Constant Natural Frequency Elastomeric Isolators

Optical Tables and Vibration Control
NewDamp
Constant Natural Frequency Elastomeric Isolators
ND01 Series
ND01-A supports up to 250 lbs. and provides excellent CNF (constant natural frequency)
characteristics: the vertical natural frequency is virtually constant at approximately 22 Hz
for loads above 70 lbs. per isolator. This compact size isolator ensures excellent
horizontal isolation with natural frequencies of 5 to 7 Hz and minimum resonance
amplification. The typical isolation characteristics are shown.
Specifications
Load per Isolator [lb (kg)]
Model (Metric)
ND01-A (M-ND01-A)
70 (30)–250 (115)
Load Range (set of 4) [lb (kg)]
Natural Frequency (Hz)
280 (120)–1000 (460)
Vertical 21–22
Horizontal 5–7
Height, Isolator [in. (cm)] 1.36 (3.5)
Base Dimension [in. (cm)] 2.5 x 1.5 (6.4 x 3.8)
Interface Compatability Breadboard, Microlock
Dimensions
Model ND01-A
2.50
(63.50)
1.36
(34.59)
A
A
1.50
(38.10)
B
CLR FOR M6
A
M6 X 1.0
1.63 DIA
(41.28)
SECTION A-A
Dimensions [in. (mm)]
Model (Metric) A B
ND01-A (M-ND01-A) 2.00 (50.0) 1.00 (25.0)
Email: sales@newport.com • Web: newport.com
ND01-A
LOAD (lbs)
FREQUENCY (Hz)
HORIZONTAL TRANSMISSIBILITY (dB)
VERTICAL TRANSMISSIBILITY (dB)
200
100
0
0 0.05 0.1 0.15 0.2
DEFLECTION (in.)
30
25
20
15
0.25
10 0 50 100 150 200 250 300
LOAD PER ISOLATOR (lb)
5
0
-5
-10
-15
1055
-20
1 10
FREQUENCY (Hz)
100
5
0
-5
-10
-15
-20
1 10
FREQUENCY (Hz)
100
TECHNICAL REFERENCE OPTICAL TABLES BREADBOARDS
HONEYCOMB, GRANITE
AND GRID PLATFORMS AND RIGID STRUCTURES
ISOLATORS WORKSTATIONS AND
ISOLATED PLATFORMS
STRUCTURAL RAILS
AND CARRIERS
TESTING, ANALYSIS
AND DESIGN

TECHNICAL REFERENCE
OPTICAL TABLES
BREADBOARDS
AND GRID PLATFORMS
HONEYCOMB, GRANITE
AND RIGID STRUCTURES
ISOLATORS
WORKSTATIONS AND
ISOLATED PLATFORMS
STRUCTURAL RAILS
AND CARRIERS
TESTING, ANALYSIS
AND DESIGN
1056
Optical Tables and Vibration Control
NewDamp ND20 and ND30 Series
These isolators are based on conical elastic elements. They provide almost equal
isolation in vertical and horizontal directions. Within the same design envelope, they
provide stiffer, higher load (ND30-A); and softer, lower load (ND20-A) options. By using
custom profiled upper supports, these isolators can be easily tuned to particular
load/frequency requirements.
Specifications
Dimensions
Model ND20-A
4.50
(114.3)
A
A
4.50
(114.3)
B B
4.30
(109.2)
Model ND30-A
4.50
(114.3)
A
A
A
4.50
(114.3)
B B
A
4.30
(109.2)
CLEARANCE FOR M6
M6 X 1.0 3 PL
A
A
Model (Metric)
ND20-A (M-ND20-A)
CLEARANCE FOR M6
M6 X 1.0 3 PL
2.50
(63.5)
SECTION A-A
2.50
(63.5)
SECTION A-A
3.28
(83.2)
Dimensions [in. (mm)]
Model (Metric) A B
ND20-A (M-ND20-A) 4.00 (100.0) 1.50 (37.5)
ND30-A (M-ND30-A) 4.00 (100.0) 1.50 (37.5)
3.28
(83.2)
Model (Metric)
ND30-A (M-ND30-A)
Load per Isolator [lb (kg)] 45 (20)–250 (115) 70 (30)–300 (135)
Load Range (set of 4) [lb (kg)]
Natural Frequency (Hz)
180 (80)–1000 (460) 280 (120)–1200 (540)
Vertical 9–12 10–15
Horizontal 8–10 9–12
Height, Isolator [in. (cm)] 3.28 (8.3) 3.28 (8.3)
Base Dimension [in. (cm)] 4.5 x 4.5 (11.4) 4.5 x 4.5 (11.4)
Interface Compatability Breadboard, Microlock Breadboard, Microlock
Phone: 1-800-222-6440 • Fax: 1-949-253-1680
ND30-A NewDamp Elastomeric Isolator.
Customized ND20 NewDamp Elastomeric
Isolator.
LOAD (lb)
FREQUENCY (Hz)
200
150
100
50
30
20
10
ND20-A
ND30-A
0 0 0.2 0.4 0.6
DEFLECTION (in.)
ND20-A
ND30-A
0
0 50 100 150 200 250
LOAD (lb)

