Skid Steer Rotary Cutter Attachments: Complete Canadian Buying Guide
A rotary cutter is one of the most versatile and cost-effective attachments for skid steer operators who need to manage grass, weeds, light brush, and overgrown vegetation. Simpler than a flail mower, more aggressive than a brush cutter for open ground — here's how to choose the right one for your machine and terrain.
What Is a Rotary Cutter Attachment?
A rotary cutter (also called a brush hog, bush hog, or rotary brush cutter) is a hydraulically driven mowing attachment that mounts to the skid steer's quick-attach plate. It uses one or two large horizontal blades rotating at high speed beneath a protective deck to cut vegetation. Unlike a flail mower's many individual hammers, a rotary cutter uses a small number of large blades — typically 1–3 — that swing freely on pivots so they can fold back on impact and then swing back out.
This design makes rotary cutters fast and efficient for open-ground vegetation work: tall grass, weeds, small saplings, crop residue, and light brush up to 1.5–2 inches in diameter. The tradeoff is projectile risk — a rotary cutter blade strikes debris and can launch rocks or sticks at high velocity. Most rotary cutters have rear discharge guards, but they are not appropriate for work near structures, livestock, or people without proper clearance distance.
For most Canadian operations — roadside mowing, acreage maintenance, municipal parks, and rural property management — a rotary cutter is the workhorse choice. They're less expensive than flail mowers, require less hydraulic flow on many standard-flow models, and have simpler blade replacement. When terrain is rocky or debris-heavy, a flail mower is the safer choice. In clean open ground, the rotary cutter wins on productivity and price.
Rotary cutter vs. flail mower: Rotary cutters are faster and cheaper on clean open ground. Flail mowers are safer around rocks and debris, and produce a finer mulch. If you're regularly mowing ditches, roadsides, or stony fields — consider a flail mower. For clean pasture and acreage work, a rotary cutter is the right tool.
Key Specs to Compare
Blade Configuration
Most rotary cutters use free-swinging blades on pivot pins — typically 2–4 blades per deck. Free-swing blades fold back on rock impact and re-extend, absorbing the shock rather than transmitting it to the motor shaft. Fixed-blade rotary cutters exist but are less common for skid steers. Blade thickness and steel grade affect longevity: look for heat-treated or AR-grade steel blades on commercial-use units.
Working Width
Rotary cutters for skid steers range from 48 inches to 108 inches (9 feet). Width selection should be matched to your machine class and job type:
| Cutting Width | Typical Use | Machine Class |
|---|---|---|
| 48–60 in | Mini skid steers, tight fence lines, small acreages | Mini to compact frame |
| 72 in | Most popular; mid-frame skid steers; general acreage mowing | Mid-frame (S450–S590 class) |
| 84–96 in | Large-frame, high-flow required; commercial clearing | Large-frame (S650–S750 class) |
| 96–108 in | Maximum productivity; high-flow large machines | Large-frame high-flow only |
Hydraulic Flow Requirements
Rotary cutters are more forgiving than flail mowers when it comes to hydraulic requirements. Many standard-flow models in the 60–72 inch range run effectively on 15–25 GPM. Larger high-flow models (84–108 in) require 25–30+ GPM. This means many mid-frame skid steers that don't have high-flow can run a quality 60–72 inch rotary cutter:
| Width | Typical Flow Needed | Notes |
|---|---|---|
| 48–60 in | 15–20 GPM | Standard flow compatible |
| 72 in standard | 15–25 GPM | Most mid-frame machines qualify |
| 72 in high-flow | 25–30 GPM | High-flow recommended for dense brush |
| 84–108 in | 25–35 GPM | High-flow required |
Weight
Rotary cutters for skid steers typically range from 500–1,675 lbs depending on width and construction. An Erskine 60-inch model weighs around 500–700 lbs; 84–96 inch commercial units push 1,200+ lbs. Always confirm the attachment weight fits within your machine's ROC with appropriate margin for slope stability.
Who Is This For?
Rotary cutters make sense for a wide range of operators:
- Farmers and acreage owners doing annual or seasonal mowing of pastures, fields, and fence lines
- Municipal and rural road crews maintaining ditches, right-of-way edges, and roadside vegetation
- Landscaping contractors doing overgrown property cleanup, subdivision clearing, and mowing contracts
- Utility right-of-way maintenance — keeping vegetation clear under power lines and beside pipelines
- Crop producers managing cover crop termination, windrow cleanup, and field margin vegetation
Operator experience requirements are moderate. A rotary cutter is straightforward to run, but new operators should understand the projectile hazard and maintain safe clearance distances. Open deck designs (some brands offer open-front designs for pushing into tall brush) require extra situational awareness about what's under the deck before engagement.
