Using tools which are unfamiliar to you such as an annular cutter could be downright dangerous if you have not taken the time to do some research and find out the correct method of using it.

1. INCORRECT USE OF A
METAL HOLE SAW
IS ASKING FOR TROUBLE

2. Table of Contents
Incorrect use of a metal hole saw
Page 3
is asking for trouble
Don't cut corners when using
Page 9
a metal hole saw

3. Incorrect use of a metal hole saw is asking for trouble Page 3
While it is a noble enterprise to
attempt to perform your own DIY
repairs in the home, it should be
remembered that larger tasks must not
be attempted and should instead be left
to professionals. This is because a
simple mistake could lead to a lot of
damage.
Using tools which are unfamiliar to
you such as an annular cutter could be
downright dangerous if you have not
taken the time to do some research and
find out the correct method of using it. A
poor DIY job could end up costing you
more in the long run as a professional is

4. Incorrect use of a metal hole saw is asking for trouble Page 4
eventually needed and must clean up
your mess before they proceed. This is
not to say that DIY jobs should not be
undertaken. If done correctly, they will
be as rewarding as anything you have
ever done.
Perhaps you are looking to install
something in the home but you need to
create a hole in the middle of a solid
surface. Those unused to DIY tasks may
consider this to be an impossible task
when it is in fact anything but.
A metal hole saw can be used for

5. Incorrect use of a metal hole saw is asking for trouble Page 5
this job but they should be used with
caution. It is possible to cut a perfect
hole in just about any surface thanks to
the range of saws available. For
example, if you believe that cutting a
hole in a concrete surface cannot be
done, think again. There is a concrete
hole saw specifically for this job.
In general, you are looking at two
distinct types of metal hole saw that are
regularly used. Blade tipped saws are
the most popular and glide through
metal and wooden surfaces like a knife

6. Incorrect use of a metal hole saw is asking for trouble Page 6
through butter. There are also saws that
come with diamond tipped edges and
these cut through solid surfaces at a
slightly faster rate than their blade
tipped counterparts. However, the
difference in price between them is so
vast that it is really not worth paying the
extra amount unless you are a
professional.
Although the metal hole saw may
seem like some exotic tool, it actually
does not vary from the a regular drill in
the way it works. The circular cap is just

7. Incorrect use of a metal hole saw is asking for trouble Page 7
a drill bit of a different shape which is
kept in place by a pilot bit. An arbor is
then used to attach the circular blade to
the drill. This ensures that the cutter
does not slide out of place and is safe to
use when cutting through surfaces.
Inexperienced DIY enthusiasts may
accidentally use the saw without either
the arbor or pilot bit which is
inadvisable. Using the saw without these
safety elements is likely to lead to
serious injury.

8. Incorrect use of a metal hole saw is asking for trouble Page 8
A metal hole saw is the ideal tool
for drilling into doorknobs to install
locks and is capable of cutting through
even the most durable metal. This type
of saw is an instrument that can be used
creatively in the right hands but could
cause damage to property and the person
holding it if used incorrectly.

9. Don't cut corners when using a metal hole saw Page 9
There are occasions such as trying
to bore a hole in a solid object which
causes people to ask for the assistance of
an expert. To them, it seems like such a
task is far beyond their capabilities.
What they don’t realize is that
equipment like a metal hole saw can be
used by just about anyone as long as
they carefully follow the instructions.
All of a sudden, seemingly impossible
tasks like cutting a hole in a doorknob to
install a lock are very achievable. These
saws are circular and allow even a DIY

10. Don't cut corners when using a metal hole saw Page 10
beginner to easily saw through solid
metal. If it is another material like
tubing that needs to be cut through, an
annular cutter can do the job without
causing the object to crack or dimple.
A metal hole saw is a metal
cylinder that is mounted onto an arbor. It
is possible to find saws that have
industrial diamonds instead of teeth but
usually, the cutting edge consists of
metal teeth which should make short
work of softer metals like brass or
bronze. Once you have cut through the

11. Don't cut corners when using a metal hole saw Page 11
first part of the metal, the centering
mechanism ceases to be in use though it
still prevents the saw from going too
deep. Hole saws usually have a
maximum diameter of five inches with
cylinder lengths of up to 12 inches not
uncommon.
Saws with metal teeth are usually
used for the majority of metals as well
as wood and plaster while saws with
diamond teeth can be used to deal with
concrete and glass.

12. Don't cut corners when using a metal hole saw Page 12
A metal hole saw is far more
efficient than regular drill bits because it
only has to cut a small amount of
material to create a large hole. This
means it requires less power and uses up
less electricity. It is also capable of
boring holes which are much wider than
what can be achieved by a drill bit.
However, in order to be effective, the
saw must be able to produce a huge
amount of torque at a relatively low
speed. It is easy to allow the saw to bind
because of excess dust and long

13. Don't cut corners when using a metal hole saw Page 13
side-handles must always be used as an
extreme kickback occasionally occurs
during use.
An annular cutter is preferable to
a twist drill when creating holes in pipes
and tubing because it is hollow and
therefore, has no ‘dead-zone’ resistance
which can cause twist drills to slow
down when in motion. Annular cutters
maintain their speed throughout which
ensures that a clean and crisp hole is
produced without dimples and burrs.
When using this type of cutter, it is

14. Don't cut corners when using a metal hole saw Page 14
important to maintain a constant feed
pressure. Allowing the feed rate to
remain slow could cause the cutter to
stall or even break.
When you use a tool like a hole saw
or annular cutter to create holes, you
have a machine with awesome power in
your hands. These machines enable you
to make large holes without damaging
any of the material surrounding the hole.
Simply follow proper safety procedure
and you will no longer need to call a
professional every time you need a hole
drilled..

15. Page 15
For more information
about annular cutter
and metal hole saw,
please check out
www.hermanscentral.com