keyed to the drive shaft 20 as well the idler shaft 22 is disposed parallel to the drive shaft 20 in the gear housing 30 the idler shaft 22 is journaled for rotation by a third and fourth bearing 82 and 84 where the third bearing 82 is mounted at the base of the idler shaft 22 near the base plate 14 bearings 82 and 84 are again preferably timken bearings that can be periodically adjusted as the wear the fourth bearing 84 is mounted near the top of the idler shaft 22 and fixed to the shaft by a washer 86 and threaded nut 88 a second helical gear 90 is operatively locked to the idler shaft 22 by a key member not shown the second helical gear 90 meshes with the first helical gear 80 a third helical gear 92 is also mounted on idler shaft 22 in between the second helical gear 90 and the fourth bearing 84 the third helical gear 92 is operatively keyed to the idler shaft 22 for rotation therewith the bottom portion of the cutter shaft 26 passes through the bottom aperture 24 of the base plate 14 the cutter shaft 26 is journaled for rotation in the bottom aperture 24 by a fifth bearing 94 that sits in the aperture 24 and a sixth bearing 96 the fifth bearing 94 is.