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Description
1251 642 1201 – STIHL Chain Sprocket (Genuine STIHL OEM Drive Sprocket)
The STIHL 1251 642 1201 Chain Sprocket is a genuine OEM replacement drive sprocket engineered to deliver smooth, efficient power transfer from the clutch drum to the saw chain on compatible STIHL chainsaws. Manufactured to STIHL's exact factory specifications, this precision-machined sprocket ensures proper chain engagement, minimizes drivetrain wear, and maintains peak cutting performance in demanding forestry and arborist applications.
Constructed from hardened, wear-resistant steel, the 1251 642 1201 Chain Sprocket is built to withstand high rotational speeds, heavy cutting loads, and continuous operation. Replacing a worn sprocket with a genuine STIHL OEM component helps extend the service life of the guide bar and saw chain while restoring smooth, efficient power transmission.
Product Details
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Part Number: 1251 642 1201
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Brand: STIHL
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Part Type: Chain Sprocket
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Function: Transfers engine power from the clutch drum to the saw chain
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Material: Heat-Treated Hardened Steel
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Installation: Direct OEM Replacement
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OEM Status: Genuine STIHL OEM Part
Key Features
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Genuine STIHL OEM chain sprocket
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Precision-machined for smooth chain engagement
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Heat-treated hardened steel construction
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Excellent wear resistance
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Helps reduce chain vibration and drivetrain wear
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Maintains proper chain speed and power transfer
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Direct replacement with no modifications required
Function
The 1251 642 1201 Chain Sprocket engages the saw chain and transfers rotational power from the clutch assembly, allowing the chain to travel smoothly around the guide bar. A properly functioning sprocket improves cutting efficiency, reduces premature chain wear, and helps maintain safe chainsaw operation.
Compatible STIHL Equipment
The STIHL 1251 642 1201 Chain Sprocket is used on selected STIHL chainsaw models utilizing OEM part number 1251 642 1201.
Always verify your chainsaw model, serial number, sprocket type, pitch, and original OEM part number before ordering to ensure proper compatibility.
Who Is This For?
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Professional arborists
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Forestry professionals
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Tree service companies
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Firewood producers
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Chainsaw repair technicians
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STIHL chainsaw owners
Recommended Applications
Ideal for:
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Chain drive maintenance
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Sprocket replacement
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Chainsaw rebuilds
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Professional tree work
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Forestry applications
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Preventive maintenance
Pros
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Genuine STIHL OEM quality
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Precision-machined for factory fit
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Hardened steel construction
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Smooth and efficient power transfer
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Reduces wear on chains and guide bars
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Long service life
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Easy direct replacement
Cons
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Compatible only with specified STIHL chainsaw models
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For maximum performance, replace the sprocket when installing every two new chains or whenever significant wear is present
Comparison – STIHL 1251 642 1201 OEM Chain Sprocket vs Aftermarket Sprockets
STIHL 1251 642 1201 Genuine OEM Chain Sprocket
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Exact OEM dimensions and tolerances
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Premium heat-treated steel construction
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Smooth chain engagement
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Superior durability
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Designed specifically for STIHL chainsaws
Aftermarket Chain Sprockets
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May vary in machining precision
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Variable material quality
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Potential fitment inconsistencies
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Reduced service life under heavy-duty use
Why Buy from Barry's Power Equipment?
Barry's Power Equipment is an authorized STIHL dealer supplying genuine OEM replacement parts trusted by professional arborists, forestry crews, and outdoor power equipment technicians.
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Genuine OEM STIHL replacement parts
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Fast nationwide shipping
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Competitive pricing
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Expert technical support
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Extensive inventory for STIHL, SCAG, Toro, Exmark, Wright, Ariens, Gravely, Hydro-Gear, Kawasaki, Kohler, Honda, Briggs & Stratton, Ferris, Hustler, Cub Cadet, John Deere, and many other leading outdoor power equipment brands.




