☰ Contents · Technology

A small table and a wardrobe design

Lessons 5–6 · 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)
5

Making a small table

Textbook: pp. 24–27
GoalKnow the technology of making a small table and how to measure and join its parts.
New words
table top · stol doskasicompasses · sirkuldrawing · chizmajoint · birikma
Explanation

The main parts of a table are the table top and the legs. A table carries less load than a chair, so medium-hard wood or thick plywood is enough. We begin by tracing the template parts on plywood; for a round top, one leg of the compasses is placed at the centre and the circle is drawn with the needed radius. The radius is half the diameter. To fit the legs, small holes or slots are made in the top, sized to the leg thickness. When the top is cut along its circle with a fret saw, the plywood is clamped and goggles are worn. The cut parts are smoothed with abrasive paper: coarse first, then fine. Joints are fixed with PVA glue and the item is not moved until the glue has set. For the table to stand without wobbling on a flat surface, the legs must be equal in length; check this with a ruler and a try square. At the end it is lacquered or painted, working in a ventilated place away from flame, with an adult.

Worked examples
If the table top has a diameter of 12 cm, we open the compasses to a radius of 12 : 2 = 6 cm.
If one leg is 8 cm and the other 7.5 cm, the table tilts; the extra is sanded off to make them equal.
Class activity

Model: make a paper table model. Cut a circle for the top and two crossing strips for the legs (with scissors, carefully). Join the model, check whether it wobbles and write how to fix it.

Practice
1
A round top has a diameter of 14 cm. What is the compasses’ radius in cm?
2
Which hardness of wood is enough for a table?
3
If the table wobbles, what do you check first?
4
Why do we not move the item until the glue has dried?