MDH-155 Medium Duty 3 Point Offset Flail Mower

Tackle field and roadside mowing with the MDH-155 Flail Mower, designed for 30–40 HP tractors. With a 61″ cutting width, 20″ hydraulic side-shift, and 0.75″–2.95″ height adjustment, it handles turf, weeds, and brush up to 1″ while reaching cleanly past your tractor’s tire tracks.

Built with 1.76 lb forged hammer flails, a Comer gearbox, and an electronically balanced 2200 RPM rotor on SKF bearings, the MDH-155 delivers clean, efficient cuts. The 5.3″ rear roller maintains an even finish, while the belt-tension window and replaceable counter knife simplify maintenance.

PTO shaft included      
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The MDH-155 Middle Duty Flail Mower is built for 30–40 HP tractors with a CAT I (CAT II bushings included) three-point hitch. It offers a 61″ cutting width, 50 cm (20″) hydraulic side-shift, and adjustable cutting height from 0.75″ to 2.95″, making it ideal for maintaining fields, orchards, vineyards, paddocks, and roadside turf up to 1″ brush and ~30″ (75 cm) grass height. The hydraulic offset lets you mow cleanly past the tractor’s tire tracks and work under fences and tree lines without crowding obstacles.

The MDH-155 uses 800 g / 1.76 lb forged, galvanized hammer flails mounted on a 2200 RPM electronically balanced rotor driven by a 3-belt system. A heavy 5.3″-diameter self-cleaning rear roller keeps cut height consistent over uneven terrain. Power is delivered through a Comer gearbox with a 540 RPM PTO (optional 1000 RPM pulley configuration), while the rotor runs on SKF ball bearings with CNC bearing seats for durability and smooth operation.

Service is straightforward: a belt-tension inspection window lets you check belt tension in seconds, and the replaceable counter knife plus front safety flaps improve chopping efficiency while minimizing debris ejection. The mower ships fully assembled in a wooden crate; install the quick-attach CAT-1 hitch (CAT-2 bushings included), connect the single hydraulic circuit for side-shift, fit the safety bars and PTO, and you’re ready to mow ~1.5–3.0 acres/hour depending on conditions.

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Product Manual (PDF)
MDH-Series Product Manual.pdf

Tractor Power

Tractor Power
Optimized for 30–40 HP tractors; CAT I hitch with CAT II bushings included for broader compatibility.

61-inch Cutting Width & Side-Shift

61″ Width + 20″ Side-Shift
61″ working width with 20″ hydraulic side-shift lets you mow outside the tractor’s tire tracks and along fences, buildings, and tree rows.

Forged Hammer Flails

Forged Hammer Flails
1.76 lb (800 g) forged & galvanized hammers mulch grass, weeds, and brush up to 1″ in diameter.

Comer Gearbox & SKF Bearings

Comer Gearbox & SKF Bearings
Reinforced Comer transmission and SKF rotor bearings deliver smooth, long-life performance with minimal maintenance.

Rear Roller Height Control

Rear Roller Height Control
5.3″ self-cleaning rear roller maintains an even cut and sets mowing height from 0.75″–2.95″.

Belt Tension Window & Counter Knife

Service Access & Counter Knife
Belt-tension test window for quick checks; replaceable counter knife and front safety flaps boost chopping efficiency and safety.

Two-Year Warranty

The MDH-155 Middle Duty Flail Mower (SKU: VTI-MDH155) has been rigorously tested to withstand tough conditions and includes a two-year warranty on the machine.
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Parts Guide (PDF)
MDH-155 Parts Guide.pdf

MDH Series Medium Duty Flail Mower hydraulic offset specifications
Technical Data
MDH-155
Dimensions (LxWxH)
72″ x 37″ x 33″
Total weight
778 lb
Cutting width
61″
Adjustable mowing height
0.75″ – 2.95″
Hydraulic side movement
20″ (50 cm)
3-point hitch
CAT I (CAT II bushings included)
PTO shaft speed
540 RPM
PTO shaft length
39″
Working efficiency per hour (approx.)
1.5 – 3.0 acres
Drive system
3-belt system
Tractor engine power recommended
30–40 HP / 22–30 kW
Material strength (flail shaft cover)
0.15″ (4 mm)
Material strength (side walls)
0.23″ (6 mm)
Flail type
Forged steel hammer
Number of flails
22
Weight per flail
1.76 lb (800 g)
Rotor (flail shaft) speed
2200 RPM
Painting
Powder coated
Wooden transport box (LxWxH)
75″ x 41″ x 33″


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MDH-155 Medium Duty 3 Point Offset Flail Mower MDH-155 Medium Duty 3 Point Offset Flail Mower
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Additional information

Weight928 lbs
Dimensions75 × 37 × 33 in
Lift Gate Needed

No Liftgate (-$75), With Liftgate