Crawler Crane Track Roller

Description

Crawler crane track roller, also known as bottom roller or lower roller, is a crucial undercarriage part in crawler cranes. It usually needs to bear the weight of the entire machine and ensure that the lower tracks run in the correct direction. This also means crawler crane require high impact resistance and wear resistance.

Core function of the crawler crane track roller

Track rollers play an important role in the daily operation of crawler cranes. On the one hand, it needs to bear the weight of the entire crawler crane. On the other hand, it also needs to constrain the lower part of the crawler crane to ensure that the tracks run along the correct track.

Processing technology and components of the crawler crane track roller

1 Model Design and Manufacturing

Professional technicians will analyze the overall structure of the track roller and use CAD and other tools for precise drawing design. Then make a sand mold based on the designed model

2 Material selection and casting

The raw materials for producing track rollers need to be selected based on various factors such as load-bearing capacity and operating conditions. After heating, the steel blank is forged under pressure to form the track roller rough forging.

3 Rough machining

The forged blank requires rough machining. Use a lathe to remove most of the excess and burrs, improving the overall processing efficiency in the future

4 Heat Treatment

Heat treatment is a vital step in manufacturing track rollers, greatly boosting their wear and impact resistance. Quenching rapidly raises the hardness of the roller body, while tempering removes internal stress built up during quenching and lowers workpiece brittleness. This quenching and tempering treatment gives the roller body balanced strength and toughness. It resists constant heavy loads and impacts on site, preventing the roller from fracturing entirely.

5 Precision Machining

Precision machining of workpieces can make their surface smoother and enhance their aesthetic appeal. On the other hand, precision machining further improves the accuracy of workpiece dimensions, which is more conducive to the installation and operation of track rollers.

6 Component Assembly

The various parts that have been processed need to be assembled. After assembly, quality inspection is still required

7 Surface Painting

Spraying paint on the surface of the track roller can improve the appearance of the workpiece while also preventing rusting.

Common problems and replacement signals for crawler crane track rollers

Rolling surface wear: If the contact surface of the track roller wears badly with deep grooves and its diameter reduces significantly, you should consider replacing it.
Oil leakage check: Oil seepage or leakage at both ends of the roller shows the floating oil seal is damaged. Continued use will rapidly wear out the internal bearings.
Crack inspection: Cracks or chipped pieces on the roller body create a risk of breakage under load, so replacement is mandatory.
Rotation test: Spin the track roller by hand. Stiff rotation, abnormal noise or excessive clearance means the inner bearings have failed.
Deformation check: A deformed roller shakes noticeably while working, which speeds up wear on the track and other undercarriage parts.

Essential characteristics of a high-quality bottom roller

Good wear resistance: The wheel surface has sufficient hardness. It resists fast wear under gravel and muddy working conditions for a longer service life.
Strong impact resistance: The wheel body features good toughness. It won’t easily crack under heavy loads and impact force.
Reliable sealing: The floating oil seals on both ends perform well. They block mud and water and prevent internal lubricant leakage to protect bearings.
High dimensional accuracy: Critical mating surfaces are well machined with proper assembly clearances. The roller spins smoothly without obvious wobble or jamming.
Stable material quality: Made of qualified alloy steel with uniform structure
Solid corrosion protection: Proper surface treatment keeps rust and corrosion at bay even in damp job-site conditions.

Summary

Our track rollers are built to stand up to tough site conditions. If you need reliable undercarriage parts for your crawler crane, feel free to send us your model and part number. Our team will help you find the right solution quickly.