You may have seen a blender, a grinder, or a hammermill, but one of my clients makes serious grinders. I'm talking about grinders that can grind up a huge tree stump, an engine block, a refrigerator, or a ton of landfill in one gulp. Farmer Melvin Zehr used a type of grinder to break up baled hay for his cattle to eat. He thought he could build a better grinder, and he did. His son Marty was soon designing grinders, and Marty's work led to the formation of Diamond Z, Inc. Marty built an ever better grinder, and another, and so on. In no time, Diamond Z had 20 years of grinder design under their belt, and their machines were the Cadillac of heavy grinders.
One of their tub grinder has a 14 foot wide rotating tub, into which tree stumps, forest waste, railroad ties, etc are placed. There is a square hole in the floor of the tub, and a few inches of a huge cylindrical hammermill sticks up throught the hole. As a tree stump goes over the exposed hammermill in the floor, grrrrrrrrr, 4 inches of it is gone. After a few passes, the whole thing has been turned into mulch. Their tub grinders are mounted on semi trailor frames and are narrow enough, just barely, to move down the highway. The grinder weighs 112,000 pounds, and is driven by two diesel engines with a total of 2000 horse motor. The hammermill is made up of about 26 hammers, each hammer weighing 120 pounds. That kind of power lets the machine chew up 42" diameter logs, root balls and all.
Marty is Chairman, and consults on the designs, while Bob Marshall runs the company as President, with Carl Bonner designing new machines and features, and Steve Peel as CFO.






Rain Tree Tree Services LLC provides professional tree services in Houston including Tree Removal Stump, large tree removal, Removing Tree Stump and all tree services in Houston, The Woodlands, Conroe and Tomball, Texas and nearby area
Posted by: Tree Removal Stump | November 08, 2009 at 05:58 AM