
SPRING MOUNTS
Damped Type – To 1235 lbs.
www.vibrationmounts.com • Phone: 516.328.3662 • FAX: 516.328.3365


V100 page 512 


MOUNTING PLATE:
Mild Steel, Painted
SPRING:
HighTensile Steel; Phosphated & Dyed Black
ISOLATOR:
Knitted Stainless Steel Mesh
FOR LOADS OF:
66 to 1235 Pounds (30 to 560 kgf)
TEMPERATURE RANGE:
94°F to +347°F (70°C to +175°C)
APPLICATIONS:
• HEAVY LOADS
• COMPRESSORS 
• PUMPS
• GRAIN VIBRATORS 
• CORROSIVE ENVIRONMENT
• STAINLESS STEEL MESH
CHARACTERISTICS:
Lateral to vertical stiffness ratio approximately 1:1.
Elastic Limit corresponds to a maximum load in
compression of .042 oz. (1.2 g) and radially .007 oz. (0.2 g).
Damping factor c/c_{o} .10 to .15
MOUNTING:
Must be loaded vertically through its axis.

NOTE: Dimensions in ( ) are mm. 

CLICK CATALOG NUMBER TO CHECK PRICE AND AVAILABILITY. 
INDUSTRIAL AND MARINE APPLICATIONS
The following table gives recommended isolation efficiency in relation to site configuration and driving motor power. If site configuration is not known, assume for basement condition. Transfer the recommended efficiency to the transmissibility curves on the graph.
Driving
Motor, kW 
Recommended Isolation Efficiency: 
Basement or Ground
Floor 
Upper Floor
Heavy Construction 
Upper Floor
Light Construction 
Up to 4
4 – 10
10 – 30
30 – 75
75 – 225 
—
50%
80%
90%
95% 
50%
75%
90%
95%
97% 
90%
93%
95%
97.5%
98.5% 

EXAMPLE
Project a line from the efficiency required on the right hand side to intersect the performance lines 1008, 1006 and 1004. Project those intersections down to obtain the two dimensionless ratios (R) for the three mountings. Divide the lowest running speed (Hz) of the complete machine by R to give the natural frequency f'_{n} required. Compare f'_{n} with the actual natural frequency (f_{n}) of the mounting concerned . If f'_{n} fits into the fn band of the mounting, select that mounting. If two mountings meet the above conditions, select the one with higher f_{n}; it will be more stable.
A fan turning at 980 rpm (16.3 Hz) driven by a 7 kw motor running at 1470 rpm, which is to be installed on an upper floor of light construction: 




