for Logan 9" , 10" 11" Lathe 37 / 47 tooth compound Nylon gear This fine Nylon gear has improved design for better durability and performance compare to OEM and superior to other replacements 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 5/8" bore lathes as well. DP: 16 37 tooth gear O.D. : 2.4375" 47 tooth gear O.D. : 3.0625" Gear face width: "0.4375" (37t gear) + 0.4375" (47t gear) = 0.875" (7/8) Overall Center bore: 5/8" (0.625") 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.