BS ISO 3894:2015 pdf free
BS ISO 3894:2015 pdf free.Road vehicles一Wheels/rims for commercial vehicles一Test methods
The test machine shall be equipped with a means of imparting a constant radial load as the wheel rotates. There are many means of imparting radial loads: the suggested equipment incorporates a driven rotatable drum set which presents a smooth surface wider than the loaded test tyre section width. The recommended minimum external diameter of the drum is 1 700 mm.
The test wheel and tyre fixture shall provide loading normal to the drum external surface and in line radially with the centre of the test wheel and drum. The axes of the drum and test wheel shall be parallel (see Figure 3). For dual application wheel, it shall be tested as a single application.The mating surfaces of the test adaptor and wheel shall be free of excessive scoring and deformation,and excessive build-up of paint, dirt, or foreign matter.
Tyres used in this test shall meet the following:
一tyre which have load rating of maximum value in the tyres which are applied to the test wheel;
一tyre which is specified by the wheel manufacturer or the vehicle manufacturer. Select the tyre of maximum load rating if there is more than one tyre which are specified by the vehicle or wheel manufacturer.
The test bolts and wheel nuts used shall be
一equivalent to those used in a vehicle,
一in good condition, and
一lubricated or non-lubricated in accordance with the state of being applied to a vehicle (as specified by the vehicle manufacturer).
Tighten the wheel nuts to the torque limits specified by the vehicle or wheel manufacturer for stud size and type of nut used.
Check nut torque values and reset them periodically during the course of the test in order to compensate for the wearing-in of mating surfaces of nuts and bolt holes.
The test load and tyre inflation pressures are based on wheel ratings. Test inflation pressures are shown in Table 1.BS ISO 3894 pdf free download.
