The Rawlings rotor is designed to maximize inertia while minimizing its weight. With the increase of inertia our machine runs at lower RPM’S than our competitor’s machines and half the speed of conventional hammer mills resulting in overall savings of electricity and maintenance costs. The cam profile of the Rawlings rotor prevent feed surges by keeping material closer to the cutting edge of the bits. This translates to better productivity as the in-feed conveyor is stalled less frequently and less down time as the increased energy reduces the number of motor drive stalls.
The Rawlings Super Hi-Inertia™ Hog provides the crushing and shearing power needed to handle really tough jobs like green waste, cypress, redwood, cedar, black spruce, poplar and a wide range of other stringy and fibrous materials.
Extremely tolerant of contaminants, rocks and metal without catastrophic maintenance costs if metal enters the grinding chamber.
Hammer hogs run at higher RPMs than that of a solid rotary hog. In general hammer hogs contain a plurality of pivoted hammers on the outer rotor dimension. The hammers pulverize the material against an anvil. The rotor is light and the hammers are heavy. The rotor tends to be difficult to start because the pivoted hammers hang towards the bottom of the machine. Bearing wear is high and maintenance is excessive. The hammer hog is also unsuitable to handle contaminants without extensive catastrophic damage once they enter the grinding chamber.
“Customer Testimonial on Rotor Retrofit of a Universe Hog”
I wanted to share with you a few comments about our recent Rotor Retro-fit to the Rawlings Hi-Inertia Rotor completed in January of this year. Before the change we were having to turn the strikers or resurface every two weeks and completely change out every six weeks. It is now 17 weeks using Rocwear strikers and bits and we have yet to change any parts. That is operating over 85 hours a week or 1445 hours. Friday is maintenance day and it seemed like we were spending 8 hours on maintenance. Now, it’s open it up, inspect, and close it back up. In a test done just before the change, we processed a log about 10″ diameter x 8′ long. It took about 17 seconds to process a mix including unusable sticks up to 20 x 2 ½. After the conversion we processed the same size log through which cleared in 10 seconds with a consistent quality 3 inch minus we’ve maintained everyday since.In the final analysis we successfully:
- Reduced maintenance costs (parts & labor) over 80%
- Satisfied our customers with a consistent 3 inch minus hog fuel
- Eliminated conveying problems
- Reduced or eliminated unnecessary shutdowns