mtigges@NOSPAM.SHAW.CA on sun 5 mar 06
I'm further along in my kiln building project. But, I have a question
for all of those who might have come before me.
Today I roughed out the floor bricks. The next step is to mortar
them. After the mortar has cured I will grind the floor into a
circle.
Here are my question(s):
1. How best to cut the floor into a circle?
I will either use a sander or a circular saw. I have a masonary disk
I can put in the saw, it shouldn't be too hard, but I'll have to do it
in two passes, once from above, and once from below. The sander would
produce A LOT more dust. Perhaps the best is a combination of the
two?
In order to answer #1 it might help to look at my work thus far.
http://www.m2crafts.ca/kiln.html
2. I am using super-3000 mortar. It says that it needs to cure at
room temp for 24 hours. It is somewhat inconvienient for me to do
this inside, so, will it still cure at 5-10 celcius? (FYI 20 C is
room temperature.) If so how long will it take?
Thanks to any who can offer any advice!
What have I learned so far? Perhaps building a square kiln might have
been a better idea. A square kiln suffers the following drawbacks,
elements need to be pinned, it is not self tensioning, needs a much
more involved frame/case. But, it needs a very minimum of brick
cutting. I knew there would be dust, and I was prepared to deal with
it, but the amount of dust created is beyond what I suspected.
Nevertheless the exercise has so far been very worth it.
Mark.
Dave Finkelnburg on sun 5 mar 06
Mark,
I would not use either power tool you suggest for
this job. You can do quite well with a hard brick,
the unglazed back of a tile, or even a silicon-carbide
stone used to grind drips off kiln shelves. There
will still be dust...just not as much...and you'll
have more control over the job.
A "keyhole" type saw used to cut sheet rock
(gypsum wall board) has been a good tool for me to cut
insulating brick quickly and cleanly. The saws are
generally stainless steel so they hold up for a while,
are relatively cheap, and have coarse teeth so they
cut quickly.
Good building,
Dave Finkelnburg
--- mtigges@NOSPAM.SHAW.CA wrote:
> I'm further along in my kiln building project. But,
> I have a question
> for all of those who might have come before me.
> Today I roughed out the floor bricks. The next step
> is to mortar them. After the mortar has cured I
will grind the
> floor into a circle.
> 1. How best to cut the floor into a circle?
__________________________________________________
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Michael Wendt on mon 6 mar 06
Mark,
I used a skil saw with a carbide tipped
blade. Reduce the speed to a minimum
with a router speed control. I got mine
from Harbor Freight for $12.49. The
lower speed creates far less dust. Lay
the pattern on top the base course.
Use a Sharpie or pencil to mark the
facets (no need to be round if the kiln
is faceted). Make the saw cuts freehand
unless you prefer to clamp a straightedge
to them. You may then finish the cuts
with an old ordinary hand saw and block
sand the mismatch areas with 30 grit
sand paper. The skil saw offers more
than just speed. It keeps the cuts square
to the surface.
As to the mortar, it will cure fine but take
a little longer. When in doubt, mortar
several sets of scraps together and use
them as a reference check. At intervals,
try to separate them and when they hold,
you are ready to proceed.
Regards,
Michael Wendt
Wendt Pottery
2729 Clearwater Ave
Lewiston, Idaho 83501
USA
wendtpot@lewiston.com
www.wendtpottery.com
Mark wrote:
Today I roughed out the floor bricks. The next step is
to mortar
them. After the mortar has cured I will grind the
floor into a
circle.
Here are my question(s):
1. How best to cut the floor into a circle?
I will either use a sander or a circular saw. I have a
masonary disk
I can put in the saw, it shouldn't be too hard, but
I'll have to do it
in two passes, once from above, and once from below.
The sander would
produce A LOT more dust. Perhaps the best is a
combination of the
two?
...
...
Nevertheless the exercise has so far been very worth
it.
Mark.
Stephen Mills on tue 7 mar 06
I have made several replacement lids for drum shaped kilns.
In the UK they come as standard with a small vent in the centre, so I
use a hand held jigsaw with an extra long blade, attached to a wooden
pole with a peg on the end that fits the hole in the middle. Cuts a nice
circle.
A variation on that using a *blind* hole should do the trick.
Steve
Bath
UK
In message , mtigges@NOSPAM.SHAW.CA writes
>I'm further along in my kiln building project. But, I have a question
>for all of those who might have come before me.
>
>Today I roughed out the floor bricks. The next step is to mortar
>them. After the mortar has cured I will grind the floor into a
>circle.
>
>Here are my question(s):
>
>1. How best to cut the floor into a circle?
>
>I will either use a sander or a circular saw. I have a masonary disk
>I can put in the saw, it shouldn't be too hard, but I'll have to do it
>in two passes, once from above, and once from below. The sander would
>produce A LOT more dust. Perhaps the best is a combination of the
>two?
>
>In order to answer #1 it might help to look at my work thus far.
>http://www.m2crafts.ca/kiln.html
>
>2. I am using super-3000 mortar. It says that it needs to cure at
>room temp for 24 hours. It is somewhat inconvienient for me to do
>this inside, so, will it still cure at 5-10 celcius? (FYI 20 C is
>room temperature.) If so how long will it take?
>
>
>Thanks to any who can offer any advice!
>
>
>What have I learned so far? Perhaps building a square kiln might have
>been a better idea. A square kiln suffers the following drawbacks,
>elements need to be pinned, it is not self tensioning, needs a much
>more involved frame/case. But, it needs a very minimum of brick
>cutting. I knew there would be dust, and I was prepared to deal with
>it, but the amount of dust created is beyond what I suspected.
>
>Nevertheless the exercise has so far been very worth it.
>
>Mark.
--
Steve Mills
Bath
UK
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