☰ Contents · Technology

Bench, work place and a small chair

Lessons 3–4 · 2 lessons · Mehnat ta’limi (Texnologiya) – Labour Education (Technology), textbook for Grade 7 of general secondary schools. Ministry of Public Education of Uzbekistan. Sharq Publishing, Tashkent, 2016/2017 (authors not named in the extracted text)
3

Preparing hand tools and organising the work place

Textbook: pp. 18–20
GoalKnow the structure of the carpenter’s bench, how to get hand tools ready and how to arrange a safe work place.
New words
carpenter’s bench · duradgorlik dastgohivice · iskanjawork place · ish joyibacking board · ehtiyot taxtasi
Explanation

The carpenter’s bench holds wood firmly in the needed position. Its main part is a worktop on legs; the top has holes for fixing the work, and a recessed part holds tools. The vice has a screw mechanism: turning the screw brings the jaws together, loosening moves them apart. The bench height must suit the pupil’s height, otherwise the arm tires and tools slip. Do not over-tighten the vice because the wood gets crushed; protect the bench top from cutting, chopping and extra hammer blows, which is why a backing board is put under the work. Preparing a tool begins with checking that the handle is tight and the ring and blade are intact; a tool with a cracked or loose handle is not used. Sharpening a blade is done only by the teacher or a master, since a dull tool needs more force and slips and cuts. At the work place the tools are laid out conveniently with sharp ends turned away from the worker, there is nothing extra on the bench, and shavings are cleared with a brush, not by hand.

Worked examples
If the pupil is short, the bench height is adjusted or a footboard is used, so saw and chisel stay under control.
Over-tightening on a thin board leaves a crush mark, so a soft strip is placed between the jaws.
Class activity

Work place inspection: two pairs tidy one table (wood pieces, brush, measuring tools); partners then find hazards (a blade sticking out, a slippery floor). Faults are written in a table and then fixed. Do not touch a real tool without the teacher’s permission.

Practice
1
What is the main part of the carpenter’s bench?
2
What decides the bench height?
3
Which parts of a tool are checked before starting?
4
Why do we clear shavings with a brush, not the hand?