ISO 15172:2005

INTERNATIONAL ISO
STANDARD 15172
First edition
2005-07-01
Road vehicles — Wheels — Nut seat
strength tests
Véhicules routiers — Roues — Essai de résistance des sièges d'écrou

Reference number
©
ISO 2005
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Foreword
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ISO 15172 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 19, Wheels.
INTERNATIONAL STANDARD ISO 15172:2005(E)

Road vehicles — Wheels — Nut seat strength tests
1 Scope
This International Standard specifies a test method to evaluate the strength of the nut seat of wheels intended
for use on passenger cars, light trucks and multi-purpose vehicles. While this test ensures the minimum
strength of the nut seat, the wheel must also have a degree of flexibility to allow torque retention. This test
evaluates the axial strength of the nut seat. In addition, the informative annex provides recommended bearing
area to ensure enough strength for the rotational force in tightening a nut against the nut seat.
2 Test procedures
2.1 General
The principle of this test is to apply an axial load to the nut seat and determine permanent deformation of the
nut seat. An additional test to measure yield strength is also specified.
2.2 Wheels for test
Use only fully processed wheels including all coatings representative of production parts intended for the
vehicle.
2.3 Test equipment
The test equipment shall be capable of supporting the complete wheel mounting area with a rigid flat surface
which is dimensionally representative of the vehicle hub (see Figure 1). The equipment shall provide a
hardened (R 45 min) punch or load applicator with a shape designed to match the seat face and the fastener
c
contact area representative of that specified for the wheel. The punch or load applicator shall provide a
me
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