Roller chains are essential power transmission components used in various industries and types of machinery. Replacing a roller chain requires accurate identification to ensure proper fitment. This guide will walk you through the process:
1. Check for Markings (The Easiest Way)
Almost all roller chains have their size stamped directly onto the outer link plates. Look for markings that may resemble something similar to the following:
- ANSI Numbers: "40," "50," "60," etc. (American National Standards Institute)
- ISO/BS Numbers: "06B," "08B," "10B," etc. (International Organization for Standardization/British Standard)
- Conveyor Style: "C2080H", "81X", "C40," etc.
Tips:
- Cleaning: In most situations the markings are obscured by dirt or grease, gently clean the chain with a degreaser and a wire brush.
- Multiple Plates: Markings may not be present on every link plate, so cleaning and checking multiple plates will be required.
2. Measure Your Old Chain (If No Markings)
If there are no visible markings, you'll need to measure the chain. Use a digital caliper for accurate measurements, and avoid using rulers or tape measures.
Key Measurements:
- Pitch: The distance between the centers of two consecutive pins. This is the primary factor in determining chain size.
- Roller Diameter: The diameter of the chain's rollers.
- Inner Width: The distance between the inner link plates.
Roller Chain Size Chart: Once you have your measurements, compare them to our roller chain size charts.
3. Additional Identification Tips
- Simplex, Duplex, or Triplex: Determine the number of roller strands in your chain (one, two, or three).
- Special Features: Look for any special features like offset links, extended pins, or attachments.
- Visual Comparison: If possible, compare your old chain with a new one of known specifications.
By following these steps, you can accurately identify your roller chain and find the correct replacement, ensuring smooth and efficient operation of your machinery.
