Tree Trunk Loading Arms - NUR Engineering Set Wooden loading arms; they are produced in different shapes and types according to forest trees and machine models. Thanks to the field experience we have gained over the years and the feedback from customers in forest equipment, the loading arms provide a hassle-free service to users. They are produced with a 360-degree rotation with a fixed connection and a swinging connection. The cylinder used is of the heavy-duty type. There is a double link arm in the loading arms. There are protections to protect the cylinder. The lightweight Hardox material is used in the timber clamps. We also provide support for the hydraulic installation for our customers so that they can use the wooden loading arms in their machines without any problems