In article ,
Broadback writes:
"George" wrote in message
ups.com...
So, my question is, are these as filthy as an angle grinder or can I

Exactly twice as filthy -- imagine using an angle grinder in each hand;-)

That is certainly true of Dyson, useless for DIY cleaning, filters clog
almost immediately with plaster and cement dust. As regards chasing I

This is rubbish. A Dyson is the only domestic cleaner I've found
which comes close to handling the dust output of a plaster chaser.
I can get 3-4 cylinder fulls of fine plaster dust before the filter
needs washing. (The post-motor filter has never needed changing.)
This is a 6 year old DC04 which has been used for building work all its
life (wasn't bought for it, but worked much better than one that was).
If you are going to use a Dyson for this, get a spare filter so you
can pop it when whilst the other one is drying out. However, beware
of a couple of things:- the dust will sand-blast the inside of the
clear dust cylinder, so it won't be clear anymore, and when emptying,
note that a cylinder full of plaster dust weighs more than the handle
on the cylinder is designed for (no I haven't broken it, but I suspect
I came close on one occasion). Other than that, it works great.

A Henry worked for about 1 minute until it had got too clogged,
which to be fair, is some 4 times longer than any other bagged
vacuum cleaner. However, a Henry has significantly less suck than
a Dyson, which means even for the short period it did work, there
was still loads of dust spewing out from the sides of the chaser.

use an SDS with chisel, if I want a particularly "tidy" chase I drill a
series of holes along the course of the chase before chiselling.

Wall Chasers make very tidy chases, although that's not necessarily
a good thing. When making good afterwards, your eyes are very good at
picking out any evidence of the straight edges which might show in
the final decorations, whereas a rough edge will not be as noticable.
If you are inserting oval trunking into the chase, cut freehand to
a line -- the natural undulations in your freehand cut will grip the
trunking until it's plastered in. I did once tack a piece of wood up
the wall to act as a guide, and the oval trunking kept falling out of
the perfectly straight chase;-)

--
Andrew Gabriel