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

TECHNICAL REFERENCE
OPTICAL TABLES
BREADBOARDS
AND GRID PLATFORMS
HONEYCOMB, GRANITE
AND RIGID STRUCTURES
ISOLATORS
WORKSTATIONS AND
ISOLATED PLATFORMS
STRUCTURAL RAILS
AND CARRIERS
TESTING, ANALYSIS
AND DESIGN
1058
Optical Tables and Vibration Control
Dimensions
Model ND40-A
3.0
(76.2)
2.63
(66.7)
A
A
3.0
(76.2)
A
2.48
(63.0)
A
CLEARANCE FOR M6
M6 X 1.0
2.48
(63.0)
ø 2.75
(69.9)
2.50
(63.5)
SECTION A-A
Dimensions [in. (mm)]
Model (Metric) A B
ND40-A (M-ND40-A) 2.00 (50.0) 1.00 (25.0)
ND40-B (M-ND40-B) 2.00 (50.0) 1.00 (25.0)
Model ND41-A
3.00
76.2)
2.25
(57.2)
A
A
3.00
(76.2)
A
2.48
(63.0)
CLEARANCE FOR M6
M6 X 1.0
2.75 DIA
(69.9)
2.50
(63.5)
SECTION A-A
Dimensions [in. (mm)]
Model (Metric) A B
ND41-A (M-ND41-A) 2.00 (50.0) 1.00 (25.0)
ND41-B (M-ND41-B) 2.00 (50.0) 1.00 (25.0)
Model ND40-B
2.50
(63.5)
2.63
(66.7)
2.50
(63.5)
Model ND41-B
2.50
(63.5)
2.25
(57.2)
Phone: 1-800-222-6440 • Fax: 1-949-253-1680
A
A
A
A
A
2.50
(63.5)
A
CLEARANCE FOR M6
M6 X 1.0
A
A
M6 X 1.0
2.75 DIA
(69.9)
CLEARANCE FOR M6
2.75 DIA
(69.9)
2.50
(63.5)
SECTION A-A
2.50
(63.5)
SECTION A-A

NewDamp ND50 Series
Model ND50-A
2.4
(61.0)
REF
1.3 (33.0)
REF
B
A
A
A
Optical Tables and Vibration Control
These isolators are based on conical elastic elements designed for low load applications.
The ND50 supports loads up to 40 lbs.
Specifications
Load per Isolator [lb (kg)]
Model (Metric)
ND50-A (M-ND50-A)
17 (8)–28 (13)
Load Range (set of 4) [lb (kg)]
Natural Frequency (Hz)
68 (32)–112 (50)
Vertical