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Engineering / Tolerance
| Standard Nomenclature & Structure: |
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| Free Length (Unloaded) |
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| Range |
Tolerance |
.375"-1.000"
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+/- .015 |
| 1.001"-2.250" |
+/- .025 |
| 2.251"-3.500" |
+/- .045 |
| 3.501"-4.500" |
+/- .055 |
| 4.501"-5.500" |
+/- .065 |
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| Outside Diameter O.D. |
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| O.D.'s are specified to fit a holesize and a minimum clearance of .005 is maintained when the spring is deflected to solid, as the hole size increases the clearance increases up to .050" |
| Load at Solid Length |
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Approximate load when spring is fully compressed to solid length
Load @ Solid is +/- 10% |
| Rate (Expressed #/ Inch) |
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This is the Springs Constant if Deflected or traveled 1.0²
Spring Rate is +/- 10% |
| Wire Size |
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| Wire size is not listed and is reference only. |
| Solid Length |
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(When all coils are closed together by compressing)
Solid length is +/- 10%
Note: Not Specified attained by subtracting the travel from the free length. |
| Spring Life |
| Note: We make no claim or Warranty With regard to Spring life. This information is solely based on known engineering and Design Information and is an attempt to aid the user in his or her application only. |
| Static Service: |
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| If used with no more than 60% of available travel approximately 1,000,000 cycles can be obtained. |
| Dynamic Service: |
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| If used with no more than 30% of Available travel approximately 1,000,000 Cycles can be obtained. |
| How to Determine Spring Rate |
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| To help select spring Requirement from stock list, follow this example |
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1. Example:
Load required is 20lbs. force and movement or travel is 1/2" (.500") Spring must fit in a 1/2" (.500") hole and over a 5/16" (.312") Rod.
First Load = 20 #
Travel/Deflection = .500" (1/2") |
| Rate = |
Load
(Travel) Deflection |
20
.50 |
= 40 |
Therefore: Rate = 40 #/ Inch
Then Find 1/2" (.500") hole size and look under Light, Medium or Heavy and find 40 #/ Inch Rate Stock Number C500-175M. Additionally this stock number C500-175M Works over a 5/16" (.312") Rod, will travel (Deflect) Approximately .894" and yield a total Load of 36.5lbs. approx. at solid length, and is 1.75" long in the free position. |
| Conversion English / Metric |
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To Convert:
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To: |
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Multiply by: |
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Pounds
Inch |
#/(IN) |
Newtons
Millimeter |
(N)/(mm) |
x.1754 |
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| Millimeters (mm) |
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Inches (In) |
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x .03937 |
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| Pound (#) |
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Newtons (N) |
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x 4.4482 |
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°F-32
1.8 |
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| °F (Fahrenheit) |
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°C (Centigrade) |
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=°C |
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Explanation of formula for F° -> C°
Take Fahrenheit in degrees ° and subtract - 32° then divide by 1.8; The result will equal Centigrade.
For Centigrade to Fahrenheit: C° x 1.8 + 32 = F°
To do this multiply Degrees C° by 1.8 then Add 32 to the results for F° (Degrees Fahrenheit.)
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| HELP |
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| If you or your Engineering Department require help, with fit or requirement, we will be glad to assist with Design help or part recommendation. |
| Spring Selection Note |
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| When selecting a Spring Load Requirement; remember that you may use the next smaller O.D. Spring or the next larger Rod Size Spring. The selection guide is set up so as there is an in between load or Rate one size up or one size down. Nominal O.D. and I.D. of Spring changes .030 -.050 inch from one hole or rod size to the next. In most cases a suitable fit can be found for almost any Load or Rate Range Desired. |
| Series |
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"Stacking Spring in series, end to end."This can be done when a longer length is required.
Note: It is recommended that stacked springs be guided on O.D or I.D.
In series stacked on top of each other the spring rate is reduced; But the Deflection or travel is increased Times the number of Springs.
The Rate resultant would be:
Rate
= New Rate
No. Of Springs NOTE: The Total load would remain the same as one Spring
The Deflection or Travel becomes:
(No. Of Springs) X (Travel) = New Total Travel(defl.)
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| Parallel |
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When Springs are grouped side by side or in a cluster, the travel or deflection remain the same as one spring; But the load increases in direct proportion to the number of springs in the cluster.
(No. of Springs) X (Load @ Solid) = New Load @ Solid |
| Maximum Recommended Travel |
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| For reasonable life expectancy and dependable load performance it is not recommend to consistently deflect or travel the spring more than 85% of the maximum travel. |
| Corrosive Environments |
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| Highly Corrosive environments are outside the scope of stock springs. We suggest that you contact us about custom springs made from Inconel,Titanium, or other suitable material for highly corrosive environments. |
| Temperature |
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| This is an area that our product is exceptionally well suited for. |
| Heat |
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Up to 550° F with minor Load Loss
Up to 700° F with measurable Load Loss |
| Cold |
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Crygenic Application usable down to
-325° F |
Warranty All parts are warranted against manufacturing defects. We will replace at our expense, freight prepaid to our customer any part returned with-in 60 Days; that has failed in any way due to normal use. Our liability is limited to the replacement of the part that we provided; that was found to be defective due to the manufacturing process that is under our control.
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