Constant Natural Frequency Elastomeric Isolators
Constant Natural Frequency Elastomeric Isolators
Constant Natural Frequency Elastomeric Isolators
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ND40 and ND41 Series<br />
These isolators are based on cylindrical elements. They are the best option for<br />
applications requiring good isolation and short settling time with respect to horizontal<br />
motions while maintaining low tilt due to moving loads.<br />
Specifications<br />
NewDamp ND41 Series<br />
ND40 and ND41 Series<br />
FREQUENCY (Hz)<br />
40<br />
30<br />
20<br />
10<br />
0<br />
0 100 200 300 400 500<br />
LOAD (lb)<br />
Model (Metric)<br />
ND41-A (M-ND41-A)<br />
ND41<br />
ND40<br />
Optical Tables and Vibration Control<br />
LOAD (lb)<br />
400<br />
300<br />
200<br />
100<br />
ND41<br />
ND40<br />
Model (Metric)<br />
ND41-B (M-ND41-B)<br />
Load per Isolator [lb (kg)] 70 (30)–225 (100) 70 (30)–225 (100)<br />
Load Range (set of 4) [lb (kg)]<br />
<strong>Natural</strong> <strong>Frequency</strong> (Hz)<br />
280 (120)–900 (400) 280 (120)–900 (400)<br />
Vertical 12–21 12–21<br />
Horizontal 4–6 4–6<br />
Height, Isolator [in. (cm)] 2.25 (5.7) 2.25 (5.7)<br />
Base Dimension [in. (cm)] 3.0 x 3.0 (7.6 x 7.6) 2.5 x 2.5 (6.4 x 6.4)<br />
Interface Compatability Breadboard, Microlock X95 Rail Breadboard, Microlock<br />
ND Settling Time vs. Other <strong>Isolators</strong><br />
A remarkable property of NewDamp isolators is their ability to quickly attenuate the<br />
transient motions, thereby reducing the settling time of the equipment after the stage<br />
movements or other disturbances. The following comparison was made for a dual-axis air<br />
bearing stage mounted on a granite basis (total weight: 800 kg) and supported by four<br />
NewDamp ND40 isolators.<br />
NewDamp ND40 Series<br />
Model (Metric)<br />
ND40-A (M-ND40-A)<br />
Model (Metric)<br />
ND40-B (M-ND40-B)<br />
Load per Isolator [lb (kg)] 100 (45)–450 (200) 100 (45)–450 (200)<br />
Load Range (set of 4) [lb (kg)]<br />
<strong>Natural</strong> <strong>Frequency</strong> (Hz)<br />
400 (180)–1800 (800) 400 (180)–1800 (800)<br />
Vertical 12–21 12–21<br />
Horizontal 4–6 4–6<br />
Height, Isolator [in. (cm)] 2.63 (6.7) 2.63 (6.7)<br />
Base Dimension [in. (cm)] 3.0 x 3.0 (7.6 x 7.6) 2.5 x 2.5 (6.4 x 6.4)<br />
Interface Compatability Breadboard, Microlock X95 Rail Breadboard, Microlock<br />
0<br />
0 0.1 0.2 0.3 0.4 0.5<br />
DEFLECTION (in.)<br />
Email: sales@newport.com • Web: newport.com<br />
Customized ND41 NewDamp<br />
<strong>Elastomeric</strong> Isolator.<br />
ND40<br />
Basis Motion (µm)<br />
200<br />
100<br />
0<br />
-100<br />
-200<br />
Other Elastomer<br />
Basis motion (µm)<br />
200<br />
100<br />
0<br />
-100<br />
-200<br />
Custom machine isolators.<br />
0.2 0.4 0.6 0.8 1<br />
Time (s)<br />
0.2 0.4 0.6 0.8 1<br />
Time (s)<br />
Custom machinery feet offer high horizontal<br />
damping with vertical stiffness.<br />
1057<br />
TECHNICAL REFERENCE OPTICAL TABLES BREADBOARDS<br />
HONEYCOMB, GRANITE<br />
AND GRID PLATFORMS AND RIGID STRUCTURES<br />
ISOLATORS WORKSTATIONS AND<br />
ISOLATED PLATFORMS<br />
STRUCTURAL RAILS<br />
AND CARRIERS<br />
TESTING, ANALYSIS<br />
AND DESIGN
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