Promotional Dumbbells Head
Head Core
The head of the dumbbell is where most of the weight comes from. This weight is created in the development of the head core, which is generally constructed of cast iron, steel, or a combination material. The material used is then shaped into a circular, hexagonal, or whatever kind of shape is required for the head of a specific dumbbell.Head Outer Material
The outer section of the head is essentially there to cover the core, create a more aesthetically pleasing product, and to provide a base on which to write the weight of the dumbbell on. The outer material is where dumbbells can differ, and is where the different types mentioned above – chrome, rubber, plastic, and iron – come in.
The head of your promotional dumbbell is covered in one of a variety of materials
Promotional Dumbbells Handles
Generally, dumbbell handles are made of steel. To make them, manufactures start with a solid slab of steel. A lathe is then used to cut this slab into the cylindrical shape you will grip when lifting your dumbbell. Often you will find the handles have been knurled during the manufacturing. Knurling is a process whereby crossed lines are cut into a material in order to provide grip, as per the picture below.
Knurling on the handle of your promotional dumbbell helps to enhance grip