Eter main shaft runs from the flywheel, through the housing and is supported by two Flange bearings and one pillow block bearing. All bearings have grease nipples to increase longevity. Auto feed The tm-8 comes equipped with a mechanical drive automatic feed system. The single in-feed roller Pulls the brush intothe chipper allowing for a much more efficient chipping process than that of a Gravity fed system. The in-feed roller is driven off of the pto through a heavy duty gear box and Slip joint splined drive shaft. The u joints are covered with a thick rubber boot to prevent dirt and Debris from building up. Housing ventilation The tm-8 features multiple ventilation holes throughout the flywheel housing. The purpose of the Ventilation holes is to help increase proper wood chip discharge through the shoot. As the flywheel Rotates, the large paddles on the back, pull the air in through the ventilation holes and dramatically Increases the air flow. This in turn, ensures a quick wood chip discharge without the worry of the Chute clogging. Technical details Model Tm-8 Max. Dia. Of feeding 8'' Power required 25~45hp()540/720rpm) Dia. Of chipper flywheel 24''(600mm) Turning speed of chipper disk 1080rpm/1410rpm Feeding system In-deeding by worm reduction Feeding system Gear(4mm/s) Feeding system Only forward function Blade material Durable chromium cr-12 Sawdust measurement Thickness