SEAL SPECIFICATION GUIDE
SEAL SPECIFICATION GUIDE SEAL SPECIFICATION GUIDE
SEAL SPECIFICATION GUIDE OPERATING CONDITIONS Seal with Spring 8 DESIGN LIMITATIONS SHAFT NITRILE LIP MAXIMUM MAXIMUM CONTINUOUS MAXIMUM TOTAL DIAMETER CONTINUOUS SHAFT SPEED PRESSURE ECCENTRICITY General 3,500 rpm 5 psi .020” .500 7,000 rpm 5 psi .004” 1.500 6,000 rpm 5 psi .006” 2.500 4,000 rpm 5 psi .010” 3.500 3,500 rpm 5 psi .013” 4.500 2,600 rpm 5 psi .017” NOTE: Higher shaft speed is possible using higher temperature materials such as polyacrylate, fluoroelastomer or silicone. Slightly higher continuous pressure is possible for shaft speeds below 200 fpm. Higher eccentricity is allowable if shaft speed is reduced. Seal without Spring DESIGN LIMITATIONS SHAFT MAXIMUM MAXIMUM CONTINUOUS MAXIMUM TOTAL DIAMETER SHAFT SPEED PRESSURE ECCENTRICITY General 2,000 rpm 4 psi .005” .500 3,500 rpm 4 psi .003” 1.500 2,500 rpm 4 psi .005” 2.500 2,100 rpm 4 psi .006” 3.500 1,500 rpm 4 psi .008” 4.500 1,200 rpm 4 psi .010” NOTE: Higher eccentricity is allowable if maximum shaft speed is reduced. A nonsprung seal design offers a cost effective way to seal high viscosity grease applications. Because the design does not benefit from the constant load of a garter spring, the allowable eccentricity is decreased and the fluids to be sealed are limited.
OPERATING CONDITIONS Eccentricity Shaft Centerline Rotation Path de Shaft 2de=T.I.R. RUNOUT (T.I.R.) de=Dynamic Eccentricity Center of Rotation Eccentricity is determined by measuring the shaft runout, TIR and the shaft-to-bore misalignment. Combine the two results for the total eccentricity the seal lip must follow to function effectively. As eccentricity increases, and/or shaft speed increases, it becomes more difficult for the lip to follow the shaft. Shaft Center of Rotation SHAFT TO BORE MISALIGNMENT Bore Centerline Housing Bore 9
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- Page 3 and 4: TABLE OF CONTENTS SECTION. . . . .
- Page 5 and 6: SEAL DESIGN/TYPES 10S 20S 50S 40S 7
- Page 7 and 8: SHAFT RECOMMENDATIONS Shafts Seal a
- Page 9: BORE RECOMMENDATIONS Bore Diameter
- Page 13 and 14: MATERIAL SELECTION General Elastome
- Page 15 and 16: IMPROPER METHOD OF SEAL INSTALLATIO
- Page 17 and 18: KWIK-SLEEVE TM - COMPONENTS Put the
- Page 19 and 20: Part Part Shaft Bore O.D. Width Num
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<strong>SEAL</strong> <strong>SPECIFICATION</strong> <strong>GUIDE</strong><br />
OPERATING CONDITIONS<br />
Seal with Spring<br />
8<br />
DESIGN LIMITATIONS<br />
SHAFT NITRILE LIP MAXIMUM MAXIMUM CONTINUOUS MAXIMUM TOTAL<br />
DIAMETER CONTINUOUS SHAFT SPEED PRESSURE ECCENTRICITY<br />
General 3,500 rpm 5 psi .020”<br />
.500 7,000 rpm 5 psi .004”<br />
1.500 6,000 rpm 5 psi .006”<br />
2.500 4,000 rpm 5 psi .010”<br />
3.500 3,500 rpm 5 psi .013”<br />
4.500 2,600 rpm 5 psi .017”<br />
NOTE: Higher shaft speed is possible using higher temperature materials such as polyacrylate, fluoroelastomer<br />
or silicone. Slightly higher continuous pressure is possible for shaft speeds below 200 fpm. Higher eccentricity<br />
is allowable if shaft speed is reduced.<br />
Seal without Spring<br />
DESIGN LIMITATIONS<br />
SHAFT MAXIMUM MAXIMUM CONTINUOUS MAXIMUM TOTAL<br />
DIAMETER SHAFT SPEED PRESSURE ECCENTRICITY<br />
General 2,000 rpm 4 psi .005”<br />
.500 3,500 rpm 4 psi .003”<br />
1.500 2,500 rpm 4 psi .005”<br />
2.500 2,100 rpm 4 psi .006”<br />
3.500 1,500 rpm 4 psi .008”<br />
4.500 1,200 rpm 4 psi .010”<br />
NOTE: Higher eccentricity is allowable if maximum shaft speed is reduced.<br />
A nonsprung seal design offers a cost effective way to seal<br />
high viscosity grease applications. Because the design does<br />
not benefit from the constant load of a garter spring, the<br />
allowable eccentricity is decreased and the fluids to be<br />
sealed are limited.
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