleive it and repeated - yup ways are that worn out.

So. I'm a little reluctant to get sidetracked on someting else, unless it is pretty close to the same path that gets my mill fixed. It is still sitting there, gibs loose but othervise functional. I'm wondering what do I need to do with it before I move it one metre sideways to allow dissassemly of the table.

Then again, I could try out scraping and make one small grinding spindle that I can mount half decent linear rails to hog out 0,1 - 0,2 mm of material to get past wear.

Tried to fix the play on fine adjustment of the stand. I can't make it smooth with the parts I have. Placing the 0,05 mm shim on both sides of rough/loose member removed some of the play, but the shaft is loose and allows tiltting, because it is perpenticular to the spring and exactly on the middle to make it inherently unstable. This tilting introduces close to 0,05 mm of indicated play on measurement.

My first instict was to clean/epoxy the joint, but the locking system is not smooth eneough to snug the clock on right reading....This needs fine tuning.

Suggestions of the mechanism to copy? Sandwitch between magnet base and arm?

Pekka

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