Spring-loaded metal-cased double-lip oil seal

BS


Spring-loaded metal-cased double-lip oil seal

Premium spring-loaded double-lip rotary shaft seal with precision ground metal OD. Used for oil or grease retention.

This type is also the most economical design for general-purpose rotary sealing applications. An optimized seal lip with a garter spring maintains a constant radial lip force for optimum sealing.  The metal case is exposed to the elements and to the fluid, however, the application of an optional sealant coating to the case improves both static sealing and corrosion resistance between the housing and the seal OD.  The secondary lip serves as both an effective protection against light airside contaminants and as a lube retainer. Maximum service life can be achieved by applying a suitable lubricant between the two sealing lips. For medium and heavy duty dirt exclusion see ADG or AJ multy-lip design oil/grease seals.




Operating Range
MaterialContinuous PressureMax. Pressure SpikeTemperatureSurface Speed
Duralast 8838-LF3psi (0.2bar)7psi (0.5bar)-4 to 392°F (-20 to 200°C)Up to 5,000 fpm (25m/s)
Duralast 5117-LF3psi (0.2bar)7psi (0.5bar)-13 to 212°F (-25 to 100°C)Up to 1,800 fpm (9m/s)
Fluoroelastomer (FKM),Viton®3psi (0.2bar)7psi (0.5bar)-4 to 392°F (-20 to 200°C)Up to 4,000 fpm (20m/s)
Nitrile (NBR)3psi (0.2bar)7psi (0.5bar)-13 to 212°F (-25 to 100°C)Up to 1,600 fpm (8m/s)
Size Table (Inch)Standard sizes listed below are preferred sizes for new design applications; however, we offer any other seal size as required. Seals are available for any shaft diameter size in 0.001 inch increments, including Functional Range.
A
Shaft Diameter
CS
Cross-section
D
Bore Diameter
LF
C
Chamfer
R1
Radius
Standard RangeFunctional RangeTolerance*D=ToleranceTol. +0.010/-0min.max.
0.200-0.599"0.200 - 5.000"+/-0.0033/16A + 0.375+/-.0010.2620.2100.0400.020
0.600-1.299"0.200 - 6.000"+/-0.0031/4A + 0.500+/-.0010.262
0.210
0.050
0.020
1.300 - 2.299"
0.200 - 7.000"
+/-0.003
5/16
A + 0.625
+/-.001
0.325
0.265
0.050
0.020
2.300 - 3.299"
0.250 - 10.000"
+/-0.003
3/8
A + 0.750
+/-.001
0.387
0.300
0.060
0.020
3.300 - 7.999"
0.500 - 15.000"
+/-0.004
1/2
A + 1.000
+/-.0015
0.512
0.425
0.090
0.030
8.000 - 15.999"1.000 - 63.000"+/-0.0053/4A + 1.500+/-.0020.6370.5300.1300.030
16.000 - 30.999"1.000 - 63.000"+/-0.0063/4A + 1.500+/-.0030.6370.5300.1500.030
31.000 - 63.000"
consult with Ahpseals engineering
*Standard cross-sections (CS) listed and non-standard sizes can be provided for any shaft size up to 63 inches.
Surface finish: Shaft (A) plunge ground, zero lead, Ra 8-16µin - Housing (D,L) Ra 32-63µin.
Shaft material hardness min. RC45. See Technical Info for more specific information.

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