Caroline A Contracting 3248 Soco Rd Waynesville, NC 28786 | 828-400-4444 |  Mon - Fri: 9 - 5, Sat 9 - 2

Tub Grinder For Hire / What is Tub Grinding?

Tub Grinding Service / Tub Grinder For Hire

Seldom does the average person know what we are talking about when we say “tub grinding”.

What is tub grinding? Let’s start by stating what it’s “not” … tub grinding is not a way to recycle the materials that bathtubs are made from. Tub Grinding refers to the shape of the opening of a large grinder. Typically the main use for this type equipment is to reduce the size of a debris pile. Here at Caroline-a-Contracting, we use our tub grinders to grind trees, wood waste, and vegetative debris into mulch.

Recycling and Tub Grinding Service:

The problem with “trash” is once it leaves your immediate viewing area, it’s not really thought of again.“Out of sight, out of mind” is an absolute in the world of disposables. It doesn’t even matter if what is being “thrown away” is recyclable or not. Once glass, plastic, wood or paper waste is removed, the majority of people do not think about where it ends up.

The bad news:

A lot of waste of all types still ends up in landfills and worse, in streams, rivers and in our oceans.

The good news:

More and more, many industries recognize the problems that massive amounts of waste creates. Recycled goods of all types are becoming commonplace. Even better, as more people are educated about the great need to repurpose plastics, wood, and paper they are twice as likely to ask for products made from recycled materials.

This is a large part of the reason we have many tub grinders in operation at CAC. Repurposing vegetative debris and fallen trees and branches into a safe, useful and beautiful colored mulches to enhance landscaping and retain moisture is one of our main functions. Tub grinding is the most efficient way of reducing large piles of vegetative debris or wood waste.

Making Room with Tub Grinding Services:

“We are often contracted by landfills that accept wood debris. It’s not uncommon to see towering mounds of vegetative waste this type; landfills need as much air space as possible. We come in with a loader and a tub grinder and give them back valuable real estate, quickly and at an affordable rate,” says Burton Edwards, Owner of Caroline-a-Contracting.

“Most people have seen a “wood chipper” or a small-scale grinder in their neighborhoods after a storm. Those are about the size of a small picnic table and are designed to be carefully hand-fed. Our tub grinders are sort of the Incredible Hulk (without the rage) version of these machines. The tub is a large opening on the top or the side of the grinder that allows us to use heavy equipment to efficiently move debris into it. These are big machines, around 50 feet in length; we pull them to job sites with a big truck and send support equipment to ensure jobs are done swiftly and seamlessly,” These machines can process almost 100 tons of debris per hour. Burton adds.

Cleaning up with Tub Grinding Services:

Tub Grinding is also sometimes called for when land is being cleared for development. Some contractors opt to have the vegetative debris from site work ground on site. This is a much better way to reduce the debris vs. open burning. Open burning is quickly becoming less popular as it pollutes the air and surrounding land areas. Often times, the rough mulch created is repurposed on the site. This mulch is often used to landscape common areas, walking trails or privacy berms. This end product is rough ground and uncolored.

We use our tub grinders on site to refine our end product. While do offer a rough cut uncolored mulch, we also double and triple grind some product depending on the application needed. So, what is tub grinding? Hopefully, you can now answer that question thoroughly!

In addition to tub grinding on our site or your’s, Caroline-a-Contracting offers complete Land Clearing, Soil Screening, and Hauling. For Landscapers, we carry lines of colored mulches, Cyprus Mulch, Top Soil, and Soil Amendment. CAC has a strong commitment to reuse, recycling and repurposing. Our mulches are comprised of vegetative debris and are recycled products. Top Soil is screened and offered back to landscapers, fallen branches and felled trees are ground in our tub grinders to various states and then colored with pet and kid safe dyes.

For questions about Tub Grinding or Caroline-a-Contracting numerous products and services, please call us. We look forward to helping you in the near future!

