Meccano mesh gears 38 DP standard gears Image Teeth Part Description Creator 12 25c Pinion (early clockwork motors) Grendel 13 25r Pinion (later clockwork motors) Grendel 14 Pinion Grendel 15 26c Pinion (stardard) Grendel 16 26g Pinion Grendel 17 26h Pinion Grendel 18 25g Pinion Grendel 19 26a Pinion for splined boss (stardard) Grendel 19 Pinion large hole(stardard) Grendel 19 Pinion thick (stardard) Grendel 19 Pinion tri-flat thick large hole (stardard) Grendel 19 Pinion tri-flat thick large hole (stardard) Grendel 19 Pinion tri-flat thick (stardard) Grendel 19 26p3p Pinion Grendel 20 25l/26a Pinion (stardard, early obsolete) Grendel 21 Pinion Grendel 22 26f Pinion Grendel 23 Pinion Grendel 24 25p Pinion Grendel 25 Pinion for splined boss Grendel 25 26 Pinion (stardard) Grendel 25 26 Pinion (stardard) Grendel 25 26 Pinion grub screw (stardard) Grendel 25 Pinion tri-flat Grendel 25 Pinion thin Grendel 25 Pinion tri-flat thin Grendel 26 25q Pinion Grendel 27 25s Pinion Grendel 28 25c Pinion Grendel 29 Pinion Grendel 30 26k Pinion Grendel 31 Pinion Grendel 32 Pinion Grendel 33 Pinion Grendel 34 Pinion Grendel 35 Pinion Grendel 36 Gear Grendel 37 Gear Grendel 31 Gear grub screw Grendel 31 Gear tri-flat Grendel 31 Gear Grendel 38 31 Gear Grendel 38 31 Gear (standard) Grendel 38 31 Gear (standard) Tony Kirk 39 Gear Grendel 40 31 Gear (standard, early obsolete) Grendel 40 31 Gear (standard) Tony Kirk 41 Gear Grendel 41 Gear Grendel 42 Gear Grendel 43 Gear Grendel 44 Gear Grendel 45 Gear Grendel 46 Gear Grendel 47 Gear Grendel 48 Gear Grendel 49 Gear Grendel 50 27 Gear Grendel 50 27 Gear (standard) Grendel 50 27 Gear (standard) Grendel 50 27 Gear boss + nuts Grendel 50 Gear tri-flat Grendel 57 27a Gear (standard) Dave Burrell 57 Gear thick boss Dave Burrell 133 27b Gear (standard) Dave Burrell