(WM-Series) USA 2-pc. Flywheel Knife Set (Reversible Dual Edge) 2013-Current
The WoodMaxx WM-8H hydraulic auto-feed chipper is a robust self-feeding PTO driven wood chipper attachment that mounts to the 3-point hitch of your tractor. This PTO wood chipper is compact, yet built to withstand commercial use. Dual powered infeed rollers grab and pull material into the chipper head using two powerful hydraulic motors. These motors are powered by the chipper’s self-contained hydraulic pump and tank. High quality made in the USA dual edge knives are standard equipment on all WM-series wood chippers.
WoodMaxx WM-series wood chippers are the perfect combination of size, weight, and features. The strength of our machines start with using heavy formed Q-235 (American standard A-36) structural steel plate; the strongest plate steel available. Each piece is CNC plasma cut, and meticulously welded. WoodMaxx WM-series chipper innovative structural design includes a 2″ diameter main shaft that passes through the flywheel housing and is supported by 3 bearings: 1 pillow block and 2 flange bearings. This feature, combined with the 2″ shaft, allows the flywheel to run true and ads a great deal of strength. This design sets WoodMaxx chippers far apart from the competition, and it is a design feature you should not overlook when shopping for a chipper.
Chipping capacity is directly related to horse power and torque, therefore with 19 hp. you can expect to chip 4″ hard and 6″ soft material and with 50 hp. you can expect to chip any material up to 8″ in diameter with no trouble.
WoodMaxx WM-8H chippers are complete with a self-contained hydraulic pump and a 38L (7) gallon reservoir tank to power the two infeed motors. Hydraulics are not required on your tractor. Adjustable speed aggressive dual counter-rotating hydraulic powered infeed rollers work together to pull material into the chipper head. This feature allows the user to slow the infeed speed down to accept large material.
WoodMaxx WM-8H wood chippers are equipped with a 24″ dynamically balanced flywheel. This flywheel paired with specific engineering components, delivers 200 lbs. of energy to quickly and easily chip a variety of branches. We use a 8 MM thick Q235 (American Standard A-36) structural steel plate to house the flywheel. This features easy access panels, in which chipper knives can be changed from the side of the machine by one person in as little as 10 minutes. Other chippers require you to reach into the infeed bin to hold the head of the bolt, while someone else turns the nut from the backside of the flywheel.
To allow the flywheel to run extremely true while adding a great deal of strength, the 2″ main shaft on the WM-8H PTO wood chipper passes through the flywheel housing and is supported by 1 pillow block and 2 flange bearings. Competing machines use a 1-3/4″ shaft in conjunction with two pillow block bearings, and the flywheel is cantilevered beyond these bearings. With this setup, there is a possibility of breaking a bearing housing if the machine jams.
WoodMaxx WM-series PTO wood chippers incorporate a series of precisely located ventilation holes in the flywheel chamber. This feature creates a strong vacuum that draws air into the flywheel chamber and in combination with the fan blades on the back of the flywheel forcefully ejects the chips out of the chamber. This keeps the discharge chute clear, and reduces the chances of a jam. The WoodMaxx patent pending hole pattern is specifically designed to bring the air into the chamber at the optimal volume and location. Other machines have tried to copy this feature, but have not achieved the same results!
This large 6.25″ diameter, circular shaped, commercial is a WoodMaxx innovation. Specially designed with chisel shaped, spaced teeth, it pulls material into the flywheel at speeds up to 75 ft. /min with ease. The spacing allows the complete down pressure of dual the high-tension springs to be focused on one chisel tooth at a time. This increases total down pressure and allows the roller to self-clean. These rollers, along with the dual high-tension springs aggressively bite into all types of material up to 8″, with or without leaves. Long or short needle pine and small vine type material are no problem for the WM-8H PTO wood chipper.
WoodMaxx WM-series chippers are equipped with four extreme duty 5/8″ wide EDPM rubber cogged drive v-belts that are made specifically for WoodMaxx. Cogged V-belts run cooler, and transfer more torque than plain smooth V-belts. Although the OEM belts are very high quality, if the need arises, the standard size BX belts allows you to purchase replacement v-belts at any auto parts store.
The hydraulic hose configuration for the WoodMaxx WM-8H requires multiple hydraulic hoses to eliminate the possibility of snagging a hose and offers a sleek new look. We also utilize JIC (joint industrial council) hose fittings that are rated for 5000 psi, so should you need to replace a hydraulic hose, maintenance will be effortless, and parts are easy to find.
These adjustable base legs will accommodate a large variety of tractors and allow you to easily meet the required PTO shaft angle (up to 25 degrees). WoodMaxx PTO wood chippers are able to accommodate tractors that have a PTO height from 18″ to 30″ high.
To prevent the machine from sinking into the soft ground during operation, the WM-8H offers a heavy-duty skid type support base designed to evenly distribute weight across a wider footprint.