A Little More About Tub Grinders & Tub Grinding Services

Tub grinders were first introduced for wood and green waste recycling applications in the early 80’s. They were originally designed to recycle logging slash and lumber mill waste by reducing the waste wood into boiler fuel. Soon after development many landfills employed tub grinders for wood and greenwaste reduction purposes. Also, many composting operations arose to make use of the new source of mulch for a carbon source in their operations. Finally, the landscape mulch began to develop and replace much of the bark and pine needles that were common place previously.

Tub Grinder Sizes

There are a variety of sizes and horsepower, designed to handle land-clearing debris, bark, brush, logs, stumps, pallets, wood construction and demolition (“C&D”) material, leaves, as well as a large variety of other wood and greenwaste applications.

What Tub Grinders Produce

Many tub grinder operators produce salable product such as mulch, colored mulch, boiler fuel and mulch for composting. Other operators use their grinder to reduce the volume of greenwaste material to minimize the consumption of expensive landfill air space, or reduce trucking costs and save on fuel and dump or tipping fees.

Tub Grinder Brands

Brands include (but not limited to): Diamond-Z, Duratech, EarthSaver, FHE, Hogzilla, Lane, Morbark, Precision Husky, Toro, Vermeer and WHO.

Why Named "Tub" Grinders?

Tub grinders are aptly named for the distinctive infeed hopper which is simply a large round tub, normally 10’-14’ in diameter and roughly 6' deep. Production rates and capability of the tub grinder vary primarily with the weight, horsepower and size of the tub grinder. Smaller grinders may produce 20 yards of finished product an hour while larger grinders are capable of processing several hundred yards of finished product an hour. Production rates for each grinder will vary greatly depending on several factors. The primary determinants of production include: the type of material processed, the size of the finished product desired, support equipment available, and contaminants in the raw material..

What Tub Grinders Use For Fuel

Most tub grinders are powered by diesel engines, although many manufacturers also offer electric options (usually stationary). Caterpillar is the most common brand of engine found in larger tub grinders, although Cummins and John Deere are used frequently as well. Horsepower ranges from the mid 200’s to as high as 1200 in the largest machines.

How A Tub Grinder Works

At the base of the tub is the cylindrical shaped hammermill which is the primary grinding mechanism in the machine. The hammermill typically rotates around 1800 rpm. Some machines employ belt drives or gear boxes to effect the mill speed. Most tub grinders utilize a "Pin & Plate" style hammermill that consists of a prmary drive shaft, mill plates, rods and hammers.

Beneath the hammermill are rolled steel screen plates (usually around 1" thick for wood waste applications) with ½” to 6” holes cut in them which permit the material to pass through once the desired product size is achieved. A conveyor belt or augers located below the screens transports the finished product away from the mill to the discharge conveyor which carries the material away from the machine. Tub grinders are commonly mounted onto a rubber tire mounted frame with a fifth wheel-hitch. In some cases pintle hitches are offered for smaller machines and some tub grinders are available on tracks.

How To Use Tub Grinder

Tub grinders are typically loaded from the top with a front-end loader, grapple or excavator. Many units are also equipped with a self loading grapple and cab.

Typically the raw material does not need to be arranged in any particular fashion for proper feed or operation. Tub grinders rely primarily on gravity to feed the material into the hammermill at the bottom of the tub. Additionally the tub walls rotate around the hammermill and tub floor to pull material around to the hammermill. This tub rotation provides the operator with a way to control the speed at which the machine feeds raw material in the tub to the hammermill.

Tub Grinding is the answer when cleared trees and debris can't be burned on-site or when hauling it away is prohibitive. You can dramatically reduce the number of truckloads by turning trees to mulch.

Contact Information

 Caroline A Contracting
3248 Soco Rd
Waynesville, NC 28751
 Mon - Fri: 9 - 5, Sat 9 - 2

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