…No point having a micrometer that is apparently less accurate than a digital caliper. Maybe if Lidl had bought them to sell at a £10 price point rather than £7 there might have been enough margin for a bit of manufacturer QC.
Nigel B.
I agree! Same thing applies to buying ebay ‘bargains’ in hope that an instrument of reputable make is still in good order. That’s a gamble. I say no micrometer is worth owning unless it’s proven to read accurately across the full range. Good makes with worn threads or a frame bent by being dropped are as rubbish as super-market bargains with manufacturing errors! Unless they’re collectables kept in a glass case and never used.
A few months ago my inexpensive 0.01mm micrometer had to be replaced after nearly 10 years and I was going to write up the post mortem with photos. Didn’t have time. Briefly:
Inside the fine thread and wear adjuster were nothing to boast about, but still working well enough. The problem was the very basic zero adjust arrangement. It failed by not reliably holding the fixed barrel on zero. The barrel sometimes moved up to about 0.005mm during measurements, and was getting worse. Might have been able to fettle it, but I decided not to risk working with an unreliable instrument.
When I need a micrometer, it has to be trustworthy. I periodically test my measuring gear, and am ruthless when they don’t perform adequately!
Dave