4 Pack HD Switch C3 Type Design Blade Spindle Bearings for Toro TimeCutter 100-1048 112-0423 109966 38-7820 Includes HIGH Temp Grease & C3 Upgrade

What It Is

This is a 4-pack of heavy-duty blade spindle bearings designed for Toro TimeCutter zero-turn mowers. They replace worn bearings that cause blade vibration, uneven cutting, or spindle noise, and include high-temp grease and a C3 internal clearance upgrade for higher load tolerance.

Fitment & Compatibility

• Exact OEM replacements: Fits Toro part numbers 100-1048, 112-0423, 109966, and 38-7820.
• Deck sizes: Works on 42", 44", 50", and 54" TimeCutter decks (check your deck model number—these fit most TimeCutter models, but not all).
• What to measure: Bearing bore is 1" (25.4mm) ID, outer diameter is 2.047" (52mm), width is 0.75" (19mm). Confirm these match your spindle assembly.
• Watch out: Not for Toro TimeCutter 30" or 34" decks, or for older Toro models like Z-Master or Titan (different spindle designs).
• Aftermarket note: These are aftermarket, not OEM Toro, but use C3-rated bearings (higher clearance for heat expansion) and include grease—good value if fitment checks out.

Key Things to Know

• Installation difficulty: Moderate. You’ll need a socket set, possibly a puller for stubborn bearings, and a torque wrench (spindle nut spec is ~40-50 ft-lbs). Grease the new bearings before install.
• C3 upgrade matters: Standard bearings can fail faster under heat. C3 clearance reduces friction at high RPM—worth it for heavy-use mowers.
• Common gotcha: If your spindle housing is worn or bent, new bearings won’t fix vibration. Inspect spindle shaft and housing before swapping.
• 4-pack value: Most TimeCutter decks have 3 spindles, so you get a spare; if you have a 4-spindle model (rare), this covers it. No need to buy individually.

Should You Buy It

Yes, if you own a Toro TimeCutter with a 42-54" deck and need a cost-effective bearing replacement. The C3 upgrade and included grease make it a smarter buy than cheap no-name bearings, but skip it if your spindle housing is damaged or you prefer OEM parts (these are aftermarket). For DIY maintenance, it’s a solid value at $8.45.