A hacksaw consists of a metal frame that secures a narrow, toothed blade. It can cut various materials like wood, metal, and plastic. The document discusses the parts of a hacksaw, different types of tooth patterns for cutting various materials, proper technique for using a hacksaw safely and effectively, potential difficulties that may arise, and hacksaw maintenance.

1. Language & Communication
Presentation :
How to use a hacksaw.
Prepared by : Md.Syadza Nurhafizh bin Sulaiman
DIP 1/MRE/C

2. What is hacksaw
How does a hacksaw looks like
Types of teeth
Tooth set
Safety precaution
Methods
Difficulties
Conclusion
Contents

3.  A hacksaw is the right tool for the job.
 Hacksaw is a manual saw that consists of a metal
frame for securing a narrow, toothed blade and can
be used for cutting wood, metal, plastic and other
materials.
Need to cut metal ?

4. How does a hacksaw looks like ?

5. 32 teeth per inch gives a finer cut and is good for cutting thin gauge
steel or thin-walled tubing, copper tubing or heating
duct.
24 teeth per inch used for medium steel and regular walled tubing.
also good for cutting angle iron, heavy pipe, brass
and copper.
18 teeth per inch used for hard metal iron pipe and large pieces of
steel.
14 teeth per inch work well with soft metals like aluminum and tin.
12 teeth per inch used for pipe, tubing, plastic, wood or high speed
steel.
Types of teeth

7. Tooth set
Regular/Straight
• These work
well on softer
metals.
• The teeth are
lined up
touching each
other and
alternation left
to right.
Raker
• Perfect for
cutting thick
metals.
• The teeth are
placed in sets
of three.
Wavy
• The right
choice for hard
,thin metals.
• The teeth are
set in a wave
pattern from
left to right for
a smooth, fine
cut.

11.  Choose the correct blade for the material being cut.
 Keep the blade rigid and the frame properly aligned.
 Cut using strong, steady strokes directed away from you.
 Use the entire length of the blade in each cutting stroke.
 Keep saw blades clean, and use light machine oil on the blade
to keep it from overheating and breaking.
 Cut harder materials more slowly than soft materials.
Safety Precautions :

13.  To really use a hacksaw well you need to clamp
your work.
 Grip the frame with both hands.
 As you push the blade (forward stroke) use your
left hand to guide the saw so that it cuts straight.
 DO NOT use your left hand to apply pressure,
just use it to guide your cut.
Ok, let’s cut a metal !

14.  When you get to the end of the forward
stroke, stop and pull the saw back with your
right hand.
 As you pull back don't apply any pressure with
your right hand.
 Move your body forward and back as you
cut, pressing on the forward stroke and easing
off on the return one.

15.  Repeat this until you saw all the way through
the workpiece.
 Don't stroke any faster than this because it will
create too much heat and again wear out the
blade prematurely.
 Wipe your saw clean after each use. Hang it up
high for safety reasons between uses.

16. They aren't
using a sharp
blade.
The number
of teeth is too
great for the
project.
They are
putting too
much
pressure on
the saw.
Difficulties when sawing metal

17.  Store blades in a dry place and apply a light coat of oil when
not in use.
 Replace damaged saw handles with new ones immediately
when needed.
 Always loosen the blade tension on a hacksaw when not in
use.
 Avoid placing heavy tools or objects on saw blades as
this can result in distortion of the blade.
Care of saws

18. Hacksaws are handy cutting tools that are
useful additions to a homeowner's toolbox or
small garage shops.
Replacement hack saw blades are available at
most hardware stores. Make sure you select
the appropriate blade as indicated by the
number of teeth per inch. Do not use a
thinner coping saw blade in a hacksaw.
Conclusion

19. THANK YOU FOR
YOUR TIME AND
ATTENTION