18 Inch Chainsaw Chain for Worx WG304, WG304.1, WG304.2, 18" Replacement Chain for Craftsman 172.34120

This 18-inch replacement chainsaw chain is made for specific electric saws that use an 18-inch bar, including Worx WG304, WG304.1, and WG304.2. It is also listed as a fit for Craftsman 172.34120 and Greenworks 20032 13A / 20032 14.5 chainsaws, making it a practical match when you need to restore clean, efficient cutting on those models.

Will this chain fit your saw?

Start with the model number on your saw and the size information printed on the guide bar. This chain is specifically listed as a replacement for:

• Worx WG304
• Worx WG304.1
• Worx WG304.2
• Craftsman 172.34120
• Greenworks 20032 13A
• Greenworks 20032 14.5

It also replaces these OEM part numbers:

• Husqvarna H37-63
• Stihl 63PM363E

Bar length is only the first checkpoint. An 18-inch bar does not always use the same chain across different saws, so you should also verify the chain specifications shown on the bar or in the owner’s manual:

• Pitch
• Gauge
• Drive-link count

Those three measurements must match your original chain for proper fit and safe operation. If your current chain is worn out, check the stamping on the bar rather than guessing from chain length alone. Matching the saw model from the list above is a strong sign of fitment, but confirming bar specs is the best way to avoid ordering the wrong chain.

Replacing the chain

Before starting, unplug the saw or disconnect it from power, and wear gloves. Chains are sharp even when dull enough to need replacement.

1. Loosen the side cover and back off the chain tension so the old chain can be removed easily.
2. Remove the side cover, lift the old chain off the drive sprocket, and slide it out of the bar groove.
3. Clean the bar groove, oil hole, and sprocket area before installing the new chain. Built-up sawdust and oil residue can affect chain tracking.
4. Fit the new chain around the drive sprocket and along the guide bar, making sure the cutting teeth face the correct direction on the top of the bar.
5. Reinstall the side cover and adjust chain tension until the chain sits snugly in the bar groove but can still be pulled by hand along the bar.
6. After a short test run, recheck the tension. A new chain can stretch slightly during initial use.

If the chain seems too loose or too tight even after adjustment, stop and recheck that the chain specs match your bar and saw.

Keeping it sharp

A sharp chain cuts faster, puts less strain on the motor, and helps you work more safely.

• Avoid cutting into dirt, gravel, or old wood with embedded debris. Even a brief touch with the ground can dull cutters quickly.
• Keep the chain properly tensioned and make sure bar oil is flowing. Poor lubrication increases heat and wear on both the chain and bar.
• Touch up the cutters regularly instead of waiting until the chain is very dull. Light, frequent sharpening usually gives better results than heavy filing after long use.

If your saw starts producing fine dust instead of chips, pulls to one side, or needs extra pressure to cut, it is usually time to sharpen or inspect the chain.

FAQ

Will this fit any 18-inch chainsaw?
No. Even if your saw has an 18-inch bar, the chain still has to match the correct pitch, gauge, and drive-link count. This chain is listed for Worx WG304, WG304.1, WG304.2, Craftsman 172.34120, and Greenworks 20032 13A / 20032 14.5.

What OEM chains does this replace?
This chain replaces OEM part numbers Husqvarna H37-63 and Stihl 63PM363E.

How tight should the chain be after installation?
It should sit in the bar groove without sagging underneath, but still move freely by hand when wearing gloves. Recheck tension after the first few cuts, since a new chain may settle in.

Why check the bar markings if my saw model is listed?
Bars can sometimes be replaced over the life of the saw. Verifying the bar’s pitch, gauge, and drive-link count helps confirm that the replacement chain matches the setup currently on your saw.