The making of clocks in the classroom is very versatile. It provides a lot of scope, as it can be used in almost all subjects and tailored to most age and skill levels. Clock making develops the students’: imagination, research, design, planning and manufacturing skills, incorporating a variety of materials. Students can develop their own design or follow the teachers’ guidelines. An added bonus is that it is a cost effective unit of work which provides a useable end product. There are two main types of Clock Construction:
(1) the CLOCK MOVEMENT, with a choice of hands and numerals
(2) the INSERT CLOCK, where the complete clock is inserted into a hole from the front.
Hour and Minute Hands
Hour & minute hands must be ordered separately and are not included in the price of the movement. A second hand is included in the price of the hour & minute hands. See the chart below to find a second hand that suits your hour and minute hands.
Dimensions shown (mm) indicate the length of the hour and minute hand, from the centre of the holes. If the hands are too long, they can be trimmed with scissors. The hands have a protective film which should be peeled off.
NOTES: a. If the order does not specify an item number, H2140 will be supplied; if no colour is specified black will be sent.
b. The hour, minute and second hands are made to fit our clock movements and may not be suitable for other clock movements.
When ordering, state TYPE, FINISH and SIZE: If not specified, NUMA-15mm Black will be supplied. These are plastic numerals, approx. 1-1 ½ mm thick, with self-adhesive and a backing sheet. However, during storage, the adhesive on the back may deteriorate. If so, you can apply one of the commercially available adhesives, such as Selley’s “Supaglue” (Brush-on) or one of the spray on adhesives – eg. Fuller’s “Permanent Bond”.
Insert Clocks
Insert clocks are complete clocks – movement, hands, dial face with Roman numerals and front glass with bezel. – For these clocks you need to make a suitable clock housing which allows the clock to be inserted from the front.
Credited to: https://www.scorpiotechnology.com.au/
