The HOC WM8M mechanical auto-feed wood 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 rigorous use. Dual infeed rollers grab and pull material into the chipper head using a sturdy belt driven gear box and drive axle system. High quality (A8 tool steel) made in the U.S.A. chipper knives are standard equipment on all WM-series wood chippers. 

 

BELT DRIVEN GEAR BOX AND DRIVE AXLE SYSTEM 

 

The in-feed system on the WM-8M utilizes a belt driven oil bath heavy duty gear box that increases torque and transfers power to the upper feed roller through an extreme duty drive axle. For long life, the drive axle is machined splined (similar to the PTO spline of your tractor), and the U-joints are protected from debris by a rubber boot. The clutch mechanism is precisely machined from solid steel to ensure proper function. This in-feed system will feed material at a rate of 58 ft./min.

 

 

WIDE FOOTPRINT SKID TYPE SUPPORT BASE 

 

Because of its robust weight and to prevent the machine from sinking into the soft ground during operation, the new WM-8H offers a wide footprint skid type support base. This base is angle upward on the end to prevent digging into the ground while transporting.

 

 

ADJUSTABLE BASE LEGS 

 

These adjustable legs will help accommodate a larger variety of tractors. This innovation allows you to more easily meet the required PTO shaft angle (less than 15 degrees) on larger tractors. Simply insert the adjustable legs, and then slide the pin into the hole for your required leg height. HOC PTO wood chippers are able to accommodate tractors that have a PTO height from 18" to 30" high.

 

 

HIGH FLOW FLYWHEEL CHAMBER VENTILATION 

 

HOC WM-series wood chipper attachments 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. 

 

 

HEAVY DUTY CAST STEEL BEARING HOUSINGS 

 

Three heavy duty cast steel bearings support the main shaft, which passes through the flywheel housing, and is supported on either side by flange bearings. This heavy duty, shock resistant cast steel bearings are much more durable than cast iron - a unique feature of the HOC chipper.

 

FULLY ADJUSTABLE IN-FEED ROLLER TENSION SPRINGS 

 

The HOC WM-series chipper utilizes high tension springs in conjunction with a unique 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.

 

MAIN SHAFT SUPPORTED BY 3 BEARINGS 

 

The 2" main shaft on the WM-series PTO wood chippers passes through the flywheel housing and is supported by 1 pillow block and 2 flange bearings. This feature, combined with the 2" shaft, allows the flywheel to run truer, and adds a great deal of strength. Other chippers use a 1-3/4" shaft, 2 pillow block bearings, and the flywheel is cantilevered beyond the bearing. With this setup, there is a possibility of breaking a bearing housing the machine jams.

 

 

WEIGHT

 

Gross Weight: 375.5 kg

Net Weight: 355.5 kg

Steel crate dimensions are L=46" x W=36" x H=48"

More weight = more steel

More strength and stability... period.

 

 

8MM THICK FLYWHEEL HOUSING 

 

WM-series chippers use heavy gauge 8mm thick Q235 (American Standard A-36) structural steel plate for the flywheel hou