Roller Chain

What Is A Roller Chain?

A roller chain is a type of mechanical chain commonly used in various power transmission and conveying applications. It consists of a series of interconnected links, typically made of metal, with cylindrical rollers positioned between the inner plates of the chain. The rollers allow for smooth and low-friction movement of the chain.

The basic components of a roller chain include:

Inner plates: These are flat metal plates that form the inner structure of the chain. They have holes or slots for connecting pins and contain the rollers.

Outer plates: These are also flat metal plates that surround the inner plates, enclosing the rollers and providing protection and support to the chain.

Pins: The pins are cylindrical metal rods that connect the inner plates and hold the chain together. They pass through the holes or slots in the inner plates and provide the pivot points for the chain’s articulation.

Rollers: The cylindrical rollers are positioned between the inner plates and rotate on the pins. They reduce friction and wear by allowing the chain to roll smoothly over sprockets or other surfaces.

Bushings: Some roller chains have bushings, which are cylindrical metal sleeves positioned between the pins and the inner plates. Bushings reduce wear and provide additional support to the chain.

How To Measure Roller Chain?

o measure a roller chain, you will need to determine its pitch, which refers to the distance between the centers of two adjacent roller pins. Here’s a step-by-step guide on how to measure a roller chain:

Identify the Pitch: Look for markings on the roller chain that indicate its pitch. The pitch may be expressed numerically or with a code, such as 420, 520, or ANSI #40, #50, etc. If the chain does not have any markings, you will need to measure the pitch manually.

Measure the Roller Pin Centers: Use a caliper or ruler to measure the distance between the centers of any two adjacent roller pins. Ensure that the measurement is taken from the center of one pin to the center of the next pin.

Verify the Measurement: Compare the measured distance to the standard values for roller chain pitches. The most common roller chain pitches include 0.25″ (6.35 mm), 0.375″ (9.525 mm), 0.5″ (12.7 mm), 0.625″ (15.875 mm), and 0.75″ (19.05 mm).

Determine the Roller Chain Size: Once you have the pitch measurement, you can determine the roller chain size. Roller chains are typically identified by a code that includes the pitch value. For example, a roller chain with a pitch of 0.5″ is often referred to as ANSI #40 chain.

How To Maintain Roller Chain？

Here are some key steps to maintain roller chains:

Lubrication: Regular and proper lubrication is crucial for the smooth operation of roller chains. Lubrication helps reduce friction, wear, and corrosion. Use a high-quality lubricant specifically designed for roller chains.

Tension Adjustment: Maintain the proper tension in the roller chain to prevent excessive wear and elongation. Check the tension regularly and adjust it as needed.

Inspection: Regularly inspect the roller chain for signs of wear, damage, or misalignment. Look for elongation, bent or damaged links, worn sprocket teeth, and excessive chain stretch. Replace any worn or damaged components promptly.

Cleaning: Keep the roller chain clean and free from debris, dirt, and contamination. Regularly clean the chain using a suitable solvent or cleaner to remove built-up grime and contaminants.

Sprocket Inspection: Inspect the sprockets for signs of wear, damage, or tooth wear. Worn or damaged sprockets can accelerate chain wear and reduce performance.