Rubber Conveyor Rollers & Idlers: Traction, Protection & Durability
Our rubber rollers and idlers provide essential performance benefits for a wide range of conveyor applications. Available as rubber-lagged drive rollers for superior traction, impact rollers for load zone cushioning, and return rollers for belt cleaning and noise reduction—these components are built to protect belts, absorb shock, and improve system reliability.
Key Advantages:
Enhanced Grip: Rubber-lagged drive rollers prevent belt slippage.
Belt & Impact Protection: Cushions heavy loads at feed points.
Noise & Vibration Damping: Quieter than steel rollers.
Cost-Effective Durability: Long service life in general to medium-duty use.
Self-Cleaning Properties: Return rollers reduce material carryback.
Ideal for mining, agriculture, package handling, and bulk material conveyors. Available in various lagging patterns (diamond, herringbone, smooth) and rubber compounds.
Conveyor Idler (Roller) – Component Breakdown & Description
A standard steel conveyor idler consists of the following main components:
1. Tube / Shell
The cylindrical body of the idler. It directly supports the conveyor belt and the material being carried. The tube must have high roundness and straightness to minimize rotational resistance and prevent belt misalignment.
2. Shaft
A solid metal rod that runs through the center of the idler. The shaft ends are mounted on the conveyor frame. It withstands bending moments and shear forces while allowing the tube to rotate around it.
3. Bearing
Mounted inside the bearing housing. The bearing enables smooth rotation of the tube around the stationary shaft. Most idlers use deep groove ball bearings with C3 internal clearance to accommodate temperature changes and shaft expansion.
Common models: 6204, 6205, 6206, 6305, 6306, 6307, 6308.
4. Bearing Housing (Casting / Insert)
A precision-machined component pressed into both ends of the tube. It holds the bearing and ensures the bearing is perfectly aligned with the tube’s center axis. Poor housing alignment leads to increased resistance and premature failure.
5. Labyrinth Seal
A non-contact sealing system consisting of multiple interlocking rings that create a long, winding path (the "labyrinth"). This prevents dust, water, and fine materials from entering the bearing chamber while adding almost no rotational friction.
6. Inner Seal (Flinger Seal / Rubber Seal)
Located between the bearing and the labyrinth seal. This component acts as a flinger — centrifugal force throws out any fine dust that manages to pass the outer labyrinth. It also helps retain grease inside the bearing area.
7. Grease (Lubricant)
Lithium-based grease is pre-filled inside the bearing cavity. It provides lubrication, prevents metal-to-metal contact, resists water washout, and offers rust protection. Proper grease quantity is critical — too much increases resistance, too little causes bearing failure.
8. End Cap (Outer Cover / Dust Cover)
The outermost component, pressed or snapped onto the end of the tube. It protects the labyrinth seal from large debris and direct impact. Some designs use a removable cap for maintenance access.
