Tolerance clearance interference lecture

this was from scribbed, i downloaded.

1. Measurement ChapterMeasurement Chapter
Bilateral and Unilateral ToleranceBilateral and Unilateral Tolerance
Clearance and Interference FitClearance and Interference Fit
Ó Southwest Wisconsin Technical College 2006

2. ToleranceTolerance
Bilateral ToleranceBilateral Tolerance
2.355” 2.355” ±± 0.005” 0.005”
2
.
3
5
5
”
2
.
3
5
0
”
2
.
3
6
0
”
0.005”
0.005”

3. ToleranceTolerance
UnilateralUnilateral
1.480”1.480”
+0.000”
-0.007”
1
.
4
8
0
”
1
.
4
7
3
”
0.007”

4. ToleranceTolerance
UnilateralUnilateral
12.85 mm12.85 mm
+0.01 mm
-0.00 mm
1
2
.
8
5

m
m
1
2
.
8
6
m
m
0.01 mm

5. Convert: Unilateral to BilateralConvert: Unilateral to Bilateral
1
.
2
9
5
”
1
.
2
8
5
”
0.010”
+0.000”
-0.010”
1.295”

6. 0.010”
Convert: Unilateral to BilateralConvert: Unilateral to Bilateral
1
.
2
9
0
”
1
.
2
8
5
”
Min.
1
.
2
9
5
”
Max.
0.005”
0.005”
+0.000”
-0.010”
1.295”1.290”± 0.005”

7. Convert Convert 2 of 22 of 2
Convert the unilateral tolerance to a bilateral Convert the unilateral tolerance to a bilateral
tolerance.tolerance.
4.885”4.885”
+0.004”
-0.000”
4
.
8
8
9
”
4
.
8
8
5
”
0.004”
Min. Max.
±

8. Measurement ChapterMeasurement Chapter
Clearance and Interference FitClearance and Interference Fit

9. Clearance FitClearance Fit
Total Clearance

10. Clearance FitClearance Fit
Total Clearance

11. Range of Clearance FitRange of Clearance Fit
Maximum ClearanceMaximum Clearance

12. Range of Clearance FitRange of Clearance Fit
Minimum ClearanceMinimum Clearance

13. Determine Clearance Determine Clearance 1 of 21 of 2
Determine the Determine the maximummaximum and and minimumminimum clearanceclearance..
A: 1.25” ± 0.03”
B: 1.18” ± 0.03”
Max A: _______
Min A: _______
Max B: _______
Min B: _______
1.28”
1.22”
1.21”
1.15”
Maximum Clearance = Largest Hole – Smallest Pin
Maximum Clearance = 1.28” – 1.15”= 0.13”

14. Determine Clearance Determine Clearance 1 of 21 of 2
Determine the Determine the maximummaximum and and minimumminimum clearanceclearance..
A: 1.25” ± 0.03”
B: 1.18” ± 0.03”
Max A: _______
Min A: _______
Max B: _______
Min B: _______
1.28”
1.22”
1.21”
1.15”
Minimum Clearance = Smallest Hole – Largest Pin
Minimum Clearance = 1.22” – 1.21”= 0.01”
= 0.13”

15. Determine Clearance Determine Clearance 2 of 2 2 of 2
A
B
2.0360” ± 0.0005”
2.0334” ± 0.0005”
Max A:_______ Min A: _______
Max B: _______ Min B: _______
2.0339” 2.0329”
2.0365” 2.0355”
Maximum Clearance = Largest B – Smallest A
Maximum Clearance = 2.0365” – 2.0329”= 0.0036”

16. Determine Clearance Determine Clearance 2 of 2 2 of 2
A
B
2.0360” ± 0.0005”
2.0334” ± 0.0005”
Max A:_______ Min A: _______
Max B: _______ Min B: _______
2.0339” 2.0329”
2.0365” 2.0355”
Minimum Clearance = Smallest B – Largest A
Minimum Clearance = 2.0355” – 2.0339”= 0.0016”
Max Clearance= 0.0036”

17. Interference FitInterference Fit
Total
Interference

18. Interference Fit Interference Fit 1 of 11 of 1
Determine the Determine the maximummaximum and and minimumminimum
interferenceinterference..
A
B
Diameter of Pin:
9.94 mm ± 0.03 mm
Diameter of Hole:
9.85 mm ± 0.03 mm
Max A:_______ Min A: _______
Max B: _______ Min B: _______
9.97 mm 9.91 mm
9.88 mm 9.82 mm
Maximum Interference
= Largest A – Smallest B
Maximum Interference
= 9.97 mm – 9.82 mm= 0.15 mm

19. Interference Fit Interference Fit 1 of 11 of 1
Determine the Determine the maximummaximum and and minimumminimum
interferenceinterference..
A
B
9.94 mm ± 0.03 mm
9.85 mm ± 0.03 mm
Max A:_______ Min A: _______
Max B: _______ Min B: _______
9.97 mm 9.91 mm
9.88 mm 9.82 mm
Minimum Interference
= Smallest A – Largest B
Minimum Interference
= 9.91 mm – 9.88 mm= 0.03 mm
= 0.15 mm

20. WorksheetWorksheet
Part I :Part I : Work with bilateral and unilateral Work with bilateral and unilateral
tolerance.tolerance.
Part II:Part II: Convert unilateral tolerance to bilateral Convert unilateral tolerance to bilateral
equivalent.equivalent.
Part III:Part III: Solve clearance and interference Solve clearance and interference
problems.problems.

21. The EndThe End
Written by Peter C. EsserWritten by Peter C. Esser
Southwest Wisconsin Technical CollegeSouthwest Wisconsin Technical College
ÓÓ2006 & 20072006 & 2007
[email protected]@swtc.edu