Atlas Craftsman 6" Lathe 101, 618. 36 Tooth Gear Part # M6-101-36 This fine Nylon gear has improved design for better durability and performance compare to OEM and superior to other replacements US 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 1/2" bore lathes as well. O.D. : 1.5833" (40.14mm) Gear face width: "3/8" (9.6mm) Center dual key bore: 1/2" (0.5") 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.