18-Inch 3/8" LP .050" Chain, 62 Links, for Ryobi RY3818, RY40508 / RY40580 and RY40HPCW01 (2-Pack)

Saw Chains · Part B0D3H4G5KL

18-Inch 3/8" LP .050" Chain, 62 Links, for Ryobi RY3818, RY40508 / RY40580 and RY40HPCW01 (2-Pack)

Name: 18-Inch 3/8" LP .050" Chain, 62 Links, for Ryobi RY3818, RY40508 / RY40580 and RY40HPCW01 (2-Pack)
Brand: OPULADUO
SKU: B0D3H4G5KL
Price: 25.98 USD

$26 ★ 4.5 on Amazon

Aftermarket 2-pack for Ryobi's 18" saws — the RY3818 gas saw, the 40V HP RY40508 (RY40580 kit, RY40508BTL), RY40HPCW01, RY10532 and RY43006: 3/8" low-profile, .050" gauge, 62 drive links, the size of Ryobi's RY18C1.

Bar length18"

Pitch3/8" LP

Gauge.050"

Drive links62DL

CategorySaw Chains

Part numberB0D3H4G5KL

ConditionNew — aftermarket replacement

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Saws this chain fits

Factory specs for each saw, taken from the manufacturer's own product page or manual (linked). Our chain matches every row on bar length, pitch, gauge and drive-link count.

Ryobi 40V HP brushless 18-inch cordless chainsaw RY40508 — Ryobi RY40508 — photo: RYOBI (source)

Saw	Sold as	Bar	Pitch	Gauge	DL	OEM chain	OEM bar	Source
Ryobi RY3818	38cc 2-cycle gas	18"	3/8" LP	.050"	62	901361003	312655001	556aa8d9de68ea9c4f29-0a8acad11a4df5016d26cc39a7429843.ssl.cf1.rackcdn.com
Ryobi RY40508	40V HP brushless; RY40508BTL tool only, RY40580 kit with 5Ah battery	18"	3/8" LP	.050"	62	682309001	—	ryobitools.com
Ryobi RY40HPCW01	40V HP	18"	3/8" LP	.050"	62	682309003	317105004	oregonproducts.com
Ryobi RY10532	gas	18"	3/8" LP	.050"	62	—	—	oregonproducts.com
Ryobi RY43006	13 A corded	18"	3/8" LP	.050"	62	—	—	oregonproducts.com

See the full Ryobi chain size chart →

Line drawing from the Ryobi RY3818 repair sheet showing the guide bar and saw chain with their parts-list key numbers — Parts-list exploded view for the Ryobi RY3818: key 75 is the 18-inch saw chain and key 76 the 18-inch guide bar assembly. Figure from the Ryobi RY3818 repair sheet, p. 2 (PDF).

Doesn't fit

Ryobi RY3714 (14" gas), RY40503, RY40530, RY405010 (40V) — Oregon lists these under S52: 14" bar, 3/8" LP .050" 52 drive links — same pitch/gauge but shorter chain (source)
Ryobi RY40502, RY40511 (40V) — Oregon lists these under 90PX052G: 14", 3/8" LP, .043" gauge, 52 DL — different gauge and length (source)

What this is

Two replacement chains for Ryobi’s 18” saws, gas, corded and 40V: the RY3818, the 40V HP RY40508 (sold as RY40508BTL or in the RY40580 kit), RY40HPCW01, RY10532 and RY43006. Ryobi’s own 18” chain is RY18C1. This pack is the same size: 18”, 3/8” low-profile pitch, .050” gauge, 62 drive links.

Check the bar length

Ryobi uses the same pitch across several saw sizes, so check the bar before ordering:

Ryobi saws	Bar	Chain
RY3818, RY40508, RY40HPCW01, RY10532, RY43006	18”	3/8” LP, .050”, 62 links — this chain
RY3714, RY40503, RY40530, RY405010	14”	3/8” LP, .050”, 52 links
RY40502, RY40511	14”	3/8” LP, .043”, 52 links

Fitting it

The RY3818 has a side-access chain tensioner. The 40V RY40508 / RY40580 is tensioned with a tool, which the saw stores on board.

Same size, other saws

This is the same 18” size we list for Oregon, EGO, Echo, Greenworks and other saws. This listing is the one written for Ryobi saws.

Frequently asked questions

Which Ryobi part number does this replace?

RY18C1, Ryobi's 18" replacement chain. Ryobi's service parts lists give 901361003 for the RY3818, 682309001 for the RY40508 and 682309003 for the RY40HPCW01.

What is the difference between RY40508, RY40508BTL and RY40580?

They are the same 40V HP 18" saw: RY40508BTL is sold without battery, and RY40580 is the kit with a 5Ah battery and charger.

Does it fit my Ryobi 14-inch saw?

No. Ryobi's 14" saws take a 52-link chain, and the 40V RY40502 / RY40511 use a thinner .043" gauge.