Products Description
Chain Saw MS250 20″ .325 Alloy Guide Bar
20-Inch Laminated Guide Bar for STIHL MS250 & Mid-Range Saws
This 20-inch alloy guide bar is designed for STIHL MS250 chainsaws and compatible mid-range models, providing extended reach for larger cutting tasks without compromising the saw's power-to-weight balance. Engineered with a .325" pitch, .063" gauge, and 20-inch length, this bar pairs with 67 or 68-drive-link chains depending on the specific configuration. The laminated sprocket-nose construction features three electrically welded steel plates with a hollowed center section, delivering excellent stability while remaining lightweight for reduced operator fatigue. Replacing OEM part number 3003 008 8921, this guide bar is built for firewood cutting, storm cleanup, and property maintenance tasks where extended reach and cutting capacity are essential.
Technical Profiles & Materials
20-Inch Extended Reach – The 20-inch cutting length is the maximum recommended bar size for the MS250 platform, offering the longest reach for felling and bucking larger timber. This length pairs with chains typically containing 67 or 68 drive links.
.325″ Pitch & .063″ Gauge – This guide bar uses the .325″ pitch and .063″ gauge (1.6mm) configuration, which is the standard specification for the MS250 when equipped with longer bars. The .325″ pitch chain delivers aggressive cutting performance suitable for the saw's 3.1 HP output.
Rollomatic Ematic™ Lubrication System – Compatible with STIHL's Ematic™ oil-saving system, which reduces chain lubricant consumption by up to 50% compared to conventional bars. The system works with the variable-flow oil pump and Oilomatic chain to deliver lubricant precisely where needed.
Technical Specifications
| # | Parameter | Specification |
|---|---|---|
| 1 | Bar Length | 20 inches (50.8 cm) |
| 2 | Chain Pitch | .325″ (0.83 cm) |
| 3 | Gauge | .063″ (1.6 mm) |
| 4 | Drive Links (Typical) | 67 or 68 |
| 5 | Bar Type | Laminated sprocket-nose (Rollomatic E / Wood Boss) |
| 6 | Lubrication System | Ematic™ compatible |
| 7 | Material | Laminated steel with heat-treated rails |
| 8 | OEM Reference | 3003 008 8921 |
| 9 | Bar Mount | STIHL 3005 small mount |
| 10 | Saw Compatibility | MS250, MS230, MS251, 023, 025, 021 |
Quality and Craftsmanship Details
Products Package
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FAQ
Q: What chain do I need with this 20-inch guide bar?
A:This guide bar requires a .325″ pitch, .063″ gauge chain with either 67 or 68 drive links, depending on the specific bar model. Compatible chains include STIHL 26RM3 68 (3634 000 0068) for use with this bar's typical configuration. Always verify the drive link count on the bar itself before ordering.
Q: Will this bar fit my STIHL MS250 with the .050″ gauge chain?
A: This bar uses .063″ gauge (1.6mm). If your current MS250 uses .050″ gauge chains, you will need either a different bar or new chains. Some older MS250 models were equipped with .050″ gauge bars; check your current bar's specifications to avoid compatibility issues.
Q: How do I confirm this bar fits my saw before ordering?
A: Check your saw's drive sprocket pitch (.325″), confirm it uses the STIHL 3005 small bar mount, and verify your saw supports a 20-inch bar. The bar typically has the recommended chain size etched on it, and the 20-inch length is within the MS250's supported range of 16″–20″ bars.
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