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JSS1: BASIC TECHNOLOGY - 3RD TERM

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  1. Wood Work Hand Tools | Week 1
    4 Topics
    |
    1 Quiz
  2. Wood Work Hand Tools (Continued) | Week 2
    4 Topics
    |
    1 Quiz
  3. Care And Maintenance of Wood Work Hand Tools | Week 3
    2 Topics
    |
    1 Quiz
  4. Metal Work Hand Tools | Week 4
    4 Topics
    |
    1 Quiz
  5. Metal Work Hand Tools (Continued) | Week 5
    1 Topic
    |
    1 Quiz
  6. Care and Maintenance of Metal Work Hand Tools | Week 6 & 7
    2 Topics
    |
    1 Quiz
  7. Maintenance of Tool Or Machines and Importance of Maintenance | Week 8, 9 & 10
    6 Topics
    |
    1 Quiz



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In woodwork, cutting tools are saws.

Saws:

Saws are toothed metal tools used for cutting wood to measured sizes.

saw

Types of Saws:

a. Straight Line Cutting Saws:

These are saws used for cutting along or across grains of wood. Below are some examples;

i. Rip Saw:

This is a long, broad saw used for cutting used to make straight cuts in lumber along (in the direction of) the grain of the wood.

Rip saw
rip cut cutting along the grain
cutting along the grain
Rip saw is used in cutting in the direction of the grain.

The saw has teeth that are in a straight line so it does not drift with the grain of the wood.

Rip Saw e1604332140115
Rip Saw.

ii. Cross-cut Saw:

This is a saw used to cut timber across the grain (i.e., perpendicular to the grain) of the wood, in other words, they are used for making straight cuts across the grain in wood.

straight cuts
Making straight cuts across the grain.

They have thick and large blades while the teeth are large which enables them to cut trees and large limbs.

Crosscut Saw
Cross-cut saw.
cros cut vs rip cut
Cross-cut vs. Rip cut.

iii. Panel Saw:

It is used for cutting smaller, fine pieces of timber like panels. Panel saws can be vertical or horizontal. While Vertical Saws are smaller, horizontal machines are typically large table saws with a sliding feed table that pushes the material through the blade.

panel saw cutting
Panel Saw Cutting.

b. Back Saws:

These are saws with brass metals on their backs for reinforcement. They have fine teeth and narrow blades, making them suitable for making exact cuts.

back saw
Back saw.

Back saws include the following;

i. Tenon Saw:

It is used for cutting shoulders, tenons and joints. The blade is usually thicker.

tenon saw
Tenon saw.

ii. Dovetail Saw:

It is a saw used for cutting dovetail joints and smaller fine cuts.

dovetail back saw
Dovetail saw.

c. Curve Cutting Saws:

These saws are used for cutting difficult curves on wood.

Examples include;

i. Coping Saw:

This saw is suitable for cutting curves in woodwork. It has a metal frame and a wooden handle. They come in different sizes

Coping Saw
Coping Saw.

ii. Bow Saw:

It is used for cutting almost any shape of a circular curve. It has an H shape

Bow Saw
Bow Saw.

iii. Fret Saw:

It is a saw designed to cut any complex shape of curves in veneer sand thin layers of wood. Artists make use of this type of saw. This is a saw used for cutting very small holes of different shapes into wood-like keyholes.

Fretsaw
Fretsaw.

d. Hack Saw:

The hacksaw is one of the most common tools that are used for cutting metal in a workshop. It could also be used as a multi-purpose saw for cutting through wood.

Hack Saw
Hack Saw.

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