Alpine Chain Co. EN58-S chainsaw chain.

Equivalent chain size

.325" PITCH | 0.058" GAUGE

• Echo 21BPX chain type (431717-30231 on the 18" bar)

Exact Fitment Specifications

To ensure compatibility with your Echo CS-501SX, verify your current guide bar matches these exact metrics:

CHECK YOUR BAR STAMPS, and send us a photo of your bar stamp in the chat bubble for a Guaranteed Fit!

Fits Saw Model: Echo | CS-501SX

Bar Length: 16" (68DL), 18" (72DL, standard) and 20" (80DL) options

Chain Pitch: .325"

Chain Gauge: 0.058" (1.5mm)

Cutter Profile: Semi-chisel

Sharpening File Size: 4.8mm round

Performance

• Durability: The semi-chisel tooth geometry is designed to withstand dry and dirty Australian hardwoods for sustained cutting.

• Specific use: For cutting dry firewood, Australian native hardwood timbers, soft timbers.

• Industrial Hardened Steel: Manufactured for high-torque professional saws, resisting thermal wear and chain stretch during heavy, sustained load.
  
  

  Need It Fast?

  Orders over $100 ship free by express; over $50 free standard. Orders are dispatched within 24 hours of processing.

  Echo CS-501SX Chain Questions

  What size chain does an Echo CS-501SX take?

  .325" pitch, .058" (1.5mm) gauge, on every CS-501SX. Drive link count depends on your bar: 68 DL for the 16" bar, 72 DL for the 18" bar (standard), 80 DL for the 20" bar.

  How many drive links is a CS-501SX chain?

  Count depends on bar length — see the list above. If you're unsure which bar you have, the DL count is usually stamped on the bar itself, or count the drive links on your old chain.

  What file do I use on a CS-501SX chain?

  A 4.8mm round file suits this .325" chain.

  Is the CS-501SX .058" or .050" gauge?

  Echo's chain chart lists .058" (1.5mm) for the CS-501SX on 16", 18" and 20" bars, and that's what this chain is. If your bar is stamped .050", don't order this one. Chat with us instead.

  Will this chain fit other Echo saws?

  Possibly, but please use our Search by Chainsaw tool to find your specific saw chain with no doubt.

  Is this a genuine Echo chain?

  No — it's an Alpine Chain Co. chain manufactured to fit the CS-501SX, replacing the Echo 21BPX chain type (431717-30231 on the 18" bar). Same pitch, gauge and drive link options, with a semi-chisel profile chosen for Australian hardwood. Every fit is backed by our Guaranteed Fit system.

How to Verify Your Chain Size

If you are unsure if this is the correct chain for your Echo CS-501SX, check the side of your current guide bar. The Pitch, Gauge, and Drive Link (DL) count are typically stamped directly into the bar near the mounting bolts.

Require technical verification? Chat with our specialist team using the chat bubble on screen, or ask our community on the Alpine Chain Co. Forum.