Engineered to Outperform. Built to Endure.

RF420 20’ FLEX-WING ROTARY CUTTER

Engineered to Outperform. Built to Endure

Engineered for operators who demand more from every pass, the New Rhino RF420 20’ Flex-Wing delivers uncompromising performance, durability, and control across the toughest mowing conditions. Built to dominate everything from dense pasture grasses to heavy brush, the RF420 combines a wide 20-foot cutting swath with a rugged, heavy-duty design that thrives in high-acreage applications. Its reinforced deck structure and high-capacity drivetrain are designed to power through thick material with confidence, minimizing downtime and maximizing productivity. The RF420’s advanced suspension and axle system contain 10 custom isolators to smooth out rough terrain, maintaining consistent cutting height while reducing stress on both tractor and operator. Whether clearing uneven fields, roadsides, or row crop residue, this flex-wing adapts seamlessly delivering a clean, even cut mile after mile. Operator-focused features make a long day in the field easier. From simplified height adjustments and quick-service blade changes to an efficient hitching system, the RF420 is designed to keep you working, not wrenching. The RF420 can be equipped as a 540RPM or 1,000RPM, with three tire selections, Single or Double Row Chains, and optional Walking Axles. And backed by Rhino’s reputation for rugged reliability, it’s a machine built not just to perform—but to endure. The Rhino RF420 — When the job is bigger, tougher, and more demanding, step up to the Flex-Wing built to handle it.

Features and Benefits

  • Heavy Cutting Capability – Cuts thick grass and brush up to 4 inches in diameter
  • Durability & Structure – Reinforced 7-gauge decks, gusseted gearbox stands, and heavy bracing for long-term structural integrity
  • Ride Quality & Terrain Handling – Advanced axle design with 10-point suspension reduces shock loads and improves operator comfort
  • Ease of Use & Serviceability – Features like Serviceable trunnions, EZ-adjust leveling, EZ-change Hex-Head blade bolts and hardened bushings
  • Warranty Confidence – 10-Year Gearbox Limited Warranty and a complete 2-Year Machine Limited Warranty

Who Should Buy

  • Large Acreage Agricultural Farmers
  • Roadside Mowing Contractors
  • Government and Municipal Mowing Operations

Warranty

Industry-leading toughness. Industry-leading warranty.

Rhino products are built to take on whatever you can throw at them. But if something should break, you’ll be glad to know our warranties are just as strong. See your local Rhino dealer for complete details.

Full Machine Warranty

1

Year

Limited Gearbox Warranty

10

Years

Gearbox Seal Warranty

2

Years

Limited Driveline Warranty

2

Years

Specifications

RF420
Cutting Width20'
Transport Width116''
Transport Height100''
Overall Width247''
Overall Length237''
Cutting Height *1 1/2'' - 16''
Height AdjustmentHydraulic Cylinder
Jack StandStandard
HitchPull
Blade CarrierInfinity - Cast
Blades1/2'' x 4''
Blade Overlap6''
HP Required90 PTO
Gearbox Rating - Divider **250 HP
Gearbox Rating - Center & Wing **225 HP
Gearbox Oil (85W-140)Factory Filled
Output Shaft Diameter3''
Blade Tip Speed (FPM) - 540 RPMApprox. 15,750
Cut Capacity (Max)3''
Driveline SizeCAT 6 CV Main/Cat 5 Wing
Driveline ProtectionSlip Clutch
Deck Thickness7 Ga. Top/Bottom
Side Skirt1/4” x 12”
Tire and Wheel OptionLaminated, Pneumatic, Foam Filled
Wing Lift HydraulicsStandard
Wing Flex (Degrees)90° Up/22° Down
Deck RingsStandard
Safety Tow ChainStandard
Safety DeflectorSingle or Double Chain Guards
LED Light KitStandard
Weight (Approx)7,600 lbs
ManualsRF420 Manuals
* Cutting height dependent on tire size.
** Gearbox ratings based on field performance.

Financing

Check Out Great Financing Options From Rhino

It's never been easier to own a Rhino with retail financing plans through participating U.S. dealers. Contact your local Rhino dealer for details.

See All Financing Options
0

%APR

For 24 Months

0% APR financing for 24 months on all new RhinoAg Flex-Wings, Single Spindles, and Multi-Spindles. Minimum amount financed is $3,500 or more. See dealer for full details.