Description

INA RSRA16-129-LO Belt Tension Idler Pulley

Includes 1 x INA RSRA16-129-LO Pulley

An idler pulley is a mechanical component used in belt-driven systems to guide or tension the belt. Unlike drive pulleys (which transmit power) or driven pulleys (which receive power), an idler pulley does not transmit power—it simply redirects or maintains tension in the belt or chain.

Key Functions of an Idler Pulley:

Guiding the Belt or Chain – Helps route the belt in a specific direction or around obstacles.

Maintaining Tension – Keeps the belt tight to prevent slippage and ensure proper function.

Absorbing Slack – Especially in systems where the belt length changes due to load or thermal expansion.

Common Applications:

• Automotive engines (timing belts, serpentine belts)
• Conveyor systems
• HVAC equipment
• Agricultural and industrial machinery

Key Features:

• Tapered Design: The bush has a conical shape, and when tightened, it grips the shaft and the hub firmly.
• Split Construction: Typically split on one side to allow it to compress onto the shaft as it’s drawn into the matching tapered bore of the pulley or sprocket.
• Standardized Sizes: Available in standardized metric and imperial sizes for various shaft diameters.

*Main listing image does not represent part number