Production in the PETROF factory and
its logistics have passed through many changes compared to earlier methods.
Despite the effort of
incorporating modern technology, the company insists on making instruments by
hand, which guarantees the instruments have high tone quality. The timeless
style of the instruments with a brilliantly clear and rich sound and widen and
colourful range of the musical voice is the result of the perfect treatment of
each detail.
Unlike a lot of other manufacturers of key instruments, the PETROF plant produces a substantial part of raw products and instrument parts itself. The company workshops produce resonance boards, keyboards, hammers, strings, metal parts and a number of other parts. The only exception being cast iron frameworks and piano bodies, which are purchased.
At the customer's request it is possible to also use other parts from specialized world manufacturers. In some cases there is direct cooperation between them and PETROF. An example is the very successful close cooperation with the famous RENNER company. Besides original Renner actions and hammers, PETROF instruments also use the RENNER-PETROF actions. The basic material for building grand pianos and upright pianos is carefully selected wood. It is the material for the heart of the instrument - the resonance board and for individually constructed elements and parts. It also has significant influence on the beauty of the instrument, and therefore extraordinary attention is paid to its selection. The resonance board with a large vibrating surface and high internal strain is made exclusively from narrow ringed, strictly selected, radially cut resonance spruce. The high-quality European beech is used in the production of the bridges. The high-quality spruce and beech wood is further used for building the skeletons, featuring effective solution and generally rigid and stabile construction in our instruments.
The cast iron frameworks of the
instruments are of a modern
design and can reliably resist the pull of the strings which are kept under
tension for the duration of their long life by their connection with the
skeleton. They are drilled at PC operated drilling machines. The
production quality, modern equipment and the expertise of the company
employees are also used by foreign grand piano and upright piano
manufacturers, for whom the company produces (according to the foreign
company's construction designs) complete coated acoustic elements or even
finished instruments of other brands. The demands for similar
production continue to grow.
A significant part of the PETROF Piano factory is the keyboard department. Keyboards are made on highly efficient and precise automatic computer controlled machines.
Extraordinary attention 
is paid to
the surface treatment of all pianos during production.