How the Oboe is Made
Adjusting the pipe

The photograph depicts, held in the right hand, a tool called a reamer, which is used to shave the interior surface of the instrument's pipe. There are ridges and valleys with variances of around 0.05 mm, which form subtle curves. Incidentally, the photograph shows the interior surfaces of a grenadilla pipe being shaved. Although grenadilla is a black material, the shavings are reddish brown.

An oboe pipe and a reamer for shaving the internal surface

An oboe pipe and a reamer for shaving the internal surface

The reamer is placed inside the pipe.

The reamer is placed inside the pipe.

Grenadilla shavings are reddish brown.

Grenadilla shavings are reddish brown.

The interior surface of the pipe is shaved down again after the key posts are affixed. The reason for this is that the wood sometimes becomes subtly unbalanced when key posts or other metallic parts are attached. The wood always varies by around 1%. The wood is affected by humidity and temperature, and any shaving always gives rise to new distortions. Therefore, several shavings are required before the instrument is ready.