How to see the quality of semi-trailer axle?
As the main model of logistics transportation, the axle quality of semi-trailer directly affects driving safety and operating costs. However, the market is mixed, and many inferior axle attract consumers at low prices, which eventually leads to frequent maintenance and even serious accidents.
1. Inferior axle
Before purchasing the axle, first understand the hidden dangers that may exist in the inferior axle to better identify:
Material is not up to standard: the use of low-strength steel or inferior cast iron, easy to break, deformation.
Rough processing: bearing seat, shaft tube welding is not firm, easy to crack, oil leakage.
Poor accessories: brake drums, bearings, oil seals and other cheap accessories, short life.
Dynamic balance: serious jitter at high speed, aggravate tire wear.
Poor anti-corrosion: anti-rust treatment is not in place, rust corrosion in a short time.
2. How to distinguish the quality of the axle?
Look at the material and process
Axle tube material: high-quality axle generally uses high-strength alloy steel, inferior products may use ordinary steel, can be tested with magnets (alloy steel magnetism is weak).
Welding process: Observe whether the welding is smooth, no porosity, poor quality axle welding rough, easy to crack.
Brake drum material: High quality brake drum is made of high grade cast iron, inferior products may be doped with scrap iron, and the percussion sound is dull.
Check bearing and lubrication
Bearing brand: Well-known brands are more reliable, inferior axle may use no standard or cottage bearings.
Lubrication system: High quality axle adopts fully enclosed oil lubrication or maintenance-free bearing unit, poor quality axle may not seal tightly, easy to enter sediment resulting in wear.
Test dynamic balancing
When driving at high speed (more than 80km/h), if the steering wheel or the body shakes obviously, it indicates that the dynamic balance of the axle is poor, and long-term use will lead to abnormal tire wear.
Observation treatment
High-quality axle will be sandblasted + electrophoresis or galvanized treatment, inferior axle may only spray ordinary paint, rust in a short time.
Relative weight
The same specifications of the axle, quality products due to high material density, greater weight. Inferior axle may cut corners, the weight is significantly light.
View certifications and brands
The regular brand axle will have ISO certification, TS16949 certification, etc., and mark the manufacturer, model and other information.
3. The harm of inferior axle
Large safety hazards: breakage, brake failure, etc., may lead to serious accidents.
High maintenance costs: frequent replacement of bearings and brake drums, increasing operating costs.
Increased fuel consumption: large friction resistance, poor dynamic balance, resulting in decreased fuel economy.
Shortened vehicle life: long-term use of inferior axle will accelerate the damage of suspension, tires and other components.
4. Purchase advice
Not cheap: Low price axle often means low cost materials, later maintenance costs may be higher.
Choose formal channels: try to buy through brand dealers or reputable manufacturers.
Regular inspection: Even if you choose a high-quality axle, it is necessary to maintain it regularly to avoid overloading.
DARO semi-trailer axle reminds you that the axle is the "leg" of the semi-trailer, and the quality directly affects driving safety and operating efficiency. Owners must polish their eyes when purchasing, to avoid being deceived by low-quality products.
