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  Shaft and Housing Recommendation  
 
   
(1)SHAFT:
Seven parameters make the seal and shaft more compatible and assist in providing optimal seal performance.
*SHAFT DESIGN RECOMMENDATION:


 

      Table-1
SHAFT DIAMETER TOLERANCE
 up to 4.000 shaft   .003
 4.00 1 to 6.00 shaft   .004
 6.001 to 10.000 shaft  .005
* Shaft Speed-Important factor in seal selection.
* Temperature- For extreme temperatures, special compounds can be used.
* Pressure- Where pressure above nominal press-fit, special seals should be used or pressure against sealing lip relieved.
* Grinding-Rotating Shaft: plunge grinding is recommended. Reciprocating Shaft: centerless grinding is acceptable.
* Shaft Hardness-Normally seals contact area of the shaft should be Rockwell C 45 minimum.
* Shaft to Bore Misalignment: Fixed misalignment of center of shaft with bore center concentrates wear at one side of the seal which becomes more severe as speed increases.
* Shaft Run-out-Run-out ( eccentricity or shaft whip ) should keep to absolute minimum creates difficult sealing problem.
   
 
TABLE-2 TABLE-3
Pressure Limits Eccentricity Limits
Shaft speed-FPM  Maximum Pressure-PSI Speed Range Max Misalignment Max Shaft      Run-out
0-1000 7 0-800RPM 0.015 in ECC 0.025 in TIR
1001-2000 5 800-2200RPM 0.010 in ECC 0.020 in TIR
2001 and Higher 3 2200-4200RPM 0.010 in ECC 0.015 in TIR

 
 
(2)HOUSING BORE:
The different material of bores is to be recommended using in rubber covered and metal O.D seals as followed: Robber covered O.D: steel and cast iron, soft alloy, aluminum alloy, plastic or nylon.
Metal O.D: steel and cast iron
 
 
*BORE DESIGN RECOMMENDATION:

BORE CHAMFER:

To assist installation of the seal, a bore chamfer is necessary. If without or improper chamfer will distort seal case and will require more assembly force craving is our recommendation of the chamfer.

on shaft