syil sx3 vs tormach pcnc 1100

[in2steam]

looks like this would almost be better done on a lathe, just my 2 cents.

chris

[bucont]

Originally Posted by bucont I am just wondering what you use to measure a hole tolerance like this?

Anyone?

[in2steam]

Easiest would be ground pins in a go- no go setup, otherwise really good mic's and or height gauges.

chris

[ataxy]

yeah i would go with the go no go solution

[307startup]

Just from my experience, regardless of machine type, there is variability in sizes of drills and reamers from the manufacturers...a .5" drill can easily be .498" and still be "good". Reamers may be +/- .0005. So holding a tenth on hole size will still be a crapshoot. And that is buying A1 quality tooling, unless you go for mega-bucks medical supplier tools.

[DareBee]

The best way to measure those holes and be truly accurate to .0001 is with bore gauges and setup masters (this is completely ignoring all environmental variables as well).
Quality gauges taht are certified this accurate will cost MANY MANY thousands of dollars.

As far are processing these to size with YOUR setup, I would bore them really close undersize (.0001 - .0005) and hone or lap them to finished size.
These holes would be easiest to size in a lathe, but setup would be a lot of work.

Otherwise - get a jig grinder.

[SyilAmerica]

A hot or cold day will throw that tolerance off.

[fast89]

hot or cold day, hehehe, 10* change can screw that tolerance.

[in2steam]

Originally Posted by fast89 hot or cold day, hehehe, 10* change can screw that tolerance.

material dependant, it may toss that into a another ball park.

chris