Bush Hog® 5115 Flex-Wing Rotary Cutter

New Extreme-Duty 15' Flex-Wing

Building upon the success of our legendary Heavy-Duty Flex-Wing lineup, the New 5115 Flex-Wing is built for the harshest cutting conditions. Designed to cut heavy grasses and brush up to 5” in diameter, these New 15’ Flex-Wings are serious machines for serious users. Perfectly at home maintaining rights-of-way and roadsides or long days clipping the back “400”, these cutters get the job done in any environment, day in and day out. New performance and convenience features like seriously upgraded axles, EZ-change blade bolts, 3/4″ Uplift Blade Carriers, and EZ-adjust leveling rods make your life easier and worry-free. Our new and improved axles glide over obstacles, while significantly reducing shock loads for an improvement you can see and feel in the tractor seat. Heavily-braced, 1/4″ smooth-top decks shed debris and water for easier cleanup. Extreme-Duty gearbox stands are thicker, braced and gusseted to withstand the harshest cutting environments. Our Perma-Level+ Hitch has received additional reinforcements and quality of life features like rollover and clevis stops for easier tractor hookups. Standard equipment includes convenience features like EZ-lube drivelines, increased tongue transport height, and hydraulic hose handles to reduce hand-slipping and improve ergonomics. Then when not in use, the hoses can be safely stored in the holder on the tongue.

The New 5115 15’ Flex-Wing comes standard with distribution-improving Deck Rings and Double Row Chains for added safety. It can be configured with 540 or 1,000 PTO Driveline, Center Dual or Walking Tandem Axles, Wing Single, Dual, or Walking Tandem Axles, Laminated, Air-Filled, or Foam-Filled Tires, and 2 Hoses for simultaneous wing lift or 3 hoses for independent wing lift. And as with all Bush Hog® Rotary Cutters, the New 5115 Extreme-Duty Flex-Wing comes with the industry’s only 10-Year Gearbox Limited Warranty. To stand behind our product even further, the 5115 carries the industry’s first and only 3-Year Machine Limited Warranty. This cutter is built to last! That’s why our customers say, “If it doesn’t say Bush Hog®, it just won’t cut it.”

Notes: Unit(s) shown equipped with certain selections and options; please consult with your local Bush Hog dealer for all available configurations.

Performance Features

  • New Patent-Pending axle suspension reduces g-force shock loads by 51%
  • Replaceable 1/2″ Cast Wing Skids for extended wear during heavy ground contact
  • Angled rear deck section with 41% longer skids improves durability during side and backward impacts
  • New durable Cast Leveling Rod Cams make adjusting deck pitch easier
  • New Cast Walking Tandem Axles walk over the most rugged terrain instead of bounce through it
  • Center section axle spindles are centered on the axle arm for equalized loading of vertical forces
  • Grease fittings and spring steel bushings at axle pivot points for longer life
  • Wing decks free float 22° down and 45° up without engaging the hydraulic cylinder for longer cylinder life
  • Wing axles are adjustable 20″ left to right for variable row crop spacings
  • New Rollover and Clevis Stops on the Perma-Level+ Hitch make tractor hookups easier
  • Increased Cutting and Transport Height by 2″ to mow down taller vegetation and easier loading on trailers
  • New Blade Carrier creates more uplift of grasses providing a cleaner cut of material

Construction Features

  • Industry first — 3″ O.D. output shaft in cutting gearboxes
  • Smooth-top 1/4″ deck plates are heavily-reinforced for years of trouble-free service
  • 33% stronger gearbox mount and stand are built to withstand years of punishing mowing conditions
  • 3/4″ blade carriers come standard with Hardened Hex-Head Blade Bolts and Bushings for easy blade changes
  • 194% increase in axle arm section for substantially improved strength
  • ASAE Cat 6 Input Drivelines and ASAE Cat 5 Wing Drivelines for use in extreme cutting conditions
  • Grease fittings in our E-Z lube drivelines align for reduced service times
  • Patented oil sight windows make for quick and easy oil level checks
  • Large, replaceable skids behind the tongue and under the hinge rails protect deck structure from ground contact

Safety Features

  • Double Row Chains to safely knock down flying debris
  • New Cast Transport Lock supports the cutter while transporting
  • Wing locks hold the wings stable when in an upright position
  • Rollover and Clevis Stops reduce rotating and swinging hitch components while attaching to tractor drawbar/li>
  • 360° coverage around rotating drivelines
  • LED safety lighting standard

Product Features

Reinforced axle tube with custom rubber isolator bank on the center axle absorbs damaging shock loads before going through the deck and eventually to the tractor

The New 5115 has substantial structural framework with Hex-Shaped Deck Rings to add stiffness to and protect the deck structure while distributing clippings more evenly

New Cast Walking Tandem Axle selection strolls over rough terrain with ease

Axle Arms increased from 5.25″ x 6.5″ welded channel to 6″ x 8″ structural tube for superior strength in this high-stress area

Optional Gauge Wheels help support the wing decks from bouncing while rolling over obstacles


Custom-tuned rubber isolator pads absorb shock at each axle

1/4″ x 13″ sidebands are protected by 1/2″ replaceable cast skids and extended front to back built-in skids

5″ blades are mounted on a 3/4″ carrier with hardened hex-head blade bolts and bushings making blade changes quick and easy

Leveling the deck is made easy with our new cam adjuster

Good for Tractors rated 40hp or under


Cutting Width
Cutting Height
1 1/2″ – 16″
Cutting Capacity
Transport Width*
8′ 2″
Transport Height**
7′ 3″
Transport Length***
15′ 3″
Approximate Weight (lb.)
Approximate Tongue Weight (lb.)
Minimum Tractor PTO HP
“Perma-Level+” or 2-5/16″ Ball Hitch
Center Deck
Wing Decks
Wing Cutting Angles
22° Down and 45° Up
Wing Level Adjustment
1/4″ x 13 1/2″
Transfer Gearbox (HP)
Cutting Gearboxes (HP)
Input Driveline
Category 6
Wing Drivelines
Category 5
Blade Holder
3/4″ Uplift
1/2″ x 5″
Blade Tip Speed (fpm)
Axle Suspension
Isolators @ Each Axle + Center Isolator Bank
Center & Wing Hydraulics
2 or 3 Hose Selection
Safety Tow Chain
Distribution Baffles
Gauge Wheels
PTO Driveline Support
10-Year Gearbox Limited Warranty
3-Year Machine Limited Warranty


*Measured from Wing Skid to Wing Skid when Folded


**Measured at Maximum Transport Height


***Measured from hitch tip to rear of 21″ Laminated Tire




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