20
ACTUAL PULL FORCE READ DIRECT FROM GAUGE
50mm dia Disc Area 1964mm
2
Actual Pull Force 75mm dia Disc Area 4418mm
2
Bond Strength kN Bond Strength
MPA Mpa
0.51 1.00 0.23
1.01 2.00 0.45
1.53 3.00 0.68
2.03 4.00 0.90
2.55 5.00 1.13
3.05 6.00 1.36
3.56 7.00 1.59
4.07 8.00 1.81
4.58 9.00 2.04
5.09 10.00 2.26
5.06 11.00 2.49
6.11 12.00 2.72
6.62 13.00 2.94
7.13 14.00 3.16
7.63 15.00 3.40
8.15 16.00 3.62
8.66 17.00 3.85
9.16 18.00 4.07
9.67 19.00 4.30
10.20 20.00 4.52
10.70 21.00 4.98
11.71 23.00 5.20
12.22 24.00 5.43
12.73 25.00 5.65
Mpa (Mega Pascales) = N/mm squared
Mpa = Actual Pull Force divided by Area of Disc x 1000
MATERIAL BOND TESTER KIT continued..
IMPORTANT! A low reading will be obtained if:
• The pull-off tester is misaligned and not perpendicular to the specimen
• The specimen is misaligned and not perpendicular to the pull-off tester
• The bondline is not of uniform thickness (0.5mm)
• A sudden or erratic loading is applied.
Note: This information is for guidance only. Please also refer to adhesive manufacturer’s
data and safety sheets.
Replacement discs available in both sizes from stock.
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