South Bend 9/10K METAL LATHE 56 tooth NYLON gear This is a FDM made Nylon gear 9/16 0.5625 Bore, keyed This gear made out of out of Nylon - tough and flexible plastic No lubrication required Only Nylons should be used for gears where a slippery surface is desired. All other materials (PLA, ABC, PET, etc.) will grind creating a plastic dust and eventually fail! For details, please review all pictures Do not waste money for ABS, PLA plastic gear that may strip or melt Gear face width .375 (3/8") 32t Center bore keyed .5625 (9/16") Outer diameter 2.4444" Diametrical Pitch 18 Part number: 32K56N1 Thank you. What feedback buyers of this item posted? Great Product! I saved at least $40.00. Will be buying again! I bought toner from another seller: it does not work correctly. "WOW this product works!! I'll keep buying from thiser!!!" Worked BETTER than expected!! Will definitely use again! Thanks A+++ I Thank You for saving me so much money, Will return! Thanks! I'll be buying more in the future. Thanks for reading!