Description
06605500 – Straight Key .25″ × .75″ × .25″ (Genuine OEM Ariens / Gravely Part)
The 06605500 straight key is a genuine OEM Ariens / Gravely shaft key used to lock pulleys, sheaves, and other rotating components to a shaft for reliable torque transfer. With dimensions of .25″ width × .75″ length × .25″ thickness, this key is commonly installed in mower deck drive systems, blade drives, and idler assemblies across a wide range of commercial and residential equipment.
Manufactured to Ariens and Gravely factory specifications, the 06605500 key ensures precise fitment, proper engagement in the shaft keyway, and dependable long-term performance under continuous load.
Key Details
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Manufacturer Part Number: 06605500
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Part Name: Straight Key
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Brand: Ariens / Gravely
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Dimensions:
• Width: .25″
• Length: .75″
• Thickness: .25″ -
Material: Hardened steel (OEM specification)
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Part Type: Straight shaft key
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Function: Locks rotating components to shaft for torque transfer
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Installation: Direct OEM replacement
Function & Application
The 06605500 straight key installs into a machined keyway on the shaft and mating component to prevent rotation slippage. It is critical for:
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Maintaining correct blade speed
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Preventing pulley or sheave damage
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Ensuring smooth power transmission
Typical applications include:
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Mower deck drive systems
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Blade and spindle drive components
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Idler pulleys and belt-driven assemblies
Compatibility
This OEM Ariens / Gravely straight key is used across many platforms, including:
Commercial & Zero-Turn Equipment
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PM250Z, PM260Z series (50″ & 60″ decks)
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Rapid XZ 52″, 60″, and 72″ mower decks
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Pro-Stance 36 models (deck, belt, blade, and spindle systems)
Deck & Drive Assemblies
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60″ and 72″ side-discharge mower decks
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72″ rear-discharge mower decks
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Deck belt, blade, and idler assemblies
Walk-Behind & Specialty Equipment
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21″ commercial and Kawasaki self-propelled mowers
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Hydraulic-lift deck systems
This part spans multiple serial number ranges and is used anywhere Ariens or Gravely parts lists specify a .25 × .75 × .25 straight key.
Why Use Genuine OEM 06605500
Using the OEM 06605500 Ariens / Gravely key ensures:
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Exact keyway fit and alignment
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Proper torque transfer with no play
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Reduced wear on shafts and pulleys
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Long service life under heavy load
This straight key delivers factory-correct fit, strength, and reliability, making it the correct replacement choice for Ariens and Gravely mower deck and drive systems.
