Alan:
Would you know how far up from tip that they reinforce the shaft?, thanks for the good info.
HStill
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But the torsional and shear strength of the graphite composite is lower than steel, which is why shaft manufacturers add additional material on the i.d. of the shaft near the tip so that the thicker material is stronger (particularly in shear). Coning lowers the risk of a sharp edge that will cause a stress concentration on the shaft (it's a 45* edge instead of a 90* edge with the risk of a burr). Filling the coning with epoxy will likely strengthen the tip very, very little -
