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At this point in time, I think it makes most sense to move forward with Option 6453K153. Its bore radius is ~0.5 in, which is marks approximately the bottom 1/3 of the reasonable range I previously calculated. Things I will need to check are:
- Ensuring safe transfer of load at the payload bulkhead if only using 2 bolts and a reduced thickness of endplate.
- Ensuring that taken together, the 4 tie rods could theoretically take all 360lbs of force in compression/tension (I want to cover all my bases here).
- Check thread pullout/break strength at the connection between the tie rod and the diaphragm
- Check rod buckling strength with steel (and aluminum since we might change to aluminum)
Selected Piston Dimensions and Improvements
The relevant dimensions and properties of 6453K119 6453K153 are enumerated in the table below:
| Bore Diameter (in) | Bore Material | Stroke Length (in) | Rod Material | Rod Diameter (in) | Total Length (baseplate to baseplate; in) |
|---|---|---|---|---|---|
| 0.51-1/8" | Aluminum | 5.5 | 303 Stainless Steel | 13/48" | 7.5" |
Given a 4.5" coupling section, this gives us a 1" margin on separation distance.
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