The real reason you can’t make a perfect HEXA chain from other chain brands

Introduction

This tutorial provides a step-by-step guide on how to file a hexa chain from scratch, based on insights from Indiana Doug's video. We will explore the differences between hexa chains and standard round chains, and discuss the specific filing techniques needed to achieve optimal performance.

Step 1: Understand the Differences in Chain Angles

• Hexa Chains vs. Round Chains: Hexa chains are designed for a different cutting angle than standard round chains.
• Filing Angles:
  • Standard round chains are often filed at 30 degrees.
  • Hexa chains should be filed at approximately 25 degrees (note the difference of about 5 degrees).
• Identify the Witness Mark: Locate the witness mark on your chain to determine the correct filing angle.

Step 2: Gather Your Tools

• Required Tools:
  • Round file suitable for the chain type (e.g., Oregon or Husqvarna).
  • Vice to hold the chain securely while filing.
  • Measuring tools to confirm angles and dimensions.
• Setup: Ensure you are working in a well-lit area and have a stable workspace.

Step 3: File the Chain

• Position the Chain: Secure the chain in the vice, ensuring it is stable and accessible.
• Filing Technique:
  • Start by filing at the top plate of the tooth, keeping the 25-degree angle in mind.
  • Focus on the angle and ensure you are filing a bit more than the witness mark to achieve the hexa profile.
• Observations:
  • Look for the shape of the gullet – it should be straighter compared to round chains.
  • The filing should result in a thinner, sharper tooth compared to a standard round chain.

Step 4: Compare Tooth Dimensions

• Measure Tooth Sizes:
  • Use calipers to measure the width and length of the teeth.
  • For example, a standard C83 round tooth might measure around 63-64 thousandths, while a hexa tooth should measure about 57-58 thousandths.
• Understand Implications: The smaller tooth size contributes to the efficiency of the hexa chain.

Step 5: Assess Performance

• Evaluate Your Work: After filing, check the sharpness and shape of the chain teeth.
• Consider Real-World Performance: Understand that while you can get close to a hexa profile, you may not achieve a perfect match due to the inherent design differences of the chains.
• Test the Chain: If possible, conduct a performance test to see how your filed chain compares to a factory-made hexa chain.

Conclusion

Filing a hexa chain from a standard round chain involves understanding the necessary angle adjustments and the unique design elements of hexa chains. By following the steps outlined, you can create a chain that operates efficiently, even if it may not perfectly replicate a factory hexa chain. For those looking to enhance their chainsaw performance without the cost of new chains, mastering this filing technique is a valuable skill. Happy filing!