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Description
06611200 – Square Key .250″ × .250″ × 1.00″ RC 40–50 (Genuine OEM Ariens / Gravely)
The 06611200 square key is a genuine OEM Ariens / Gravely hardened steel key used to lock pulleys, hubs, sprockets, and drive components to a keyed shaft. With a Rockwell hardness rating of RC 40–50, this key is designed for higher-load applications where durability and resistance to wear are critical.
Manufactured to Ariens and Gravely factory specifications, this precision square key ensures secure torque transfer and reliable performance in mower deck, PTO, transmission, and ground drive systems.
Key Details
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Manufacturer Part Number: 06611200
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Part Name: Square Key
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Brand: Ariens / Gravely
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Size: 0.250″ × 0.250″ × 1.00″
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Key Type: Square (Straight)
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Hardness: RC 40–50 (Hardened)
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Material: Heat-treated steel
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Function: Prevents rotation between shaft and mounted component
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Installation: Direct OEM replacement
Function
The 06611200 hardened square key fits into matching keyways on the shaft and component, allowing efficient power transfer while resisting deformation under continuous load, vibration, and shock commonly found in commercial mowing equipment.
Applications
Commonly used on Ariens and Gravely equipment in:
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Mower deck drive assemblies
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PTO pulley and clutch systems
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Transmission and ground drive components
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Engine-to-drive power transfer systems
(Exact usage varies by model and serial number.)
Why Use Genuine OEM 06611200
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Correct OEM hardness for high-load applications
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Precision fit prevents slippage and shaft damage
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Improved wear resistance vs. soft keys
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Long service life in commercial-duty equipment
The 06611200 square key is the correct OEM replacement for maintaining factory performance and reliability in Ariens and Gravely mower and drive systems.
