Cylinder liners and valve seats engineered to micron precision
From a 1960s grinding workshop to a modern CNC machine park. We manufacture spare parts for internal combustion engines that hold their tolerances and last for years — for customers in Poland and abroad.
Precision you can turn in your hands
Drag the model to rotate it and see the finish of the outer wall and the smoothness of the bore.
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Products
Experience you can feel in every part
Proven materials
Cast iron castings from MAHLE Poland and heat treatment deliver repeatable hardness and durability in every batch.
CNC precision
GILDEMEISTER machine tools and finish grinding let us hold tight dimensional tolerances.
Custom orders
We make parts from cast iron, steel and non-ferrous metals exactly to your specification.
Tradition since the 1960s
Over half a century of continuous production of engine spare parts for demanding customers.
We work with trusted brands
We use materials and solutions from reputable suppliers — a guarantee of repeatable quality in every batch.
Who are we?
GREGORIUS is a recognized manufacturer of spare parts for internal combustion engines, specializing in cylinder liners and valve seats. For decades we have delivered high-quality products tailored to individual customer needs — from single pieces to production runs.
Our Goal
We deliver products of the highest quality, continuously modernize our production processes and care for the environment. We treat every order individually, combining engineering precision with a partner-like approach to our customers.
Tradition → Development
Tradition
Our history dates back to the 1960s, when we started as a workshop for grinding cylinders and crankshafts. That is where we built the foundation of know-how we still rely on today.
Development
In 2004 we carried out a thorough restructuring, investing in quality and production efficiency. This allowed us to significantly expand our customer base in Poland and abroad — and we keep growing.
Need cylinder liners or valve seats?
We will match a part to your engine or make it to order.