Martin Carroll wrote:
About to start first fix electrics on the renovation project and was
wondering about buying a wall chaser to speed things up a bit (probably
neater too!).

House is a mixture of lightweight/concrete blocks in the extension and
brick in the original part.

Toolstation have an SDS atachment http://www.toolstation.com/index.html?
r=a&feature=52907&rr=R20m89054fXX4F9K&gclid=CI715o v545YCFQnmlAodW3dsOw
at £75

Screwfix seem to sell a number of different machines with this one
http://www.screwfix.com/prods/81200/...nders/Erbauer-
ERB125Y-125mm-Wall-Chaser at £99 the cheapest.

Anyone had any experience of using any of these care to comment.

Yup. Have you read:

http://wiki.diyfaq.org.uk/index.php?title=Wall_chaser

The SDS + chisel is a big stepup and improvement over manual chasing. If
you have a drill with a good bit position lock and a sensitive speed
controller you can also be quite neat. However this will create lots of
mess and a fair bit of airborne fine dust (not in the same league as an
angle grinder though!).

The chasers are however very clean (if your vacuum can keep up) and a
good deal faster still (a lightswitch drop in modern plaster would take
about 10 secs with a chaser for the initial cut, and then perhaps
another 30 sec to break out the fillet. With a SDS and chisel on its own
it would be several mins work).

The SDS gouges can be good - but work best in modern plasters. On older
stuff they have a habit of knocking off great swathes of top coat
adjacent to the chase.

I have the Sparky one:

http://www.machinemart.co.uk/shop/pr...ser-230v/path/

The design is a bit of a handful, but it does have the power to cut
fast, and the extraction port is well positioned to catch very nearly
all of the dust.


--
Cheers,

John.

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