Vibration Shaker Head Expander Guided / Unguided Vibration Test Fixtures

The high-quality head expander increases the capability of existing shaker systems by providing a larger effective mounting surface than the armature, enabling accommodation of larger payloads.

• High-quality aerospace-grade magnesium alloy structure with excellent damping properties
• Usable frequency range up to 2 kHz
• Standard insert pattern in M8, M10 or 3/8 UNC insert sizes
• Accurate, in-house tested dynamic performance (first mode data supplied)
• Includes full mounting kit with tools
• Corrosion resistant: Non-machined parts are painted; machined parts are coated with lubricant
• Standard off-the-shelf design for short lead time
• Full technical support
• Accelerometer options available

• Increase the effective mounting surface of the shaker armature
• Accommodate larger payloads
• Increase quantity of test items in one test to reduce testing time
• Provide increased flexibility in fixture design

Designed using finite element analysis (FEA) technology, Head Expanders are cast from high-strength, aerospace-grade magnesium alloy with excellent damping properties to minimize force dispersion. They have a usable frequency range from DC - 2000 Hz. To prevent corrosion, non-machined parts are painted, and machine parts are coated with lubricant.

We offer two standard product types:

• Guided head expanders: Enable testing of payloads with masses greater than those the shaker can support. Available for shakers (whether trunnion- or combo-mounted), they are 1200 mm² in size with support capability up to 1200 kg.
• Unguided head expanders: Allow testing of payloads whose dimensions exceed those of the shaker's armature work surface. Designed for larger (not heavier) articles, they don't provide additional load support. Also available for larger water-cooled systems.

All head expanders come complete with fasteners, fitting tools, keyed payload attachment inserts (both grid and armature patterns), armature screws, dedicated wrench key, torque wrench, and lifting eye-bolt for immediate testing capability.

Thermal barriers reduce heat conductivity between payload and shaker (or slip table), enabling vibration testing systems to operate with climactic chambers for environmental tests. Available to match all head expander sizes, with other insert patterns available to special order.

Each thermal barrier features:

• Clearance holes corresponding to the expander's insert pattern
• M6 helicoil inserts along the edges for clamping strips
• Includes lifting eyebolts, clamping strips, corner clamping strips, and attachment screws