Turn to Thermotron for rugged magnesium armatures that are lightweight and durable for higher maximum acceleration levels for electrodynamic vibration shakers. Radial-finned design uniformity directs forces through a single structure to the specimen mounting surface. Mounting surface incorporates standoffs arranged on concentric bolt circles to minimize thermal transfer and support long-term reliability testing. Armature size options are 12″, 16″, or 24″, available sizes depend on the electrodynamic vibration shaker and required performance specifications.