Grinderpedia is your source for all things horizontal grinders, recyclers, and hammer hogs. Get the low-down on industry terminology, colloquialisms, and learn the ins-and-outs of Peterson’s industry-leading machines. Grinderpedia is your source for What You Need to Know.
Asphalt Shingle Grinding (ASG) is the process of producing Recycled Asphalt Shingles (RAS) by processing asphalt roofing shingles to a small spec, generally under 3/8” (9.525 mm) to salvage the valuable asphalt and sand. Grinding asphalt shingles is a recycling effort which diverts materials from the landfill and can reduce road building costs.
Peterson’s ASG Breaker Grate is a type of anvil breaker grate used specifically for asphalt shingle grinding.
Contaminated material is unwanted content in the feedstock material. Using feedstock with contaminates means a lower quality finished product containing contaminated materials. This unwanted content may including rocks, dirt, tramp metal, and plastic. All of these materials can cause problems with the finished material, such as plastic in compost.
Waste wood such as railroad ties and pallets often have unwanted metal and nails.
Contaminates may also cause additional wear to grinder machine parts.
All Peterson tracked machines come standard with triple grouser track shoes. Track shoes are what gives a machine the traction in mud, snow, and other soil conditions to move easily. Shoe styles range from rubber for indoor and pavement, to heavy duty for rocky ground. Different shoes perform best in different conditions.
Triple grouser track shoes are suitable for soft and hard ground while providing maneuverability. The grouser teeth (perpendicular protrusions) are shallow and spaced fairly close together as opposed to single grouser track shoes–providing more flotation above the surface. This means less ruts and washboarding.
Single and double grouser track shoes are available as an option on most tracked Peterson machines.
A hammermill is a general term referencing grinders as a mill that hammers material into small pieces. The word hammermill can be used in reference to the whole machine, or alternately, just the rotor and hammers.
Hardfaced refers to an abrasion resistant weld wire which is applied (welded) onto machine parts. The hard face reinforces the metal part and prevents premature wear when grinding in a highly abrasive environment.
A High Tip Bucket is an attachment that is used on a wheel loader which allows for increased dump height i.e. for loading high sided vehicles. High Tip Buckets are ideal for loading Peterson horizontal grinders or blower trucks or trailers with mulch or compost material.
Land clearing generally consists of trees, limbs and roots cleared from forested or partially forested land that will be used for a new purpose including farming, commercial development, or right-of-ways. Most land clearing is near urban areas. On larger areas with access, trees may be logged for lumber or pulp chips that provide a higher value than recycling.
The ground material that is produced by Peterson horizontal grinders can offer more value if it is free of metal debris such as nails, bolts, and other ferrous hardware. Metal Recovery is pulling scrap metal from the debris stream with an optional cross belt magnet, or the optional magnetic head pulley and can be collected in a separate container or the metal collection box attached to the machine.
Metal recovery can provide an additional revenue stream as well.
Sometimes referred to as Reclaimed Asphalt Shingles (RAS); Recycled Asphalt Shingles are the byproduct of Asphalt Shingle Grinding. This is done by processing asphalt roofing shingles down to a smaller spec, usually 3/8”, in an effort to use recycled asphalt material in roadways, resulting in reduced road building costs and can lower amounts of material sent to a landfill. Adding RAS to the mix displaces some of the expensive virgin asphalt, saving costs on roads, parking lots, etc.
In most cases, a two-pass grinding process is more economical than a one-pass grinding process. When finished product sizing is critical for things like mulch and compost a two-pass regrind is optimal. Pregrinding material on the first pass for feedstock reduction with large-holed hex grates, and regrinding material for sizing with small-holed round grates offers faster production, lower fuel consumption, and a more consistent end product.
Peterson grinders are extremely productive and are often limited by the loading capacity. A rotating grapple can be much more productive loading a grinder or chipper compared to a fixed grapple which will speed up the overall production.
A Rotating Grapple is mounted to the arm of an excavator (or other boom-based loader) and allows the operator up to 360-degrees of rotation while loading a machine. This is very useful when loading odd sized materials (such as brushy tops) or when the loader is sitting off to the side of the machine. The operator can rotate the material to the correct feed angle to allow as seamless of feeding as possible.
An undesirable, odd sized material that pass through the grates with minimal size reduction. Peterson machines are less likely to have spearing occurrences due to the up-turn rotor and three-stage grinding process.