2026 Bush-Whacker ST 120 7 Gauge

ST-120

Heavy Duty 10 Foot Flex-wing Brush Cutter

A close relative to the ever-popular ST-180, the ST-120’s smooth-top design is one of the most rugged flex-wing brush cutters on the market today. With it’s 4″ cutting capacity and 250 HP gearbox, you will be hard-pressed to find another mower that can outperform the ST-120 in the field or at the cash register

Features May Include:

• 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. Series 8 Category 6, Category 4 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 and implement tires: 2″ to 17″.

• Transportation width:

88″. for aircraft and implement tires: 2″ to 17″.

• Weight

Without chains and tires: 4,260 lb.
Total weight: 4,980 lb.

• 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.

• 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.