Bear Iron Works Koala Grizzly Rock Screen for Yard Tractors & Ride-On Skid Steers

The Bear Iron Works Koala Grizzly Rock Screen is a compact material-screening solution designed for smaller yard tractors, ride-on skid steers, landscapers, property-maintenance crews, farms, and lighter-duty screening applications.

With a 60-inch internal width and approximately 425 lb operating weight, the Koala gives operators of smaller equipment a practical way to separate rocks, debris, and oversized material from usable soil without stepping up to a larger contractor-size Grizzly. Bear identifies machines such as the Bobcat MT100 and compact tractors in approximately the 16.6–24.8 HP range as representative equipment for this model.

Like Bear Iron Works' larger Grizzly screens, the Koala uses solid steel screening rails and a fixed-angle design intended to allow material to move down the screen while smaller material falls through. It is suitable for garden soil, landscape rock cleaning, property maintenance, agricultural material, and general debris separation.

The base Koala is available with 3-inch, 4-inch, 5-inch, or 6-inch rail spacing. Contractors needing finer finished material can pair it with Bear Iron Works' removable screen system for more precise screening.

Which model should you choose?

Koala: Choose the Koala for small yard tractors, ride-on skid steers, tight jobsites, landscaping, farms, and lower-volume screening applications.

Growler: Step up to the Growler for compact skid steers and utility tractors in roughly the 25–50 HP range.

Cub: Best for standard-size skid steers and professional contractor screening.

Mama: Designed for backhoes, larger tractors, and heavier construction applications.

Papa: Built for full-size loaders, heavy civil, quarry, mining, and high-volume aggregate screening.

Features

• Designed for Compact Equipment: Built around smaller yard tractors and ride-on skid steers.
• 60-Inch Internal Width: Provides a practical screening area while remaining manageable with compact equipment.
• Lightweight Grizzly Design: Approximately 425 lbs, making it the lightest standard Grizzly in the Bear Iron Works lineup.
• Solid Steel Screening Rails: Designed for greater durability and resistance to deformation during repeated material screening.
• Multiple Screen Spacings: Available with 3-inch, 4-inch, 5-inch, or 6-inch standard rail spacing.
• Optional Fine Screening: Compatible with Bear Iron Works removable screens for more precise particle sizing.
• Optional Vibrator System: A vibrator can be added for applications involving wet, sticky, or fine material.
• Compact Jobsite Footprint: Well suited to landscaping, residential work, farms, and locations where larger screening equipment is impractical.
• Versatile Material Screening: Suitable for soil, landscaping rock, gravel, debris, manure, garden material, and other bulk materials.
• No Separate Power Source Required: Screening is performed using gravity and the operator's existing equipment.
• Equipment-Assisted Mobility: Can be repositioned around the work area using compatible equipment.
• Expandable Configuration: Available with factory options including removable screens, wings, bang bars, upgraded rails, and other accessories.

Package Includes

• 1 × Bear Iron Works Koala Grizzly Rock Screen
• Selected screen spacing
• Heavy-duty steel frame
• Solid steel screening rails

Removable screen, vibrator, wings, bang bars, D-rings, and other factory upgrades are sold separately unless specifically ordered.

Specifications