Roller

Product Introduction

　　Our company manufactures rollers using advanced processes and machining technologies, giving them the following characteristics:

　　Precise drum concentricity ensures smooth drum operation, maximizes contact with the belt surface, and guarantees simultaneous material discharge from the conveyor belt, thereby reducing shaft deformation and minimizing bearing loads. The thicker the drum shell, the better its ability to absorb forces. A larger rubber-covered surface angle can ensure that the conveyor belt achieves the desired traction force. Drum surfaces are categorized into three types: smooth, rubber-coated, and cast-rubber. When power is high and ambient humidity is low, smooth drums with a low coefficient of friction can be used; whereas when power is high and the environment is humid—leading to a higher risk of slippage—rubber-coated drums with a high coefficient of friction are recommended.

　　All drive rollers feature a herringbone or diamond-patterned rubber surface with a thickness of 16 mm and a Shore hardness of 60–70 degrees. Guide rollers have a smooth rubber surface with a thickness of 12 mm and a Shore hardness of 50–60 degrees. All rubber surfaces are vulcanized in a single operation.

　　For drive rollers that transmit large torques and redirecting rollers bearing heavy loads, our company adopts a cast-welded structural design. The connection between the shaft and the hub employs an annular locking device, which effectively avoids stress concentration, thereby enabling greater and more reliable torque transmission. The drum shell typically features a cast-welded structure; alternatively, it can also adopt a new technology involving integral welding of steel plates. The manufacturing process begins by rolling steel plates into drum shells. Next, the assembly consisting of the flange and shaft is inserted into the drum shell, followed by alignment and adjustment before welding takes place. This process ensures that the drum meets technical requirements regarding static balance, wall thickness variation of the drum shell, and axial runout of the drum shell, and it helps to reduce internal stresses within the drum.

Main technical performance parameters

Radial runout of the drum's outer diameter

● Smooth roller

When φ < 800 mm, ≤ 0.55 mm

When F > 800 mm, ≤ 0.95 mm

● Rubber-faced roller

When φ < 800 mm, ≤ 1.05 mm

When φ > 800 mm, ≤ 1.40 mm

● Wall thickness difference

When b = 6–10 mm, ≤ 1.30 mm; when b = 12–28 mm, ≤ 1.80 mm.

The roller's static balance accuracy reaches G40.