121-9107 – Toro Spindle Assembly | Genuine OEM Toro Part The Toro 121-9107 Spindle Assembly is a genuine OEM replacement component designed for use on a wide range of Toro TimeMaster®, TurfMaster®, and eTimeMaster® walk-behind lawn mowers. This spindle assembly supports the mower blade and transfers belt-driven power smoothly and efficiently to ensure consistent cutting performance. Manufactured to exact Toro factory specifications, this spindle assembly helps reduce vibration, maintain proper blade alignment, and extend the life of the cutting deck and bearings. Product Details Manufacturer Part Number: 121-9107 Brand: Toro Part Type: Spindle Assembly System: Cutting Deck / Blade Drive OEM Status: Genuine Toro replacement part Function Supports and rotates the mower blade Transfers belt-driven power from the engine to the blade Maintains correct blade alignment and balance Reduces vibration and uneven cutting Protects the cutting deck from premature wear Compatible Toro Equipment (Common Applications) This spindle assembly is used across many Toro walk-behind mower platforms, including: Toro TimeMaster® Walk-Behind Mowers 30" and 76 cm (TM76) models Common models: 20199, 20200, 21199, 21200, 21219, 21220 Residential and Home Depot rental units Toro TurfMaster® Walk-Behind Mowers 30" and 76 cm commercial models Standard and HDX configurations Toro eTimeMaster® 60V Mowers 30" and 76 cm battery-powered models ⚠️ Due to extensive model and serial-number variations, always confirm compatibility using your mower’s model and serial number before ordering. Installation Notes Complete spindle assembly as supplied Blade, blade bolt, pulley, and belt sold separately unless specified by model Inspect blade adapter, belt, and pulley during installation Torque mounting bolts to Toro factory specifications Signs the Spindle Should Be Replaced Excessive vibration during operation Grinding or whining noises Blade wobble or uneven cutting Bearing failure or seized spindle shaft The Toro 121-9107 Spindle Assembly restores smooth blade operation, clean cutting performance, and long-term reliability for Toro walk-behind mowing equipment.
