26RM3 74E Saw Chain
Part No. 3689 005 0074
STIHL 3689 005 0074 — Saw Chain 26RM3 74E
Also known as: STIHL Rapid Micro 3 Chain, RM3 74 Drive Links, 18" Chainsaw Replacement Chain
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Specifications
| Specification |
Detail |
| Part Number |
3689 005 0074 |
| Brand |
STIHL |
| Chain Type |
Rapid Micro 3 (RM3) |
| Drive Links |
74 |
| Pitch |
3/8" |
| Gauge |
.050" (1.3mm) |
| Bar Length (Recommended) |
18 inches |
| Cutter Style |
Full Chisel — Micro |
| Application |
Hardwood, Softwood, General Cutting |
The STIHL 3689 005 0074 is a Rapid Micro 3 (RM3) full-chisel saw chain designed for 18-inch guide bars on compatible STIHL gas-powered chainsaws. Also referred to as the STIHL 26RM3 74E, RM3-74 chain, or 74-drive-link 3/8" .050" replacement chain, this part delivers fast, smooth cutting performance in hardwood and softwood applications. It is commonly found on STIHL MS 271, MS 291, MS 311, and MS 391 chainsaw models. The micro-geometry cutter profile reduces vibration and makes sharpening easier compared to standard full-chisel chains.
Key Features▼
3/8" Pitch .050" Gauge Chain Spec
The STIHL 3689 005 0074 uses a 3/8" pitch and .050" (1.3mm) gauge — the most popular chainsaw chain specification for mid-size saws. With 74 drive links, it is correctly sized for 18-inch guide bars and maintains proper tension and tracking throughout use.
Fast Cutting in Hardwood and Softwood
The Rapid Micro 3 cutter design delivers aggressive, efficient cutting through both hardwood and softwood. The 26RM3 74E chain is suited for firewood processing, felling, bucking, and limbing tasks where speed and clean cuts are required.
OEM STIHL Part — Direct Replacement Chain
Part number 3689 005 0074 is a genuine STIHL OEM saw chain, ensuring factory-spec fit and performance. This is the correct direct replacement for the original chain shipped with compatible STIHL chainsaws, with no modification required for installation.
Micro-Geometry Cutters for Reduced Vibration
The RM3 micro-geometry cutter profile lowers operating vibration compared to traditional full-chisel chains, making the STIHL 26RM3 74E a practical choice for extended cutting sessions. The cutter design also simplifies hand filing during routine chain maintenance.
Compatible Equipment▼
STIHL part 3689 005 0074 (26RM3 74E) is compatible with a range of STIHL gas chainsaws that accept an 18-inch bar with 3/8" pitch, .050" gauge, and 74 drive links. Always verify your bar length, pitch, gauge, and drive link count before ordering.
The STIHL 26RM3 74E chain fits models including the MS 271, MS 291, MS 311, MS 391, and other mid-range STIHL chainsaws configured with an 18" guide bar — part number 3689 005 0074 installs directly with no modifications.
- STIHL MS 271
- STIHL MS 291
- STIHL MS 311
- STIHL MS 391
- Other STIHL chainsaws with 18" bar, 3/8" pitch, .050" gauge, 74 drive links
Common Questions▼
Q: What does the STIHL part number 3689 005 0074 replace?
A: Part number 3689 005 0074 is the STIHL 26RM3 74E saw chain. It directly replaces the factory-installed chain on compatible STIHL chainsaws that use an 18-inch bar with 3/8" pitch and .050" gauge. No adapter or modification is needed.
Q: Will the STIHL 26RM3 74E chain fit my MS 271 or MS 291?
A: Yes. The STIHL MS 271 and MS 291 are among the most common chainsaw models that accept the 26RM3 74E (part 3689 005 0074) when fitted with an 18-inch guide bar. Always confirm your bar length and existing chain specs match 3/8" pitch, .050" gauge, and 74 drive links before installing.
Q: What is the difference between the STIHL RM3 chain and a standard full-chisel chain?
A: The Rapid Micro 3 (RM3) chain uses a micro-geometry cutter that reduces kickback risk and operating vibration compared to a conventional full-chisel chain. It also retains its edge well and is easier to sharpen by hand, making it a preferred choice for users who maintain their own equipment.
Q: How many drive links does the STIHL 3689 005 0074 have, and what bar length does it fit?
A: The STIHL 3689 005 0074 (26RM3 74E) has 74 drive links and is designed to fit an 18-inch guide bar with 3/8" pitch and .050" gauge. Drive link count, pitch, and gauge must all match your bar and saw specifications for safe, correct operation.
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