From CNC programming to final inspection, from mechanical design to commissioning: everything is done in-house, in Geneva.
With a modern machine park and an experienced team, we produce high-precision mechanical parts in metal or engineering plastics.
Every step, from CNC programming to final inspection, is carried out rigorously to guarantee flawless quality and full compliance with the customer's requirements.
We design and integrate custom automated systems, combining precision mechanics and technical intelligence.
Every project is developed entirely in-house, from mechanical design to commissioning, to ensure performance, reliability and a long service life.
The workshop
Small precision parts, all materials, short lead times.
Watchmaking, Jewellery, Industry, Aerospace, Automotive, Research and culture.
Metals, alloys and engineering plastics: we advise you on the best material for your part.
Steel
Tooling, shafts, mechanical parts
Stainless steel
Corrosion-resistant parts, medical, food industry
Aluminium
Lightweight parts, housings, fixtures
Titanium
Light and very strong parts
Brass
Plates, bridges, decorative parts
Bronze
Bushings, bearings, friction parts
Copper
Electrical and thermal parts
Nickel silver
Watch plates and bridges
PEEK
High-performance engineering plastic
POM
Gears, guides, sliding parts
Vespel
High-temperature insulating parts
Gold
Material supplied by the customer
Every project benefits from our experimental approach: new materials, optimised machining techniques and working prototypes. This lets us create unique parts and machines, perfectly suited to each customer's needs, whether in aerospace, watchmaking or automotive.
We turn your concepts into working prototypes to test performance, reliability and ergonomics before production. The result: fewer risks, shorter lead times and fully optimised final products.
We design and manufacture our own machines, such as the ERI Côtes de Genève machine and its CNC control. We put this know-how at the service of your machines: we modernise your existing equipment (new CNC control, motorised axes, automation) so it gains precision and lasts longer, without buying a new machine.
From advanced composites to specific alloys, we constantly experiment with new solutions to produce parts that are stronger, lighter and more durable than market standards.
The ERI automatic machine is specially designed to produce Côtes de Genève, the emblematic decorative pattern of Swiss watchmaking, with precision and regularity.
The ERI CNC control provides precise, reliable control of machine tools on 2 or 3 axes, combining flexible programming and repeatable movements.
The ERI F3 is a 3-axis CNC milling machine that we design and manufacture entirely in our workshop, with travels adapted to your needs.
Three generations of engineers and machinists, one habit: building our own machines.
Our story
1975
André Kolly
1999
Pascal Kolly
2020
Adrien Broquet
Design and manufacture of custom machine tools for the precision industry.
A drawing, a sample or just an idea is enough to get started. You talk directly to a technician.