Machine Specifications MAXIMUM WORK DIAMETER:.............................................6" MAXIMUM TRAVEL OF HOB CARRIAGE:.............................16-1/2" MAXIMUM DIAMETRAL PITCH, 1 CUT:.........................16 DP - 2" DIAMETER MAXIMUM DIAMETRAL PITCH, 1 CUT:.........................48 DP - 6" DIAMETER MAXIMUM HOB DIAMETER:................................................2-1/16" HOB SPEED:....................................................133 - 533 RPM WORK SPINDLE BORE:...................................................1-1/32" WEIGHT OF MACHINE:................................................3,500 LBS. MACHINE IS EQUIPPED WITH: Precision Triple Thread Worm Bayonet Center Change Gears 1 Hob Arbor Late model electrics v-way construction triple thread commercial worm full set of change gears books and manuals This machine was designed as a copy of the barber-colman gear hobbers which utilized all the best features of the latest model machines manufactured by Barber-colman . all tooling and accessories will fit the AD-6-16 . Contact us to come and inspect this machine in our statesville NC facility.