Rotary 3404 Copperhead High-Lift 18-Inch Lawn Mower Blade
The Rotary 3404 Copperhead High-Lift Lawn Mower Blade is a USA-made, professional-grade replacement blade for select commercial and heavy-duty residential mowers. Its high-lift design increases airflow for efficient bagging and side discharge while helping produce a clean, even cut.
This listing includes one Rotary 3404 blade.
Key Features
- Made in USA: Manufactured in the United States from high-quality steel.
- Copperhead construction: Heat-treated and tempered for durability, impact resistance, and extended edge retention.
- High-lift performance: The aggressive 13/16-inch sail creates strong deck airflow for improved clipping discharge and bagging.
- Commercial-ready design: Built for the demands of zero-turn and walk-behind mowing equipment.
Product Specifications
- Rotary part number: 3404
- SKU: ROT-3404
- Blade length: 18 inches
- Blade width: 2-1/2 inches
- Blade thickness: 0.204 inch
- Center hole: 5/8-inch round
- Sail height: 13/16 inch
- Blade type: Notched high-lift
- Cut direction: Right hand
- Country of manufacture: USA
- Package quantity: One blade
Replaces Select OEM Blade Numbers
- Bad Boy: 038300000
- Encore: 363291
- Ferris: 1521227, 5021227, 5021227S, 5101756
- Gravely: 0450300, 00450300, 03253800, GDU10231
- Great Dane: D18037
- Lesco: 050125
- Scag: 48108, A48108, 481707, 482462, 482878
- Snapper/Kees: 5101756, 5101756SYP
- Toro: 133-2134
- Wright: 71440001
Fitment Guide
The Rotary 3404 may fit your mower when the original OEM blade number, 18-inch blade length, 5/8-inch round center hole, blade width, thickness, and cut direction all match. Do not order by mower brand or deck width alone because manufacturers can use different spindle designs and blades across model years and serial-number ranges.
- Some 36-inch mower decks use two Rotary 3404 blades.
- Some 52-inch mower decks use three Rotary 3404 blades.
Frequently Asked Questions
What are the dimensions of the Rotary 3404 blade?
It measures 18 inches long, 2-1/2 inches wide, and 0.204 inch thick, with a 5/8-inch round center hole.
Is the Rotary 3404 a high-lift blade?
Yes. The Rotary 3404 is a notched high-lift blade with an aggressive sail designed to increase deck airflow for improved bagging and clipping discharge.
Is the Rotary 3404 made in the USA?
Yes. The Rotary 3404 Copperhead blade is manufactured in the USA.
Does the Rotary 3404 replace Scag 481707?
Yes. It is listed as a replacement for Scag 481707. Confirm your original blade number and dimensions before ordering.
What other Scag part numbers does it replace?
It is listed as a replacement for Scag 48108, A48108, 481707, 482462, and 482878.
Will it fit every Scag mower?
No. Scag has used different blade lengths and mounting systems. Verify the OEM number, blade dimensions, and center-hole pattern.
Does it fit a 36-inch mower deck?
Some 36-inch decks use two Rotary 3404 blades, but deck size alone does not confirm fitment.
Does it fit a 52-inch mower deck?
Some 52-inch decks use three Rotary 3404 blades, but always confirm the original part number and mounting specifications.
How many blades are included?
This listing includes one Rotary 3404 blade.
How do I confirm fitment?
Match the OEM blade number and verify the length, width, thickness, 5/8-inch round center hole, blade count, and cut direction.
Installation Reminder
Disconnect the spark-plug wire or battery and secure the mower before removing the existing blade. Install the replacement blade in the orientation specified by the mower manufacturer and tighten the blade bolt to the manufacturer’s recommended torque.