Alpine Chain Co. LT43-S chainsaw chain.

Equivalent chain size

3/8" LP PITCH | 0.043" GAUGE

• Ryobi RCHT12

Exact Fitment Specifications

To ensure compatibility with your Ryobi OCS1830BL, 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: Ryobi | OCS1830BL (tool only) / RCS1830BLX4 (kit), 18V ONE+ HP Brushless 12"

Bar Length: 12" (45DL)

Chain Pitch: 3/8" LP

Chain Gauge: 0.043" (1.1mm)

Cutter Profile: Semi-chisel

Sharpening File Size: 4.0mm 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.

  Ryobi OCS1830BL Chain Questions

  What size chain does a Ryobi OCS1830BL take?

  3/8" LP pitch, .043" (1.1mm) gauge, 45 drive links, on its standard 12" bar.

  How many drive links is an OCS1830BL chain?

  45 drive links on the standard 12" bar. If you're unsure, 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 an OCS1830BL chain?

  A 4.0mm round file suits this 3/8" LP chain.

  Will this chain fit other Ryobi saws?

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

  Is this a genuine Ryobi chain?

  No — it's an Alpine Chain Co. chain manufactured to fit the OCS1830BL, replacing the Ryobi RCHT12. Same pitch, gauge and drive link count, 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 Ryobi OCS1830BL, 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.