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| mattinker:
Pk, I'm glad it's useful! the "flexion" is 1.35mm. unlike the Rahn version, I drilled and reamed a hole for the flexion. I built mine without known dimensions, so I finished up with one that is a little on the long side which means that it is a little more sensitive! the standard Imperial one is 5" from middle feet to measuring foot but there is a metric version which is 100mm. I used cold rolled for the base plate (I had it!), but hot rolled would be fine. Regards, Matthew |
| PekkaNF:
Thank you very much. I was eyeballing and estimating the Rahn version, but based on my past experience I very much prefer drilled/reamed hole to terminate such a cut. I'm drawing parts based on 100+100 spacing. Bit torn between ballbearing balls pressed on tight holes (I have a fitting drill) or going trough unused circular inserts for lathe/mill. I have proper screws, drills/taps. Might be easier that way. I have very nice Mitutoyo 2109S-10 0,001 mm resolution indicator, but reading is a bit tight and i doubt that this would benefit that much linearity....very tempted to use cheap 0,001 mm resolution dial on this one. Hope that this flu does not get worse. This might be just the right weekend project. HRS is 20*50 mm and then I have some 5*50 mm for spacers. Can't find any 10(or 12) mm *50 mm for DTI arm and other parts, should hit junkyard, but it is closing early today. Pekka |
| mattinker:
Pekka, I have found reasonable 0.001mm indicators on eBay, I suspect that people don't notice the extra "0", they usually go for the same price as the .01mm, between €14 and €18 without shipping! Regards, Matthew |
| PekkaNF:
Good to know. However many does not ship here. Bu not a bigie, because I have one cheap extra that is close to same size than the Mitutoyo. I tried to read your answer carefully, I got the impression that I could try a tad thicker flexion that 1,35 mm you had? Thank you, Pekka |
| mattinker:
Pekka 1.35mm seemed on the thick side to me, but it worked well. I think it's important to remember it's in the flexible range of the metal. The two limiting bars on the side are intended to keep the flexion in the limits of flexibility, mine are a bit slack, but it isn't a worrying amount of movement. The actual movement that I've found on my surface-plate is less than 0.01mm, so you can really limit the movement! regards, Matthew |
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