Overall weight of the Jxburgmann Wedge Anchor

  • Density relates to weight. Materials with lower density are lighter than those with higher density. The low weight has a great impact on the reduction of rolling element centrifugal forces and gyroscopic moments at high speed operations. Overall weight of the Wedge Anchor is also reduced by low density materials.

    Young's modulus of elasticity relates to rigidity. Higher elastic modulus materials yield higher system stiffness and lower bearing deflection. Under load, ball deformation is smaller thus the area of contact is reduced (for same size bearings with same internal geometry). Reducing the contact areas resulted in lower friction but higher contact stresses and the lower static load capacity of the bearings.

    Surface hardness relates directly to bearing life and performance. High hardness materials have better wear (fatigue) resistance. This is crucial for the repeated surface contacts the bearing must endure in operation.

    With high hardness material, excellent (ultra) surface finish is achievable (via polishing). Surface finish (roughness) relates to torque and noise. Smooth surface finish does not require high torque to rotate and eliminates excessive roughness that could lead to noise (and vibration).

    The advantages of using alternative ball options are more than material properties. Dissimilar materials, ability to operate with marginal lubrication, fatigue resistance, and corrosion resistance are all associated attributes that contribute greatly to the improved performance of the bearing. Below is a brief discussion of these attributes (shared by both options).

    Thermal expansion is an important aspect for any material. The changing of temperature, from ambient, must be considered to analyze the effects of material growth. In preloaded Mechanical Seals for Pumps , the differences in ring and ball growth could cause a change in preload.