In Gülmak Nova Series Coffee Roasting Machines, the material of all our drum models is produced by Carbon Steel company, which makes special production for our company. Thanks to this special material used in the drum and mixing pallets, the aroma of the coffee stands out and the coffee swells better. The mixing pallets rotate helically against the direction of the drum rotation. This ensures even distribution in the batch. Therefore, apart from the differences in coffee breeds, there is no risk of colour difference (burnt) products caused by the coffee roasting machine, which affects and worsens the aroma of the coffee.