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Oregon Power Mate® Rim Sprocket System - 100791XSF
The Oregon 100791XSF Power Mate® Sprocket System is a professional-grade drive solution specifically for Stihl professional and mid-range saws running .325" pitch chain. This two-piece system includes a high-durability clutch drum and a replaceable rim, delivering smoother power transfer and reduced vibration compared to standard spur sprockets.
Self-Aligning Rim Technology
The Power Mate® system allows the rim to slide along a splined hub, ensuring the chain is always perfectly centered with the guide bar groove. This floating action minimizes side-loading on the drive links and bar rails, resulting in a cooler-running saw and a longer lifespan for your cutting equipment.
Model Compatibility:
| Stihl |
- Professional Series: 024, 026, MS 260, MS 260 Pro
- Mid-Range Series: MS 270, MS 270 C, MS 270 C-B, MS 270 CQS
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Specifications:
| Pitch | .325" |
| Tooth Count | 7 Tooth |
| Spline Size | Small 7 Spline (SM7) |
| Manufacturing | Cold-Forged Steel |
🛠️ Mechanic's Tip:
The .325" pitch system is common on saws like the MS 260 because it offers a great balance of speed and power. When installing, always check that your bar tip, chain, and this rim all share the exact same .325" pitch. Replace the rim after every two chains to prevent the teeth from wearing so deep that they damage the chain drive links. Don't forget to grease your needle bearing (sold separately) during every rim change.
- Pitch: .325", Size: Small 7 Spline, Tooth Count: 7
Two-piece design includes a drum with a replaceable rim, allowing rim to be replaced multiple times before the entire unit is replaced
Extend operational life by maximizing chain and bar groove alignment
For best performance, replace every three rims
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Fits models:
- Stihl 024, 026, MS 260, MS 260 Pro, MS 270, MS 270 C, MS 270 C-B, MS 270 CQS
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chain saw parts ms 260 pro 