The WoodMaxx WM-8Hwood chipper offers a large 20″ wide x 24″ tall infeed opening that funnels down to 8″ x 8″ to easily accept those crooked branches. Other 8″ chippers open 8″ wide, but only 4-1/2″ high.
Safety is paramount on WoodMaxx chippers. Located on the top of the infeed bin, the WM-8H utilizes an easy to activate hydraulic auto-feed stop safety bar to reverse the infeed rollers in case of an emergency, or to clear the infeed bin if necessary.
The addition of the pressure compensation flow control valve allows for infeed roller speed changes without causing back pressure on the hydraulic pump. This allows the user to regulate the speed of the infeed rollers to exactly match their tractors capabilities while increasing the life of the hydraulic pump.
360 degrees of rotation and two finger operation. We have incorporated a convenient handle that effortlessly allows you to swivel the discharge chute so that you can direct the chips into the back of a truck or trailer without having to move the entire machine. Simply push down on the handle and swing the chute. When you release the handle a spring loaded pin drops down to lock the chute into position. No tools required.
The WoodMaxx WM-8H PTO wood chipper utilizes high tension springs in conjunction with an adjustment mechanism that offers a full range of variable down pressure, since all branches are different – some soft and some hard. This feature allows the user to increase to decrease the upper roller down pressure to suit the situation. Crank up the tension to achieve up to 165 lbs. of down pressure. This allows the teeth on the roller to dig into the branches and ensure a smooth entry into the chipper head.
The automatic belt tensioner on the WM-8H hydraulic pump drive belt keeps consistent pressure on the belt. If the drive belt is too tight then excessive bearing and or pump failure is likely, too loose and the belt will slip. This feature eliminates the need to adjust the belt, ensures that proper tension is achieved, and increases the longevity of the pump and bearings. Also saves you the hassle of constant adjustment.
The WoodMaxx WM-8H wood chipper comes standard with USA made, high carbon A-8 tool steel, reversible dual edge knives installed. These knives are bolted into a milled pocket in the flywheel, incorporating a new flywheel pocket design developed at WoodMaxx. This eliminates knife and bolt breakage that can be found on other dual edge knife systems.
The WM-8H is also equipped with an adjustable bed knife. This ensures that the proper knife gap is achieved. This feature allows the user to adjust the distance between the flywheel knife and the bed knife so that the required distance is maintained after knife sharpening. Proper gap is important so that even the smallest material is chipped as it passes through the chipper.
Click here to learn how long your chipper knives will last.
WoodMaxx WM-series wood chippers are now equipped with a convenient tachometer/ hour meter. The tachometer allows the operator to see the actual RPM of the flywheel to ensure that the chipping head is running at the optimal recommended speed. Proper flywheel speed is important to develop the inertia required to chip hard material and evacuate the chamber effectively. The hour meter is helpful to ensure that proper maintenance intervals are kept in accordance with WoodMaxx recommendations. This all-weather meter is water proof and weather tight.
WM-series PTO wood chippers will mount to any Category 1 or 2 three-point hitch attachment and is category 1 quick hitch ready. (**John Deere I-match/Land Pride QH10 & QH05 require a special top link that we make for this purpose, please call to specify if you need this).
Please note: If you’re hooking up to a Cat-2 tractor, you will require a Cat-1 to Cat-2 bushing. If you’re hooking up to a Cat -1 tractor with a quick hitch, you will need Quick Hitch bushings. These chippers are not compatible with a Cat-2 Quick Hitch.
The WoodMaxx WM-8H wood chipper comes shipped to you in a metal crate and is 90% assembled. Simply attach the MX-9900 wood chipper to your tractor, lower the in-feed bin, raise the discharge chute, size and attach the PTO shaft (included), and fill the oil reservoir with 7 gallons of ISO-46 hydraulic fluid. The WM-8H PTO wood chippers are given a comprehensive 22-point inspection, prior to leaving our warehouse. Follow the user-friendly operator manual and you will be chipping in no time at all. WoodMaxx chippers come shipped to you in a steel crate and are almost completely assembled. Simply attach the infeed bin, discharge chute, PTO shaft (included), and attach to your tractor. All WoodMaxx chippers are given a comprehensive 22 point inspection, and are serviced prior to leaving our warehouse. The drive belts have been aligned and tightened, knives have been installed, adjusted, and torqued down, and bearings have been greased. These and other steps performed here greatly reduce assembly time on your end. Just follow the illustrated, American written, user friendly assembly manual (and watch the video), and you will be up and running in about 2 hours.
The WoodMaxx WM-8H PTO wood chipper comes with a 3-year warranty. At WoodMaxx our service department is staffed with professional certified technicians that inspect each machine before it is shipped. This ensures that you get a trouble-free machine from the get-go. When you need technical help or parts, our courteous staff can help you get what you need from our fully stocked warehouse.
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