What this is
Replacement chains, sold in 2- and 3-packs, in a 14” size shared by several brands: 3/8” low-profile pitch, .050” gauge, 52 drive links. The Worx WG305 manual lists Oregon 91PX052X for this size; Echo sells it as 91PX52CQ, Makita as E-00234, Homelite as 901212001, HART as 682006004 and Craftsman as CMZCSC14 (corded CMECS614) or 713-05277 (gas S145).
Two 14-inch sizes look alike
Makita and Greenworks both sell a second 14” chain with the same 3/8” low-profile pitch and 52 drive links. What separates them is the gauge:
- .050” — this chain. Worx WG305, Homelite UT43100–UT43104, Craftsman CMECS614 and S145, Echo CS-310 (14” bar), Makita EA3201SRBB.
- .043” — Makita’s 14” chain for its battery saws, and a Greenworks 14” chain sold for other Greenworks models. Same length and link count, thinner drive links.
The gauge is usually stamped on the bar near the saw body. Check it before you order: a .050” chain won’t seat in a .043” bar.
Check the bar length, not just the saw
The Echo CS-310 is sold with either a 14” or a 16” bar, and Makita’s UC3551A and UC4051A share a manual but are 14” and 16” saws. Measure your bar or count the drive links on the old chain: it should be 52.
Fitting it
The Worx WG305 has a tool-free tensioning knob with a built-in ratchet. The Echo CS-310 has a side-access chain tensioner.
