Hindustan Engineers

cycle cotter pin Many older bicycles use wedge-shaped fasteners called "cotters" to hold the cranks onto the bottom bracket axle. These cotters have a nut to hold them in place after they have been driven or pressed

Many older bicycles use wedge-shaped fasteners called "cotters" to hold the cranks onto the bottom bracket axle. These cotters have a nut to hold them in place after they have been driven or pressed in. They can be difficult to remove, especially if they have been in place for a long time.