Head Expanders And Fixtures*

Sentek Dynamics provides a wide range of standard head expanders and custom fixtures for vibration testing applications requiring a larger mounting area, vertical mounting or simultaneous testing of multiple devices under test (DUTs) with standard head expander sizes going up to 3000 mm (118.1 inches). The standard material is magnesium with aluminum offered as an affordable option. 

Standard Head Expanders 

  • Head plates (square or round) for low-frequency (less than 350 Hz) testing where a large mounting area is needed at an economical cost. (Note: recommended for DUTs with a low center of gravity)

  • Head expanders (square or round) for working frequencies ranging from 350 to 2000 Hz.

  • Standard and custom insert patterns are available to suit customer fixturing needs

Standard head expanders include stainless steel inserts for enhanced strength and durability.

Head expanders with load support and guidance are designed for performing demanding transportation profiles with large, heavy DUTs to provide additional load support and restraint. Load support and guidance allow DUTs with large footprints to be safely mounted and tested on the shaker, eliminating the risk of damage to the shaker guidance system. 

Custom Fixtures

  • Cube

  • L - type

  • T - type

Custom fixtures can be designed and manufactured to meet unique customer requirements.  Custom cube, L, or T type fixtures are frequently used by customers without a slip table for testing a DUT in all 3 axes.

See table below for standard head expander specifications. For custom head expanders and fixtures, please contact the Sentek Dynamics sales office.

Model number example – HES1000X-1200/###

Where X = M for Magnesium or A for Aluminum and ### = Armature diameter in millimeters

Dimensions
L x W x H (mm)		 Maximum Working Frequency (Hz) Suitable Armature Diameter (mm) Approximate Weight
Sine Random Mg Al
kg lb kg lb
Square Plate - Casting
HES300X-1000/### 300x300x30 1000 2000 110, 150, 200, 240 4.6 10 7 15
HES400X-600/### 400x400x30 600 2000 150, 200, 240, 320 11.7 26 18 40
HES500X-500/### 500x500x45 500 2000 150, 200, 240, 320 19.5 4 30 66
HES600X-400/### 600x600x45 400 2000 200, 240, 320 26 57 40 88
Square Grid - Casting
HES500X-500/### 500x500x45 500 2000 110, 150, 200, 240, 320, 400, 445 9.8 22 15 33
HES630X-360/### 630x630x45 360 2000 150, 200, 240, 320, 400, 445 13.7 30 21 46
HES800X-350/### 800x800x70 350 2000 200, 240, 320, 400, 445, 560 35.1 77 54 119
HES1000X-350/### 1000x1000x110 350 2000 240, 320, 400, 445, 560, 640 87.8 194 135 298
HES1200X-300/### 1200x1200x130 300 2000 400, 445, 560, 640 120.3 265 185 408
HES1500X-300/### 1500x1500x200 200 2000 400, 445, 560, 640, 760 312 688 480 1058
Square - Weldment
HES500X-2000/### 500x500x200 2000 2000 200, 240, 320, 400, 445 27.3 60 48 406
HES600X-2000/### 600x600x250 2000 2000 200, 240, 320, 400, 445 50.7 112 72 159
HES700X-2000/### 700x700x200 2000 2000 240, 320, 400, 445, 560 58.5 129 90 198
HES800X-2000/### 800x800x200 2000 2000 240, 320, 400, 445, 560, 640 78 172 125 276
HES900X-1500/### 900x900x200 1500 2000 320, 400, 445, 560, 640 95 209 140 309
HES1000X-1200/### 1000x1000x250 1200 2000 320, 400, 445, 560, 640, 760 139.8 308 215 474
HES1200X-1000/### 1200x1200x300 1000 2000 320, 400, 445, 560, 640, 760 201.5 444 310 683
HES1500X-600/### 1500x1500x375 600 2000 445, 560, 640, 760, 860 351 774 540 1191
HES1800X-500/### 1800x1800x400 500 2000 445, 560, 640, 760, 860 552.5 1218 870 1918
HES2000X-450/### 2000x2000x400 450 2000 445, 560, 640, 760, 860 747.5 1648 1025 2260
HES2500X-400/### 2500x2500x500 400 2000 560, 640, 760, 860 1040 2293 1600 3527
HES3000X-250/### 3000x3000x500 250 2000 640, 760, 860 1430 3153 2200 4850
Model Dimensions
L x W x H (mm)		 Maximum Working Frequency (Hz) Suitable Armature Diameter (mm) Approximate Weight
Sine Random Mg Al
kg lb kg lb
Round
HER250X-2000/### φ250x60 2000 2000 110, 150 2.6 6 4.5 9.9
HER300X-2000/### φ300x70 2000 2000 110, 150, 200, 240 3.9 9 6 13
HER350X-2000/### φ300x30 2000 2000 110, 150, 200 5.5 12 9 20
HER400X-2000/### φ400x80 2000 2000 150, 200, 240, 320 9.1 20 14 31
HER400X-2000/### φ400x200 2000 2000 150, 200, 240, 320 13.7 30 21 46
HER500X-2000/### φ500x80 2000 2000 200, 240, 320 14.3 32 22 49
HER500X-2000/### φ500x150 2000 2000 200, 240, 320, 400 23.4 52 36 79
HER500X-2000/### φ500x250 2000 2000 240, 320, 400 35.8 79 55 121
HER600X-2000/### φ600x250 2000 2000 240, 320, 400 45.5 100 70 154
HER630X-1000/### φ630x150 1000 2000 240, 320, 400 29.3 65 45 99
HER630X-2000/### φ630x250 2000 2000 320, 400, 445 45.5 100 70 154
HER700X-2000/### φ700x250 2000 2000 320, 400, 445 54.6 120 84 185
HER750X-1500/### φ750x250 1500 2000 320, 400, 445 55.3 122 85 187
HER1000X-1200/### φ1000x250 1200 2000 400, 445, 560 130 287 176 388
HER1200X-1000/### φ1200x250 1000 2000 400, 445, 560, 640 169 373 260 573
HER1500X-1000/### φ1500x400 1000 2000 560, 640 279.5 616 415 915

*Systems tested & assembled in the USA now available. Contact sales for details.