On 30/06/2012 10:15, Fred wrote:
> Does the group have any recommendations for a good spirit level, or
> any tales of bad spirit levels best to avoid?
Depend a bit on what you want to use them for... For example, my medium
sized level (approx 90 cm) I have found great for many tasks, but not
good for brickwork, because the vial is not as easy to see from the top
- being partially enclosed.
> I ask because some years ago, I bought a 4' level from Screwfix. It
> was a cheap, unbranded one. I have used it to put up shelves and
> radiators without problems but the other week, I was trying to install
> a door frame.
With any level it is worth checking from time to time. Draw a line on a
surface, then reverse and draw again - the lines should be parallel!
> The level said the wall was plumb, the frame was plumb, and the door
> was plumb. But the door would not close; it fouled against the frame.
> Standing back, I noticed that the wall (and thus the frame) were not
> truly vertical. I put a packer between the top of the frame and the
> wall, which bought the frame true and the door shut perfectly.
> I cannot understand why the level said the frame and wall were plumb
> when they were not. Is it that they are less accurate when used
> vertically than horizontal? Is it that unbranded ones are just less
It could be its always been out on the vertical vial, but since that
gets used less it has not been noticed.
Better levels are adjustable, cheap ones might be stuck wrong!
> I notice that branded ones say they are accurate to 0.5mm/m but
> unbranded ones keep quiet about their accuracy!
That's before they have been dropped and kicked about a bit as well.
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