1. 6-Aug-15Created by Mr. Lafferty Maths Dept. Tolerance Tolerance Notation www.mathsrevision.com S4 Tolerance

2. 6-Aug-15Created by Mr. Lafferty Maths Dept. Starter Questions Starter Questions www.mathsrevision.com S4

3. 6-Aug-15Created by Mr. Lafferty Maths Dept. www.mathsrevision.com Learning Intention Success Criteria 1.Understand the term Tolerance.. 1. To explain what Tolerance is. 2.Calculate and simplify basic Tolerances. S4 Tolerance

4. 6-Aug-15 www.mathsrevision.com When a builder orders steel bolts to help to a house, he would like them to be 50 millimetres long EXACTLY. This is not always possible so the builder allows a ‘little error’ either side of this. Tolerance

5. S4 6-Aug-15 www.mathsrevision.com He might be prepared to accept any bolt as long as it lies between 48mm and 52mm This means he will accept a bolt which is within 2mm of the 50mm he asked for. Tolerance This is referred to as the TOLERANCE for the measurement. Tolerance is written as (50±2)mm

6. S4 6-Aug-15Created by Mr. Lafferty Maths Dept. Now try Ex 1 Ch16 (page 178) www.mathsrevision.com Tolerance

7. 6-Aug-15Created by Mr. Lafferty Maths Dept. Starter Questions Starter Questions www.mathsrevision.com S4

8. 6-Aug-15Created by Mr. Lafferty Maths Dept. www.mathsrevision.com Learning Intention Success Criteria 1.Write tolerances in standard notation. 1.To explain how write tolerances in standard notation. S4 Tolerance Tolerance Notation

9. S4 6-Aug-15Created by Mr. Lafferty Maths Dept. www.mathsrevision.com Example : An acceptable size of apples on sale at Asda must have a diameter between 8cm and 12cm. Write the tolerance level in standard notation. Calculate the middle value 2 8 + 12 Tolerance Tolerance Notation = 10 Tolerance is written as (10±2)cm

10. S4 6-Aug-15Created by Mr. Lafferty Maths Dept. www.mathsrevision.com Example : For safety reasons an acceptable rivet joint for an aeroplane joint must be between 19.9mm and 20.1mm in diameter. Write the tolerance level in standard notation. Calculate the middle value 2 19.9 + 20.1 Tolerance Tolerance Notation = 20 Tolerance is written as (20±0.1)mm

11. S4 6-Aug-15Created by Mr. Lafferty Maths Dept. Now try Ex 2 Ch16 (page 180) www.mathsrevision.com Tolerance Tolerance Notation