120-5236 (4-Pack) Blade Adapter for Toro 30"TimeMaster 20199 20200 Lawnmower Replace Parts

What It Is

This 4-pack of blade adapters (part 120-5236) is a direct replacement for the center mounting hub on Toro 30-inch TimeMaster mower decks, securing the blade to the crankshaft. Designed for commercial-duty residential mowing, it ensures proper blade alignment and torque transfer during cutting.

Fitment & Compatibility

Before buying, verify your mower’s model number—this adapter fits Toro TimeMaster 20199 and 20200 models with 30-inch decks. Measure the crankshaft diameter (must be 1 inch) and the center hole of your current adapter (should match 120-5236). OEM part number 120-5236 is identical to the original; aftermarket versions may vary in metal hardness. Not compatible with standard 21-inch or 22-inch Toro walk-behinds—only the 30-inch TimeMaster series.

Key Things to Know

• Check blade bolt torque: Over-tightening can warp the adapter; use 50-60 ft-lbs with a torque wrench.
• Inspect for wear: Replace if the adapter’s splines or keyway are stripped—symptoms include blade wobble or vibration.
• Installation difficulty: Easy (10-15 minutes) with a socket wrench and blade removal tool; no special skills required.
• Durability: OEM-grade cast iron resists bending better than some aftermarket steel adapters.

Should You Buy It

Yes, if you own a Toro TimeMaster 20199 or 20200 and notice blade looseness, vibration, or uneven cut. This 4-pack is a cost-effective OEM-spec solution for routine maintenance—buy it to avoid crankshaft damage from a worn adapter.