3 Rotary Copperhead Toothed Mulching Mower Blades Fit Toro Timecutter Z 5000 Series 50 Deck 112-9759-03 110-6837-03

What It Is

This is a set of three copperhead-style toothed mulching blades designed for zero-turn mowers, specifically the Toro TimeCutter Z 5000 Series with a 50-inch cutting deck. They replace OEM part numbers 112-9759-03 and 110-6837-03, and their aggressive tooth pattern is meant to chop clippings finer for better mulching and bagging performance.

Fitment & Compatibility

• Deck size: Only for 50-inch Toro TimeCutter Z 5000 Series decks. Will not fit 42-inch or 60-inch decks.
• OEM cross-reference: Direct replacement for Toro parts 112-9759-03 and 110-6837-03. Also fits some older TimeCutter models using those part numbers.
• Measurements before buying: Each blade is 20.5 inches long, 2.5 inches wide, with a 1-inch diameter center hole and a 0.5-inch offset. Verify your existing blades match these dimensions—especially the offset and hole size—to avoid clearance issues.
• Check your deck model: Confirm your mower’s model number (e.g., 74750, 74751) is listed in the compatibility chart. The “Z 5000” label alone isn’t enough; some Z 5000 models use a 54-inch deck instead.

Key Things to Know

• Quality: Copperhead-toothed blades are thicker and harder than standard Toro OEM blades, which reduces bending on rocks or roots but may be slightly heavier. Expect longer life but a small increase in vibration if not balanced.
• Installation difficulty: Moderate. You’ll need a socket wrench and torque wrench (specs: 70-90 ft-lbs). The toothed design makes them harder to sharpen than straight blades—plan to replace rather than resharpen.
• Common gotchas: These blades are for mulching only. If you side-discharge, they may throw clumps due to the fine cut. Also, the copperhead coating wears off over time, revealing bare steel; this is cosmetic, not a defect.
• Balance check: Always balance new blades before mounting. Even a slight imbalance can cause deck vibration and uneven cut.

Should You Buy It

Yes, if you own a Toro TimeCutter Z 5000 with a 50-inch deck and primarily mulch or bag. They’re a durable, well-reviewed upgrade over OEM blades for fine cutting, but skip them if you side-discharge often or want blades you can easily sharpen. At $46, they’re a solid value given the longevity and performance.