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| How to cut cones for steam fitting unions. |
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| David Jupp:
In very high pressure fittings, a 60 degree female cone (standard centre drill) is mated with a 59 degree male cone - this gives a line contact where the male and female meet, resulting in a high contact pressure. I'm not suggesting you need to follow this principle, but if any uncertainty about the angle of the male cone, it's best to aim for a touch under 60 degrees, rather than allowing it to exceed 60 degrees. |
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