Products ST-120

ST-120

Heavy Duty 10 Foot Flex-wing Brush Cutter

ST-120 Heavy-Duty delivers serious flex-wing performance in a compact 10-foot package. Designed for commercial mowing and property maintenance, it features a reinforced deck and heavy-duty driveline built for tough, continuous use. The flex-wing design follows uneven terrain for a consistent cut, while robust gearboxes provide reliable power for cutting grass and brush up to 4” in diameter. Durable axles, solid rubber tires, and hydraulic wing lift complete a dependable, easy-to-operate solution for demanding mowing conditions

Product Details

Gearboxes

540 RPM or 1,000 RPM Two spindle gearboxes, 250 HP, base mounted, 1:1.6 ratio. One divider box, 275 HP, base mounted. All gearboxes have malleable housings, forged alloy steel, carburized and hardened gears and shafts, tapered and ball bearings. 20 splined 1 3/4″ input shaft, 2 3/8″ output shaft on spindle boxes.

Drive Shafts

Shielded PTOs made from the finest quality propeller shaft materials and needle bearing universal joints. Category 6, Category 5 intermediate, and wing drive shafts.

Slip Clutch

Two heavy-duty clutches with spring type adjustment and four friction discs.

Blades

1/2″ by 4″ material, alloy spring steel, airlift design. Free swinging when encountering obstructions. 8″ overlap for better cutting. Bladetip speed: 16,768 FPM.

Tires

Five solid rubber tires standard. Independent shock absorbing system for all-wheel axles. Optional: 25” Treaded Laminate, Used Aircraft, or Used Foam-Filled Aircraft

Dimensions

Cutting width: 10′. Overall width: 140″. Overall length: 167″. Transportation width: 80″. Cutting height for aircraft 2″ to 17″.

Transportation width:

88''

Weight

Approximately 4,600 lbs

Bush-Whacker Special Deck

Bush-Whacker Special Deck features a primary (bottom) deck of 7 gauge steel that is welded to heavy-duty channel structures. The smooth, easy-to-clean top deck is made of 12 gauge steel that protects the inner support frame. The combined deck thickness is .2921.

Hydraulic Adjustments

Hydraulic lift cylinders control raising and lowering of a flexible wing (winch assembly for manual wing lift is optional). Wing may be raised to 88 degrees above horizontal and lowered to 22 degrees below the horizontal cutting plane. Optional: rephasing level lift systems.

Mechanical Linkage

Mechanically linked suspension for single point adjustment. Optional: Ratchet Style

Other Standard Features Include

Replaceable center and full-length wing skid shoes, transport locking bars for each wing, heavy-duty tongue assembly with dual leveling rods, hydraulic hose holder, parking jack for easy hookup, and unhooking from a tractor. Chains: Standard; Double-Row Chain Guards are an option.

The Difference

  • Heavy-duty 3/8″ side skirt with full-length skid shoes

  • Rated to cut up to 4′ diameter brush.

  • Hinges 3″ x 4″ tubing with grease fittings.

  • Hinges – Structural tubing with grease fittings.

  • 8-bolt mounting on gearboxes – bolt-heads are tack-welded to bottom of deck so one person can tighten the nuts or change the gearbox.

Specifications

Cutting Height

2"-15"

Cutting Capacity

4"

Deck Thickness

7 Gauge/12 Gauge

Side Skirt Thickness

3/8"

Divider Gearbox HP

275 HP

Spindle Gearbox HP

250 HP

Blade Size

1/2" x 4"

Bladetip Speed

16,768 FPM

Blade Overlap

8"

Weight

Approximately 4,600 lbs

Safety Deflectors

Chain Guards

Tires

Laminated

Mower Warranty

1 Year Limited

Gearbox Warranty

5 Year Limited

Product Features

Product Features

Specifications

Cutting Height

2"-15"

Cutting Capacity

4"

Deck Thickness

7 Gauge/12 Gauge

Side Skirt Thickness

3/8"

Divider Gearbox HP

275 HP

Spindle Gearbox HP

250 HP

Blade Size

1/2" x 4"

Bladetip Speed

16,768 FPM

Blade Overlap

8"

Weight

Approximately 4,600 lbs

Safety Deflectors

Chain Guards

Tires

Laminated

Mower Warranty

1 Year Limited

Gearbox Warranty

5 Year Limited

Hall Manufacturing provides a limited warranty of one year on any machine or component, and five years on any mechanical gearbox or gearbox component.

This warranty covers defective materials and workmanship on the complete machine. Limitations and exclusions apply.