Atlas Craftsman 10" 12" Lathe tooth rear head stock spindle Nylon gear 32 tooth, 1-1/4 bore This fine Nylon gear has improved design for better durability and performance It is superior to other plastics 3D printed replacements FDM 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 32 tooth gear O.D.: 2.125" Center bore diameter: 1.25" with 3/16" single key way Gear face width: 0.875" (7/8") 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. Worked BETTER than expected!! Will definitely use again! Thanks A+++ I Thank You for saving me so much money, Will return! Thanks for reading!