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| awemawson:
A little more investigation on the "O Ring Seal" leads me to believe it probably wasn't originally an O ring, as the cross section is rather rectangular. But this may be due to age (1972 remember) and over heating. The groove that it sits in is 4.14 mm wide, has a minor diameter of 84.46 mm and the bore that it seals in is 90.75 - not many standards there !! So if it had a 3 mm cord O ring 2 x 3.00 plus 84.46 gives 90.46 o/d - too small to seal If it had a 4 mm cord O ring 2 x 4.00 plus 84.46 gives 92.46 o/d and probably too big to enter the bore If it had 1/8" cord (3.18 mm) 2 x 3.18 plus 84.46 gives 90.82 which is a possibility though slightly on the small size I'll try and get the real thing, but I've ordered a 4 mm cord 83 mm O ring reasoning if it is stretched to fit the groove it's cord diameter will shrink a bit ad it may fit - after all it just needs to go n once, it's not a rotating or constantly sliding fit. Meanwhile I've drawn up the two gaskets needed and cut them on the laser cutter. Samples are gasket material but to ones I use will be a bit thicker - this are just 'trial fits' to prove the drawings. |
| John Rudd:
Those gaskets look the bizz..... :bow: You could have a little sideline in gasket supply..... :lol: |
| awemawson:
Yes I was rather pleased how they came out, and only took 20 minutes. A quick draw in Autocad, having measured up, learnt how to place '3 point arcs' and 'Tangent Snap' for the sides of the four hole gasket, then export as .DXF's to RDWorks which is the laser driver and bobs your Uncle :thumbup: |
| PekkaNF:
Nice gasket! Does that heater mounts onto oil/water heat exhanger? That would be nifty place to heat both oil and water. Pekka |
| awemawson:
Yes it points forwards toward the tube pack and is immersed in the water. |
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