Canadian seasonal note: Prairie operators often use rotary cutters for fall crop residue management and shelter-belt undergrowth control. In BC and Ontario, overgrown acreage and brush line mowing is the most common application. Both are well-served by a quality mid-range 72-inch rotary cutter.
Machine Compatibility
Rotary cutter attachments connect via the universal skid steer quick-attach (SSQA) plate, compatible with all major brands — Bobcat, Case, Caterpillar, John Deere, New Holland, Kubota, Gehl, and others. Points to verify:
- Hydraulic flow: Match the cutter's rated flow range to your machine's aux circuit output. Bobcat's own 72-inch unit, for example, specifies high-flow — not all mid-frame Bobcats have high-flow standard.
- Hydraulic coupler compatibility: Ensure flat-face ISO 16028 couplers match, or that you have the correct adapter — mismatched couplers restrict flow significantly.
- Rated Operating Capacity (ROC): A 72-inch rotary cutter weighs 600–1,000 lbs; check that the attachment + material weight stays within safe limits on your typical working grades.
- Deck ground clearance: Some rotary cutter decks sit low and can scalp uneven ground. Check that the deck height is appropriate for your terrain.
Brand Overview
| Brand | Origin | Common Widths | Positioning | Canadian Context |
|---|---|---|---|---|
| Erskine Attachments | USA (Canadian dealer coverage) | 60–72 in | Quality mid-range; agricultural focus | Widely available through Canadian equipment dealers; strong reputation for build quality |
| Bobcat | USA / OEM | 60–96 in | OEM-quality; dealer-backed | Full Bobcat dealer network in Canada; premium pricing but seamless machine integration |
| John Deere | USA / OEM | 60–108 in (RC series) | OEM-quality; broad width range | Full John Deere dealer network; RC series has wide width coverage including 108 in |
| Gehl | USA | 72 in | Mid-range OEM | Available through Gehl/Manitou dealers in Canada |
| Loftness | USA | 48–96 in (BV series) | High-quality US brand; commercial to agricultural | Available through specialty dealers; BV series covers a wide range of widths |
| Baumalight | Kelowna, BC | 48–72 in (RC series) | Canadian-built quality | Domestic parts, warranty support, and dealer network; solid choice for Canadian buyers |
Buying Checklist
- Confirm your machine's hydraulic flow output — standard vs. high-flow determines which models you can run; don't assume high-flow is standard on your machine
- Match cutting width to machine frame and terrain — oversizing reduces machine stability and maneuverability in tight areas
- Ask about blade replacement cost and availability in Canada — blades are wear items; import-only parts cost you time and money when they're needed mid-season
- Check the discharge guard setup — rear guards and side skirts affect safe operating distance; open-front designs need more operator awareness
- Verify deck construction gauge — light-gauge decks dent and crack more readily; commercial applications warrant 7-gauge or heavier steel construction
- Review the gearbox or hydraulic motor design — gearbox-driven units need oil changes and are a maintenance point; direct hydraulic motor drive is simpler but still needs coupler inspection
Canadian Pricing Context
Rotary cutter pricing in CAD varies considerably by width, brand, and construction quality:
- Entry-level / import (48–60 in): Lower tier — appropriate for light seasonal mowing; limited support
- Mid-range (60–72 in, quality brands): Mid tier — Erskine, Baumalight, Loftness, Blue Diamond; best value for regular use in Canadian conditions
- OEM / commercial-grade (72–96 in): Upper tier — Bobcat, John Deere factory attachments; highest integration but premium pricing
Rotary cutters are more commonly available for short-term rental than flail mowers. Check Sunbelt Rentals, BET (Battlefield Equipment/Toromont), and local equipment dealers. For seasonal or recurring mowing work, ownership typically pays off within one to two seasons versus regular rental.
Safety reminder: Rotary cutters are high-projectile-risk attachments. Before mowing any new area, walk the ground to identify hidden debris, rocks, fence wire, and other objects. Never operate with people or animals within 100 feet of the discharge zone. This is especially relevant on Canadian acreages where old fence wire and post remnants are common.