The high-quality head expanders increases the capability of existing shaker systems by allowing users to increase the effective mounting surface compared to that of the armature, and thus accommodate larger payloads.

The head expanders have been designed using advanced finite element (FE) analysis modelling techniques and are cast from a high-strength magnesium alloy with excellent damping properties.
Each head expander is supplied complete with fasteners and fitting tools for immediate testing capability.
To enable use with environmental chambers, thermal barriers are available for each size in the range. Other insert patterns can be supplied to special order.

Uses

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

Features

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

Characteristics of head expanders

Designed using finite element analysis (FEA) technology, Head Expanders are cast from a 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 types of head expander as standard products: guided and unguided.

Guided head expanders enable you to test payloads with masses greater than those the shaker can support. Available forshakers (whether trunnion- or combo-mounted) they are 1200 mm2 in size and have a support capability up to 1200 kg.
Unguided head expanders allow you to test payloads whose dimensions exceed those of the shaker’s armature work surface. As they are intended to accommodate larger – not heavier – articles, unguided head expanders do not provide additional load support. Head expanders are also available for the larger water-cooled systems.

For immediate testing, all head expanders are supplied complete with fasteners and fitting tools, including keyed payload attachment inserts in both grid and armature patterns, as well as armature screws, dedicated wrench key and torque wrench, and lifting eye-bolt.

Characteristics of thermal barriers

By reducing the heat conductivity between payload and shaker (or slip table, if one is used), thermal barriers enable vibration testing systems to operate with climactic chambers for environmental tests. We offer thermal barriers to match all sizes of head expander ; other insert patterns can be supplied to special order.

The thermal barrier has clearance holes corresponding to the expander’s insert pattern and M6 helicoil inserts along the edges for the clamping strips. All thermal barriers are supplied with lifting eyebolts, clamping strips, corner clamping strips, and attachment screws.

Model	Vertical Head Expander(Square)Specification
Model	Vertical Head Expander(Square)Specification
CZ0303	7	8	10			Effective mass(kg)
CZ0303	2000	2000	2000			Up limit frequency(Hz)
CZ0404	12	13	21
CZ0404	2000	2000	2000
CZ0505		23	29	32	35
CZ0505		2000	2000	2000	2000
CZ0606		35	38	40	40	48
CZ0606		1000	1500	2000	2000	2000
CZ0707		40	43	60	70	80
CZ0707		1000	1000	2000	2000	2000
CZ0808		60	60	70	80	85	100	100
CZ0808		800	1000	1200	1300	1200	1500	1500
CZ0909			80	95	95	105	120	120
CZ0909			500	1000	1000	1000	1000	1000
CZ1010			73	100	110	175	190	210
CZ1010			400	600	1000	1000

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