Pepper Euphonium Thread Replacement
We received an old J.W. Pepper euphonium for a valve rebuild and found that all the casing screw threads were corroded beyond use, so they were replaced.
The top threads were unsoldered and replacements were fabricated on our metal
Once the new parts were completed they were soldered into place.
The bottom threads were not as simple.
Each of the casings were centered on the lathe and the old, damaged threads were cut away. The cylinders were counter-bored
to receive new thread inserts which were
then soldered into place. The bottom thread inserts were also fabricated at our shop.
The valve block and pistons are ready to go to the plater, where
they will have the cylinders honed to an oversized dimension. The pistons
will be plated oversized and refitted to their
respective cylinders. Upon return, we will do some final hand fitting and cleaning, then the
valve assembly will then be remounted to the rest of the instrument.
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