Digital calipers

[baron von greenback]

Do all digital callipers measure the .2 or like 31.6 or 27.2 and not just 31 or 27 the ones i looking at say plus or minus 0.02 would these do cheers

 

[PhillB]

Yeah, most do. If they say plus or minus 0.02 they will give you reading to two decimal places - like 31.62mm or 27.25mm

More than accurate enough for measuring tube diameters!

 

[baron von greenback]

Cheers mate thanks for help i pull the trigger on it then best of it is i measured everything i have and never realised about the .2 etc and my callipers were out by 1mm so i have to totaly remeasure everything couldnt work out why 2 of the seatpost i bought wouldnt fit what a knob haha

 

[Tootyred]

Buy analogue ones! Cheap digital are rubbish. Try opening them and closing them quickly and then measuring the same thing....you will 3 different measurements! Worse when they get a bit dirty and greasy.

If your paying £150+ for a pair probably fine, but a £20 manual pair will last you the rest of your life and your children's and theirs....without new batteries!

True, it depends on what size of stuff your measuring, so if its a cm or 2 tollerance your probably ok with cheap digital.

 

[Tootyred]

Ps if you want to measure seat tubes try a cheap set of bore gauges (£10), then you can measure inside the tube...not round the top where its been crimped by the bolt. That way madness lives!

 

[baron von greenback]

Thanks tootyred ye i thought they wouldnt be the best and might not last the cause but thats worse than i thought probaly just get a normal set now then its the .2 etc that you need to get right you wouldnt think it would make that much of a diffrence but it does especialy on seatpost

 

[Monkeeee01]

I got a cheap pair of digital ones on Amazon and they do the job perfectly

 

[elite504]

If your paying £150+ for a pair probably fine, but a £20 manual pair will last you the rest of your life and your children's and theirs....without new batteries!

You're right, something like a Mitutoyo will give you a proper and accurate caliper. +/- 0.02 as per the instructions but in reality, normally within 0.01 on a slip gauge.
Totally get what you say re a regular vernier caliper, but if you've not had the schooling, verniers are not the easiest to read.
For those using cheap digital calipers, bear in mind they get wiggy when the battery gets low. Make sure you check it on a known diameter, before you make expensive purchases based on your readings!