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Shaft
Speed
Whenever a choice exists, seal on the
smallest diameter of the shaft, to minimize friction and reduce surface speed.
The following recommendations are for shaft speeds of 50-900 FPM (15.2-274.3
M/Min). Shaft speeds of less than 50 FPM (15.2 M/Min) should be treated as
reciprocal applications.
FPM = (Shaft diameter x 3.14 x RPM) /
12
M/Min = Shaft diameter (in meters) x 3.14 x RPM
Surface
Finish
Surface finish in the groove should be
63-85 RMS (1.62.16µm), and 20-24 RMS (.5-.6µm) on the shaft.
Materials
Our Compounds
525K and 525L are recommended for rotary applications. These nitrile
formulations offer excellent abrasion resistance and are compatible for use with
most hydraulic fluids. 525K is generally used in applications to 300 PSI (20.7
Bar), while 525L is preferred for pressures of 300-750 PSI (20.7-51.7 Bar). For
applications involving special fluids or extreme operating conditions, contact
our Product Design Group.
Specialized Seals for Demanding
Applications
Each rotary application is
unique, often involving media other than oil, or extreme conditions of
temperature, pressure, or friction. Special seals are available to meet these
demanding requirements.
Contact your
Pressure Seals representative for more
information.
Recommended Starting Dimensions
for Rotary Applications
| Shaft
Diameter |
|
Cross-section |
Grove
Diameter |
Axial
Groove
Length |
| (in.) |
(mm) |
Four-lobed
Seal
No. |
(in.) |
(mm) |
(in.) |
(mm) |
(in.) |
(mm) |
| .125 |
3.175 |
Q4007 |
.707 |
1.778 |
.260/.258 |
6.604/6.553 |
.085/.080 |
2.159/2.032 |
| .156 |
3.962 |
Q4008 |
.070 |
1.778 |
.292/.290 |
7.417/7.366 |
.085/.080 |
2.159/2.032 |
| .188 |
4.775 |
Q4009 |
.070 |
1.778 |
.323/.321 |
8.204/8.153 |
.085/.080 |
2.159/2.032 |
| .218 |
5.537 |
Q4010 |
.070 |
1.778 |
.355/.353 |
9.017/8.966 |
.085/.080 |
2.159/2.032 |
| .250 |
6.350 |
Q4011 |
.070 |
1.778 |
.385/.383 |
9.779/9.728 |
.085/.080 |
2.159/2.032 |
| Call |
|
Q4012 |
|
|
|
|
|
|
| .312 |
7.925 |
Q4110 |
.103 |
2.616 |
.513/.511 |
13.030/12.979 |
.115/.110 |
2.921/2.794 |
| .375 |
9.525 |
Q4111 |
.103 |
2.616 |
.576/.574 |
14.630/14.579 |
.115/.110 |
2.921/2.794 |
| .437 |
11.100 |
Q4112 |
.103 |
2.616 |
.636/.638 |
16.154/16.205 |
.115/.110 |
2.921/2.794 |
| .500 |
12.700 |
Q4113 |
.103 |
2.616 |
.701/.699 |
17.805/17.754 |
.115/.110 |
2.921/2.794 |
| .562 |
14.275 |
Q4114 |
.103 |
2.616 |
.763/.761 |
19.380/19.329 |
.115/.110 |
2.921/2.794 |
| .625 |
15.875 |
Q4115 |
.103 |
2.616 |
.826/.824 |
20.980/20.929 |
.115/.110 |
2.921/2.794 |
| .750 |
19.050 |
Q4117 |
.103 |
2.616 |
.951/.949 |
24.155/24.104 |
.115/.110 |
2.921/2.794 |
| .812 |
20.625 |
Q4118 |
.103 |
2.616 |
1.013/1.011 |
25.730/25.679 |
.115/.110 |
2.921/2.794 |
| .875 |
22.225 |
Q4119 |
.103 |
2.616 |
1.076/1.074 |
27.330/27.280 |
.115/.110 |
2.921/2.794 |
| 1.000 |
25.400 |
Q4121 |
.103 |
2.616 |
1.201/1.199 |
30.505/30.454 |
.115/.110 |
2.921/2.794 |
| 1.062 |
26.975 |
Q4122 |
.103 |
2.616 |
1.263/1.261 |
32.080/32.029 |
.115/.110 |
2.921/2.794 |
| 1.125 |
28.575 |
Q4123 |
.103 |
2.616 |
1.326/1.324 |
33.680/33.630 |
.115/.110 |
2.921/2.794 |
| 1.187 |
30.150 |
Q4124 |
.103 |
2.616 |
1.388/1.386 |
35.255/35.204 |
.115/.110 |
2.921/2.794 |
| 1.250 |
31.750 |
Q4125 |
.103 |
2.616 |
1.451/1.449 |
36.855/36.804 |
.115/.110 |
2.921/2.794 |
| 1.312 |
33.325 |
Q4126 |
.103 |
2.616 |
1.513/1.511 |
38.430/38.379 |
.115/.110 |
2.921/2.794 |
| 1.375 |
34.925 |
Q4127 |
.103 |
2.616 |
1.576/1.574 |
40.030/39.979 |
.115/.110 |
2.921/2.794 |
| 1.500 |
38.100 |
Q4129 |
.103 |
2.616 |
1.699/1.701 |
43.154/43.205 |
.115/.110 |
2.921/2.794 |
| 1.750 |
44.450 |
Q4133 |
.103 |
2.616 |
1.951/1.949 |
49.555/49.504 |
.115/.110 |
2.921/2.794 |
| 2.000 |
50.800 |
Q4137 |
.103 |
2.616 |
2.202/2.199 |
55.930/55.854 |
.115/.110 |
2.921/2.794 |
To calculate groove diameter for shaft sizes not listed, select the Series 4
seal with an I.D. one size larger than the shaft in question. Start with a
minimum shaft diameter. Add to that two times the minimum cross-section of the
seal, and subtract .002 (.05mm) for tolerance.
Example: QUAD-RING seal cross-section of .139±.004 (3.53±.10mm) and
shaft diameter of 1.118±.001 (28.4±.025mm).
These calculations are for hydraulic and lubrication oils only. For other
media such as air or water, or for larger sizes, contact one of our Product
Engineering Teams.
Information Provided by Minnesota Rubber/Quadion Corporation, copyright 2002
® Product names are Registered
trademarks of Minnesota Rubber, A Quadion Company.
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