2PC 18 Inch Chainsaw Chain

§ Saw Chains · SKU B0FDWWSQ4G

2PC 18 Inch Chainsaw Chain

$24 ★ 4.4

2PC 18 Inch Chainsaw Chain for CRAFTSMAN S1800 / S185, 18" Replacement Chain for CRAFTSMAN CMXGSAMY421S / CMXGSAMA421S Chainsaw

Bar length18"
Pitch3/8 LP"
Gauge.050""
Drive links62DL
CategorySaw Chains
Part numberB0FDWWSQ4G
ConditionNew — aftermarket replacement

Fitment last verified:

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Overview

A replacement chain engineered to match the original specifications of CRAFTSMAN S1800 / S185 chainsaws. Comes in a convenient 2-pack, giving you a ready spare. Running a dull chain forces the motor to work harder and shortens the life of your bar, making periodic replacement essential.

Key specifications

  • Bar length: 18”
  • Quantity: 2 chains per pack

Compatibility

This chain is designed to fit CRAFTSMAN S1800 / S185. Double-check your model number against the listing to ensure a correct match before installation.

Installation notes

Power down the saw and disconnect the battery or spark plug lead. Remove the side cover and release bar tension. Take the old chain off the bar and sprocket, then thread the new chain into the bar groove, confirming the cutting edges face forward on the top rail. Set the tension so the chain pulls freely without sagging away from the bar, and do a brief test run to verify everything tracks correctly.

Common questions

Q: Will this 2-pack 18-inch chain fit my CRAFTSMAN S1800, or is it only for the S185?

Yes, this chain set is made to fit both the CRAFTSMAN S1800 and S185 when they are using the 18-inch bar. If your saw still has the original 18-inch setup, these replacement chains should match correctly.

Q: Do I need to do anything special when installing one of these chains on my CRAFTSMAN S185?

Make sure the saw is unplugged before installation, then confirm the cutting teeth are facing forward on the top side of the bar. After mounting, set the chain tension so it sits snugly against the bar but can still be pulled around by hand, and recheck tension after the first few minutes of use.

Q: How often should I sharpen or replace these 18-inch chains on my CRAFTSMAN S1800?

That depends on what you cut, but if the saw starts making fine dust instead of chips, pulls to one side, or needs extra pressure, the chain likely needs sharpening. Replace the chain if the cutters are heavily worn, damaged, or if repeated sharpening no longer restores good cutting performance.

Compatibility

This part is verified to fit the following equipment. Always confirm the model number stamped on your machine before ordering.

CRAFTSMAN S1800
S185

Not sure which chain you need? See our guide: How to count drive links or Chain pitch, gauge & drive links explained.

Before you buy — how to verify fitment

  1. Find the bar stamp. Look on the side of your current guide bar for the pitch, gauge, and drive-link count.
  2. Match all three numbers. Pitch (3/8 LP), gauge (.050"), and drive links (62DL) must all match.
  3. Check bar length. Measure cutting length from the tip to where the bar enters the saw body — this should match 18".
  4. Confirm your saw model against the compatibility list above. If your model isn't listed, the chain may still fit if pitch/gauge/DL match.

Frequently asked questions

How do I know this chain fits my saw?

Match three numbers: pitch, gauge, and drive-link count. All three must match the stamp on your current bar. If even one is off, the chain won't fit safely.

How do I measure pitch and gauge?

Pitch is the distance between any three consecutive rivets, divided by two. Gauge is the thickness of the drive links — measure with a caliper or check the bar stamp. Our guide covers both in detail.

How long does a replacement chain last?

With proper tension and occasional sharpening, an aftermarket chain lasts 3–5 cords of firewood or about 5 hours of active cutting — roughly the same as OEM.

Can I sharpen this chain or is it single-use?

Absolutely sharpen it. A quality replacement chain can be sharpened 3–5 times before the cutters are too short. Keep a round file matched to the cutter diameter.

Where to buy

This part is available through Amazon with free returns on most orders. We've verified the fitment listed above — check the live listing for current price, stock, and delivery options.

Check current price on Amazon

Affiliate disclosure: we may earn a commission when you purchase through this link, at no extra cost to you.

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