Stens replacement mower spindle assembly 6.7/8" - fits Ariens & Gravely, heavy-duty with mounting bolts

This spindle assembly is engineered by Stens' OEM supplier to match original equipment dimensions and function. It replaces several Ariens and Gravely part numbers and arrives with the mounting bolts you need for a direct fit. Backed by a one-year warranty, the unit is intended to return worn or damaged cutting decks to reliable operation without extensive fabrication or modification.

How will this spindle assembly fit my mower deck?

The Stens 285-300 is sized at 6 7/8 inches and built to the same mounting pattern as the listed OEM parts, allowing bolt-on replacement for many Ariens and Gravely decks. Always compare your old spindle's dimensions and bolt-hole spacing with the new part before installation.

• Direct replacement for Ariens and Gravely OEM numbers listed in product details.
• Includes required mounting bolts for most standard installations.
• 6 7/8" overall dimension to match original assemblies.
• Designed for zero-turn mowers and compatible tow-behind lawn sweeper machines.

What performance improvements can I expect after installing it?

Installing a new spindle assembly removes play and worn bearings that cause uneven cutting, vibration, and premature blade wear. With the bearings and housing renewed, blades spin truer and the deck cuts cleaner over repeated passes.

• Reduced vibration for a steadier cut and less deck wear.
• Improved blade balance and consistent grass height across the deck.
• OEM-quality materials intended to match original durability.

How difficult is installation and what comes in the box?

Installation is straightforward for anyone comfortable removing a blade and working under the deck. The assembly ships with the mounting bolts needed for most replacements; you'll still need basic hand tools, a torque wrench, and safety supports for the mower.

• Includes spindle assembly plus mounting bolts for proper replacement.
• Requires blade removal and secure jack/stands for safe access.
• Typical install time: 30–90 minutes depending on experience and mower model.

What warranty and support does Stens provide?

This part is covered by a one-year warranty from the date of purchase. If the product arrives defective or fails under normal use within that period, Stens will replace it according to their warranty terms.

• One-year replacement warranty from Stens.
• Contact Stens support for help confirming fitment or troubleshooting post-install issues.
• Trusted by professional dealers for OEM-quality repairs.

Who is this for: The Stens 285-300 spindle assembly is aimed at owners and maintenance technicians of Ariens and Gravely zero-turn mowers or compatible tow-behind sweepers who need a reliable, OEM-matching replacement. It suits homeowners restoring a deck for cleaner cuts, landscape professionals replacing worn spindle units quickly, and DIY mechanics who prefer parts that include mounting hardware and a warranty for peace of mind.