A solid CNC machined aluminium 40 tooth gear compatible with Lego Technic. Perfect for when you need gears that won't strip or break under large loads (RC cars, big MOC builds etc). They work perfectly with other Lego Technic gears and parts. Parts works like 3649 / 34432.
Use a light oil or grease if the gear is too tight or push the supplied pin into the small holes to enlarge them to give a tighter grip on the axle.
Use a light oil or grease if the gear is too tight or push the supplied pin into the small holes to enlarge them to give a tighter grip on the axle.