SEK. MEN. TEKNIK TAWAU ENGINEERING TECHNOLOGY FORM 4 TOOLS KESEPADUAN ILMU TERAS KECEMERLANGAN
OBJECTIVES At the end of the lesson, student should be able: Explain the definition of Hacksaw. Recognized each part of Hacksaw. State functions of Hacksaw. Determine the appropriate way using a Hacksaw.
BASED ON THE VIDEO GIVEN, WHY THIS PROBLEMS OCCURRED? You have the blade in wrong. You are not using sharp blade The number of teeth is to low for the project. You are putting too much pressure on the saw. You don’t clamp the work. “Practice Make Perfect”
IDENTIFY EACH TOOLS
What is HACKSAW? Refer on:-
Engineering Drawing Form 4 Text Book
Used to cut a work piece into desire sizes.
Kamus DewanEdisi Empat
Do you need a hacksaw?
To cut metal
Electrical Tubing (conduit)
Plastic water pipe
Hacksaw Part Which the most commonly used handles?
How to properly & safety use a hacksaw
How to properly & safety use a hacksaw General Hand Protection When Using a Hacksaw General Eye Protection When Using a Hacksaw Holding the hacksaw Correctly Safety With Materials Cutting Effectively and Safely Safe Storage and Care of Hacksaws
Hacksaw Safety Tips Choose the correct blade for the material being cut. Secure the blade with the teeth pointing forward. 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. Clamp thin, flat pieces that require edge cutting. If you’re cutting pipe, always secure it in a vise before cutting.
Setting up the hacksaw to cut Step 1. Determine which blade you will use to cut the material. Step 2. Insert the blade so that the teeth are pointing forward. Step 3. Tighten the thumbscrew until u can’t turn it with your hand (Hand tight)
Hacksawing Method You should work in the vice so that as many teeth as possible are in contact with the surface. You should orientate the work so that you are cutting vertically toward the floor.
EXERCISE Soft Steel Task:- You need to redraw everything back. Determine :- Type of blade Pointing of saw blade Best position of work piece when u cutting it