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Description
05408000 – BRG-BALL .500″ × 1.38″ × .437″ (OEM Ariens / Gravely)
The 05408000 ball bearing is a genuine OEM Ariens/Gravely bearing used in multiple mower and edger assemblies where a compact, smooth-rolling bearing is required. It’s commonly found in friction wheel / wheel-drive systems on select 21" walk-behind models, and also appears in various idler, sheave, spindle, and drive-related applications across several Gravely/Ariens product lines.
Product Details
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Part Number: 05408000
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Description: BRG-BALL
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Size: 0.500″ ID × 1.38″ OD × 0.437″ width
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Type: Ball Bearing
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OEM: Genuine Ariens / Gravely replacement part
Common Symptoms of a Worn Bearing
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Squealing or grinding noise during operation
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Rough or stiff rotation in drive components
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Excess vibration or inconsistent drive engagement
Where Used (Examples)
Used on (but not limited to) the following applications you listed:
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Ariens/Gravely Pro 21 / LM21 series walk-behind mowers – Friction Wheel & Drive / Wheels & Adjusters
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Lawn Edger models (986102 / 986104) – Spindle, Belt and Guards
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Pro-Walk & Pro-Turn models – appears in pulleys/idlers, hydro/drive, and deck idler systems depending on configuration
Tip: Because this bearing is used across many assemblies, the best way to confirm fit is by matching part number 05408000 to your model and serial range (which you already have listed).
If you want, paste the exact model you’re building the page for (example: 911196, 988171, etc.) and I’ll tailor the description to that machine (walk-behind drive vs. deck idler vs. edger spindle) so the product page reads super accurate.

