BASIC DESIGN AND TECHNOLOGY JUNIOR HIGH SCHOOLONE TOPIC

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

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 700 mm , it has 4 -6 teethper 25 mm Handle M 700 M Blade Teeth

CROSS-CUT SAW It is used to cut across the grain of timber. It has a length of 600 mm, it has 6 -8 teeth per 25 mm 6 Handle M M 00 Teeth Blade

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

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

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

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. Handle Ferrule Tang Cutting edge

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

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

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

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