Copperhead Set of 6 Mulching Blades 18" X 5/8" - Compatible with: Scag A48108, 48108, 481707, 481711, 48185, 482467, 482878and More

What It Is

This is a set of six 18-inch mulching blades from Copperhead, designed for high-end zero-turn mowers (primarily Scag) that use a 5/8-inch center hole. Their purpose is to cut grass clippings into fine particles that decompose quickly, reducing the need for bagging.

Fitment & Compatibility

Before buying, confirm these three things:

• Deck size: These are 18" blades. Measure your existing blade length end-to-end; if it’s not exactly 18", these won’t fit.
• Center hole: 5/8" diameter. Measure yours with a ruler or caliper—common alternatives are 7/8" or 1".
• OEM cross-reference: Listed as compatible with Scag part numbers A48108, 48108, 481707, 481711, 48185, 482467, 482878, and more. Check your mower’s manual or existing blade part number against that list. Copperhead is an aftermarket brand, not OEM, so fitment on non-Scag decks (e.g., some Bob-Cat, Ferris, or Grasshopper models) is possible but not guaranteed—verify by measuring.

Practical check: Remove one blade and compare the hole size, length, and overall shape (especially the sail height) to these. If your deck uses a different blade offset or thickness, these may not spin freely or cut properly.

Key Things to Know

• Quality: Copperhead blades are known for good heat-treated steel and a balanced design. They’re not the cheapest, but reviews (4.9 stars) suggest consistent sharpness and durability.
• Installation: Straightforward—use a torque wrench to tighten the blade bolt to your mower’s spec (typically 70–90 ft-lbs). The set includes six blades, so you can replace all at once.
• Gotcha: Mulching blades have a higher lift/sail design than standard blades. If your deck is not designed for mulching (e.g., lacks a mulching baffle kit), these may cause clumping or poor discharge. Check your deck’s airflow design before committing.
• Sharpening: These can be sharpened once or twice, but because they’re mulching blades, the edge angle is more critical—don’t grind them too aggressively.

Should You Buy It

If you own a Scag zero-turn with an 18-inch blade deck and want a reliable aftermarket mulching upgrade that doesn’t break the bank, this set is a strong choice. It’s ideal for homeowners or commercial operators who mow frequently and want finer clippings without switching to a dedicated mulching deck. Skip it if your deck doesn’t support mulching or if you need a low-lift blade for bagging.