ATLAS CRAFTSMAN 10 12" 48 tooth Nylon Gear This fine Nylon gear has improved design for better durability and performance Nylon is a first choice gear material - it won't create plastic dust as ABC does! FDM made out of Nylon - tough and flexible plastic Nylon naturally slippery, no lubrication required! Runs quieter and smoother Only Nylons should be used for gears where a slippery surface is desired. All other materials (PLA, ABS, PET, etc.) will grind creating a plastic dust and eventually fail! For details, please review all pictures May fit other 3/4" bore lathes as well. Outer diameter: 3.125" Gear face width 0.325 Hub width: 1/2' (0.5" thick) Center bore: 3/4" (0.75") 2x 3/16 keys Diametrical Pitch: 16 OEM part number 9-101-48A Do not waste your money on ABS or PLA plastic gear that may strip or even melt! Introductory price - please share installed images and review.