Andrew/Whittet-Higgins: One pitfall is not allowing the needed spacing in the assembly housing. If the components are not locked patts together properly, the machinery can fail prematurely. A second pitfall is air assuming that a particular torque measurement for one component is correct for the entire assembly.Jim/Stafford: * Using a set-screw collar on a hardened shaft. The screw does not "set," and holding power is greatly diminished.* Using a set-screw collar on thin-wall tubing, which can permanently distort the tubing.* Specifying too thin a width on a clamp-type collar, leaving it too weak to resist distortion when the clamp-screw is tightened.* Specifying too thin a clamp-slot on threaded shaft collars where the collar must flex more in order to adequately clamp onto the threaded shaft.

Andrew/Whittet-Higgins: One pitfall is not allowing the needed spacing in the assembly housing. If the components are not locked patts together properly, the machinery can fail prematurely. A second pitfall is air assuming that a particular torque measurement for one component is correct for the entire assembly.Jim/Stafford: * Using a set-screw collar on a hardened shaft. The screw does not "set," and holding power is greatly diminished.* Using a set-screw collar on thin-wall tubing, which can permanently distort the tubing.* Specifying too thin a width on a clamp-type collar, leaving it too weak to resist distortion when the clamp-screw is tightened.* Specifying too thin a clamp-slot on threaded shaft collars where the collar must flex more in order to adequately clamp onto the threaded shaft.

Jim/Stafford: Early design involvement on the part of the manufacturer is the best way to make sure the resulting component will be reliable and effective.Jeff/Tollok: tool Carefully review your application requirements. Shaft material, hub material, transmittable torques, and bending moments can influence your selection of the patts proper locking assembly.Intelligent designWhat can DESIGNERS do when selecting and applying locking devices to improve productivity?Jeff/KTR: Obtaining comprehensive technical information will improve selection and performance. Find a manufacturer that maintains the quality of materials, air dimensions, and surface finishes.Jeff/Tollok: Too often not enough questions are asked, and selections are made based on previous designs. Don''t use the same locking assembly simply because it tool was used elsewhere on the same machine or on a previous machine design. Involve your supplier and use their experience to get recommendations.