Jet 1024 Lathe 21 and 26 tooth reverse tumbler Nylon metric gear set 14mm bore, no bushing required! This fine FMD Nylon gear set has improved design for better durability and performance Nylon is a first choice gear material - it is naturally slippery, no lubrication required! Made out of Nylon - tough and flexible plastic Nylon gear set runs quieter and smoother Reduces wear on meshing gears 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. 26t gear outer diameter: 41.98mm 20t gear outer diameter: 34.40mm Gear tooth face width: 10mm Center bore: 14mm Module 1.5 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.