← 2.2 Measuring and marking out tools
Using a steel rule accurately
Metal Technology · Grade 10 · about 40 minutes
How to place, sight and read a steel rule so parallax and a worn end do not steal millimetres.
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- 9 sections of explanation, worked examples and diagrams
- 1 practice task with hints and worked answers
- A quiz that marks itself as you go
- Your progress kept across every subject you take
Other lessons in this sub-strand
- Measuring and marking-out tools
- Why marking out matters
- The steel rule
- Using a steel rule accurately
- Outside calipers
- Inside calipers
- The scriber
- The try square
- Marking and testing square
- The dot punch
- The centre punch
- The divider
- The odd-leg caliper
- The trammel
- The surface table
- The scribing block
- Vee-block and angle blocks
- A marking-out task
- Maintaining marking-out tools
- Accuracy habits in marking out