Restore ultra-smooth cutting performance and maximum power transfer to your high-output chainsaw with the Genuine OEM STIHL 3/8" 7-Tooth Rim Sprocket Kit (Part #1128 007 1017). Designed as a floating rim drive system, it allows the saw chain to float and self-align naturally with the guide bar groove—dramatically reducing wear, vibration, and chain strain. This complete direct-fit replacement kit contains all key mounting hardware for a fast drive line overhaul.
Why Choose Genuine OEM over Aftermarket? Commercial-grade high-torque platforms like the MS 461 and fuel-injected MS 500i exert extreme rotational force on drive components. Cheap aftermarket rim kits often feature soft steel rims that wear out quickly, improper drum tolerances, and weak retaining clips that risk failure under heavy cutting loads. STIHL OEM assemblies guarantee exact dynamic balance, precise bearing tolerances, and commercial-grade durability.
What's Included
- (1) Heavy-Duty Clutch Drum
- (1) Replaceable 3/8" 7-Tooth Rim Sprocket
- (1) Precision Clutch Washer
- (1) Factory E-Clip Retaining Ring
Key Features
- 100% Genuine OEM STIHL Quality: Precision-machined from high-density, heat-treated steel alloys built for maximum service life under intense professional loads.
- High-Torque 3/8" Pitch 7-Tooth Profile: Calibrated specifically to maximize pulling power and chip clearance on large-displacement powerheads in heavy wood cutting.
- Self-Aligning Floating Rim: Floating rim design keeps drive links centered in the bar slot, extending both chain and guide bar lifespan.
- Economical Maintenance: Allows you to replace only the outer rim sprocket during routine servicing rather than replacing the entire drum unit.
- Complete Direct-Fit Kit: Includes the essential mounting washer and clip hardware required for a fast, hassle-free installation.
Product Specifications & Compatibility
| Brand / Tier | STIHL® Genuine OEM Component Kit |
| Part Number / SKU | 1128 007 1017 (1128-007-1017 / 11280071017) |
| Chain Pitch / Teeth | 3/8" Standard Pitch | 7-Tooth (7T) Rim |
| System Design | Replaceable Floating Rim Sprocket & Clutch Drum System |
| Kit Contents | Clutch Drum, Rim Sprocket, Clutch Washer, E-Clip |
| Verified Compatible Models | • MS 461 Series: MS 461, MS 461-R, MS 461-R Rescue, MS 461-VW • MS 500i Series: MS 500i, MS 500i-R, MS 500i Centennial Edition |
| Note | Needle bearing sold separately. Always inspect bearing during drive overhaul. |