What this is
Two replacement chains for Worx’s 15 A corded 18” chainsaws — the WG304, WG304.1 and WG304.2. The Worx manual lists Oregon 91PX063X for them: 18”, 3/8” low-profile pitch, .050” gauge, 63 drive links. This pack is the same size. Oregon also lists it for the Craftsman 172.34120 and Greenworks 20032.
62 or 63 links?
The other 18” saws with this pitch and gauge that we list — Poulan Pro, Greenworks 80V and 60V, and the Greenworks 20332 — take 62 drive links. The Worx WG304 bar takes 63. One link is the difference between a chain that tensions properly and one that doesn’t, so count the old chain before ordering. For 62-link saws see our 18” 62-link chain.
One Worx manual, three bar lengths
| Worx model | Bar | Drive links |
|---|---|---|
| WG300 | 14” | 53 |
| WG303.1 | 16” | 57 |
| WG304.1 / WG304.2 | 18” | 63 — this chain |
Fitting it
The WG304 has a tool-free tensioning knob with a built-in ratchet. Worx’s check: at the middle of the bar you should be able to lift the chain about half the depth of a drive link. Its manual asks for a low-kickback chain and only manufacturer-specified bars and chains.
