Vibrating Grizzly Feeders

Vibrating Grizzly Feeders are engineered to combine the functions of feeding and scalping into one unit, reducing the cost of having two separate units. They are mainly used in a primary applications feeding a primary crusher.


The main purpose of a Vibrating Grizzly Feeder is to feed a primary crusher in a primary application. Vibrating Grizzly Feeders reduce the amount of material going into the crusher by scalping out the product size ahead of the crusher. This reduces the size of the primary crusher required.

The Vibrating Grizzly Feeder provides a continuous feed rate under a variety of loading and material conditions. Vibrating Grizzly Feeders are designed to take heavy shock loads from trucks, shovels and loaders. This type of feeder can be used in quarries, recycling, industrial processing, mining, and sand and gravel operations, as well as in a wide range of processing industries

Vibrating Grizzly Feeders can be used in rip-rap plant applications to sort ROM material for use on dams, water control and decorative stone applications; for sorting gravel in dredge applications for sized decorative landscaping applications;  to scalp roots out of dirt and other materials to improve the product value for a customer; or to spread material from a conveyor to a wider secondary crusher, such as a Roll Crusher, where no grizzly section is required.

How Vibrating Grizzly Feeders Work

The Vibrating Grizzly Feeder consists of a pan section at the feed end to receive and start segregating the material. The discharge end consists of a grizzly section with openings that allow the undersized material to pass before discharging into the crusher. The feeder is mounted on springs and vibrated via a mechanism located underneath the feeder pan, protecting it from misfed material that fails to reach the feed hopper. The vibration force is angled to the feeder, pointing toward the discharge end. This action of the vibrator forces the material toward the discharge end while segregating the material, causing the finer particles to move toward the bottom of the load.

As the material travels to the grizzly section, the finer material settles to the bottom and passes through the openings in the grizzly. This bypassed material decreases the amount of material going into the crusher, reducing the size of the crusher required as well as the wear inside the crusher. The bypassed material can be combined with the material going through the crusher on the under conveyor. This prescreened material protects the under conveyor from the impact of the material exiting the crusher. The prescreened material can be segregated as a product, or it can be discarded if the fines in the material are a contaminate.

Why McLanahan Vibrating Grizzly Feeders

The McLanahan Vibrating Grizzly Feeder has a history of reliability and durability. McLanahan offers feeders in five different widths to match up to the crusher opening width. For example, McLanahan designs feeders with shallower sides for use in portable plants where over plant height is limited. We also design feeders with deeper sides for stationary applications where large haul trucks are dominantly used. Unlike many manufacturers of Vibrating Grizzly Feeders, McLanahan is enthusiastic to work with customers on applications that require special features not offered by our competitors.

Frequently Asked Questions About Vibrating Grizzly Feeders

Ask An Expert

Vibrating Grizzly Feeders can be customized to meet specific customer requests. Please contact McLanahan for any special applications. 

Yes, Vibrating Grizzly Feeders can be used in other applications. Please contact McLanahan with your application.

Different stroke angles are available on a Vibrating Grizzly Feeder to match the capacity of the crusher, a slower feed rate is generally required for a Jaw Crusher and a faster feed rate is generally required for an Impact Crusher.

The width of the Vibrating Grizzly Feeder is matched to the width of the crusher in order to feed the crusher properly and spread the material evenly across the width of the crusher.

Yes, the speed of the vibrator on a Vibrating Grizzly Feeder can be changed with the use of a variable frequency controller. A minimum and maximum rpm is allowed. 

Vibrating Grizzly Feeders reduce the amount of material going into the crusher by scalping out the product size ahead of the crusher.

Features & Benefits
  • Adjustable grizzly bar spacing to complement various crusher settings
  • Grizzly bars feature tapered spacing to promote self-cleaning
  • Dual shaft mechanism timed to provide an aggressive linear stroke
  • Adjustable timing to change the angle of linear stroke to match the crusher feed rate
  • Eccentric shafts ride on large anti-friction bearings lubricated with positive oil mist on the gear side and grease lube on the drive side
  • Abrasion-resistant pan liners have counter-sunk bolts to ensure a smooth flow of material
  • A variety of liner materials are available
  • Customized grizzly sections, including punch plate, fabricated bars and rubber media
  • Allows for smaller, less expensive crushers to be selected by scalping out the undersize from the feed

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Our customer service team is here to help you 24/7. We can ship you parts, send field service technicians to your site and answer any questions you have. Whatever you need, we are here for you.