Gear Hobber H250 / H400 Heavy box type bed - rigid construction - shortest path for power transmission from motor to hob - AC motor drive with change gears for speed variation in steps - infinitely variable speed provided, alternatively. MAIN DATA H 250 H 400 Max dia spur or worm gear mm 250 400 Max module 6 8 Max travel of hob slide mm 245 300 Hob dia/length mm 130/150 186/180 Work table dia mm 250 400 Main motor kw 6.1/7.5 6.1/7.5