Random Questions about Gage Blocks
Hi All,
I was lusting after a set of ceramic gage blocks, like these..
Swiss Quality Discount
But, aside from the fact that I can't really justify the expense, I'm wondering is ceramic is really that much better in actual usage..
If the gage block temperature co-oefficient is the same as the material being measured, then actual measurement temperature is less of an issue.
So, let's say the gage block is 10.000mm at 20 C, then if the gage block is at 30C it will measure 10.005, but if the thing I'm measuring is also at 30C doesn't that cancel the error?
Second question..
Anyone have thoughts about low cost gage block sets?
Brand New Set Metric 38PCS GAGE BLOCK RANGE 1.00 to 100mm STANDARD CERT.DIN861 | eBay
Seems to me that if I know the actual dimension at 20C ( and it's flat and square and wrings correctly) why should I pay 10 times the price...
I'm not keen on second hand gage blocks, not really sure why, maybe it's not knowing how they've been treated in the past, and most of the second hand sets I've seens seem to have bits missing.
I'm leaning towards the cheap set...
Regards
Ray