Brochure
Extreme operating conditions test, on-road
Extreme operating conditions test, off-road
Test vehicle data:
Trailer: NBT, 3-axle bogie by BPW, (adapted for forklift)
Truck: Scania R380
Vehicle total weight: 45 000 kg
Tyres: Michelin
Rims: Michelin steel rims
Corner speed at test: 86 km/h
Track specifications:
Length of test track: 2850 m 71/320 /EEC
Curve radius: 160 m ECE R13/ R13H
Curve gradients: 5%, 30% and
60%
ECE R39
Maximum axle load: 15 000 kg ECE R78
Friction coefficient: 0,6μ
Longitudinal gradient: 0%
Test vehicle data:
Truck: MAN TGS 35.480
Power output: 600 bhp
Gears: 32 gears
Drive chain: 8-wheel drive with all axles lockable
On-road track testing was performed at RDW’s Test Center in Lelystad,
The Netherlands. The wheel joints of a 3-axle extended trailer were
secured with the Nord-Lock wheel nut marked in order to detect any
rotation. The truck was then driven in both directions on an oval track
with concave, banked curves in order to exert the same stress on all
wheel joints. The wheel nuts were not retightened after 100 km of
driving in order to simulate human error in combination with a worst
case driving scenario.
Result
There were no signs of wheel nut loosening. The Nord-Lock wheel
nut safely secured the wheel joints even under severe on-road
conditions.
Off-road track testing was performed by the 2009 European truck
trial champion. The wheel joints of a MAN TGS 8-wheeled truck
were secured and marked with the Nord-Lock wheel nut. The test
was performed in winter conditions in a stone quarry. Inspection of
the marked wheel nuts showed that they had not rotated. During
the tests, these maneuvers were performed to maximize the load on
the axles and wheel joints:
• Driving at accelerated speeds over uneven surfaces
• Entire vehicle weight was carried by: the rear axle only,
the front axle only, and each side
• Vehicle slid down the hill repeatedly
Result
There were no signs of wheel nut loosening. The Nord-Lock wheel
nut safely secured the wheel joints even under severe off-road
conditions.