BASIC DESIGN AND TECHNOLOGY

JUNIOR HIGH SCHOOL-ONE TOPIC CUTTING TOOLS UNDER WOODWORK DURATIO N 70 MINUTES

OBJECTIVES 1.State three cutting tools under woodwork 2.Describe the uses of saws, chisels and planes 3.Sketch firmer and mortise chisels

THE CUTTING TOOLS UNDER WOOD-WORK 1.SAWS 2.PLANES 3.CHISELS

Sawing is the process of cutting along and across the grain of timber SAWS Sawing is the process of cutting along and across the grain of timber TYPES OF SAWS RIP SAW It is used to cut along the grain of timber. It has a length of 700mm ,it has 4-6 teethper 25 mm Handle 700MM Teeth Blade

CROSS-CUT SAW Handle 600MM Teeth Blade It is used to cut across the grain of timber. It has a length of 600mm,it has 6-8 teeth per 25mm 600MM Handle Teeth Blade

TENON SAW It is used for cutting tenon.It has a length of 400mm,its teeth is 2-4mm per 25mm Handle Back Blade Teeth

PLANES Planning is the process of removing unwanted portion from the surface of timber TYPES SCRUBBING OR ROUGHING PLANE It is used to remove the dirt or rough surface of a timber Adjustable screw Lever cap Handle Front knob Body

It is used after the roughing plane to even the surface of the wood. JACK PLANE It is used after the roughing plane to even the surface of the wood. LEVER CAP ADJUSTABLE SCREW HANDLE FRONT KNOB BODY BLADE

It is used to smooth the surface of the wood SMOOTHING PLANE It is used to smooth the surface of the wood Blade

Chiseling is the process of removing waste from wood with a chisel CHISELS Chiseling is the process of removing waste from wood with a chisel TYPES FIRMER CHISEL It is used for cutting shallow grooves in timber or wood. Cutting edge Handle Ferrule Tang

It is used for cutting deep grooves in a wood or timber MORTISE CHISEL It is used for cutting deep grooves in a wood or timber MORTISE Handle Ferrule Tang Blade Mortise groove Cutting edge

1.Differentiate between ripping and cross- cutting EVALUATION 1.Differentiate between ripping and cross- cutting 2.Sketch and label the firmer chisel 3.Explain why the roughing plane is used before the jack plane

Abrantier theophilus:Klo-agogo L/A J.H.S MEMBERS Abrantier theophilus:Klo-agogo L/A J.H.S

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