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Location: ChinaMember since: Mar 08, 2018Seller: glhk01
xlnt gears per listing_fast int'l post_xlnt deal/seller !!! This "module" scheme relates to PD (pitch diameter) vs OD (overall diameter) where "module 2" gears have 2mm between PD and OD whereby spur gear teeth overlap 2x given module no. measured via mm. Anyone attempting DIY drive train needs to study these factors and this seller has detailed charts.