DYNOMOMETER PERFORMANCE TEST
Friction coefficient and brake momentum/acceleration under variable speed, pressure and temperature conditions are measured with a computer based simulation which reflects on-road conditions of vehicles.
DYNOMOMETER NOISE TEST
Spring-damper group are mounted to test device to record noise levels and frequencies under variable performance conditions.
DYNOMOMETER WEAR TEST
Under different temperature and performance conditions according to the standards, wear of brake pads and disc/drum are measured after each test cycle.
COMPRESSIBILITY TEST
160 bar pressure is applied on brake pad/lining at room temperature and 400 ºC to measure compressibility values of friction material. Thermal expansion of material and heat transfer are examined as well.
As a general rule, ratio of compressibility to total thickness should be in the ranges given below.
< 2 % è at room temperature
< 5% è at 400 °C
A pad/lining with low compressibility values indicates that material’s hardness is high and it may cause noise during braking.
A pad/lining with high compressibility values indicates that material’s hardness is low and there may be a risk of problem due to deception on brake feeling
SHEAR FORCE TEST
It is used to control junction of backing plate and friction material. Resistance of friction material to shear force is measured.
The shear force must be more than 350 N/cm2 and at least 80% of friction material must remain on backing plate according to the standards.
KRAUSS TEST MACHINE
It is used mainly for quality control purposes in serial production to check friction coefficient and wear. Krauss test is applied to each batch and by this means, the batch control is ensured.
RIVET BOTTOM FORCE TEST
It is used to check mechanical strength of countersink holes on brake linings which are used to attach drums by rivets.
BATCH CONTROL TESTS
Hardness and density of friction material are measured for every batch for quality control purposes.
ON ROAD TESTS
Performance and wear of the pads are measured directly on vehicles under conditions determined by standards.
The term “original” refers to the pad/lining mounted on vehicles in the first assembly. The brake lining/pads defined as original are the brake lining/pads used in the first assembly of the vehicle. The brake/lining pads to be used at the service stations and renovation market must be the parts defined as original or equivalent as well. Therefore, these equivalent brake lining pads must be tested and approved in accordance with ECE R90 regulations.
Since 2003, as Kale Balata, we have had our brake lining pads tested and approved by TÜV in Germany within the scope of ECE R90 and had E1 Number.
That number given by the authorized institutions is the evidence indicating that the brake lining pad provides the same value.
