Maximize chain speed and timber-cutting productivity on your high-displacement chainsaw with the Genuine OEM STIHL 3/8" 8-Tooth Rim Sprocket Kit (Part #1122 007 1001). Engineered for severe-duty forestry and high-output logging, this floating rim system lets the saw chain align naturally with the guide bar groove—dramatically reducing friction, bar wear, and chain stress under heavy load. This direct-fit replacement kit contains all key hardware for a fast drive line overhaul.
Why Choose Genuine OEM over Aftermarket? Commercial-grade 80cc to 90cc+ powerhouses subject drive components to extreme torque and high RPMs. Cheap aftermarket rim kits frequently feature soft metal rims that groove rapidly, out-of-spec drums, and weak retaining clips that risk sudden failure during heavy bucking or felling. STIHL OEM assemblies guarantee exact dynamic balance, precise needle bearing fitment, and maximum operational safety.
What's Included
- (1) Heavy-Duty Clutch Drum
- (1) Replaceable 3/8" 8-Tooth Rim Sprocket
- (1) Precision Clutch Washer
- (1) Factory E-Clip Retaining Ring
Key Features
- 100% Genuine OEM STIHL Quality: Built from high-density, heat-treated structural steel alloys to withstand severe commercial duty cycle stress.
- High-Speed 3/8" Pitch 8-Tooth Profile: The larger 8-tooth rim diameter increases overall chain speed for faster cross-cutting and high-output timber processing on large saws.
- Self-Aligning Floating Rim: Keeps chain drive links centered in the bar groove, extending both bar and chain service life while smoothing out overall cutting operation.
- Cost-Effective Maintenance: Allows you to replace only the worn outer rim sprocket during routine servicing rather than replacing the entire drum assembly.
- Complete Replacement Hardware: Includes required drive line washer and retaining clip to ensure a fast, reliable installation.
Product Specifications & Compatibility
| Brand / Tier | STIHL® Genuine OEM Component Kit |
| Part Number / SKU | 1122 007 1001 (1122-007-1001 / 11220071001) |
| Chain Pitch / Teeth | 3/8" Standard Pitch | 8-Tooth (8T) Rim |
| System Design | Replaceable Floating Rim Sprocket & Clutch Drum System |
| Kit Contents | Clutch Drum, Rim Sprocket, Clutch Washer, E-Clip |
| Verified Compatible Models | • 064 Series: 064, 064 R, 064 RW • 066 Series: 066 M, 066 MR • MS 650 Series: MS 650 Magnum, MS 650-R Magnum • MS 660 Series: MS 660 Magnum, MS 660-R Magnum • MS 661 Series: MS 661 Magnum, MS 661-R Magnum, MS 661 C-M Magnum, MS 661 C-M R Magnum |
| Note | Needle bearing sold separately. Always inspect bearing during drive overhaul. |