If someone has a split knob in hand, please look
closely at the tapped hole. Since there seem to
be so many knobs splitting, I'm wondering if the
manufacturer has inadvertently tapped the screw
holes with a taper tap and not with a bottom tap,
as should be the case.
There are three degrees of tap taper in common use.
The bottom tap is straight and obviously produces
straight threads, but it's not as easy to start straight.
A set screw screwed into a hole threaded with a taper
tap would force the knob apart and might be the cause
of the splitting.
73! Ken Kopp - K0PP
[email protected]
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