What this is
Two replacement chains in the 10” size Oregon sells as 90PX040G: 3/8” low-profile pitch, .043” gauge, 40 drive links. Ryobi calls this chain RY10C1 (“Y40 .043""), Milwaukee 49-16-2723, Makita E-02434 and Black+Decker RC1000. It is the factory size on a long list of 10” saws and pole saws:
- Ryobi: 18V and 40V chainsaws from the P540 to the P547, the P2502BTL / P2520 brushless saws, the RY40506BTL, RY40560 and RY40570 pole saws, the RYPRN33 pruner attachment and several older gas pole saws
- Milwaukee: the M18 2825-20PS / 2825-21PS pole saw and the 49-16-2720 attachment
- Makita XCU06, Black+Decker LCS1020, Worx WG322, the EGO PSA1000 attachment, SKIL PS4561C and the Kobalt 40V KPS 1040 pole saws
The full list, with each maker’s own chain and bar parts, is in the table below.
The two 10-inch sizes
Both common 10” sizes have 40 drive links; the gauge separates them:
| Gauge | Examples |
|---|---|
| .043” | Ryobi, Milwaukee 2825, Makita XCU06, Black+Decker LCS1020, Worx WG322 — this chain |
| .050” | Worx WG309, Sun Joe SWJ803E, Makita XAU02ZB, Craftsman CMCCS610 — our .050” 10” chain |
Some 10” pole saws take neither: Milwaukee’s 3013-20 telescoping pole saw uses .325” chain, and Kobalt’s 80V KPS 1081-06 a 1/4” chain (ours is here). Worx owners: we also have a page written for the Worx WG322 and WG323.
Fitting it
The Black+Decker LCS1020 uses tool-free tensioning: a tensioning knob turned clockwise, locked with a bar-adjust knob. Black+Decker’s check is that the chain should snap back after being pulled 1/8 inch from the bar, and it recommends rechecking often in the first two hours while a new chain stretches. On other saws, follow the tensioning steps in your manual.
