"Industrial Cushion Systems"  A division of "Kunz Industries" 15800 Suntone Drive South Holland, Illinois  708-596-7704 (fax 708-596-7725)
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Universal Cushion Rest Blocks

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Engineer Data Sheet

Physical Properties

POLYURETHANE

 Hardness, Shore A 60 40
 100% Modulus, psi (MPa) 275 (1.9) 135 (0.9)
 300% Modulus, psi (MPa) 525 (3.6) 285 (2.0)
 Tensile Strength, psi (MPa) 4485 (31) 1485 (10)
 % Elongation 510 555
 Tear, Die C, pli (kN/m) 190 (33) 125 (21)
 Tear, D-470-Split (kN/m) 20 (3.5) 9 (1.5)
 Bashore Reilience 23 34

 

 % Volume Swell, One Week    
 Ethyl Acetate 138 131
 Toluene 75 43
 5% Phosphoric Acid 1.7 1.0

 

Oil, Chemical and Solvent Resistance

CHEMICAL RATING CHEMICAL RATING CHEMICAL RATING
Acetone C Carbon Dioxide A Carbon Monoxide A
Ethyl Alcohol C FREON-11 B FREON-12 A
FREON-22 C Fuel oil B Gasoline B
Glue A Hydraulic oils B Hydrochloric Acid 20% B
Isopropyl ether B Kerosene C Lacquer Solvents X
Lubricating oils B Methyl alcohol C Methyl ethyl ketone C
Mineral oil A Naphtha B Perchlorethylene C
SAE #10 Oil 158F A Soap solutions A Sulfuric acid -> 50% X
Toluene C Trichlorethylene C Turpentine C
Water 122F A        

A - Little of no effect
B - Minor to moderate effect
C - Severe effect to complete destruction
X - No data but most likely to be unsatisfactory

 

Hardness Comparison Chart

ICS STANDARD CUSHION BLOCKS        
                              Patented

NOTE: CUSHION PATTERN CHANGES WITH SIZE

1/4-20 TAPPED HOLE

PART NO. A B C D DURO COMMENTS LBS. TO COMPRESS
.100 .200
STD-202015-40 2" 1-1/2" 3/8" 1-3/4" 40-A   15 25
STD-202015-60 2" 1-1/2" 3/8" 1-3/4" 60-A   35 65
STD-202020-40 2" 2" 3/8" 1-3/4" 40-A   15 25
STD-202020-60 2" 2" 3/8" 1-3/4" 60-A   35 65
STD-202030-40 2" 3" 1/2" 1-3/4" 40-A   25 55
STD-202030-60 2" 3" 1/2" 1-3/4" 60-A   35 135
STD-303015-40 3" 1-1/2" 3/8" 2-3/4" 40-A   25 55
STD-303015-60 3" 1-1/2" 3/8" 2-3/4" 60-A   65 135
STD-303020-40 3" 2" 1/2" 2-3/4" 40-A   25 55
STD-303020-60 3" 2" 1/2" 2-3/4" 60-A   65 135
STD-303030-40 3" 3" 1/2" 2-3/4" 40-A   25 55
STD-303030-60 3" 3" 1/2" 2-3/4" 60-A   65 135
STD-404015-40 4" 1-1/2" 3/8" 3-3/4" 40-A   50 95
STD-404020-60 4" 1-1/2" 3/8" 3-3/4" 60-A   115 225
STD-404020-40 4" 2" 1/2" 3-3/4" 40-A   50 95
STD-404020-60 4" 2" 1/2" 3-3/4" 60-A   115 225
STD-404030-40 4" 3" 1/2" 3-3/4" 40-A   50 95
STD-404030-60 4" 3" 1/2" 3-3/4" 60-A   115 225
STD-404040-40 4" 4" 1/2" 3-3/4" 40-A   50 95
STD-404040-60 4" 4" 1/2" 3-3/4" 60-A   115 225
                 
                 

 

ICS STANDARD CUSHION BLOCKS        
                              Patented

NOTE: CUSHION PATTERN CHANGES WITH SIZE

MULTIPLY THE LENGTH OF THE BLOCK WITH
THE CORRESPONDING WEIGHT ON THE CHART
TO OBTAIN THE DESIRED CUSHION BLOCK

 

PART NO. A B C D DURO COMMENTS LBS/LINEAR INCH TO COMPRESS
.100 .200
UNI-201524-40 2" 1-1/2" 3/8" 1-3/4" 40-A   7.5 12
UNI-201524-60 2" 1-1/2" 3/8" 1-3/4" 60-A   17 32
UNI-202024-40 2" 2" 3/8" 1-3/4" 40-A   7.5 12
UNI-202024-60 2" 2" 3/8" 1-3/4" 60-A   17 32
UNI-203024-40 2" 3" 1/2" 1-3/4" 40-A   7.5 12
UNI-203024-60 2" 3" 1/2" 1-3/4" 60-A   17 32
UNI-203024S-40 2" 3" 1/2" 1-3/4" 40-A

EXTRA CUSHION

4.5 7
UNI-203024S-60 2" 3" 1/2" 1-3/4" 60-A

EXTRA CUSHION

9.5 18
UNI-301524-40 3" 1-1/2" 3/8" 2-3/4" 40-A   9.6 20.8
UNI-301524-60 3" 1-1/2" 3/8" 2-3/4" 60-A   18.8 43.5
UNI-302024-40 3" 2" 1/2" 2-3/4" 40-A   9.6 20.8
UNI-302024-60 3" 2" 1/2" 2-3/4" 60-A   18.8 43.5
UNI-303024-40 3" 3" 1/2" 2-3/4" 40-A   9.6 20.8
UNI-303024-60 3" 3" 1/2" 2-3/4" 60-A   18.8 43.5
UNI-401524-40 4" 1-1/2" 3/8" 3-3/4" 40-A   12.5 23.7
UNI-401524-60 4" 1-1/2" 3/8" 3-3/4" 60-A   29 56.3
UNI-402024-40 4" 2" 1/2" 3-3/4" 40-A   12.5 23.7
UNI-402024-60 4" 2" 1/2" 3-3/4" 60-A   29 56.3
UNI-403024-40 4" 3" 1/2" 3-3/4" 40-A   12.5 23.7
UNI-403024-60 4" 3" 1/2" 3-3/4" 60-A   29 56.3
UNI-404024-40 4" 4" 1/2" 3-3/4" 40-A   12.5 23.7
UNI-404024-60 4" 4" 1/2" 3-3/4" 60-A   29 56.3

 

 


ICS COMPRESSION DATA
PATENTED

2" UNIVERSAL CUSHION BLOCK
UNI-201524, UNI-202024, UNI-203024




 

ICS COMPRESSION DATA
PATENTED

3" UNIVERSAL CUSHION BLOCK
UNI-301524, UNI-302024, UNI-303024


ICS COMPRESSION DATA
PATENTED

STANDARD CUSHION BLOCK